void CTRTextureGouraudAddNoZ2::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
{
// sort on height, y
if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
if ( F32_A_GREATER_B ( b->Pos.y , c->Pos.y ) ) swapVertexPointer(&b, &c);
if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
const f32 ca = c->Pos.y - a->Pos.y;
const f32 ba = b->Pos.y - a->Pos.y;
const f32 cb = c->Pos.y - b->Pos.y;
// calculate delta y of the edges
scan.invDeltaY[0] = core::reciprocal( ca );
scan.invDeltaY[1] = core::reciprocal( ba );
scan.invDeltaY[2] = core::reciprocal( cb );
if ( F32_LOWER_EQUAL_0 ( scan.invDeltaY[0] ) )
return;
// find if the major edge is left or right aligned
f32 temp[4];
temp[0] = a->Pos.x - c->Pos.x;
temp[1] = -ca;
temp[2] = b->Pos.x - a->Pos.x;
temp[3] = ba;
scan.left = ( temp[0] * temp[3] - temp[1] * temp[2] ) > 0.f ? 0 : 1;
scan.right = 1 - scan.left;
// calculate slopes for the major edge
scan.slopeX[0] = (c->Pos.x - a->Pos.x) * scan.invDeltaY[0];
scan.x[0] = a->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[0] = (c->Pos.z - a->Pos.z) * scan.invDeltaY[0];
scan.z[0] = a->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[0] = (c->Pos.w - a->Pos.w) * scan.invDeltaY[0];
scan.w[0] = a->Pos.w;
#endif
#ifdef IPOL_C0
scan.slopeC[0] = (c->Color[0] - a->Color[0]) * scan.invDeltaY[0];
scan.c[0] = a->Color[0];
#endif
#ifdef IPOL_T0
scan.slopeT[0][0] = (c->Tex[0] - a->Tex[0]) * scan.invDeltaY[0];
scan.t[0][0] = a->Tex[0];
#endif
#ifdef IPOL_T1
scan.slopeT[1][0] = (c->Tex[1] - a->Tex[1]) * scan.invDeltaY[0];
scan.t[1][0] = a->Tex[1];
#endif
// top left fill convention y run
s32 yStart;
s32 yEnd;
#ifdef SUBTEXEL
f32 subPixel;
#endif
// rasterize upper sub-triangle
if ( (f32) 0.0 != scan.invDeltaY[1] )
{
// calculate slopes for top edge
scan.slopeX[1] = (b->Pos.x - a->Pos.x) * scan.invDeltaY[1];
scan.x[1] = a->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[1] = (b->Pos.z - a->Pos.z) * scan.invDeltaY[1];
scan.z[1] = a->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[1] = (b->Pos.w - a->Pos.w) * scan.invDeltaY[1];
scan.w[1] = a->Pos.w;
#endif
#ifdef IPOL_C0
scan.slopeC[1] = (b->Color[0] - a->Color[0]) * scan.invDeltaY[1];
scan.c[1] = a->Color[0];
#endif
#ifdef IPOL_T0
scan.slopeT[0][1] = (b->Tex[0] - a->Tex[0]) * scan.invDeltaY[1];
scan.t[0][1] = a->Tex[0];
#endif
#ifdef IPOL_T1
scan.slopeT[1][1] = (b->Tex[1] - a->Tex[1]) * scan.invDeltaY[1];
scan.t[1][1] = a->Tex[1];
#endif
// apply top-left fill convention, top part
yStart = core::ceil32( a->Pos.y );
yEnd = core::ceil32( b->Pos.y ) - 1;
#ifdef SUBTEXEL
subPixel = ( (f32) yStart ) - a->Pos.y;
// correct to pixel center
scan.x[0] += scan.slopeX[0] * subPixel;
scan.x[1] += scan.slopeX[1] * subPixel;
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0] * subPixel;
scan.z[1] += scan.slopeZ[1] * subPixel;
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0] * subPixel;
scan.w[1] += scan.slopeW[1] * subPixel;
