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-rw-r--r--3dc/win95/Krender.c2830
1 files changed, 0 insertions, 2830 deletions
diff --git a/3dc/win95/Krender.c b/3dc/win95/Krender.c
deleted file mode 100644
index a52c1d5..0000000
--- a/3dc/win95/Krender.c
+++ /dev/null
@@ -1,2830 +0,0 @@
-/*KJL*********************************************************************
-* krender.c - Kevin's scandrawing code. (New render, new danger.) *
-* *
-* The new scandraws are called by patching the functions below into the *
-* jumptables used in item.c. If the KRENDER_ON flag in krender.h is zero *
-* then the old scandraws will be used. *
-*********************************************************************KJL*/
-
-/* this file is a bit messy at the moment, but I'll be back later... */
-#include "3dc.h"
-#include "inline.h"
-#include "module.h"
-#include "gamedef.h"
-#include "krender.h"
-#include "vision.h"
-
-#define UseLocalAssert Yes
-#include "ourasert.h"
-
-#define PENTIUM_PROFILING_ON 0
-#if PENTIUM_PROFILING_ON
-#include "pentime.h"
-#else
-#define ProfileStart();
-#define ProfileStop(x);
-#endif
-
-int ReciprocalTable[321];
-#if 1
-#define DIVIDE(a,b) ((a)/(b))
-#else
-#define DIVIDE(a,b) (MUL_FIXED((a),ReciprocalTable[(b)]))
-#endif
-
-
-int Transparent;
-
-/* assembler fns */
-extern void ScanDraw2D_Gouraud(void);
-extern void ScanDraw2D_GouraudTransparent(void);
-extern void ScanDraw2D_VAlignedTransparent(void);
-extern void ScanDraw2D_VAlignedOpaque(void);
-extern void ScanDraw2D_Transparent(void);
-extern void ScanDraw2D_TransparentLit(void);
-extern void ScanDraw2D_Opaque(void);
-extern void ScanDraw_GouraudScan(void);
-extern void ScanDrawF3D_Gouraud(void);
-
-/* globals accessed by the assembler routines */
-unsigned char *SCASM_Lighting;
-unsigned char *SCASM_Destination;
-unsigned char *SCASM_Bitmap;
-int SCASM_StartU;
-int SCASM_StartV;
-int SCASM_StartI;
-int SCASM_DeltaU;
-int SCASM_DeltaV;
-int SCASM_DeltaI;
-int SCASM_ScanLength;
-int SCASM_ShadingTableSize;
-int SCASM_TextureDeltaScan;
-
-/* things from item.c */
-extern int NumScans;
-extern int ItemColour;
-extern IMAGEHEADER *ImageHeaderPtrs[MaxImages];
-extern SCREENDESCRIPTORBLOCK ScreenDescriptorBlock;
-extern unsigned char *TextureLightingTable;
-extern int MIP_Index;
-extern int ScanData[maxpolys*maxscansize];
-extern unsigned char *ScreenBuffer;
-extern long BackBufferPitch;
-
-void Draw_Gouraud3dTexture_Spans(int *itemptr);
-
-int KRenderDrawMode = 0;
-
-/***********/
-
-void KR_ScanDraw_Item_Gouraud2dTexturePolygon_VideoModeType_8(int *itemptr)
-{
- POLYHEADER *pheader = (POLYHEADER *) itemptr;
- I_GOURAUD2DTEXTUREPOLYGON_SCAN *sptr;
-
- if(NumScans)
- {
- int y = NumScans;
- /* Get the Image Data required for the Draw */
- {
- IMAGEHEADER *ImageHdr;
- {
- int TxIndex = ItemColour & ClrTxDefn;
- ImageHdr = ImageHeaderPtrs[TxIndex];
- }
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- TEXTURE **TxImagePtr = &ImageHdr->ImagePtr;
- SCASM_Bitmap = TxImagePtr[MIP_Index];
- GLOBALASSERT(SCASM_Bitmap);
- SCASM_TextureDeltaScan = ImageHdr->ImageWidth >> MIP_Index;
- #if MIP_ROUNDUP
- if (ImageHdr->ImageWidth & (1<<MIP_Index)-1) ++SCASM_TextureDeltaScan;
- #endif
-
-
- }
- else
- {
- SCASM_TextureDeltaScan = ImageHdr->ImageWidth;
- SCASM_Bitmap = ImageHdr->ImagePtr;
- GLOBALASSERT(SCASM_Bitmap);
- }
- }
- SCASM_Lighting = TextureLightingTable;
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_Raw256) SCASM_ShadingTableSize = 256;
- else SCASM_ShadingTableSize = 64;
-
- sptr = (I_GOURAUD2DTEXTUREPOLYGON_SCAN *) ScanData;
- do
- {
- int dx = sptr->ig2s_x2 - sptr->ig2s_x1;
- if (dx>0 && !(sptr->ig2s_y & KRenderDrawMode) )
- {
- /* Fixed Point U for Interpolation */
- {
- int StartU = sptr->ig2s_u1;
- SCASM_DeltaU = DIVIDE((sptr->ig2s_u2 - StartU),dx);
- SCASM_StartU = StartU;
- }
-
- /* Fixed Point V for Interpolation */
- {
- int StartV = sptr->ig2s_v1;
- SCASM_DeltaV = DIVIDE((sptr->ig2s_v2 - StartV),dx);
- SCASM_StartV = StartV;
- }
- /* Fixed Point I for Interpolation */
- {
- int StartI = sptr->ig2s_c1;
- SCASM_DeltaI = DIVIDE((sptr->ig2s_c2 - StartI),dx);
- SCASM_StartI = StartI;
- }
- /* Draw the Gouraud 2d Texture Scan */
-
- SCASM_Destination = ScreenBuffer + (sptr->ig2s_y * BackBufferPitch) + sptr->ig2s_x1;
- SCASM_ScanLength = dx;
-
- if(pheader->PolyFlags & iflag_ignore0)
- {
- ScanDraw2D_GouraudTransparent();
- }
- else
- {
- ScanDraw2D_Gouraud();
- }
- }
- sptr++;
- y--;
- }
- while(y);
- }
-
-}
-
-void Draw3DScan(I_GOURAUD3DTEXTUREPOLYGON_SCAN *scanPtr, POLYHEADER *pheader)
-{
- int dx = scanPtr->ig3s_x2 - scanPtr->ig3s_x1;
-
- if(dx > 0)
- {
- float uf;
- float vf;
- float uf2;
- float vf2;
- /* Get start and end UVs */
- {
- float ooz1;
- ooz1 = 65536.0 / scanPtr->ig3s_z1;
- uf = scanPtr->ig3s_u1 * ooz1;
- vf = scanPtr->ig3s_v1 * ooz1;
- }
- {
- float ooz2;
- ooz2 = 65536.0 / scanPtr->ig3s_z2;
- uf2 = scanPtr->ig3s_u2 * ooz2;
- vf2 = scanPtr->ig3s_v2 * ooz2;
- }
- if ( (uf>16700000.0)
- ||(uf<0.0)
- ||(vf>16700000.0)
- ||(vf<0.0) )
- {
- textprint("WARNING: UV coords invalid\n");
- // LOCALASSERT(0);
- return;
- }
- if ( (uf2>16700000.0)
- ||(uf2<0.0)
- ||(vf2>16700000.0)
- ||(vf2<0.0) )
- {
- textprint("WARNING: UV coords invalid\n");
- // LOCALASSERT(0);
- return;
- }
- /* For UV interpolation */
- f2i(SCASM_StartU,uf);
- f2i(SCASM_StartV,vf);
- {
- int EndU,EndV;
- f2i(EndU,uf2);
- f2i(EndV,vf2);
- SCASM_DeltaU =(EndU-SCASM_StartU)/dx;
- SCASM_DeltaV =(EndV-SCASM_StartV)/dx;
- }
-
- /* Fixed Point I for Interpolation */
- {
- int StartI = scanPtr->ig3s_c1;
- SCASM_DeltaI = (scanPtr->ig3s_c2 - StartI)/dx;
- SCASM_StartI = StartI;
- }
-
- /* Draw the 3d Texture Scan */
- SCASM_Destination = ScreenBuffer + (scanPtr->ig3s_y * BackBufferPitch) + scanPtr->ig3s_x1;
- SCASM_ScanLength = dx;
-
- if(pheader->PolyFlags & iflag_ignore0)
- {
- ScanDraw2D_GouraudTransparent();
- }
- else
- {
- ScanDraw2D_Gouraud();
- }
- }
-}
-
-
-void KR_ScanDraw_Item_Gouraud3dTexturePolygon_Linear_S_VideoModeType_8(int *itemptr)
-{
- POLYHEADER *pheader = (POLYHEADER *) itemptr;
-
- int num_scans_s;
- I_GOURAUD3DTEXTUREPOLYGON_SCAN *sptr_array_ptr;
- I_GOURAUD3DTEXTUREPOLYGON_SCAN *next_free_sptr;
- I_GOURAUD3DTEXTUREPOLYGON_SCAN sptr_array[lin_s_max + 1];
- int StillSubdividing;
- int i;
-
-
- if(NumScans)
- {
- I_GOURAUD3DTEXTUREPOLYGON_SCAN *sptr;
- int y;
- /* Get the Image Data required for the Draw */
- {
- IMAGEHEADER *ImageHdr;
- {
- int TxIndex = ItemColour & ClrTxDefn;
- ImageHdr = ImageHeaderPtrs[TxIndex];
- }
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- TEXTURE **TxImagePtr = &ImageHdr->ImagePtr;
- SCASM_Bitmap = TxImagePtr[MIP_Index];
- GLOBALASSERT(SCASM_Bitmap);
- SCASM_TextureDeltaScan = ImageHdr->ImageWidth >> MIP_Index;
- #if MIP_ROUNDUP
- if (ImageHdr->ImageWidth & (1<<MIP_Index)-1) ++SCASM_TextureDeltaScan;
- #endif
-
- }
- else
- {
- SCASM_TextureDeltaScan = ImageHdr->ImageWidth;
- SCASM_Bitmap = ImageHdr->ImagePtr;
- GLOBALASSERT(SCASM_Bitmap);
- }
- }
- SCASM_Lighting = TextureLightingTable;
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_Raw256) SCASM_ShadingTableSize = 256;
- else SCASM_ShadingTableSize = 64;
-
-
- sptr = (I_GOURAUD3DTEXTUREPOLYGON_SCAN *) ScanData;
