585 lines
16 KiB
C++
585 lines
16 KiB
C++
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/******************************************************************************
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Plush Version 1.2
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pf_tex.c
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Affine Texture Mapping Rasterizers
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Copyright (c) 1996-2000, Justin Frankel
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******************************************************************************/
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#include "plush.h"
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#include "putface.h"
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void plPF_TexEnv(pl_Cam *cam, pl_Face *TriFace) {
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pl_uChar i0, i1, i2;
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pl_uChar *gmem = cam->frameBuffer;
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pl_uChar *remap;
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pl_ZBuffer *zbuf = cam->zBuffer;
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pl_sInt32 MappingU1, MappingU2, MappingU3;
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pl_sInt32 MappingV1, MappingV2, MappingV3;
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pl_sInt32 MappingU_AND, MappingV_AND;
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pl_sInt32 eMappingU1, eMappingU2, eMappingU3;
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pl_sInt32 eMappingV1, eMappingV2, eMappingV3;
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pl_sInt32 eMappingU_AND, eMappingV_AND;
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pl_uChar *texture, *environment;
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pl_uChar vshift;
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pl_uChar evshift;
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pl_uInt16 *addtable;
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pl_Texture *Texture, *Environment;
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pl_uChar stat;
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pl_Bool zb = (zbuf&&TriFace->Material->zBufferable) ? 1 : 0;
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pl_sInt32 U1, V1, U2, V2, dU1=0, dU2=0, dV1=0, dV2=0, dUL=0, dVL=0, UL, VL;
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pl_sInt32 eU1, eV1, eU2, eV2, edU1=0, edU2=0, edV1=0,
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edV2=0, edUL=0, edVL=0, eUL, eVL;
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pl_sInt32 X1, X2, dX1=0, dX2=0, XL1, XL2;
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pl_Float Z1, ZL, dZ1=0, dZ2=0, dZL=0, Z2;
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pl_sInt32 Y1, Y2, Y0, dY;
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Environment = TriFace->Material->Environment;
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Texture = TriFace->Material->Texture;
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if (!Texture || !Environment) return;
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texture = Texture->Data;
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environment = Environment->Data;
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addtable = TriFace->Material->_AddTable;
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remap = TriFace->Material->_ReMapTable;
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MappingV_AND = ((1<<Texture->Height)-1)<<Texture->Width;
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MappingU_AND = (1<<Texture->Width)-1;
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vshift = 16 - Texture->Width;
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eMappingV_AND = ((1<<Environment->Height)-1)<<Environment->Width;
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eMappingU_AND = (1<<Environment->Width)-1;
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evshift = 16 - Environment->Width;
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PUTFACE_SORT_TEX();
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eMappingU1=(pl_sInt32) (TriFace->eMappingU[i0]*Environment->uScale*TriFace->Material->EnvScaling);
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eMappingV1=(pl_sInt32) (TriFace->eMappingV[i0]*Environment->vScale*TriFace->Material->EnvScaling);