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0] * subPixel;
scan.c[1] += scan.slopeC[1] * subPixel;
#endif
#ifdef IPOL_T0
scan.t[0][0] += scan.slopeT[0][0] * subPixel;
scan.t[0][1] += scan.slopeT[0][1] * subPixel;
#endif
#ifdef IPOL_T1
scan.t[1][0] += scan.slopeT[1][0] * subPixel;
scan.t[1][1] += scan.slopeT[1][1] * subPixel;
#endif
#endif
// rasterize the edge scanlines
for( line.y = yStart; line.y <= yEnd; ++line.y)
{
line.x[scan.left] = scan.x[0];
line.x[scan.right] = scan.x[1];
#ifdef IPOL_Z
line.z[scan.left] = scan.z[0];
line.z[scan.right] = scan.z[1];
#endif
#ifdef IPOL_W
line.w[scan.left] = scan.w[0];
line.w[scan.right] = scan.w[1];
#endif
#ifdef IPOL_C0
line.c[scan.left] = scan.c[0];
line.c[scan.right] = scan.c[1];
#endif
#ifdef IPOL_T0
line.t[0][scan.left] = scan.t[0][0];
line.t[0][scan.right] = scan.t[0][1];
#endif
#ifdef IPOL_T1
line.t[1][scan.left] = scan.t[1][0];
line.t[1][scan.right] = scan.t[1][1];
#endif
// render a scanline
scanline_bilinear ();
scan.x[0] += scan.slopeX[0];
scan.x[1] += scan.slopeX[1];
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0];
scan.z[1] += scan.slopeZ[1];
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0];
scan.w[1] += scan.slopeW[1];
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0];
scan.c[1] += scan.slopeC[1];
#endif
#ifdef IPOL_T0
scan.t[0][0] += scan.slopeT[0][0];
scan.t[0][1] += scan.slopeT[0][1];
#endif
#ifdef IPOL_T1
scan.t[1][0] += scan.slopeT[1][0];
scan.t[1][1] += scan.slopeT[1][1];
#endif
}
}
// rasterize lower sub-triangle
if ( (f32) 0.0 != scan.invDeltaY[2] )
{
// advance to middle point
if( (f32) 0.0 != scan.invDeltaY[1] )
{
temp[0] = b->Pos.y - a->Pos.y; // dy
scan.x[0] = a->Pos.x + scan.slopeX[0] * temp[0];
#ifdef IPOL_Z
scan.z[0] = a->Pos.z + scan.slopeZ[0] * temp[0];
#endif
#ifdef IPOL_W
scan.w[0] = a->Pos.w + scan.slopeW[0] * temp[0];
#endif
#ifdef IPOL_C0
scan.c[0] = a->Color[0] + scan.slopeC[0] * temp[0];
#endif
#ifdef IPOL_T0
scan.t[0][0] = a->Tex[0] + scan.slopeT[0][0] * temp[0];
#endif
#ifdef IPOL_T1
scan.t[1][0] = a->Tex[1] + scan.slopeT[1][0] * temp[0];
#endif
}
// calculate slopes for bottom edge
scan.slopeX[1] = (c->Pos.x - b->Pos.x) * scan.invDeltaY[2];
scan.x[1] = b->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[1] = (c->Pos.z - b->Pos.z) * scan.invDeltaY[2];
scan.z[1] = b->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[1] = (c->Pos.w - b->Pos.w) * scan.invDeltaY[2];
scan.w[1] = b->Pos.w;
#endif
#ifdef IPOL_C0
scan.slopeC[1] = (c->Color[0] - b->Color[0]) * scan.invDeltaY[2];
scan.c[1] = b->Color[0];
#endif
#ifdef IPOL_T0
scan.slopeT[0][1] = (c->Tex[0] - b->Tex[0]) * scan.invDeltaY[2];
scan.t[0][1] = b->Tex[0];
#endif
#ifdef IPOL_T1
scan.slopeT[1][1] = (c->Tex[1] - b->Tex[1]) * scan.invDeltaY[2];
scan.t[1][1] = b->Tex[1];
#endif
// apply top-left fill convention, top part
yStart = core::ceil32( b->Pos.y );
yEnd = core::ceil32( c->Pos.y ) - 1;
#ifdef SUBTEXEL
subPixel = ( (f32) yStart ) - b->Pos.y;
// correct to pixel center