-
- for(y = NumScans; y!=0; y--)
- {
- int dx = sptr->ig3s_x2 - sptr->ig3s_x1;
- if (dx>0 && !(sptr->ig3s_y & KRenderDrawMode) )
- {
- float zmax, zmin, z_ratio;
-
- /* Have a look at the z-ratio */
- if(sptr->ig3s_z1 > sptr->ig3s_z2)
- {
- zmax = sptr->ig3s_z1;
- zmin = sptr->ig3s_z2;
- }
- else
- {
- zmax = sptr->ig3s_z2;
- zmin = sptr->ig3s_z1;
- }
- z_ratio = (zmax * 256);
-
-
- /* Draw if the z ratio is inside the threshold */
- if(z_ratio < lin_s_zthr*zmin)
- {
- Draw3DScan(sptr,pheader);
- }
- /* Else subdivide until scan segments are inside threshold */
- else
- {
- /* Copy the current scan to the subdivision array */
- sptr_array_ptr = sptr_array;
- num_scans_s = 1;
-
- sptr_array_ptr->ig3s_u1 = sptr->ig3s_u1;
- sptr_array_ptr->ig3s_v1 = sptr->ig3s_v1;
- sptr_array_ptr->ig3s_z1 = sptr->ig3s_z1;
- sptr_array_ptr->ig3s_c1 = sptr->ig3s_c1;
-
- sptr_array_ptr->ig3s_u2 = sptr->ig3s_u2;
- sptr_array_ptr->ig3s_v2 = sptr->ig3s_v2;
- sptr_array_ptr->ig3s_z2 = sptr->ig3s_z2;
- sptr_array_ptr->ig3s_c2 = sptr->ig3s_c2;
-
- sptr_array_ptr->ig3s_x1 = sptr->ig3s_x1;
- sptr_array_ptr->ig3s_x2 = sptr->ig3s_x2;
-
- sptr_array_ptr->ig3s_y = sptr->ig3s_y;
-
-
- /* Subdivide until no further divisions are needed */
-
- next_free_sptr = sptr_array_ptr + 1;
- do
- {
- sptr_array_ptr = sptr_array;
-
- StillSubdividing = No; /* Assume not */
-
- for(i = num_scans_s; i!=0; i--)
- {
- #if 0
- /* z ratio of this scan */
- if(sptr_array_ptr->ig3s_z1 > sptr_array_ptr->ig3s_z2)
- {
- z_ratio = (sptr_array_ptr->ig3s_z1 * 256) /
- sptr_array_ptr->ig3s_z2;
- }
- else
- {
- z_ratio = (sptr_array_ptr->ig3s_z2 * 256) /
- sptr_array_ptr->ig3s_z1;
- }
- /* Is it within the threshold? */
- if(z_ratio > lin_s_zthr && num_scans_s < lin_s_max)
- #endif
- int overThreshold=0;
- /* z ratio of this scan */
- if(sptr_array_ptr->ig3s_z1 > sptr_array_ptr->ig3s_z2)
- {
- if ( (sptr_array_ptr->ig3s_z1 * 256) > (lin_s_zthr*sptr_array_ptr->ig3s_z2))
- overThreshold=1;
- }
- else
- {
- if ( (sptr_array_ptr->ig3s_z2 * 256) > (lin_s_zthr*sptr_array_ptr->ig3s_z1))
- overThreshold=1;
- }
- /* Is it within the threshold? */
- if(overThreshold && num_scans_s < lin_s_max)
- {
- int mid_x, mid_c;
- float mid_u, mid_v, mid_z;
- /* No - subdivide */
- StillSubdividing = Yes;
-
- mid_u = (sptr_array_ptr->ig3s_u1 + sptr_array_ptr->ig3s_u2) / 2;
-
- mid_v = (sptr_array_ptr->ig3s_v1 + sptr_array_ptr->ig3s_v2) / 2;
-
- mid_z = (sptr_array_ptr->ig3s_z1 + sptr_array_ptr->ig3s_z2) / 2;
-
- mid_c = (sptr_array_ptr->ig3s_c1 + sptr_array_ptr->ig3s_c2) / 2;
-
- mid_x = (sptr_array_ptr->ig3s_x1 + sptr_array_ptr->ig3s_x2) / 2;
-
- /* Create new scan */
-
- next_free_sptr->ig3s_u1 = mid_u;
- next_free_sptr->ig3s_v1 = mid_v;
- next_free_sptr->ig3s_z1 = mid_z;
- next_free_sptr->ig3s_c1 = mid_c;
- next_free_sptr->ig3s_x1 = mid_x;
- next_free_sptr->ig3s_u2 = sptr_array_ptr->ig3s_u2;
- next_free_sptr->ig3s_v2 = sptr_array_ptr->ig3s_v2;
- next_free_sptr->ig3s_z2 = sptr_array_ptr->ig3s_z2;
- next_free_sptr->ig3s_c2 = sptr_array_ptr->ig3s_c2;
- next_free_sptr->ig3s_x2 = sptr_array_ptr->ig3s_x2;
- next_free_sptr->ig3s_y = sptr_array_ptr->ig3s_y;
- /* Redefine old scan */
-
- sptr_array_ptr->ig3s_u2 = mid_u;
- sptr_array_ptr->ig3s_v2 = mid_v;
- sptr_array_ptr->ig3s_z2 = mid_z;
- sptr_array_ptr->ig3s_c2 = mid_c;
- sptr_array_ptr->ig3s_x2 = mid_x;
-
- /* Update pointer and counter */
-
- next_free_sptr++;
- num_scans_s++;
-
- }
- sptr_array_ptr++;
- }
-
- }
- while(StillSubdividing);
-
- /* Draw the scan array */
- sptr_array_ptr = sptr_array;
- for(i = num_scans_s; i!=0; i--)
- {
- Draw3DScan(sptr_array_ptr,pheader);
- sptr_array_ptr++;
- }
- }
- }
- sptr++;
- }
- }
-}
-
-
-
-void KR_ScanDraw_Item_2dTexturePolygon_VideoModeType_8(int *itemptr)
-{
- POLYHEADER *pheader = (POLYHEADER *) itemptr;
- if(NumScans)
- {
- if(pheader->PolyFlags & iflag_nolight)
- {
- int y;
- I_2DTEXTUREPOLYGON_SCAN *sptr = (I_2DTEXTUREPOLYGON_SCAN *) ScanData;
-
- /* Offset in Screen Buffer */
- {
- IMAGEHEADER *ImageHdr;
- {
- int TxIndex = ItemColour & ClrTxDefn;
- ImageHdr = ImageHeaderPtrs[TxIndex];
- }
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- TEXTURE **TxImagePtr = &ImageHdr->ImagePtr;
- SCASM_Bitmap = TxImagePtr[MIP_Index];
- GLOBALASSERT(SCASM_Bitmap);
- SCASM_TextureDeltaScan = ImageHdr->ImageWidth >> MIP_Index;
- #if MIP_ROUNDUP
- if (ImageHdr->ImageWidth & (1<<MIP_Index)-1) ++SCASM_TextureDeltaScan;
- #endif
- }
- else
- {
- SCASM_TextureDeltaScan = ImageHdr->ImageWidth;
- SCASM_Bitmap = ImageHdr->ImagePtr;
- GLOBALASSERT(SCASM_Bitmap);
- }
- }
-
- /* Get the Image Data required for the Draw */
- for(y=NumScans; y!=0; y--)
- {
- int dx = sptr->i2s_x2 - sptr->i2s_x1;
-
- if (dx>0 && !(sptr->i2s_y & KRenderDrawMode) )
- {
- /* Fixed Point U for Interpolation */
- {
- int StartU = sptr->i2s_u1;
- SCASM_DeltaU = (sptr->i2s_u2 - StartU)/dx;
- SCASM_StartU = StartU;
- }
-
- /* Fixed Point V for Interpolation */
- {
- int StartV = sptr->i2s_v1;
- SCASM_DeltaV = (sptr->i2s_v2 - StartV)/dx;
- SCASM_StartV = StartV;
- }
-
- SCASM_Destination = ScreenBuffer + (sptr->i2s_y * BackBufferPitch) + sptr->i2s_x1;
- SCASM_ScanLength = dx;
-
-
- /* Is VDelta = 0? */
- if(SCASM_DeltaV == 0)
- {
- if(pheader->PolyFlags & iflag_ignore0)
- {
- ScanDraw2D_VAlignedTransparent();
- }
- else
- {
- ScanDraw2D_VAlignedOpaque();
- }
-
- }
- else
- {
- if(pheader->PolyFlags & iflag_ignore0)
- {
- ScanDraw2D_Transparent();
- }
- else
- {
- ScanDraw2D_Opaque();
- }
- }
- }
- sptr++;
- }
- }
- #if 1
- else
- {
- int y;
- I_2DTEXTUREPOLYGON_SCAN *sptr = (I_2DTEXTUREPOLYGON_SCAN *) ScanData;
- /* Offset in Screen Buffer */
- {
- IMAGEHEADER *ImageHdr;
- {
- int TxIndex = ItemColour & ClrTxDefn;
- ImageHdr = ImageHeaderPtrs[TxIndex];
- }
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- TEXTURE **TxImagePtr = &ImageHdr->ImagePtr;
- SCASM_Bitmap = TxImagePtr[MIP_Index];
- GLOBALASSERT(SCASM_Bitmap);
- SCASM_TextureDeltaScan = ImageHdr->ImageWidth >> MIP_Index;
- #if MIP_ROUNDUP
- if (ImageHdr->ImageWidth & (1<<MIP_Index)-1) ++SCASM_TextureDeltaScan;
- #endif
- }
- else
- {
- SCASM_TextureDeltaScan = ImageHdr->ImageWidth;
- SCASM_Bitmap = ImageHdr->ImagePtr;
- GLOBALASSERT(SCASM_Bitmap);
- }
- }
- SCASM_StartI = ItemColour >> TxDefn;
-
- SCASM_Lighting = TextureLightingTable;
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_Raw256) SCASM_ShadingTableSize = 256;
- else SCASM_ShadingTableSize = 64;
-
-
- /* Get the Image Data required for the Draw */
- for(y=NumScans; y!=0; y--)
- {
- int dx = sptr->i2s_x2 - sptr->i2s_x1;
- if (dx>0 && !(sptr->i2s_y & KRenderDrawMode) )
- {
- /* Fixed Point U for Interpolation */
- {
- int StartU = sptr->i2s_u1;
- SCASM_DeltaU = (sptr->i2s_u2 - StartU)/dx;
- SCASM_StartU = StartU;
- }
-
- /* Fixed Point V for Interpolation */
- {
- int StartV = sptr->i2s_v1;
- SCASM_DeltaV = (sptr->i2s_v2 - StartV)/dx;
- SCASM_StartV = StartV;
- }
-
- SCASM_Destination = ScreenBuffer + (sptr->i2s_y * BackBufferPitch) + sptr->i2s_x1;
- SCASM_ScanLength = dx;
-
- ScanDraw2D_TransparentLit();
- // PredatorScanDraw();
- }
- sptr++;
- }
-
-
- }
- #endif
- }
-
-}
-unsigned char LighterTable[255];
-int predatorTimer = 0;
