public static void DrawTriangle2(Model m, int i)
{
var centerX = SoftwareRasterizer3D.CenterX;
var centerY = SoftwareRasterizer3D.CenterY;
var j = 0;
var a = m.TriangleViewspaceA[i];
var b = m.TriangleViewspaceB[i];
var c = m.TriangleViewspaceC[i];
var aZ = TmpTexturedZ[a];
var bZ = TmpTexturedZ[b];
var cZ = TmpTexturedZ[c];
if (aZ >= 50)
{
TmpScreenX[j] = TriangleX[a];
TmpScreenY[j] = TriangleY[a];
TmpHsl[j++] = m.TriHsl1[i];
}
else
{
int x = TmpTexturedX[a];
int y = TmpTexturedY[a];
int hsl = m.TriHsl1[i];
if (cZ >= 50)
{
int decay = (50 - aZ) * SoftwareRasterizer3D.ShadowDecay[cZ - aZ];
TmpScreenX[j] = centerX + (x + ((TmpTexturedX[c] - x) * decay >> 16) << 9) / 50;
TmpScreenY[j] = centerY + (y + ((TmpTexturedY[c] - y) * decay >> 16) << 9) / 50;
TmpHsl[j++] = hsl + ((m.TriHsl3[i] - hsl) * decay >> 16);
}
if (bZ >= 50)
{
int decay = (50 - aZ) * SoftwareRasterizer3D.ShadowDecay[bZ - aZ];
TmpScreenX[j] = centerX + (x + ((TmpTexturedX[b] - x) * decay >> 16) << 9) / 50;
TmpScreenY[j] = centerY + (y + ((TmpTexturedY[b] - y) * decay >> 16) << 9) / 50;
TmpHsl[j++] = hsl + ((m.TriHsl2[i] - hsl) * decay >> 16);
}
}
if (bZ >= 50)
{
TmpScreenX[j] = TriangleX[b];
TmpScreenY[j] = TriangleY[b];
TmpHsl[j++] = m.TriHsl2[i];
}
else
{
int x = TmpTexturedX[b];
int y = TmpTexturedY[b];
int hsl = m.TriHsl2[i];
if (aZ >= 50)
{
int i6 = (50 - bZ) * SoftwareRasterizer3D.ShadowDecay[aZ - bZ];
TmpScreenX[j] = centerX + (x + ((TmpTexturedX[a] - x) * i6 >> 16) << 9) / 50;
TmpScreenY[j] = centerY + (y + ((TmpTexturedY[a] - y) * i6 >> 16) << 9) / 50;
TmpHsl[j++] = hsl + ((m.TriHsl1[i] - hsl) * i6 >> 16);
}
if (cZ >= 50)
{
int j6 = (50 - bZ) * SoftwareRasterizer3D.ShadowDecay[cZ - bZ];
TmpScreenX[j] = centerX + (x + ((TmpTexturedX[c] - x) * j6 >> 16) << 9) / 50;
TmpScreenY[j] = centerY + (y + ((TmpTexturedY[c] - y) * j6 >> 16) << 9) / 50;
TmpHsl[j++] = hsl + ((m.TriHsl3[i] - hsl) * j6 >> 16);
}
}
if (cZ >= 50)
{
TmpScreenX[j] = TriangleX[c];
TmpScreenY[j] = TriangleY[c];
TmpHsl[j++] = m.TriHsl3[i];
}
else
{
var x = TmpTexturedX[c];
var y = TmpTexturedY[c];
var hsl = m.TriHsl3[i];
if (bZ >= 50)
{
var k6 = (50 - cZ) * SoftwareRasterizer3D.ShadowDecay[bZ - cZ];
TmpScreenX[j] = centerX + (x + ((TmpTexturedX[b] - x) * k6 >> 16) << 9) / 50;
TmpScreenY[j] = centerY + (y + ((TmpTexturedY[b] - y) * k6 >> 16) << 9) / 50;
TmpHsl[j++] = hsl + ((m.TriHsl2[i] - hsl) * k6 >> 16);
}
if (aZ >= 50)
{
var l6 = (50 - cZ) * SoftwareRasterizer3D.ShadowDecay[aZ - cZ];
TmpScreenX[j] = centerX + (x + ((TmpTexturedX[a] - x) * l6 >> 16) << 9) / 50;
TmpScreenY[j] = centerY + (y + ((TmpTexturedY[a] - y) * l6 >> 16) << 9) / 50;
TmpHsl[j++] = hsl + ((m.TriHsl2[i] - hsl) * l6 >> 16);
}
}
var x0 = TmpScreenX[0];
var x1 = TmpScreenX[1];
var x2 = TmpScreenX[2];
var y0 = TmpScreenY[0];
var y1 = TmpScreenY[1];
var y2 = TmpScreenY[2];
if ((x0 - x1) * (y2 - y1) - (y0 - y1) * (x2 - x1) > 0)
{
SoftwareRasterizer3D.CheckBounds = false;
if (j == 3)
{
if (x0 < 0 || x1 < 0 || x2 < 0 || x0 > SoftwareRasterizer2D.Bound || x1 > SoftwareRasterizer2D.Bound || x2 > SoftwareRasterizer2D.Bound)
{