scan.x[0] += scan.slopeX[0] * subPixel;
scan.x[1] += scan.slopeX[1] * subPixel;
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0] * subPixel;
scan.z[1] += scan.slopeZ[1] * subPixel;
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0] * subPixel;
scan.w[1] += scan.slopeW[1] * subPixel;
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0] * subPixel;
scan.c[1] += scan.slopeC[1] * subPixel;
#endif
#ifdef IPOL_T0
scan.t[0][0] += scan.slopeT[0][0] * subPixel;
scan.t[0][1] += scan.slopeT[0][1] * subPixel;
#endif
#ifdef IPOL_T1
scan.t[1][0] += scan.slopeT[1][0] * subPixel;
scan.t[1][1] += scan.slopeT[1][1] * subPixel;
#endif
#endif
// rasterize the edge scanlines
for( line.y = yStart; line.y <= yEnd; ++line.y)
{
line.x[scan.left] = scan.x[0];
line.x[scan.right] = scan.x[1];
#ifdef IPOL_Z
line.z[scan.left] = scan.z[0];
line.z[scan.right] = scan.z[1];
#endif
#ifdef IPOL_W
line.w[scan.left] = scan.w[0];
line.w[scan.right] = scan.w[1];
#endif
#ifdef IPOL_C0
line.c[scan.left] = scan.c[0];
line.c[scan.right] = scan.c[1];
#endif
#ifdef IPOL_T0
line.t[0][scan.left] = scan.t[0][0];
line.t[0][scan.right] = scan.t[0][1];
#endif
#ifdef IPOL_T1
line.t[1][scan.left] = scan.t[1][0];
line.t[1][scan.right] = scan.t[1][1];
#endif
// render a scanline
scanline_bilinear ( );
scan.x[0] += scan.slopeX[0];
scan.x[1] += scan.slopeX[1];
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0];
scan.z[1] += scan.slopeZ[1];
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0];
scan.w[1] += scan.slopeW[1];
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0];
scan.c[1] += scan.slopeC[1];
#endif
#ifdef IPOL_T0
scan.t[0][0] += scan.slopeT[0][0];
scan.t[0][1] += scan.slopeT[0][1];
#endif
#ifdef IPOL_T1
scan.t[1][0] += scan.slopeT[1][0];
scan.t[1][1] += scan.slopeT[1][1];
#endif
}
}
}
void CTRTextureLightMap2_Add::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
{
// sort on height, y
if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
if ( F32_A_GREATER_B ( a->Pos.y , c->Pos.y ) ) swapVertexPointer(&a, &c);
if ( F32_A_GREATER_B ( b->Pos.y , c->Pos.y ) ) swapVertexPointer(&b, &c);
// calculate delta y of the edges
scan.invDeltaY[0] = core::reciprocal ( c->Pos.y - a->Pos.y );
scan.invDeltaY[1] = core::reciprocal ( b->Pos.y - a->Pos.y );
scan.invDeltaY[2] = core::reciprocal ( c->Pos.y - b->Pos.y );
if ( F32_LOWER_EQUAL_0 ( scan.invDeltaY[0] ) )
return;
// find if the major edge is left or right aligned
f32 temp[4];
temp[0] = a->Pos.x - c->Pos.x;
temp[1] = a->Pos.y - c->Pos.y;
temp[2] = b->Pos.x - a->Pos.x;
temp[3] = b->Pos.y - a->Pos.y;
scan.left = ( temp[0] * temp[3] - temp[1] * temp[2] ) > (f32) 0.0 ? 0 : 1;
scan.right = 1 - scan.left;
// calculate slopes for the major edge
scan.slopeX[0] = (c->Pos.x - a->Pos.x) * scan.invDeltaY[0];
scan.x[0] = a->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[0] = (c->Pos.z - a->Pos.z) * scan.invDeltaY[0];
scan.z[0] = a->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[0] = (c->Pos.w - a->Pos.w) * scan.invDeltaY[0];