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eMappingU2=(pl_sInt32) (TriFace->eMappingU[i1]*Environment->uScale*TriFace->Material->EnvScaling);
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eMappingV2=(pl_sInt32) (TriFace->eMappingV[i1]*Environment->vScale*TriFace->Material->EnvScaling);
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eMappingU3=(pl_sInt32) (TriFace->eMappingU[i2]*Environment->uScale*TriFace->Material->EnvScaling);
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eMappingV3=(pl_sInt32) (TriFace->eMappingV[i2]*Environment->vScale*TriFace->Material->EnvScaling);
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U1 = U2 = MappingU1;
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V1 = V2 = MappingV1;
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eU1 = eU2 = eMappingU1;
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eV1 = eV2 = eMappingV1;
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X2 = X1 = TriFace->Scrx[i0];
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Z2 = Z1 = TriFace->Scrz[i0];
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Y0 = (TriFace->Scry[i0]+(1<<19))>>20;
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Y1 = (TriFace->Scry[i1]+(1<<19))>>20;
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Y2 = (TriFace->Scry[i2]+(1<<19))>>20;
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dY = Y2 - Y0;
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if (dY) {
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dU2 = (MappingU3 - U1) / dY;
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dV2 = (MappingV3 - V1) / dY;
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edU2 = (eMappingU3 - eU1) / dY;
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edV2 = (eMappingV3 - eV1) / dY;
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dX2 = (TriFace->Scrx[i2] - X1) / dY;
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dZ2 = (TriFace->Scrz[i2] - Z1) / dY;
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}
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dY = Y1-Y0;
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if (dY) {
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dX1 = (TriFace->Scrx[i1] - X1) / dY;
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dU1 = (MappingU2 - U1) / dY;
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dV1 = (MappingV2 - V1) / dY;
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edU1 = (eMappingU2 - eU1) / dY;
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edV1 = (eMappingV2 - eV1) / dY;
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dZ1 = (TriFace->Scrz[i1] - Z1) / dY;
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if (dX2 < dX1) {
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dX2 ^= dX1; dX1 ^= dX2; dX2 ^= dX1;
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dU2 ^= dU1; dU1 ^= dU2; dU2 ^= dU1;
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dV2 ^= dV1; dV1 ^= dV2; dV2 ^= dV1;
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edU2 ^= edU1; edU1 ^= edU2; edU2 ^= edU1;
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edV2 ^= edV1; edV1 ^= edV2; edV2 ^= edV1;
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dZL = dZ1; dZ1 = dZ2; dZ2 = dZL;
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stat = 2;
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} else stat = 1;
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} else {
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if (TriFace->Scrx[i1] > X1) {
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X2 = TriFace->Scrx[i1];
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Z2 = TriFace->Scrz[i1];
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U2 = MappingU2;
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V2 = MappingV2;
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eU2 = eMappingU2;
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eV2 = eMappingV2;
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stat = 2|4;
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} else {
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X1 = TriFace->Scrx[i1];
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Z1 = TriFace->Scrz[i1];
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U1 = MappingU2;
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V1 = MappingV2;
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eU1 = eMappingU2;