-void ScanDraw_CloakedScan(void)
-{
- unsigned char *screen = SCASM_Destination;
- int x = SCASM_ScanLength;
-
- unsigned char buffer[1000];
- do
- {
- buffer[x] = *screen++;
- }
- while(--x);
-
- screen = SCASM_Destination;
- x = SCASM_ScanLength;
-
- if (FastRandom()&3==3 && x>2)
- {
- x--;
- screen++;
- }
- if (FastRandom()&3==3 && x>2)
- {
- x--;
- }
-
- do
- {
- {
- extern sine[];
- extern cosine[];
- unsigned char colour;
- int offset = (GetCos( ((x*2047)/SCASM_ScanLength + predatorTimer)&4095 )+65536)/2;
- offset = MUL_FIXED(offset,offset);
- colour = (buffer[SCASM_ScanLength-x+1]);
- // colour = (buffer[x]);
- #if 0
- int i;
- for (i=0; i<=255;i++)
- {
- if (colour==*(TextureLightingTable + 256*200 + i)) break;
- }
- #endif
- colour=*(TextureLightingTable + 256*(60+MUL_FIXED(4,GetCos(predatorTimer&4095)) ) + colour);
- *screen++ = colour;
-
- }
- }
- while(--x);
-
-}
-#if 0
-void PredatorScanDraw(void)
-{
- unsigned char *screen = SCASM_Destination;
- unsigned char *source;
-
- do
- {
- source = SCASM_Bitmap+ (SCASM_StartU>>16) + (SCASM_StartV>>16)*SCASM_TextureDeltaScan;
-
- *screen++ = *source++;
-
- SCASM_StartU += SCASM_DeltaU;
- SCASM_StartV += SCASM_DeltaV;
- }
- while(--SCASM_ScanLength);
-
-}
-#else
-void PredatorScanDraw(void)
-{
- unsigned char *screen = SCASM_Destination;
- unsigned char *source;
- int x = SCASM_ScanLength;
- do
- {
- source = SCASM_Bitmap+ (SCASM_StartU>>16) + (SCASM_StartV>>16)*SCASM_TextureDeltaScan;
-
- if (*source)
- {
- extern sine[];
- extern cosine[];
- unsigned char colour = *(screen);
- *screen = LighterTable[colour];
- }
- screen++;
- SCASM_StartU += SCASM_DeltaU;
- SCASM_StartV += SCASM_DeltaV;
- }
- while(--x);
-
-}
-#endif
-
-void Draw_Item_CloakedPolygon(int *itemptr)
-{
- POLYHEADER *pheader = (POLYHEADER *)itemptr;
- int minYVertex = 0;
- int maxYVertex = 0;
- int maxVertexNum = 0;
-
- {
- I_GOURAUDPOLYGON_PT *vertexPtr = (I_GOURAUDPOLYGON_PT*)&pheader->Poly1stPt;
- int minY = vertexPtr->i_y;
- int maxY = vertexPtr->i_y;
- vertexPtr++;
-
- do
- {
- maxVertexNum++;
-
- if (minY > vertexPtr->i_y)
- {
- minY = vertexPtr->i_y;
- minYVertex = maxVertexNum;
- }
- else if (maxY < vertexPtr->i_y)
- {
- maxY = vertexPtr->i_y;
- maxYVertex = maxVertexNum;
- }
- vertexPtr++;
- }
- while(vertexPtr->i_x != Term);
-
- }
-
-
- /* Initialise the Scan Data Buffer */
- {
- I_GOURAUDPOLYGON_PT *vertexPtr = (I_GOURAUDPOLYGON_PT*)&pheader->Poly1stPt;
- I_GOURAUDPOLYGON_SCAN *polyScan;
- int curVertex;
- int SecondOpinion=0;
-
- NumScans=0;
- /* scan out the right edge */
- polyScan = (I_GOURAUDPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
- int i,x,y;
- int deltaX,deltaI;
-
- int nextVertex = curVertex-1;
- if (nextVertex<0) nextVertex = maxVertexNum;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_int - vertexPtr[curVertex].i_int;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_int;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->igs_x2 = x>>16;
- x+=deltaX;
- polyScan->igs_c2 = i;
- i+=deltaI;
-
- polyScan->igs_y = y;
- NumScans++;
- polyScan++;
- }
- }
- curVertex--;
- if (curVertex<0) curVertex = maxVertexNum;
-
- }
- while(curVertex!=maxYVertex);
-
- /* scan out the left edge */
- polyScan = (I_GOURAUDPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
- int i,x,y;
- int deltaX,deltaI;
-
- int nextVertex = curVertex+1;
- if (nextVertex>maxVertexNum) nextVertex = 0;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_int - vertexPtr[curVertex].i_int;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_int;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->igs_x1 = x>>16;
- x+=deltaX;
- polyScan->igs_c1 = i;
- i+=deltaI;
-
- SecondOpinion++;
- polyScan++;
- }
- }
- curVertex++;
- if (curVertex>maxVertexNum) curVertex = 0;
-
- }
- while(curVertex!=maxYVertex);
-
- if (SecondOpinion<NumScans)
- {
- textprint("WARNING: Rasterization error\n");
- NumScans = SecondOpinion;
-// LOCALASSERT(0);
- return;
- }
-
- }
-
- //draw 'em
-
- {
- unsigned char colour= pheader->PolyColour;
- I_GOURAUDPOLYGON_SCAN *polyScan;
- polyScan = (I_GOURAUDPOLYGON_SCAN*)ScanData;
- SCASM_Lighting = TextureLightingTable+colour;
- SCASM_ShadingTableSize = 256;
-
- while(NumScans)
- {
- int dx = polyScan->igs_x2 - polyScan->igs_x1;
- if (dx>0)
- {
- SCASM_Destination = ScreenBuffer+(polyScan->igs_y * BackBufferPitch) + polyScan->igs_x1;
- SCASM_ScanLength = dx;
- SCASM_DeltaI = (polyScan->igs_c2-polyScan->igs_c1)/dx;
- SCASM_StartI = polyScan->igs_c1;
- ScanDraw_CloakedScan();
- }
- NumScans--;
- polyScan++;
- }
- }
-}
-#if 1
-void KDraw_Item_GouraudPolygon(int *itemptr)
-{
- POLYHEADER *pheader = (POLYHEADER *)itemptr;
- int minYVertex = 0;
- int maxYVertex = 0;
- int maxVertexNum = 0;
-
- {
- I_GOURAUDPOLYGON_PT *vertexPtr = (I_GOURAUDPOLYGON_PT*)&pheader->Poly1stPt;
- int minY = vertexPtr->i_y;
- int maxY = vertexPtr->i_y;
- vertexPtr++;
-
- do
- {
- maxVertexNum++;
-
- if (minY > vertexPtr->i_y)
- {
- minY = vertexPtr->i_y;
- minYVertex = maxVertexNum;
- }
- else if (maxY < vertexPtr->i_y)
- {
- maxY = vertexPtr->i_y;
- maxYVertex = maxVertexNum;
- }
- vertexPtr++;
- }
- while(vertexPtr->i_x != Term);
-
- }
-
-
- /* Initialise the Scan Data Buffer */
- {
- I_GOURAUDPOLYGON_PT *vertexPtr = (I_GOURAUDPOLYGON_PT*)&pheader->Poly1stPt;
- I_GOURAUDPOLYGON_SCAN *polyScan;
- int curVertex;
- int SecondOpinion=0;
-
- NumScans=0;
- /* scan out the right edge */
- polyScan = (I_GOURAUDPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
- int i,x,y;
- int deltaX,deltaI;
-
- int nextVertex = curVertex-1;
- if (nextVertex<0) nextVertex = maxVertexNum;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_int - vertexPtr[curVertex].i_int;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_int;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->igs_x2 = x>>16;
- x+=deltaX;
- polyScan->igs_c2 = i;
- i+=deltaI;
-
- polyScan->igs_y = y;
- NumScans++;
- polyScan++;
- }
- }
- curVertex--;
- if (curVertex<0) curVertex = maxVertexNum;
-
- }
- while(curVertex!=maxYVertex);
-
- /* scan out the left edge */
- polyScan = (I_GOURAUDPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
- int i,x,y;
- int deltaX,deltaI;
-
- int nextVertex = curVertex+1;
- if (nextVertex>maxVertexNum) nextVertex = 0;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_int - vertexPtr[curVertex].i_int;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_int;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->igs_x1 = x>>16;
- x+=deltaX;
- polyScan->igs_c1 = i;
- i+=deltaI;
-
- SecondOpinion++;
- polyScan++;
- }
- }
- curVertex++;
- if (curVertex>maxVertexNum) curVertex = 0;
-
- }
- while(curVertex!=maxYVertex);
-
- if (SecondOpinion<NumScans)
- {
- textprint("WARNING: Rasterization error\n");
- NumScans = SecondOpinion;
-// LOCALASSERT(0);
- return;
- }
-
- }
-
- //draw 'em
-
- {
- unsigned char colour= pheader->PolyColour;
- I_GOURAUDPOLYGON_SCAN *polyScan;
- polyScan = (I_GOURAUDPOLYGON_SCAN*)ScanData;
- SCASM_Lighting = TextureLightingTable+colour;
- SCASM_ShadingTableSize = 256;
-
- while(NumScans)
- {
- int dx = polyScan->igs_x2 - polyScan->igs_x1;
- if (dx>0)
- {
- SCASM_Destination = ScreenBuffer+(polyScan->igs_y * BackBufferPitch) + polyScan->igs_x1;