scan.w[0] = a->Pos.w;
#endif
#ifdef IPOL_C0
scan.slopeC[0] = (c->Color[0] - a->Color[0]) * scan.invDeltaY[0];
scan.c[0] = a->Color[0];
#endif
#ifdef IPOL_T0
scan.slopeT0[0] = (c->Tex[0] - a->Tex[0]) * scan.invDeltaY[0];
scan.t0[0] = a->Tex[0];
#endif
#ifdef IPOL_T1
scan.slopeT1[0] = (c->Tex[1] - a->Tex[1]) * scan.invDeltaY[0];
scan.t1[0] = a->Tex[1];
#endif
// top left fill convention y run
s32 yStart;
s32 yEnd;
#ifdef SUBTEXEL
f32 subPixel;
#endif
// query access to TexMaps
lockedSurface = (tVideoSample*)RenderTarget->lock();
#ifdef USE_ZBUFFER
lockedZBuffer = ZBuffer->lock();
#endif
#ifdef IPOL_T0
IT[0].data = (tVideoSample*)IT[0].Texture->lock();
#endif
#ifdef IPOL_T1
IT[1].data = (tVideoSample*)IT[1].Texture->lock();
#endif
// rasterize upper sub-triangle
if ( (f32) 0.0 != scan.invDeltaY[1] )
{
// calculate slopes for top edge
scan.slopeX[1] = (b->Pos.x - a->Pos.x) * scan.invDeltaY[1];
scan.x[1] = a->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[1] = (b->Pos.z - a->Pos.z) * scan.invDeltaY[1];
scan.z[1] = a->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[1] = (b->Pos.w - a->Pos.w) * scan.invDeltaY[1];
scan.w[1] = a->Pos.w;
#endif
#ifdef IPOL_C0
scan.slopeC[1] = (b->Color[0] - a->Color[0]) * scan.invDeltaY[1];
scan.c[1] = a->Color[0];
#endif
#ifdef IPOL_T0
scan.slopeT0[1] = (b->Tex[0] - a->Tex[0]) * scan.invDeltaY[1];
scan.t0[1] = a->Tex[0];
#endif
#ifdef IPOL_T1
scan.slopeT1[1] = (b->Tex[1] - a->Tex[1]) * scan.invDeltaY[1];
scan.t1[1] = a->Tex[1];
#endif
// apply top-left fill convention, top part
yStart = core::ceil32( a->Pos.y );
yEnd = core::ceil32( b->Pos.y ) - 1;
#ifdef SUBTEXEL
subPixel = ( (f32) yStart ) - a->Pos.y;
// correct to pixel center
scan.x[0] += scan.slopeX[0] * subPixel;
scan.x[1] += scan.slopeX[1] * subPixel;
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0] * subPixel;
scan.z[1] += scan.slopeZ[1] * subPixel;
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0] * subPixel;
scan.w[1] += scan.slopeW[1] * subPixel;
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0] * subPixel;
scan.c[1] += scan.slopeC[1] * subPixel;
#endif
#ifdef IPOL_T0
scan.t0[0] += scan.slopeT0[0] * subPixel;
scan.t0[1] += scan.slopeT0[1] * subPixel;
#endif
#ifdef IPOL_T1
scan.t1[0] += scan.slopeT1[0] * subPixel;
scan.t1[1] += scan.slopeT1[1] * subPixel;
#endif
#endif
// rasterize the edge scanlines
for( line.y = yStart; line.y <= yEnd; ++line.y)
{
line.x[scan.left] = scan.x[0];
line.x[scan.right] = scan.x[1];
#ifdef IPOL_Z
line.z[scan.left] = scan.z[0];
line.z[scan.right] = scan.z[1];
#endif
#ifdef IPOL_W
line.w[scan.left] = scan.w[0];
line.w[scan.right] = scan.w[1];
#endif
#ifdef IPOL_C0
line.c[scan.left] = scan.c[0];
line.c[scan.right] = scan.c[1];
#endif
#ifdef IPOL_T0
line.t0[scan.left] = scan.t0[0];
line.t0[scan.right] = scan.t0[1];
#endif
#ifdef IPOL_T1
line.t1[scan.left] = scan.t1[0];
line.t1[scan.right] = scan.t1[1];
#endif
// render a scanline