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eV1 = eMappingV2;
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stat = 1|8;
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}
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}
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gmem += (Y0 * cam->ScreenWidth);
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zbuf += (Y0 * cam->ScreenWidth);
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XL1 = (((dX1-dX2)*dY+(1<<19))>>20);
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if (XL1) {
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dUL = ((dU1-dU2)*dY)/XL1;
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dVL = ((dV1-dV2)*dY)/XL1;
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edUL = ((edU1-edU2)*dY)/XL1;
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edVL = ((edV1-edV2)*dY)/XL1;
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dZL = ((dZ1-dZ2)*dY)/XL1;
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} else {
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XL1 = ((X2-X1+(1<<19))>>20);
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if (XL1) {
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edUL = (eU2-eU1)/XL1;
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edVL = (eV2-eV1)/XL1;
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dUL = (U2-U1)/XL1;
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dVL = (V2-V1)/XL1;
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dZL = (Z2-Z1)/XL1;
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}
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}
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while (Y0 < Y2) {
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if (Y0 == Y1) {
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dY = Y2 - ((TriFace->Scry[i1]+(1<<19))>>20);
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if (dY) {
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if (stat & 1) {
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X1 = TriFace->Scrx[i1];
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dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
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}
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if (stat & 2) {
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X2 = TriFace->Scrx[i1];
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dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
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}
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if (stat & 4) {
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X1 = TriFace->Scrx[i0];
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dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
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}
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if (stat & 8) {
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X2 = TriFace->Scrx[i0];
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dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
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}
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dZ1 = (TriFace->Scrz[i2]-Z1)/dY;
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dV1 = (MappingV3 - V1) / dY;
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dU1 = (MappingU3 - U1) / dY;
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edV1 = (eMappingV3 - eV1) / dY;
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edU1 = (eMappingU3 - eU1) / dY;
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}
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}
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XL1 = (X1+(1<<19))>>20;
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XL2 = (X2+(1<<19))>>20;
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ZL = Z1;
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UL = U1;
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VL = V1;
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eUL = eU1;
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eVL = eV1;
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if ((XL2-XL1) > 0) {
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XL2 -= XL1;
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gmem += XL1;
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zbuf += XL1;
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XL1 += XL2;