- SCASM_ScanLength = dx;
- SCASM_DeltaI = (polyScan->igs_c2-polyScan->igs_c1)/dx;
- SCASM_StartI = polyScan->igs_c1;
- ScanDraw_GouraudScan();
- }
- NumScans--;
- polyScan++;
- }
- }
-}
-void KDraw_Item_2dTexturePolygon(int *itemptr)
-{
-
- POLYHEADER *pheader = (POLYHEADER *) itemptr;
- int TxIndex;
- IMAGEHEADER *ImageHdr;
- ItemColour = pheader->PolyColour;
-
- TxIndex = ItemColour & ClrTxDefn;
- ImageHdr = ImageHeaderPtrs[TxIndex];
-
-
- /* Colour */
-
- /* If MIP Mapping, calculate the scale */
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- I_2DTEXTUREPOLYGON_PT *vector1;
- I_2DTEXTUREPOLYGON_PT *vector2;
- I_2DTEXTUREPOLYGON_PT *vector3;
- int mip1, mip2;
- int xyd, uvd;
- VECTOR2D s0, s1;
- VECTOR2D t0, t1;
-
-
- /* Screen and Texture Space Vectors */
- /* Express the "uvd / xyd" ratio as a binary scale */
-
- vector1 = (I_2DTEXTUREPOLYGON_PT *) &pheader->Poly1stPt;
- vector2 = &vector1[1];
- vector3 = &vector1[2];
-
-
- /* Vector 1 */
-
- s0.vx = vector1->i_x;
- s0.vy = vector1->i_y;
- s1.vx = vector2->i_x;
- s1.vy = vector2->i_y;
-
- t0.vx = vector1->i_u >> 16;
- t0.vy = vector1->i_v >> 16;
- t1.vx = vector2->i_u >> 16;
- t1.vy = vector2->i_v >> 16;
-
- xyd = FandVD_Distance_2d(&s0, &s1);
- uvd = FandVD_Distance_2d(&t0, &t1);
-
- mip1 = FindShift32(uvd, xyd);
-
-
- /* Vector 2 */
-
- s0.vx = vector2->i_x;
- s0.vy = vector2->i_y;
- s1.vx = vector3->i_x;
- s1.vy = vector3->i_y;
-
- t0.vx = t1.vx;
- t0.vy = t1.vy;
- t1.vx = vector3->i_u >> 16;
- t1.vy = vector3->i_v >> 16;
-
- xyd = FandVD_Distance_2d(&s0, &s1);
- uvd = FandVD_Distance_2d(&t0, &t1);
-
- mip2 = FindShift32(uvd, xyd);
-
-
- /* Choose the larger of the two */
-
- if(pheader->PolyFlags & iflag_no_mip) {
-
- MIP_Index = 0;
-
- }
-
- else {
-
- #if UseMIPMax
- if(mip1 > mip2)
- MIP_Index = mip1;
- else
- MIP_Index = mip2;
- #endif
-
- #if UseMIPMin
- if(mip1 > mip2)
- MIP_Index = mip2;
- else
- MIP_Index = mip1;
- #endif
-
- #if UseMIPAvg
- MIP_Index = (mip1 + mip2) >> 1;
- #endif
-
- }
-
-
- /* Clamp "MIP_Index" */
-
- #if MIP_INDEX_SUBTRACT
-
- MIP_Index -= MIP_INDEX_SUBTRACT;
- if(MIP_Index < 0) MIP_Index = 0;
- else if(MIP_Index > 6) MIP_Index = 6;
-
- #else
-
- if(MIP_Index > 6) MIP_Index = 6;
-
- #endif
-
- }
-
- {
- int minYVertex = 0;
- int maxYVertex = 0;
- int maxVertexNum = 0;
-
- {
- I_2DTEXTUREPOLYGON_PT *vertexPtr = (I_2DTEXTUREPOLYGON_PT*)&pheader->Poly1stPt;
- int minY = vertexPtr->i_y;
- int maxY = vertexPtr->i_y;
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- vertexPtr->i_u >>= MIP_Index;
- vertexPtr->i_v >>= MIP_Index;
- }
- vertexPtr++;
-
- do
- {
- maxVertexNum++;
-
- if (minY > vertexPtr->i_y)
- {
- minY = vertexPtr->i_y;
- minYVertex = maxVertexNum;
- }
- else if (maxY < vertexPtr->i_y)
- {
- maxY = vertexPtr->i_y;
- maxYVertex = maxVertexNum;
- }
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- vertexPtr->i_u >>= MIP_Index;
- vertexPtr->i_v >>= MIP_Index;
- }
-
- vertexPtr++;
- }
- while(vertexPtr->i_x != Term);
-
- }
-
-
- /* Initialise the Scan Data Buffer */
- {
- I_2DTEXTUREPOLYGON_PT *vertexPtr = (I_2DTEXTUREPOLYGON_PT*)&pheader->Poly1stPt;
- I_2DTEXTUREPOLYGON_SCAN *polyScan;
- int curVertex;
- int SecondOpinion = 0;
-
- NumScans=0;
- /* scan out the right edge */
- polyScan = (I_2DTEXTUREPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
-
- int nextVertex = curVertex-1;
- if (nextVertex<0) nextVertex = maxVertexNum;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int x,y,u,v;
- int deltaX,deltaU,deltaV;
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int widthU = vertexPtr[nextVertex].i_u - vertexPtr[curVertex].i_u;
- int widthV = vertexPtr[nextVertex].i_v - vertexPtr[curVertex].i_v;
-
- deltaX = (width<<16)/height;
- deltaU = widthU/height;
- deltaV = widthV/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- u = vertexPtr[curVertex].i_u;
- v = vertexPtr[curVertex].i_v;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->i2s_x2 = x>>16;
- x+=deltaX;
- polyScan->i2s_u2 = u;
- u+=deltaU;
- polyScan->i2s_v2 = v;
- v+=deltaV;
-
- polyScan->i2s_y = y;
- NumScans++;
- polyScan++;
- }
- }
- curVertex--;
- if (curVertex<0) curVertex = maxVertexNum;
-
- }
- while(curVertex!=maxYVertex);
-
- /* scan out the left edge */
- polyScan = (I_2DTEXTUREPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
-
- int nextVertex = curVertex+1;
- if (nextVertex>maxVertexNum) nextVertex = 0;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int x,y,u,v;
- int deltaX,deltaU,deltaV;
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int widthU = vertexPtr[nextVertex].i_u - vertexPtr[curVertex].i_u;
- int widthV = vertexPtr[nextVertex].i_v - vertexPtr[curVertex].i_v;
-
- deltaX = (width<<16)/height;
- deltaU = widthU/height;
- deltaV = widthV/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- u = vertexPtr[curVertex].i_u;
- v = vertexPtr[curVertex].i_v;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->i2s_x1 = x>>16;
- x+=deltaX;
- polyScan->i2s_u1 = u;
- u+=deltaU;
- polyScan->i2s_v1 = v;
- v+=deltaV;
-
- SecondOpinion++;
- polyScan++;
- }
- }
- curVertex++;
- if (curVertex>maxVertexNum) curVertex = 0;
-
- }
- while(curVertex!=maxYVertex);
-
- if (SecondOpinion<NumScans)
- {
- textprint("WARNING: Rasterization error\n");
- NumScans = SecondOpinion;
-// LOCALASSERT(0);
- return;
- }
- }
-
- //draw 'em
- KR_ScanDraw_Item_2dTexturePolygon_VideoModeType_8(itemptr);
-
- }
-}
-void KDraw_Item_Gouraud2dTexturePolygon(int *itemptr)
-{
- POLYHEADER *pheader = (POLYHEADER *) itemptr;
- int TxIndex;
- IMAGEHEADER *ImageHdr;
- ItemColour = pheader->PolyColour;
-
- TxIndex = ItemColour & ClrTxDefn;
- ImageHdr = ImageHeaderPtrs[TxIndex];
-
-
-
- /* Colour */
-
-
- /* If MIP Mapping, calculate the scale */
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- I_GOURAUD2DTEXTUREPOLYGON_PT *vector1;
- I_GOURAUD2DTEXTUREPOLYGON_PT *vector2;
- I_GOURAUD2DTEXTUREPOLYGON_PT *vector3;
- int mip1, mip2;
- int xyd, uvd;
- VECTOR2D s0, s1;
- VECTOR2D t0, t1;
-
-
- /* Screen and Texture Space Vectors */
- /* Express the "uvd / xyd" ratio as a binary scale */
-
- vector1 = (I_GOURAUD2DTEXTUREPOLYGON_PT *) &pheader->Poly1stPt;
- vector2 = &vector1[1];
- vector3 = &vector1[2];
-
-
- /* Vector 1 */
-
- s0.vx = vector1->i_x;
- s0.vy = vector1->i_y;
- s1.vx = vector2->i_x;
- s1.vy = vector2->i_y;
-
- t0.vx = vector1->i_u >> 16;
- t0.vy = vector1->i_v >> 16;
- t1.vx = vector2->i_u >> 16;
- t1.vy = vector2->i_v >> 16;
-
- xyd = FandVD_Distance_2d(&s0, &s1);
- uvd = FandVD_Distance_2d(&t0, &t1);
-
- mip1 = FindShift32(uvd, xyd);
-
-
- /* Vector 2 */
-
- s0.vx = vector2->i_x;
- s0.vy = vector2->i_y;
- s1.vx = vector3->i_x;
- s1.vy = vector3->i_y;
-
- t0.vx = t1.vx;
- t0.vy = t1.vy;
- t1.vx = vector3->i_u >> 16;
- t1.vy = vector3->i_v >> 16;
-
- xyd = FandVD_Distance_2d(&s0, &s1);
- uvd = FandVD_Distance_2d(&t0, &t1);
-
- mip2 = FindShift32(uvd, xyd);
-
-
- /* Choose the larger of the two */
-
- if(pheader->PolyFlags & iflag_no_mip) {
-
- MIP_Index = 0;
-
- }
-
- else {
-
- #if UseMIPMax
- if(mip1 > mip2)
- MIP_Index = mip1;
- else
- MIP_Index = mip2;
- #endif
-
- #if UseMIPMin
- if(mip1 > mip2)
- MIP_Index = mip2;
- else
- MIP_Index = mip1;