scanline_bilinear ();
scan.x[0] += scan.slopeX[0];
scan.x[1] += scan.slopeX[1];
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0];
scan.z[1] += scan.slopeZ[1];
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0];
scan.w[1] += scan.slopeW[1];
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0];
scan.c[1] += scan.slopeC[1];
#endif
#ifdef IPOL_T0
scan.t0[0] += scan.slopeT0[0];
scan.t0[1] += scan.slopeT0[1];
#endif
#ifdef IPOL_T1
scan.t1[0] += scan.slopeT1[0];
scan.t1[1] += scan.slopeT1[1];
#endif
}
}
// rasterize lower sub-triangle
if ( (f32) 0.0 != scan.invDeltaY[2] )
{
// advance to middle point
if( (f32) 0.0 != scan.invDeltaY[1] )
{
temp[0] = b->Pos.y - a->Pos.y; // dy
scan.x[0] = a->Pos.x + scan.slopeX[0] * temp[0];
#ifdef IPOL_Z
scan.z[0] = a->Pos.z + scan.slopeZ[0] * temp[0];
#endif
#ifdef IPOL_W
scan.w[0] = a->Pos.w + scan.slopeW[0] * temp[0];
#endif
#ifdef IPOL_C0
scan.c[0] = a->Color[0] + scan.slopeC[0] * temp[0];
#endif
#ifdef IPOL_T0
scan.t0[0] = a->Tex[0] + scan.slopeT0[0] * temp[0];
#endif
#ifdef IPOL_T1
scan.t1[0] = a->Tex[1] + scan.slopeT1[0] * temp[0];
#endif
}
// calculate slopes for bottom edge
scan.slopeX[1] = (c->Pos.x - b->Pos.x) * scan.invDeltaY[2];
scan.x[1] = b->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[1] = (c->Pos.z - b->Pos.z) * scan.invDeltaY[2];
scan.z[1] = b->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[1] = (c->Pos.w - b->Pos.w) * scan.invDeltaY[2];
scan.w[1] = b->Pos.w;
#endif
#ifdef IPOL_C0
scan.slopeC[1] = (c->Color[0] - b->Color[0]) * scan.invDeltaY[2];
scan.c[1] = b->Color[0];
#endif
#ifdef IPOL_T0
scan.slopeT0[1] = (c->Tex[0] - b->Tex[0]) * scan.invDeltaY[2];
scan.t0[1] = b->Tex[0];
#endif
#ifdef IPOL_T1
scan.slopeT1[1] = (c->Tex[1] - b->Tex[1]) * scan.invDeltaY[2];
scan.t1[1] = b->Tex[1];
#endif
// apply top-left fill convention, top part
yStart = core::ceil32( b->Pos.y );
yEnd = core::ceil32( c->Pos.y ) - 1;
#ifdef SUBTEXEL
subPixel = ( (f32) yStart ) - b->Pos.y;
// correct to pixel center
scan.x[0] += scan.slopeX[0] * subPixel;
scan.x[1] += scan.slopeX[1] * subPixel;
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0] * subPixel;
scan.z[1] += scan.slopeZ[1] * subPixel;
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0] * subPixel;
scan.w[1] += scan.slopeW[1] * subPixel;
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0] * subPixel;
scan.c[1] += scan.slopeC[1] * subPixel;
#endif
#ifdef IPOL_T0
scan.t0[0] += scan.slopeT0[0] * subPixel;
scan.t0[1] += scan.slopeT0[1] * subPixel;
#endif
#ifdef IPOL_T1
scan.t1[0] += scan.slopeT1[0] * subPixel;
scan.t1[1] += scan.slopeT1[1] * subPixel;
#endif
#endif
// rasterize the edge scanlines
for( line.y = yStart; line.y <= yEnd; ++line.y)
{
line.x[scan.left] = scan.x[0];
line.x[scan.right] = scan.x[1];
#ifdef IPOL_Z
line.z[scan.left] = scan.z[0];
line.z[scan.right] = scan.z[1];
#endif
#ifdef IPOL_W
line.w[scan.left] = scan.w[0];
line.w[scan.right] = scan.w[1];
#endif
#ifdef IPOL_C0
line.c[scan.left] = scan.c[0];