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if (zb) do {
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if (*zbuf < ZL) {
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*zbuf = ZL;
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*gmem = remap[addtable[environment[
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((eUL>>16)&eMappingU_AND)+((eVL>>evshift)&eMappingV_AND)]] +
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texture[((UL>>16)&MappingU_AND) +
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((VL>>vshift)&MappingV_AND)]];
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}
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zbuf++;
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gmem++;
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ZL += dZL;
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UL += dUL;
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VL += dVL;
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eUL += edUL;
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eVL += edVL;
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} while (--XL2);
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else do {
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*gmem++ = remap[addtable[environment[
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((eUL>>16)&eMappingU_AND)+((eVL>>evshift)&eMappingV_AND)]] +
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texture[((UL>>16)&MappingU_AND) +
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((VL>>vshift)&MappingV_AND)]];
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UL += dUL;
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VL += dVL;
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eUL += edUL;
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eVL += edVL;
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} while (--XL2);
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gmem -= XL1;
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zbuf -= XL1;
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}
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zbuf += cam->ScreenWidth;
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gmem += cam->ScreenWidth;
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Z1 += dZ1;
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X1 += dX1;
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X2 += dX2;
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U1 += dU1;
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V1 += dV1;
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eU1 += edU1;
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eV1 += edV1;
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Y0++;
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}
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}
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void plPF_TexF(pl_Cam *cam, pl_Face *TriFace) {
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pl_uChar i0, i1, i2;
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pl_uChar *gmem = cam->frameBuffer;
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pl_ZBuffer *zbuf = cam->zBuffer;
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pl_sInt32 MappingU1, MappingU2, MappingU3;
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pl_sInt32 MappingV1, MappingV2, MappingV3;
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pl_sInt32 MappingU_AND, MappingV_AND;
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pl_uChar *texture;
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pl_uChar vshift;
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pl_uInt bc;
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pl_uChar *remap;
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pl_Texture *Texture;
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pl_uChar stat;
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pl_ZBuffer Z1, ZL, dZ1=0, dZL=0, Z2, dZ2=0;
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pl_sInt32 dU1=0, dV1=0, dU2=0, dV2=0, U1, V1, U2, V2;
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pl_sInt32 dUL=0, dVL=0, UL, VL;
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pl_sInt32 X1, X2, dX1=0, dX2=0, XL1, XL2;
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pl_sInt32 Y1, Y2, Y0, dY;
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pl_Bool zb = (zbuf&&TriFace->Material->zBufferable) ? 1 : 0;