- #endif
-
- #if UseMIPAvg
- MIP_Index = (mip1 + mip2) >> 1;
- #endif
-
- }
-
-
- /* Clamp "MIP_Index" */
-
- #if MIP_INDEX_SUBTRACT
-
- MIP_Index -= MIP_INDEX_SUBTRACT;
- if(MIP_Index < 0) MIP_Index = 0;
- else if(MIP_Index > 6) MIP_Index = 6;
-
- #else
-
- if(MIP_Index > 6) MIP_Index = 6;
-
- #endif
-
- }
-
- {
- int minYVertex = 0;
- int maxYVertex = 0;
- int maxVertexNum = 0;
-
- {
- I_GOURAUD2DTEXTUREPOLYGON_PT *vertexPtr = (I_GOURAUD2DTEXTUREPOLYGON_PT*)&pheader->Poly1stPt;
- int minY = vertexPtr->i_y;
- int maxY = vertexPtr->i_y;
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- vertexPtr->i_u >>= MIP_Index;
- vertexPtr->i_v >>= MIP_Index;
- }
- vertexPtr++;
-
- do
- {
- maxVertexNum++;
-
- if (minY > vertexPtr->i_y)
- {
- minY = vertexPtr->i_y;
- minYVertex = maxVertexNum;
- }
- else if (maxY < vertexPtr->i_y)
- {
- maxY = vertexPtr->i_y;
- maxYVertex = maxVertexNum;
- }
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- vertexPtr->i_u >>= MIP_Index;
- vertexPtr->i_v >>= MIP_Index;
- }
-
- vertexPtr++;
- }
- while(vertexPtr->i_x != Term);
-
- }
-
-
- /* Initialise the Scan Data Buffer */
- {
- I_GOURAUD2DTEXTUREPOLYGON_PT *vertexPtr = (I_GOURAUD2DTEXTUREPOLYGON_PT*)&pheader->Poly1stPt;
- I_GOURAUD2DTEXTUREPOLYGON_SCAN *polyScan;
- int curVertex;
- int SecondOpinion=0;
-
- NumScans=0;
- /* scan out the right edge */
- polyScan = (I_GOURAUD2DTEXTUREPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
-
- int nextVertex = curVertex-1;
- if (nextVertex<0) nextVertex = maxVertexNum;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int i,x,y,u,v;
- int deltaX,deltaI,deltaU,deltaV;
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_i - vertexPtr[curVertex].i_i;
- int widthU = vertexPtr[nextVertex].i_u - vertexPtr[curVertex].i_u;
- int widthV = vertexPtr[nextVertex].i_v - vertexPtr[curVertex].i_v;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
- deltaU = widthU/height;
- deltaV = widthV/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_i;
- u = vertexPtr[curVertex].i_u;
- v = vertexPtr[curVertex].i_v;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->ig2s_x2 = x>>16;
- x+=deltaX;
- polyScan->ig2s_c2 = i;
- i+=deltaI;
- polyScan->ig2s_u2 = u;
- u+=deltaU;
- polyScan->ig2s_v2 = v;
- v+=deltaV;
-
- polyScan->ig2s_y = y;
- NumScans++;
- polyScan++;
- }
- }
- curVertex--;
- if (curVertex<0) curVertex = maxVertexNum;
-
- }
- while(curVertex!=maxYVertex);
-
- /* scan out the left edge */
- polyScan = (I_GOURAUD2DTEXTUREPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
-
- int nextVertex = curVertex+1;
- if (nextVertex>maxVertexNum) nextVertex = 0;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int i,x,y,u,v;
- int deltaX,deltaI,deltaU,deltaV;
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_i - vertexPtr[curVertex].i_i;
- int widthU = vertexPtr[nextVertex].i_u - vertexPtr[curVertex].i_u;
- int widthV = vertexPtr[nextVertex].i_v - vertexPtr[curVertex].i_v;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
- deltaU = widthU/height;
- deltaV = widthV/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_i;
- u = vertexPtr[curVertex].i_u;
- v = vertexPtr[curVertex].i_v;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->ig2s_x1 = x>>16;
- x+=deltaX;
- polyScan->ig2s_c1 = i;
- i+=deltaI;
- polyScan->ig2s_u1 = u;
- u+=deltaU;
- polyScan->ig2s_v1 = v;
- v+=deltaV;
-
- SecondOpinion++;
- polyScan++;
- }
- }
- curVertex++;
- if (curVertex>maxVertexNum) curVertex = 0;
-
- }
- while(curVertex!=maxYVertex);
-
- if (SecondOpinion<NumScans)
- {
- textprint("WARNING: Rasterization error\n");
- NumScans = SecondOpinion;
-// LOCALASSERT(0);
- return;
- }
- }
- //draw 'em
- KR_ScanDraw_Item_Gouraud2dTexturePolygon_VideoModeType_8(itemptr);
-
- #if 0
- {
- unsigned char colour= pheader->PolyColour;
- I_GOURAUD2DTEXTUREPOLYGON_SCAN *polyScan;
- polyScan = (I_GOURAUD2DTEXTUREPOLYGON_SCAN*)ScanData;
- SCASM_Lighting = TextureLightingTable+colour;
- SCASM_ShadingTableSize = 256;
-
- while(NumScans)
- {
- int dx = polyScan->ig2s_x2 - polyScan->ig2s_x1;
- if (dx>0)
- {
- SCASM_Destination = ScreenBuffer+(polyScan->ig2s_y * BackBufferPitch) + polyScan->ig2s_x1;
- SCASM_ScanLength = dx;
- SCASM_DeltaI = (polyScan->ig2s_c2-polyScan->ig2s_c1)/dx;
- SCASM_StartI = polyScan->ig2s_c1;
- ScanDraw_GouraudScan();
- }
- NumScans--;
- polyScan++;
- }
- }
- #endif
- }
-}
-#endif
-#if 0
-void KDraw_Item_Gouraud3dTexturePolygon(int *itemptr)
-{
- POLYHEADER *pheader = (POLYHEADER *) itemptr;
- int TxIndex;
- IMAGEHEADER *ImageHdr;
- ItemColour = pheader->PolyColour;
-
- TxIndex = ItemColour & ClrTxDefn;
- ImageHdr = ImageHeaderPtrs[TxIndex];
-
-
-
- /* Colour */
-
-
- /* If MIP Mapping, calculate the scale */
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- I_GOURAUD3DTEXTUREPOLYGON_PT *vector1;
- I_GOURAUD3DTEXTUREPOLYGON_PT *vector2;
- I_GOURAUD3DTEXTUREPOLYGON_PT *vector3;
- int mip1, mip2;
- int xyd, uvd;
- VECTOR2D s0, s1;
- VECTOR2D t0, t1;
-
-
- /* Screen and Texture Space Vectors */
- /* Express the "uvd / xyd" ratio as a binary scale */
-
- vector1 = (I_GOURAUD3DTEXTUREPOLYGON_PT *) &pheader->Poly1stPt;
- vector2 = &vector1[1];
- vector3 = &vector1[2];
-
-
- /* Vector 1 */
-
- s0.vx = vector1->i_x;
- s0.vy = vector1->i_y;
- s1.vx = vector2->i_x;
- s1.vy = vector2->i_y;
-
- t0.vx = vector1->i_gtx3d_u / vector1->i_gtx3d_z;
- t0.vy = vector1->i_gtx3d_v / vector1->i_gtx3d_z;
- t1.vx = vector2->i_gtx3d_u / vector2->i_gtx3d_z;
- t1.vy = vector2->i_gtx3d_v / vector2->i_gtx3d_z;
-
- xyd = FandVD_Distance_2d(&s0, &s1);
- uvd = FandVD_Distance_2d(&t0, &t1);
-
- mip1 = FindShift32(uvd, xyd);
-
-
- /* Vector 2 */
-
- s0.vx = vector2->i_x;
- s0.vy = vector2->i_y;
- s1.vx = vector3->i_x;
- s1.vy = vector3->i_y;
-
- t0.vx = t1.vx;
- t0.vy = t1.vy;
- t1.vx = vector3->i_gtx3d_u / vector3->i_gtx3d_z;
- t1.vy = vector3->i_gtx3d_v / vector3->i_gtx3d_z;
-
- xyd = FandVD_Distance_2d(&s0, &s1);
- uvd = FandVD_Distance_2d(&t0, &t1);
-
- mip2 = FindShift32(uvd, xyd);
-
-
- /* Choose the larger of the two */
-
- if(pheader->PolyFlags & iflag_no_mip) {
-
- MIP_Index = 0;
-
- }
-
- else {
-
- #if UseMIPMax
- if(mip1 > mip2)
- MIP_Index = mip1;
- else
- MIP_Index = mip2;
- #endif
-
- #if UseMIPMin
- if(mip1 > mip2)
- MIP_Index = mip2;
- else
- MIP_Index = mip1;
- #endif
-
- #if UseMIPAvg
- MIP_Index = (mip1 + mip2) >> 1;
- #endif
-
- }
-
-
- /* Clamp "MIP_Index" */
-
- #if MIP_INDEX_SUBTRACT
-
- MIP_Index -= MIP_INDEX_SUBTRACT;
- if(MIP_Index < 0) MIP_Index = 0;
- else if(MIP_Index > 6) MIP_Index = 6;
-
- #else
-
- if(MIP_Index > 6) MIP_Index = 6;
-
- #endif
-
- }
-
- {
- int minYVertex = 0;
- int maxYVertex = 0;
- int maxVertexNum = 0;
- float MIP_Divide = 1<<MIP_Index;
-
- {
- I_GOURAUD3DTEXTUREPOLYGON_PT *vertexPtr = (I_GOURAUD3DTEXTUREPOLYGON_PT*)&pheader->Poly1stPt;
- int minY = vertexPtr->i_y;
- int maxY = vertexPtr->i_y;
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- vertexPtr->i_gtx3d_u /= MIP_Divide;
- vertexPtr->i_gtx3d_v /= MIP_Divide;
- }
- vertexPtr++;
-
- do
- {
- maxVertexNum++;
-
- if (minY > vertexPtr->i_y)
- {
- minY = vertexPtr->i_y;
- minYVertex = maxVertexNum;
- }
- else if (maxY < vertexPtr->i_y)
- {
- maxY = vertexPtr->i_y;