line.c[scan.right] = scan.c[1];
#endif
#ifdef IPOL_T0
line.t0[scan.left] = scan.t0[0];
line.t0[scan.right] = scan.t0[1];
#endif
#ifdef IPOL_T1
line.t1[scan.left] = scan.t1[0];
line.t1[scan.right] = scan.t1[1];
#endif
// render a scanline
scanline_bilinear ();
scan.x[0] += scan.slopeX[0];
scan.x[1] += scan.slopeX[1];
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0];
scan.z[1] += scan.slopeZ[1];
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0];
scan.w[1] += scan.slopeW[1];
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0];
scan.c[1] += scan.slopeC[1];
#endif
#ifdef IPOL_T0
scan.t0[0] += scan.slopeT0[0];
scan.t0[1] += scan.slopeT0[1];
#endif
#ifdef IPOL_T1
scan.t1[0] += scan.slopeT1[0];
scan.t1[1] += scan.slopeT1[1];
#endif
}
}
RenderTarget->unlock();
#ifdef USE_ZBUFFER
ZBuffer->unlock();
#endif
#ifdef IPOL_T0
IT[0].Texture->unlock();
#endif
#ifdef IPOL_T1
IT[1].Texture->unlock();
#endif
}
void CTRTextureDetailMap2::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
{
sScanConvertData scan;
sScanLineData line;
// sort on height, y
if ( a->Pos.y > b->Pos.y ) swapVertices(&a, &b);
if ( a->Pos.y > c->Pos.y ) swapVertices(&a, &c);
if ( b->Pos.y > c->Pos.y ) swapVertices(&b, &c);
// calculate delta y of the edges
scan.invDeltaY[0] = c->Pos.y - a->Pos.y;
scan.invDeltaY[1] = b->Pos.y - a->Pos.y;
scan.invDeltaY[2] = c->Pos.y - b->Pos.y;
scan.invDeltaY[0] = inverse32 ( scan.invDeltaY[0] );
scan.invDeltaY[1] = inverse32 ( scan.invDeltaY[1] );
scan.invDeltaY[2] = inverse32 ( scan.invDeltaY[2] );
if ( (f32) 0.0 == scan.invDeltaY[0] )
return;
// find if the major edge is left or right aligned
f32 temp[4];
temp[0] = a->Pos.x - c->Pos.x;
temp[1] = a->Pos.y - c->Pos.y;
temp[2] = b->Pos.x - a->Pos.x;
temp[3] = b->Pos.y - a->Pos.y;
scan.left = ( temp[0] * temp[3] - temp[1] * temp[2] ) > (f32) 0.0 ? 0 : 1;
scan.right = 1 - scan.left;
// calculate slopes for the major edge
scan.slopeX[0] = (c->Pos.x - a->Pos.x) * scan.invDeltaY[0];
scan.x[0] = a->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[0] = (c->Pos.z - a->Pos.z) * scan.invDeltaY[0];
scan.z[0] = a->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[0] = (c->Pos.w - a->Pos.w) * scan.invDeltaY[0];
scan.w[0] = a->Pos.w;
#endif
#ifdef IPOL_C
scan.slopeC[0] = (c->Color - a->Color) * scan.invDeltaY[0];
scan.c[0] = a->Color;
#endif
#ifdef IPOL_T0
scan.slopeT0[0] = (c->Tex0 - a->Tex0) * scan.invDeltaY[0];
scan.t0[0] = a->Tex0;
#endif
#ifdef IPOL_T1
scan.slopeT1[0] = (c->Tex1 - a->Tex1) * scan.invDeltaY[0];
scan.t1[0] = a->Tex1;
#endif
// top left fill convention y run
s32 yStart;
s32 yEnd;
s32 y;
#ifdef SUBTEXEL
f32 subPixel;
#endif
lockedSurface = (tVideoSample*)RenderTarget->lock();
#ifdef IPOL_Z
lockedZBuffer = ZBuffer->lock();
#endif
#ifdef IPOL_T0
IT[0].data = (tVideoSample*)IT[0].Texture->lock();
#endif
#ifdef IPOL_T1
IT[1].data = (tVideoSample*)IT[1].Texture->lock();
#endif
// rasterize upper sub-triangle
if ( (f32) 0.0 != scan.invDeltaY[1] )