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pl_sInt shade;
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if (TriFace->Material->Environment) Texture = TriFace->Material->Environment;
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else Texture = TriFace->Material->Texture;
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if (!Texture) return;
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remap = TriFace->Material->_ReMapTable;
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if (TriFace->Material->_AddTable)
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{
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shade=(pl_sInt)(TriFace->fShade*255.0f);
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if (shade < 0) shade=0;
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if (shade > 255) shade=255;
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bc = TriFace->Material->_AddTable[shade];
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}
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else bc=0;
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texture = Texture->Data;
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vshift = 16 - Texture->Width;
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MappingV_AND = ((1<<Texture->Height)-1)<<Texture->Width;
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MappingU_AND = (1<<Texture->Width)-1;
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if (TriFace->Material->Environment) {
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PUTFACE_SORT_ENV();
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} else {
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PUTFACE_SORT_TEX();
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}
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U1 = U2 = MappingU1;
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V1 = V2 = MappingV1;
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X2 = X1 = TriFace->Scrx[i0];
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Z2 = Z1 = TriFace->Scrz[i0];
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Y0 = (TriFace->Scry[i0]+(1<<19))>>20;
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Y1 = (TriFace->Scry[i1]+(1<<19))>>20;
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Y2 = (TriFace->Scry[i2]+(1<<19))>>20;
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dY = Y2 - Y0;
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if (dY) {
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dX2 = (TriFace->Scrx[i2] - X1) / dY;
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dV2 = (MappingV3 - V1) / dY;
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dU2 = (MappingU3 - U1) / dY;
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dZ2 = (TriFace->Scrz[i2] - Z1) / dY;
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}
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dY = Y1-Y0;
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if (dY) {
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dX1 = (TriFace->Scrx[i1] - X1) / dY;
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dZ1 = (TriFace->Scrz[i1] - Z1) / dY;
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dU1 = (MappingU2 - U1) / dY;
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dV1 = (MappingV2 - V1) / dY;
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if (dX2 < dX1) {
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dX2 ^= dX1; dX1 ^= dX2; dX2 ^= dX1;
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dU2 ^= dU1; dU1 ^= dU2; dU2 ^= dU1;
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dV2 ^= dV1; dV1 ^= dV2; dV2 ^= dV1;
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dZL = dZ1; dZ1 = dZ2; dZ2 = dZL;
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stat = 2;
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} else stat = 1;
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} else {
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if (TriFace->Scrx[i1] > X1) {
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X2 = TriFace->Scrx[i1];
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Z2 = TriFace->Scrz[i1];
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U2 = MappingU2;
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V2 = MappingV2;
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stat = 2|4;
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} else {
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X1 = TriFace->Scrx[i1];