- maxYVertex = maxVertexNum;
- }
-
- if(ScreenDescriptorBlock.SDB_Flags & SDB_Flag_MIP && ImageHdr->ImageFlags & ih_flag_mip)
- {
- vertexPtr->i_gtx3d_u /= MIP_Divide;
- vertexPtr->i_gtx3d_v /= MIP_Divide;
- }
-
- vertexPtr++;
- }
- while(vertexPtr->i_x != Term);
-
- }
-
-
- /* Initialise the Scan Data Buffer */
- {
- I_GOURAUD3DTEXTUREPOLYGON_PT *vertexPtr = (I_GOURAUD3DTEXTUREPOLYGON_PT*)&pheader->Poly1stPt;
- I_GOURAUD3DTEXTUREPOLYGON_SCAN *polyScan;
- int curVertex;
- int SecondOpinion=0;
-
- NumScans=0;
-
- /* scan out the right edge */
- polyScan = (I_GOURAUD3DTEXTUREPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
-
- int nextVertex = curVertex-1;
- if (nextVertex<0) nextVertex = maxVertexNum;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int i,x,y;
- float u,v,z;
- int deltaX,deltaI;
- float deltaU,deltaV,deltaZ;
-
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_gtx3d_i - vertexPtr[curVertex].i_gtx3d_i;
- float widthU = vertexPtr[nextVertex].i_gtx3d_u - vertexPtr[curVertex].i_gtx3d_u;
- float widthV = vertexPtr[nextVertex].i_gtx3d_v - vertexPtr[curVertex].i_gtx3d_v;
- float widthZ = vertexPtr[nextVertex].i_gtx3d_z - vertexPtr[curVertex].i_gtx3d_z;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
- deltaU = widthU/height;
- deltaV = widthV/height;
- deltaZ = widthZ/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_gtx3d_i;
- u = vertexPtr[curVertex].i_gtx3d_u;
- v = vertexPtr[curVertex].i_gtx3d_v;
- z = vertexPtr[curVertex].i_gtx3d_z;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->ig3s_x2 = x>>16;
- x+=deltaX;
- polyScan->ig3s_c2 = i;
- i+=deltaI;
- polyScan->ig3s_u2 = u;
- u+=deltaU;
- polyScan->ig3s_v2 = v;
- v+=deltaV;
- polyScan->ig3s_z2 = z;
- z+=deltaZ;
-
- polyScan->ig3s_y = y;
- NumScans++;
- polyScan++;
- }
- }
- curVertex--;
- if (curVertex<0) curVertex = maxVertexNum;
-
- }
- while(curVertex!=maxYVertex);
-
- /* scan out the left edge */
- polyScan = (I_GOURAUD3DTEXTUREPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
-
- int nextVertex = curVertex+1;
- if (nextVertex>maxVertexNum) nextVertex = 0;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int i,x,y;
- float u,v,z;
- int deltaX,deltaI;
- float deltaU,deltaV,deltaZ;
-
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_gtx3d_i - vertexPtr[curVertex].i_gtx3d_i;
- float widthU = vertexPtr[nextVertex].i_gtx3d_u - vertexPtr[curVertex].i_gtx3d_u;
- float widthV = vertexPtr[nextVertex].i_gtx3d_v - vertexPtr[curVertex].i_gtx3d_v;
- float widthZ = vertexPtr[nextVertex].i_gtx3d_z - vertexPtr[curVertex].i_gtx3d_z;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
- deltaU = widthU/height;
- deltaV = widthV/height;
- deltaZ = widthZ/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_gtx3d_i;
- u = vertexPtr[curVertex].i_gtx3d_u;
- v = vertexPtr[curVertex].i_gtx3d_v;
- z = vertexPtr[curVertex].i_gtx3d_z;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->ig3s_x1 = x>>16;
- x+=deltaX;
- polyScan->ig3s_c1 = i;
- i+=deltaI;
- polyScan->ig3s_u1 = u;
- u+=deltaU;
- polyScan->ig3s_v1 = v;
- v+=deltaV;
- polyScan->ig3s_z1 = z;
- z+=deltaZ;
-
- SecondOpinion++;
- polyScan++;
- }
- }
- curVertex++;
- if (curVertex>maxVertexNum) curVertex = 0;
-
- }
- while(curVertex!=maxYVertex);
-
- if (SecondOpinion<NumScans)
- {
- textprint("WARNING: Rasterization error\n");
- NumScans = SecondOpinion;
-// LOCALASSERT(0);
- return;
- }
- }
-
- //draw 'em
- KR_ScanDraw_Item_Gouraud3dTexturePolygon_Linear_S_VideoModeType_8(itemptr);
- }
-}
-#else
-void KDraw_Item_Gouraud3dTexturePolygon(int *itemptr)
-{
- POLYHEADER *pheader = (POLYHEADER *) itemptr;
- int TxIndex;
- IMAGEHEADER *ImageHdr;
- ItemColour = pheader->PolyColour;
-
- TxIndex = ItemColour & ClrTxDefn;
- ImageHdr = ImageHeaderPtrs[TxIndex];
-
-
-
- {
- int minYVertex = 0;
- int maxYVertex = 0;
- int maxVertexNum = 0;
-
-
- {
- I_GOURAUD3DTEXTUREPOLYGON_PT *vertexPtr = (I_GOURAUD3DTEXTUREPOLYGON_PT*)&pheader->Poly1stPt;
- int minY = vertexPtr->i_y;
- int maxY = vertexPtr->i_y;
-
- vertexPtr++;
-
- do
- {
- maxVertexNum++;
-
- if (minY > vertexPtr->i_y)
- {
- minY = vertexPtr->i_y;
- minYVertex = maxVertexNum;
- }
- else if (maxY < vertexPtr->i_y)
- {
- maxY = vertexPtr->i_y;
- maxYVertex = maxVertexNum;
- }
-
- vertexPtr++;
- }
- while(vertexPtr->i_x != Term);
-
- }
-
-
- /* Initialise the Scan Data Buffer */
- {
- I_GOURAUD3DTEXTUREPOLYGON_PT *vertexPtr = (I_GOURAUD3DTEXTUREPOLYGON_PT*)&pheader->Poly1stPt;
- I_GOURAUD3DTEXTUREPOLYGON_SCAN *polyScan;
- int curVertex;
- int SecondOpinion=0;
-
- NumScans=0;
-
- /* scan out the right edge */
- polyScan = (I_GOURAUD3DTEXTUREPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
-
- int nextVertex = curVertex-1;
- if (nextVertex<0) nextVertex = maxVertexNum;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int i,x,y;
- float u,v,z;
- int deltaX,deltaI;
- float deltaU,deltaV,deltaZ;
-
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_gtx3d_i - vertexPtr[curVertex].i_gtx3d_i;
- float widthU = vertexPtr[nextVertex].i_gtx3d_u - vertexPtr[curVertex].i_gtx3d_u;
- float widthV = vertexPtr[nextVertex].i_gtx3d_v - vertexPtr[curVertex].i_gtx3d_v;
- float widthZ = vertexPtr[nextVertex].i_gtx3d_z - vertexPtr[curVertex].i_gtx3d_z;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
- deltaU = widthU/height;
- deltaV = widthV/height;
- deltaZ = widthZ/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_gtx3d_i;
- u = vertexPtr[curVertex].i_gtx3d_u;
- v = vertexPtr[curVertex].i_gtx3d_v;
- z = vertexPtr[curVertex].i_gtx3d_z;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->ig3s_x2 = x>>16;
- x+=deltaX;
- polyScan->ig3s_c2 = i;
- i+=deltaI;
- polyScan->ig3s_u2 = u;
- u+=deltaU;
- polyScan->ig3s_v2 = v;
- v+=deltaV;
- polyScan->ig3s_z2 = z;
- z+=deltaZ;
-
- polyScan->ig3s_y = y;
- NumScans++;
- polyScan++;
- }
- }
- curVertex--;
- if (curVertex<0) curVertex = maxVertexNum;
-
- }
- while(curVertex!=maxYVertex);
-
- /* scan out the left edge */
- polyScan = (I_GOURAUD3DTEXTUREPOLYGON_SCAN*)ScanData;
- curVertex = minYVertex;
- do
- {
- int height;
-
- int nextVertex = curVertex+1;
- if (nextVertex>maxVertexNum) nextVertex = 0;
-
- height = vertexPtr[nextVertex].i_y - vertexPtr[curVertex].i_y;
- if (height!=0)
- {
- int i,x,y;
- float u,v,z;
- int deltaX,deltaI;
- float deltaU,deltaV,deltaZ;
-
- int width = vertexPtr[nextVertex].i_x - vertexPtr[curVertex].i_x;
- int contrast = vertexPtr[nextVertex].i_gtx3d_i - vertexPtr[curVertex].i_gtx3d_i;
- float widthU = vertexPtr[nextVertex].i_gtx3d_u - vertexPtr[curVertex].i_gtx3d_u;
- float widthV = vertexPtr[nextVertex].i_gtx3d_v - vertexPtr[curVertex].i_gtx3d_v;
- float widthZ = vertexPtr[nextVertex].i_gtx3d_z - vertexPtr[curVertex].i_gtx3d_z;
-
- deltaX = (width<<16)/height;
- deltaI = contrast/height;
- deltaU = widthU/height;
- deltaV = widthV/height;
- deltaZ = widthZ/height;
-
- x = vertexPtr[curVertex].i_x<<16;
- i = vertexPtr[curVertex].i_gtx3d_i;
- u = vertexPtr[curVertex].i_gtx3d_u;
- v = vertexPtr[curVertex].i_gtx3d_v;
- z = vertexPtr[curVertex].i_gtx3d_z;
-
- for (y=vertexPtr[curVertex].i_y; y<vertexPtr[nextVertex].i_y; y++)
- {
- polyScan->ig3s_x1 = x>>16;
- x+=deltaX;
- polyScan->ig3s_c1 = i;
- i+=deltaI;