{
// calculate slopes for top edge
scan.slopeX[1] = (b->Pos.x - a->Pos.x) * scan.invDeltaY[1];
scan.x[1] = a->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[1] = (b->Pos.z - a->Pos.z) * scan.invDeltaY[1];
scan.z[1] = a->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[1] = (b->Pos.w - a->Pos.w) * scan.invDeltaY[1];
scan.w[1] = a->Pos.w;
#endif
#ifdef IPOL_C
scan.slopeC[1] = (b->Color - a->Color) * scan.invDeltaY[1];
scan.c[1] = a->Color;
#endif
#ifdef IPOL_T0
scan.slopeT0[1] = (b->Tex0 - a->Tex0) * scan.invDeltaY[1];
scan.t0[1] = a->Tex0;
#endif
#ifdef IPOL_T1
scan.slopeT1[1] = (b->Tex1 - a->Tex1) * scan.invDeltaY[1];
scan.t1[1] = a->Tex1;
#endif
// apply top-left fill convention, top part
yStart = ceil32( a->Pos.y );
yEnd = ceil32( b->Pos.y ) - 1;
#ifdef SUBTEXEL
subPixel = ( (f32) yStart ) - a->Pos.y;
// correct to pixel center
scan.x[0] += scan.slopeX[0] * subPixel;
scan.x[1] += scan.slopeX[1] * subPixel;
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0] * subPixel;
scan.z[1] += scan.slopeZ[1] * subPixel;
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0] * subPixel;
scan.w[1] += scan.slopeW[1] * subPixel;
#endif
#ifdef IPOL_C
scan.c[0] += scan.slopeC[0] * subPixel;
scan.c[1] += scan.slopeC[1] * subPixel;
#endif
#ifdef IPOL_T0
scan.t0[0] += scan.slopeT0[0] * subPixel;
scan.t0[1] += scan.slopeT0[1] * subPixel;
#endif
#ifdef IPOL_T1
scan.t1[0] += scan.slopeT1[0] * subPixel;
scan.t1[1] += scan.slopeT1[1] * subPixel;
#endif
#endif
// rasterize the edge scanlines
for( y = yStart; y <= yEnd; ++y)
{
line.y = y;
line.x[scan.left] = scan.x[0];
line.x[scan.right] = scan.x[1];
#ifdef IPOL_Z
line.z[scan.left] = scan.z[0];
line.z[scan.right] = scan.z[1];
#endif
#ifdef IPOL_W
line.w[scan.left] = scan.w[0];
line.w[scan.right] = scan.w[1];
#endif
#ifdef IPOL_C
line.c[scan.left] = scan.c[0];
line.c[scan.right] = scan.c[1];
#endif
#ifdef IPOL_T0
line.t0[scan.left] = scan.t0[0];
line.t0[scan.right] = scan.t0[1];
#endif
#ifdef IPOL_T1
line.t1[scan.left] = scan.t1[0];
line.t1[scan.right] = scan.t1[1];
#endif
// render a scanline
scanline_bilinear ( &line );
scan.x[0] += scan.slopeX[0];
scan.x[1] += scan.slopeX[1];
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0];
scan.z[1] += scan.slopeZ[1];
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0];
scan.w[1] += scan.slopeW[1];
#endif
#ifdef IPOL_C
scan.c[0] += scan.slopeC[0];
scan.c[1] += scan.slopeC[1];
#endif
#ifdef IPOL_T0
scan.t0[0] += scan.slopeT0[0];
scan.t0[1] += scan.slopeT0[1];
#endif
#ifdef IPOL_T1
scan.t1[0] += scan.slopeT1[0];
scan.t1[1] += scan.slopeT1[1];
#endif
}
}
// rasterize lower sub-triangle
if ( (f32) 0.0 != scan.invDeltaY[2] )
{
// advance to middle point
if( (f32) 0.0 != scan.invDeltaY[1] )
{
temp[0] = b->Pos.y - a->Pos.y; // dy
scan.x[0] = a->Pos.x + scan.slopeX[0] * temp[0];
#ifdef IPOL_Z
scan.z[0] = a->Pos.z + scan.slopeZ[0] * temp[0];
#endif
#ifdef IPOL_W
scan.w[0] = a->Pos.w + scan.slopeW[0] * temp[0];
#endif