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Z1 = TriFace->Scrz[i1];
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U1 = MappingU2;
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V1 = MappingV2;
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stat = 1|8;
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}
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}
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gmem += (Y0 * cam->ScreenWidth);
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zbuf += (Y0 * cam->ScreenWidth);
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XL1 = (((dX1-dX2)*dY+(1<<19))>>20);
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if (XL1) {
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dUL = ((dU1-dU2)*dY)/XL1;
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dVL = ((dV1-dV2)*dY)/XL1;
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dZL = ((dZ1-dZ2)*dY)/XL1;
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||
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|
} else {
|
||
|
|
XL1 = ((X2-X1+(1<<19))>>20);
|
||
|
|
if (XL1) {
|
||
|
|
dUL = (U2-U1)/XL1;
|
||
|
|
dVL = (V2-V1)/XL1;
|
||
|
|
dZL = (Z2-Z1)/XL1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
while (Y0 < Y2) {
|
||
|
|
if (Y0 == Y1) {
|
||
|
|
dY = Y2 - ((TriFace->Scry[i1]+(1<<19))>>20);
|
||
|
|
if (dY) {
|
||
|
|
if (stat & 1) {
|
||
|
|
X1 = TriFace->Scrx[i1];
|
||
|
|
dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
|
||
|
|
}
|
||
|
|
if (stat & 2) {
|
||
|
|
X2 = TriFace->Scrx[i1];
|
||
|
|
dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
|
||
|
|
}
|
||
|
|
if (stat & 4) {
|
||
|
|
X1 = TriFace->Scrx[i0];
|
||
|
|
dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
|
||
|
|
}
|
||
|
|
if (stat & 8) {
|
||
|
|
X2 = TriFace->Scrx[i0];
|
||
|
|
dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
|
||
|
|
}
|
||
|
|
dZ1 = (TriFace->Scrz[i2]-Z1) / dY;
|
||
|
|
dV1 = (MappingV3 - V1) / dY;
|
||
|
|
dU1 = (MappingU3 - U1) / dY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
XL1 = (X1+(1<<19))>>20;
|
||
|
|
XL2 = (X2+(1<<19))>>20;
|
||
|
|
ZL = Z1;
|
||
|
|
UL = U1;
|
||
|
|
VL = V1;
|
||
|
|
if ((XL2-XL1) > 0) {
|
||
|
|
XL2 -= XL1;
|
||
|
|
gmem += XL1;
|
||
|
|
zbuf += XL1;
|
||
|
|
XL1 += XL2;
|
||
|
|
if (zb) do {
|
||
|
|
if (*zbuf < ZL) {
|
||
|
|
*zbuf = ZL;
|
||
|
|
*gmem = remap[bc + texture[((UL >> 16)&MappingU_AND) +
|
||
|
|
((VL>>vshift)&MappingV_AND)]];
|
||
|
|
}
|
||
|
|
zbuf++;
|
||
|
|
gmem++;
|
||
|
|
ZL += dZL;
|
||
|
|
UL += dUL;
|
||
|
|
VL += dVL;
|
||
|
|
} while (--XL2);
|
||
|
|
else do {
|
||
|
|
*gmem++ = remap[bc + texture[((UL >> 16)&MappingU_AND) +
|
||
|
|
((VL>>vshift)&MappingV_AND)]];
|
||
|
|
UL += dUL;
|
||
|
|
VL += dVL;
|
||
|
|
} while (--XL2);
|
||
|
|
gmem -= XL1;
|
||
|
|
zbuf -= XL1;
|
||
|
|
}
|
||
|
|
zbuf += cam->ScreenWidth;
|
||
|
|
gmem += cam->ScreenWidth;
|
||
|
|
X1 += dX1;
|
||
|
|
X2 += dX2;
|
||
|
|
U1 += dU1;
|
||
|
|
V1 += dV1;
|
||
|
|
Z1 += dZ1;
|
||
|
|
Y0++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void plPF_TexG(pl_Cam *cam, pl_Face *TriFace) {
|
||
|
|
pl_uChar i0, i1, i2;
|
||
|
|
pl_uChar *gmem = cam->frameBuffer;
|
||
|
|
pl_ZBuffer *zbuf = cam->zBuffer;
|
||
|
|
pl_sInt32 MappingU1, MappingU2, MappingU3;
|
||
|
|
pl_sInt32 MappingV1, MappingV2, MappingV3;
|
||
|
|
pl_sInt32 MappingU_AND, MappingV_AND;
|
||
|
|
pl_uChar *texture;
|
||
|
|
pl_uChar *remap;
|
||
|
|
pl_uChar vshift;
|
||
|
|
pl_uInt16 *addtable;
|
||
|
|
pl_Texture *Texture;
|
||
|
|
|
||
|
|
pl_sInt32 U1, V1, U2, V2, dU1=0, dU2=0, dV1=0, dV2=0, dUL=0, dVL=0, UL, VL;
|
||
|
|
pl_sInt32 X1, X2, dX1=0, dX2=0, XL1, XL2;
|
||
|
|
pl_sInt32 C1, C2, dC1=0, dC2=0, CL, dCL=0;
|
||
|
|
pl_ZBuffer Z1, ZL, dZ1=0, dZ2=0, dZL=0, Z2;
|
||
|
|
pl_sInt32 Y1, Y2, Y0, dY;
|
||
|
|
pl_uChar stat;
|
||
|
|
|
||
|
|
pl_Bool zb = (zbuf&&TriFace->Material->zBufferable) ? 1 : 0;
|
||
|
|
|
||
|
|
if (TriFace->Material->Environment) Texture = TriFace->Material->Environment;
|
||
|
|
else Texture = TriFace->Material->Texture;
|
||
|
|
|
||
|
|
if (!Texture) return;
|
||
|
|
remap = TriFace->Material->_ReMapTable;
|
||
|
|
texture = Texture->Data;
|
||
|
|
addtable = TriFace->Material->_AddTable;
|
||
|
|
vshift = 16 - Texture->Width;
|
||
|
|
MappingV_AND = ((1<<Texture->Height)-1)<<Texture->Width;
|
||
|
|
MappingU_AND = (1<<Texture->Width)-1;
|
||
|
|
|
||
|
|
if (TriFace->Material->Environment) {
|
||
|
|