- polyScan->ig3s_u1 = u;
- u+=deltaU;
- polyScan->ig3s_v1 = v;
- v+=deltaV;
- polyScan->ig3s_z1 = z;
- z+=deltaZ;
-
- SecondOpinion++;
- polyScan++;
- }
- }
- curVertex++;
- if (curVertex>maxVertexNum) curVertex = 0;
-
- }
- while(curVertex!=maxYVertex);
-
- if (SecondOpinion<NumScans)
- {
- textprint("WARNING: Rasterization error\n");
- NumScans = SecondOpinion;
-// LOCALASSERT(0);
- return;
- }
- }
-
- //draw 'em
- Draw_Gouraud3dTexture_Spans(itemptr);
- }
-}
-
-#define PERS_STEP 16
-void Draw_Gouraud3dTexture_Spans(int *itemptr)
-{
- I_GOURAUD3DTEXTUREPOLYGON_SCAN *sptr;
-
- if(NumScans)
- {
- int y = NumScans;
- /* Get the Image Data required for the Draw */
- {
- IMAGEHEADER *ImageHdr;
- {
- int TxIndex = ItemColour & ClrTxDefn;
- ImageHdr = ImageHeaderPtrs[TxIndex];
- }
- {
- SCASM_TextureDeltaScan = ImageHdr->ImageWidth;
- SCASM_Bitmap = ImageHdr->ImagePtr;
- GLOBALASSERT(SCASM_Bitmap);
- }
- }
- SCASM_Lighting = TextureLightingTable;
-
- sptr = (I_GOURAUD3DTEXTUREPOLYGON_SCAN *) ScanData;
- do
- {
- int length = sptr->ig3s_x2 - sptr->ig3s_x1;
- int dx=length;
-
- if (dx>0 && !(sptr->ig3s_y & KRenderDrawMode) )
- {
- float deltaZ;
- float endZ;
-
- float endU,endV;
- float deltaU,deltaV;
-
- {
- int StartI = sptr->ig3s_c1;
- SCASM_DeltaI = (sptr->ig3s_c2 - StartI)/dx;
- SCASM_StartI = StartI;
- }
-
- SCASM_Destination = ScreenBuffer + (sptr->ig3s_y * BackBufferPitch) + sptr->ig3s_x1;
- SCASM_ScanLength = PERS_STEP;
-
- {
- float oneOverdx = 1.0/dx;
-
- endZ = sptr->ig3s_z1;
- deltaZ = (sptr->ig3s_z2 - endZ)*oneOverdx;
-
- endU = sptr->ig3s_u1;
- deltaU = (sptr->ig3s_u2 - endU)*oneOverdx;
-
- endV = sptr->ig3s_v1;
- deltaV = (sptr->ig3s_v2 - endV)*oneOverdx;
- }
- {
- float z = 65536.0/endZ;
- SCASM_StartU = endU*z;
- SCASM_StartV = endV*z;
- }
- while(dx>PERS_STEP)
- {
- /* subdivide! */
- int u,v;
-
- dx -= PERS_STEP;
-
- endZ += PERS_STEP*deltaZ;
- endU += PERS_STEP*deltaU;
- endV += PERS_STEP*deltaV;
-
- {
- float z = 65536.0/endZ;
- u = endU*z;
- v = endV*z;
- }
- SCASM_DeltaU = (u-SCASM_StartU)/PERS_STEP;
- SCASM_DeltaV = (v-SCASM_StartV)/PERS_STEP;
-
- /* draw PERS_STEP pixels */
- ScanDraw2D_Gouraud();
-
- SCASM_StartU = u;
- SCASM_StartV = v;
-
- SCASM_Destination +=PERS_STEP;
- SCASM_StartI += PERS_STEP*SCASM_DeltaI;
- }
- if (dx>0)
- {
- int u,v;
- SCASM_ScanLength = dx;
- {
- float z = 65536.0/sptr->ig3s_z2;
- u = sptr->ig3s_u2*z;
- v = sptr->ig3s_v2*z;
- }
- SCASM_DeltaU = (u-SCASM_StartU)/dx;
- SCASM_DeltaV = (v-SCASM_StartV)/dx;
-
- /* draw 8 pixels */
- ScanDraw2D_Gouraud();
- }
-
-
-
-
-
- }
- sptr++;
- y--;
- }
- while(y);
- }
-
-}
-#endif
-
-
-
-
-
-
-
-
-
-
-
-#if 0
-void MakeInverseLightingTable(void)
-{
- int lookingForColour;
-
- for(lookingForColour=1; lookingForColour<=255; lookingForColour++)
- {
- int exit =0;
- int table;
- for (table=128; (table>0 && (!exit)); table--)
- {
- int entry;
- for(entry=1; (entry<=255 && (!exit)); entry++)
- {
- if(lookingForColour == *(TextureLightingTable + 256*(table) + entry))
- {
- LighterTable[lookingForColour] = entry;
- exit=1;
- }
- }
- }
- if (exit==0) LighterTable[lookingForColour] = 255;
- }
-}
-#endif
-struct ColourVector
-{
- VECTORCH Direction;
- int Magnitude;
-};
-
-struct ColourVector ColourTable[256];
-
-void MakeInverseLightingTable(void)
-{
- extern unsigned char TestPalette[];
- unsigned char *palPtr = TestPalette;
- int i;
-
- for(i = 0; i < 256; i++)
- {
- VECTORCH colour;
- int mag;
-
- colour.vx = *palPtr++;
- colour.vy = *palPtr++;
- colour.vz = *palPtr++;
- mag = Magnitude(&colour);
-
- if (mag!=0)
- {
- colour.vx = (colour.vx*32)/mag;
- colour.vy = (colour.vy*32)/mag;
- colour.vz = (colour.vz*32)/mag;
- }
- ColourTable[i].Magnitude = mag;
- ColourTable[i].Direction = colour;
- }
-
- for(i = 0; i < 256; i++)
- {
- int entry;
- int brightest=0;
-
- for(entry = 0; entry < 256; entry++)
- {
- VECTORCH v1 = ColourTable[i].Direction;
- VECTORCH v2 = ColourTable[entry].Direction;
-
- if ((v1.vx == v2.vx)
- &&(v1.vy == v2.vy)
- &&(v1.vz == v2.vz)
- &&(ColourTable[i].Magnitude < ColourTable[entry].Magnitude)
- &&(ColourTable[brightest].Magnitude > ColourTable[entry].Magnitude ||(!brightest)))
- brightest = entry;
- }
- if (brightest==0)
- {
- for(entry = 0; entry < 256; entry++)
- {
- VECTORCH v1 = ColourTable[i].Direction;
- VECTORCH v2 = ColourTable[entry].Direction;
-
- if ((v1.vx>>2 == v2.vx>>1)
- &&(v1.vy>>2 == v2.vy>>1)
- &&(v1.vz>>2 == v2.vz>>1)
- &&(ColourTable[i].Magnitude < ColourTable[entry].Magnitude)
- &&(ColourTable[brightest].Magnitude > ColourTable[entry].Magnitude ||(!brightest)))
-
- brightest = entry;
- }
- }
-
- if (brightest==0)
- {
- for(entry = 0; entry < 256; entry++)
- {
- VECTORCH v1 = ColourTable[i].Direction;
- VECTORCH v2 = ColourTable[entry].Direction;
-
- if ((v1.vx>>2 == v2.vx>>2)
- &&(v1.vy>>2 == v2.vy>>2)
- &&(v1.vz>>2 == v2.vz>>2)
- &&(ColourTable[i].Magnitude < ColourTable[entry].Magnitude)
- &&(ColourTable[brightest].Magnitude > ColourTable[entry].Magnitude ||(!brightest)))
- brightest = entry;
- }
- }
- #if 0
- if (brightest==0)
- {
- for(entry = 0; entry < 256; entry++)
- {
- VECTORCH v1 = ColourTable[i].Direction;
- VECTORCH v2 = ColourTable[entry].Direction;
-
- if ((v1.vx>>3 == v2.vx>>3)
- &&(v1.vy>>3 == v2.vy>>3)
- &&(v1.vz>>3 == v2.vz>>3)
- &&(ColourTable[i].Magnitude < ColourTable[entry].Magnitude)
- &&(ColourTable[brightest].Magnitude > ColourTable[entry].Magnitude ||(!brightest)))
- brightest = entry;
- }
- }
-
- #endif
- if (brightest==0) brightest = i;
-
- LighterTable[i] = brightest;
- }
-
-
-}
-
-
-void DrawPaletteScreen(void)
-{
- int sortedColours[256];
- {
- extern unsigned char TestPalette[];
- unsigned char *palPtr = TestPalette;
- int i;
-
- for(i = 0; i < 256; i++)
- {
- VECTORCH colour;
- int mag;
-
- colour.vx = *palPtr++;
- colour.vy = *palPtr++;
- colour.vz = *palPtr++;
- mag = Magnitude(&colour);
-
- if (mag!=0)
- {
- colour.vx = (colour.vx*7)/mag;
- colour.vy = (colour.vy*7)/mag;
- colour.vz = (colour.vz*7)/mag;
- }
- ColourTable[i].Magnitude = mag;
- ColourTable[i].Direction = colour;
- }
-
- for(i = 0; i<256; i++)
- {
- int e;
- int maxKey=-1;
- int selectedEntry=0;
-
- for (e=0; e<256; e++)
- {
- int key = ColourTable[e].Direction.vx + ColourTable[e].Direction.vy*64+ColourTable[e].Direction.vz*64*64;
- if (key>maxKey)
- {
- maxKey = key;
- selectedEntry = e;
- }
- else if (key==maxKey)
- {
- if (ColourTable[e].Magnitude<ColourTable[selectedEntry].Magnitude)
- selectedEntry = e;
- }
- }
-
- sortedColours[i] = selectedEntry;
- ColourTable[selectedEntry].Direction.vx=-1;
- ColourTable[selectedEntry].Direction.vy=-1;
- ColourTable[selectedEntry].Direction.vz=-1;
- }
-
- }
- {
- char colour = 0;
- int *bufferPtr = (int*)ScreenBuffer;
- int i,x,y;
-
- for (i=0; i<=12; i++)
- {
- for (y=0; y<=6; y++)
- {
- for (x=0; x<=19; x++)
- {
- unsigned int c=colour+x;
-
- if (c<256)
- {
- c = sortedColours[c];
- c = c + (c<<8) + (c<<16) +(c<<24);
- *bufferPtr++=c;
- *bufferPtr++=c;
- *bufferPtr++=c;
- *bufferPtr++=c;
- }
- else
- {
- bufferPtr++;
- bufferPtr++;
- bufferPtr++;
- bufferPtr++;
- }
- }
- }
- colour+=20;
- }
- }
-
- #if 0
- {
- extern unsigned char TestPalette[];
- unsigned char *palPtr = TestPalette;
- int i;
-