#ifdef IPOL_C
scan.c[0] = a->Color + scan.slopeC[0] * temp[0];
#endif
#ifdef IPOL_T0
scan.t0[0] = a->Tex0 + scan.slopeT0[0] * temp[0];
#endif
#ifdef IPOL_T1
scan.t1[0] = a->Tex1 + scan.slopeT1[0] * temp[0];
#endif
}
// calculate slopes for bottom edge
scan.slopeX[1] = (c->Pos.x - b->Pos.x) * scan.invDeltaY[2];
scan.x[1] = b->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[1] = (c->Pos.z - b->Pos.z) * scan.invDeltaY[2];
scan.z[1] = b->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[1] = (c->Pos.w - b->Pos.w) * scan.invDeltaY[2];
scan.w[1] = b->Pos.w;
#endif
#ifdef IPOL_C
scan.slopeC[1] = (c->Color - b->Color) * scan.invDeltaY[2];
scan.c[1] = b->Color;
#endif
#ifdef IPOL_T0
scan.slopeT0[1] = (c->Tex0 - b->Tex0) * scan.invDeltaY[2];
scan.t0[1] = b->Tex0;
#endif
#ifdef IPOL_T1
scan.slopeT1[1] = (c->Tex1 - b->Tex1) * scan.invDeltaY[2];
scan.t1[1] = b->Tex1;
#endif
// apply top-left fill convention, top part
yStart = ceil32( b->Pos.y );
yEnd = ceil32( c->Pos.y ) - 1;
#ifdef SUBTEXEL
subPixel = ( (f32) yStart ) - b->Pos.y;
// correct to pixel center
scan.x[0] += scan.slopeX[0] * subPixel;
scan.x[1] += scan.slopeX[1] * subPixel;
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0] * subPixel;
scan.z[1] += scan.slopeZ[1] * subPixel;
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0] * subPixel;
scan.w[1] += scan.slopeW[1] * subPixel;
#endif
#ifdef IPOL_C
scan.c[0] += scan.slopeC[0] * subPixel;
scan.c[1] += scan.slopeC[1] * subPixel;
#endif
#ifdef IPOL_T0
scan.t0[0] += scan.slopeT0[0] * subPixel;
scan.t0[1] += scan.slopeT0[1] * subPixel;
#endif
#ifdef IPOL_T1
scan.t1[0] += scan.slopeT1[0] * subPixel;
scan.t1[1] += scan.slopeT1[1] * subPixel;
#endif
#endif
// rasterize the edge scanlines
for( y = yStart; y <= yEnd; ++y)
{
line.y = y;
line.x[scan.left] = scan.x[0];
line.x[scan.right] = scan.x[1];
#ifdef IPOL_Z
line.z[scan.left] = scan.z[0];
line.z[scan.right] = scan.z[1];
#endif
#ifdef IPOL_W
line.w[scan.left] = scan.w[0];
line.w[scan.right] = scan.w[1];
#endif
#ifdef IPOL_C
line.c[scan.left] = scan.c[0];
line.c[scan.right] = scan.c[1];
#endif
#ifdef IPOL_T0
line.t0[scan.left] = scan.t0[0];
line.t0[scan.right] = scan.t0[1];
#endif
#ifdef IPOL_T1
line.t1[scan.left] = scan.t1[0];
line.t1[scan.right] = scan.t1[1];
#endif
// render a scanline
scanline_bilinear ( &line );
scan.x[0] += scan.slopeX[0];
scan.x[1] += scan.slopeX[1];
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0];
scan.z[1] += scan.slopeZ[1];
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0];
scan.w[1] += scan.slopeW[1];
#endif
#ifdef IPOL_C
scan.c[0] += scan.slopeC[0];
scan.c[1] += scan.slopeC[1];
#endif
#ifdef IPOL_T0
scan.t0[0] += scan.slopeT0[0];
scan.t0[1] += scan.slopeT0[1];
#endif
#ifdef IPOL_T1
scan.t1[0] += scan.slopeT1[0];
scan.t1[1] += scan.slopeT1[1];
#endif
}
}
RenderTarget->unlock();
#ifdef IPOL_Z
ZBuffer->unlock();
#endif
#ifdef IPOL_T0
IT[0].Texture->unlock();
#endif
#ifdef IPOL_T1
IT[1].Texture->unlock();
#endif
}