PUTFACE_SORT_ENV();
|
||
|
|
} else {
|
||
|
|
PUTFACE_SORT_TEX();
|
||
|
|
}
|
||
|
|
|
||
|
|
C1 = C2 = TriFace->Shades[i0]*65535.0f;
|
||
|
|
U1 = U2 = MappingU1;
|
||
|
|
V1 = V2 = MappingV1;
|
||
|
|
X2 = X1 = TriFace->Scrx[i0];
|
||
|
|
Z2 = Z1 = TriFace->Scrz[i0];
|
||
|
|
Y0 = (TriFace->Scry[i0]+(1<<19))>>20;
|
||
|
|
Y1 = (TriFace->Scry[i1]+(1<<19))>>20;
|
||
|
|
Y2 = (TriFace->Scry[i2]+(1<<19))>>20;
|
||
|
|
|
||
|
|
dY = Y2 - Y0;
|
||
|
|
if (dY) {
|
||
|
|
dX2 = (TriFace->Scrx[i2] - X1) / dY;
|
||
|
|
dZ2 = (TriFace->Scrz[i2] - Z1) / dY;
|
||
|
|
dC2 = (TriFace->Shades[i2]*65535.0f - C1) / dY;
|
||
|
|
dU2 = (MappingU3 - U1) / dY;
|
||
|
|
dV2 = (MappingV3 - V1) / dY;
|
||
|
|
}
|
||
|
|
dY = Y1-Y0;
|
||
|
|
if (dY) {
|
||
|
|
dX1 = (TriFace->Scrx[i1] - X1) / dY;
|
||
|
|
dZ1 = (TriFace->Scrz[i1] - Z1) / dY;
|
||
|
|
dC1 = (TriFace->Shades[i1]*65535.0f - C1) / dY;
|
||
|
|
dU1 = (MappingU2 - U1) / dY;
|
||
|
|
dV1 = (MappingV2 - V1) / dY;
|
||
|
|
if (dX2 < dX1) {
|
||
|
|
dX2 ^= dX1; dX1 ^= dX2; dX2 ^= dX1;
|
||
|
|
dU2 ^= dU1; dU1 ^= dU2; dU2 ^= dU1;
|
||
|
|
dV2 ^= dV1; dV1 ^= dV2; dV2 ^= dV1;
|
||
|
|
dC2 ^= dC1; dC1 ^= dC2; dC2 ^= dC1;
|
||
|
|
dZL = dZ1; dZ1 = dZ2; dZ2 = dZL;
|
||
|
|
stat = 2;
|
||
|
|
} else stat = 1;
|
||
|
|
} else {
|
||
|
|
if (TriFace->Scrx[i1] > X1) {
|
||
|
|
X2 = TriFace->Scrx[i1];
|
||
|
|
Z2 = TriFace->Scrz[i1];
|
||
|
|
C2 = TriFace->Shades[i1]*65535.0f;
|
||
|
|
U2 = MappingU2;
|
||
|
|
V2 = MappingV2;
|
||
|
|
stat = 2|4;
|
||
|
|
} else {
|
||
|
|
X1 = TriFace->Scrx[i1];
|
||
|
|
Z1 = TriFace->Scrz[i1];
|
||
|
|
C1 = TriFace->Shades[i1]*65535.0f;
|
||
|
|
U1 = MappingU2;
|
||
|
|
V1 = MappingV2;
|
||
|
|
stat = 1|8;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
gmem += (Y0 * cam->ScreenWidth);
|
||
|
|
zbuf += (Y0 * cam->ScreenWidth);
|
||
|
|
|
||
|
|
XL1 = (((dX1-dX2)*dY+(1<<19))>>20);
|
||
|
|
if (XL1) {
|
||
|
|
dUL = ((dU1-dU2)*dY)/XL1;
|
||
|
|
dVL = ((dV1-dV2)*dY)/XL1;
|
||
|
|
if (zb) dZL = ((dZ1-dZ2)*dY)/XL1;
|
||
|
|
dCL = ((dC1-dC2)*dY)/XL1;
|
||
|
|
} else {
|
||
|
|
XL1 = ((X2-X1+(1<<19))>>20);
|
||
|
|
if (XL1) {
|
||
|
|
dUL = (U2-U1)/XL1;
|
||
|
|
dVL = (V2-V1)/XL1;
|
||
|
|
if (zb) dZL = (Z2-Z1)/XL1;
|
||
|
|
dCL = (C2-C1)/(XL1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while (Y0 < Y2) {
|
||
|
|
if (Y0 == Y1) {
|
||
|
|
dY = Y2 - ((TriFace->Scry[i1]+(1<<19))>>20);
|
||
|
|
if (dY) {
|
||
|
|
if (stat & 1) {
|
||
|
|
X1 = TriFace->Scrx[i1];
|
||
|
|
dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
|
||
|
|
}
|
||
|
|
if (stat & 2) {
|
||
|
|
X2 = TriFace->Scrx[i1];
|
||
|
|
dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
|
||
|
|
}
|
||
|
|
if (stat & 4) {
|
||
|
|
X1 = TriFace->Scrx[i0];
|
||
|
|
dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
|
||
|
|
}
|
||
|
|
if (stat & 8) {
|
||
|
|
X2 = TriFace->Scrx[i0];
|
||
|
|
dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
|
||
|
|
}
|
||
|
|
dZ1 = (TriFace->Scrz[i2]-Z1)/dY;
|
||
|
|
dV1 = (MappingV3 - V1) / dY;
|
||
|
|
dU1 = (MappingU3 - U1) / dY;
|
||
|
|
dC1 = (TriFace->Shades[i2]*65535.0f-C1)/dY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
XL1 = (X1+(1<<19))>>20;
|
||
|
|
XL2 = (X2+(1<<19))>>20;
|
||
|
|
CL = C1;
|
||
|
|
ZL = Z1;
|
||
|
|
UL = U1;
|
||
|
|
VL = V1;
|
||
|
|
if ((XL2-XL1) > 0) {
|
||
|
|
XL2 -= XL1;
|
||
|
|
gmem += XL1;
|
||
|
|
zbuf += XL1;
|
||
|
|
XL1 += XL2;
|
||
|
|
if (zb) do {
|
||
|
|
if (*zbuf < ZL) {
|
||
|
|
int av;
|
||
|
|
if (CL < 0) av=addtable[0];
|
||
|
|
else if (CL > (255<<8)) av=addtable[255];
|
||
|
|
else av=addtable[CL>>8];
|
||
|
|
*zbuf = ZL;
|
||
|
|
*gmem = remap[av +
|
||
|
|
texture[((UL>>16)&MappingU_AND) +
|
||
|
|
((VL>>vshift)&MappingV_AND)]];
|
||
|
|
}
|
||
|
|
zbuf++;
|
||
|
|
gmem++;
|
||
|
|
ZL += dZL;
|
||
|
|
CL += dCL;
|
||
|
|
UL += dUL;
|
||
|
|
VL += dVL;
|
||
|
|
} while (--XL2);
|
||
|
|
else do {
|
||
|
|
int av;
|
||
|
|
if (CL < 0) av=addtable[0];
|
||
|
|
else if (CL > (255<<8)) av=addtable[255];
|
||
|
|
else av=addtable[CL>>8];
|
||
|
|
*gmem++ = remap[av +
|
||
|
|
texture[((UL>>16)&MappingU_AND) +
|
||
|
|
((VL>>vshift)&MappingV_AND)]];
|
||
|
|
CL += dCL;
|
||
|
|
UL += dUL;
|
||
|
|
VL += dVL;
|
||
|
|
} while (--XL2);
|
||
|
|
gmem -= XL1;
|
||
|
|
zbuf -= XL1;
|
||
|
|
}
|
||
|
|
zbuf += cam->ScreenWidth;
|
||
|
|
gmem += cam->ScreenWidth;
|
||
|
|
Z1 += dZ1;
|
||
|
|
X1 += dX1;
|
||
|
|
X2 += dX2;
|
||
|
|
C1 += dC1;
|
||
|
|
U1 += dU1;
|
||
|
|
V1 += dV1;
|
||
|
|
Y0++;
|
||
|
|
}
|
||
|
|
}
|