- for(i = 0; i < 256; i++)
- {
- VECTORCH colour;
- int mag;
-
- colour.vx = *palPtr++;
- colour.vy = *palPtr++;
- colour.vz = *palPtr++;
- mag = Magnitude(&colour);
- if (mag!=0)
- {
- colour.vx = (colour.vx*63)/mag;
- colour.vy = (colour.vy*63)/mag;
- colour.vz = (colour.vz*63)/mag;
- }
-
- ColourTable[i].Direction = colour;
- ColourTable[i].Magnitude = mag;
- }
-
- for(i = 0; i<256; i++)
- {
- int e;
- int maxKey=-1;
- int selectedEntry=0;
-
- for (e=0; e<256; e++)
- {
- int key = ColourTable[e].Magnitude;
-
- if (key>maxKey)
- {
- maxKey = key;
- selectedEntry = e;
- }
- else if (key==maxKey)
- {
- int key2 = ColourTable[e].Direction.vx + ColourTable[e].Direction.vy*64+ColourTable[e].Direction.vz*64*64;
- int key3 = ColourTable[selectedEntry].Direction.vx
- + ColourTable[selectedEntry].Direction.vy*64
- + ColourTable[selectedEntry].Direction.vz*64*64;
-
- if (key2<key3)
- selectedEntry=e;
- }
-
- }
-
- sortedColours[i] = selectedEntry;
- ColourTable[selectedEntry].Magnitude=-1;
- }
-
- }
- {
- char colour = 0;
- int *bufferPtr = (int*)(ScreenBuffer+32000);
- int i,x,y;
-
- for (i=0; i<=12; i++)
- {
- for (y=0; y<=6; y++)
- {
- for (x=0; x<=19; x++)
- {
- unsigned int c=colour+x;
-
- if (c<256)
- {
- c = sortedColours[c];
- c = c + (c<<8) + (c<<16) +(c<<24);
- *bufferPtr++=c;
- *bufferPtr++=c;
- *bufferPtr++=c;
- *bufferPtr++=c;
- }
- else
- {
- bufferPtr++;
- bufferPtr++;
- bufferPtr++;
- bufferPtr++;
- }
- }
- }
- colour+=20;
- }
- }
- #else
- {
- extern unsigned char TestPalette[];
- char colour = 0;
- int *bufferPtr = (int*)(ScreenBuffer+32000);
- int i,x,y;
-
- for (i=0; i<=12; i++)
- {
- for (y=0; y<=6; y++)
- {
- for (x=0; x<=19; x++)
- {
- unsigned int c=colour+x;
-
- if (c<256)
- {
- c = c + (c<<8) + (c<<16) +(c<<24);
- *bufferPtr++=c;
- *bufferPtr++=c;
- *bufferPtr++=c;
- *bufferPtr++=c;
- }
- else
- {
- bufferPtr++;
- bufferPtr++;
- bufferPtr++;
- bufferPtr++;
- }
- }
- }
- colour+=20;
- }
- }
- #endif
-}
-
-void OddLineScreenCopy(unsigned int *source,unsigned int *dest)
-{
- int lines = 240;
-
- do
- {
- int i = 640/4;
-
- dest += 640/4;
- source += 640/4;
-
- do
- {
- *dest++=*source++;
- }
- while(--i);
- }
- while(--lines);
-
-}
-
-
-
-/*KJL*****************************************************
-* Palette fading; a value of 65536 corresponds to normal *
-* palette, 0 is completely black. *
-*****************************************************KJL*/
-void SetPaletteFadeLevel(int fadeLevel)
-{
- extern int ScanDrawMode;
- if(ScanDrawDirectDraw == ScanDrawMode)
- {
- extern unsigned char TestPalette[];
- extern unsigned char TestPalette2[];
- {
- int x;
- for (x=0; x<768; x++)
- {
- TestPalette2[x] = ((unsigned int)TestPalette[x]*fadeLevel)>>16;
- }
- }
- ChangePalette(TestPalette2);
- }
- else
- {
- d3d_light_ctrl.ctrl = LCCM_CONSTCOLOUR;
- d3d_light_ctrl.r = fadeLevel;
- d3d_light_ctrl.g = fadeLevel;
- d3d_light_ctrl.b = fadeLevel;
- }
-}
-
-void FadeBetweenPalettes(unsigned char *palPtr, int fadeLevel)
-{
- extern unsigned char TestPalette[];
- unsigned char TestPalette3[768];
- {
- int x;
- for (x=0; x<768; x++)
- {
- TestPalette3[x] = ( (unsigned int)TestPalette[x]*fadeLevel + (unsigned int)(palPtr[x])*(65536-fadeLevel) )>>16;
- }
- }
- ChangePalette(TestPalette3);
-}
-void FadePaletteToWhite(unsigned char *palPtr,int fadeLevel)
-{
- unsigned char TestPalette3[768];
- {
- int x;
- for (x=0; x<768; x++)
- {
- TestPalette3[x] = ( (unsigned int)(palPtr[x])*fadeLevel + 63*(65536-fadeLevel) )>>16;
- }
- }
- ChangePalette(TestPalette3);
-}
-
-
-void BlankScreen(void)
-{
- extern int ScanDrawMode;
-
- if (ScanDrawDirectDraw==ScanDrawMode)
- {
- extern unsigned char *ScreenBuffer;
- extern unsigned char TestPalette[];
- unsigned int *screenPtr;
- int i;
-
- screenPtr = (unsigned int *)ScreenBuffer;
- i = ScreenDescriptorBlock.SDB_Width * ScreenDescriptorBlock.SDB_Height /4;
- do
- {
- *screenPtr++=0;
- }
- while(--i);
- }
- else
- {
- ColourFillBackBuffer(0);
- }
-
- // FlipBuffers();
-}
-
-
-
-
-void GenerateReciprocalTable(void)
-{
- int i=320;
-
- do
- {
- ReciprocalTable[i] = 65536/i;
- }
- while(--i);
-}
-
-
-
-
-#if 0
-#define NO_OF_STARS 500
-typedef struct
-{
- VECTORCH Position;
- int Colour;
-
-} STARDESC;
-static STARDESC StarArray[NO_OF_STARS];
-#endif
-void CreateStarArray(void)
-{
- #if 0
- int i;
- extern int sine[],cosine[];
- for(i=0; i<NO_OF_STARS; i++)
- {
- int phi = FastRandom()&4095;
- int theta = FastRandom()&4095;
-
- StarArray[i].Position.vx = MUL_FIXED(GetCos(phi),GetSin(theta));
- StarArray[i].Position.vy = MUL_FIXED(GetSin(phi),GetSin(theta));
- StarArray[i].Position.vz = GetCos(theta);
- StarArray[i].Colour = FastRandom()&32767;
- }
- #endif
-}
-
-/* KJL 12:10:36 9/30/97 - starfield, currently implemented for 8 & 16 bit displays */
-void DrawStarfilledSky(void)
-{
- #if 0
- int i;
- extern VIEWDESCRIPTORBLOCK *Global_VDB_Ptr;
- extern int ScanDrawMode;
-
- /* blank the screen */
- ColourFillBackBuffer(0);
-
- LockSurfaceAndGetBufferPointer();
-
- if(AvP.PlayerType==I_Alien) /* wide frustrum */
- {
- for(i=0; i<NO_OF_STARS; i++)
- {
- VECTORCH rotatedPosition = StarArray[i].Position;
-
- /* rotate star into view space */
- RotateVector(&rotatedPosition,&(Global_VDB_Ptr->VDB_Mat));
-
- /* is star within alien (wide) view frustrum ? */
- if((-rotatedPosition.vx <= rotatedPosition.vz*2)
- &&(rotatedPosition.vx <= rotatedPosition.vz*2)
- &&(-rotatedPosition.vy*2 <= rotatedPosition.vz*3)
- &&(rotatedPosition.vy*2 <= rotatedPosition.vz*3))
- {
- /* project into screen space */
- int y = (rotatedPosition.vy*(Global_VDB_Ptr->VDB_ProjY))/rotatedPosition.vz+Global_VDB_Ptr->VDB_CentreY;
- int x = (rotatedPosition.vx*(Global_VDB_Ptr->VDB_ProjX))/rotatedPosition.vz+Global_VDB_Ptr->VDB_CentreX;
-
- /* draw pixel of required bit depth */
- if (ScanDrawMode == ScanDrawDirectDraw)
- {
- /* 8 bit mode */
- *(ScreenBuffer + x + y*BackBufferPitch) = StarArray[i].Colour&255;
- }
- else
- {
- /* 16 bit mode */
- *(unsigned short*)(ScreenBuffer + (x*2 + y*BackBufferPitch)) = StarArray[i].Colour;
- }
- }
- }
- }
- else /* normal frustrum */
- {
- for(i=0; i<NO_OF_STARS; i++)
- {
- VECTORCH rotatedPosition = StarArray[i].Position;
-
- /* rotate star into view space */
- RotateVector(&rotatedPosition,&(Global_VDB_Ptr->VDB_Mat));
-
- /* is star within normal view frustrum ? */
- if((-rotatedPosition.vx <= rotatedPosition.vz)
- &&(rotatedPosition.vx <= rotatedPosition.vz)
- &&(-rotatedPosition.vy*4 <= rotatedPosition.vz*3)
- &&(rotatedPosition.vy*4 <= rotatedPosition.vz*3))
- {
- /* project into screen space */
- int y = (rotatedPosition.vy*(Global_VDB_Ptr->VDB_ProjY))/rotatedPosition.vz+Global_VDB_Ptr->VDB_CentreY;
- int x = (rotatedPosition.vx*(Global_VDB_Ptr->VDB_ProjX))/rotatedPosition.vz+Global_VDB_Ptr->VDB_CentreX;
-
- /* draw pixel of required bit depth */
- if (ScanDrawMode == ScanDrawDirectDraw)
- {
- /* 8 bit mode */
- *(ScreenBuffer + x + y*BackBufferPitch) = StarArray[i].Colour&255;
- }
- else
- {
- /* 16 bit mode */
- *(unsigned short*)(ScreenBuffer + (x*2 + y*BackBufferPitch)) = StarArray[i].Colour;
- }
- }
- }
- }
-
- UnlockSurface();
- #endif
-} \ No newline at end of file
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