SoftwareRasterizer3D.CheckBounds = true;
}
var type = 0;
if (m.TriangleInfo != null)
{
type = m.TriangleInfo[i] & 3;
}
if (type == TypeShadedTri)
{
SoftwareRasterizer3D.DrawShadedTriangle(x0, y0, x1, y1, x2, y2, TmpHsl[0], TmpHsl[1], TmpHsl[2]);
}
else if (type == TypeFlatTri)
{
SoftwareRasterizer3D.DrawFlatTriangle(x0, y0, x1, y1, x2, y2, ColorUtils.HSLToRGBMap[m.TriHsl1[i]]);
}
else if (type == TypeShadedTexTri)
{
var k = m.TriangleInfo[i] >> 2;
var x = m.TextureMapX[k];
var y = m.TextureMapY[k];
var z = m.TextureMapZ[k];
SoftwareRasterizer3D.DrawShadedTriangle(x0, y0, x1, y1, x2, y2, TmpHsl[0], TmpHsl[1], TmpHsl[2]);
}
else if (type == TypeFlatTexTri)
{
var k = m.TriangleInfo[i] >> 2;
var x = m.TextureMapX[k];
var y = m.TextureMapY[k];
var z = m.TextureMapZ[k];
SoftwareRasterizer3D.DrawShadedTriangle(x0, y0, x1, y1, x2, y2, TmpHsl[0], TmpHsl[1], TmpHsl[2]);
}
}
else if (j == 4)
{
if (x0 < 0 || x1 < 0 || x2 < 0 || x0 > SoftwareRasterizer2D.Bound || x1 > SoftwareRasterizer2D.Bound || x2 > SoftwareRasterizer2D.Bound || TmpScreenX[3] < 0 || TmpScreenX[3] > SoftwareRasterizer2D.Bound)
{
SoftwareRasterizer3D.CheckBounds = true;
}
var type = 0;
if (m.TriangleInfo != null)
{
type = m.TriangleInfo[i] & 3;
}
if (type == TypeShadedTri)
{
SoftwareRasterizer3D.DrawShadedTriangle(x0, y0, x1, y1, x2, y2, TmpHsl[0], TmpHsl[1], TmpHsl[2]);
SoftwareRasterizer3D.DrawShadedTriangle(x0, y0, x2, y2, TmpScreenX[3], TmpScreenY[3], TmpHsl[0], TmpHsl[2], TmpHsl[3]);
}
else if (type == TypeFlatTri)
{
var rgb = ColorUtils.HSLToRGBMap[m.TriHsl1[i]];
SoftwareRasterizer3D.DrawFlatTriangle(x0, y0, x1, y1, x2, y2, rgb);
SoftwareRasterizer3D.DrawFlatTriangle(x0, y0, x2, y2, TmpScreenX[3], TmpScreenY[3], rgb);
}
else if (type == TypeShadedTexTri)
{
var k = m.TriangleInfo[i] >> 2;
var x = m.TextureMapX[k];
var y = m.TextureMapY[k];
var z = m.TextureMapZ[k];
SoftwareRasterizer3D.DrawShadedTriangle(x0, y0, x1, y1, x2, y2, TmpHsl[0], TmpHsl[1], TmpHsl[2]);
SoftwareRasterizer3D.DrawShadedTriangle(x0, y0, x2, y2, TmpScreenX[3], TmpScreenY[3], TmpHsl[0], TmpHsl[2], TmpHsl[3]);
}
else if (type == TypeFlatTexTri)
{
var k = m.TriangleInfo[i] >> 2;
var x = m.TextureMapX[k];
var y = m.TextureMapY[k];
var z = m.TextureMapZ[k];
SoftwareRasterizer3D.DrawShadedTriangle(x0, y0, x1, y1, x2, y2, TmpHsl[0], TmpHsl[1], TmpHsl[2]);
SoftwareRasterizer3D.DrawShadedTriangle(x0, y0, x2, y2, TmpScreenX[3], TmpScreenY[3], TmpHsl[0], TmpHsl[2], TmpHsl[3]);
}
}
}
}
public static void DrawTriangle(Model m, int idx)
{
if (TriangleProject[idx])
{
DrawTriangle2(m, idx);
return;
}
var firstTriVertex = m.TriangleViewspaceA[idx];
var secondTriVertex = m.TriangleViewspaceB[idx];
var thirdTriVertex = m.TriangleViewspaceC[idx];
SoftwareRasterizer3D.CheckBounds = TriangleCheckBounds[idx];
if (m.TriangleAlpha == null)
{
SoftwareRasterizer3D.Opacity = 0;
}
else
{
SoftwareRasterizer3D.Opacity = m.TriangleAlpha[idx];
}
var type = 0;
if (m.TriangleInfo != null)
{
type = m.TriangleInfo[idx] & 3;
}
switch (type)
{
case TypeShadedTri:
{
SoftwareRasterizer3D.DrawShadedTriangle(TriangleX[firstTriVertex], TriangleY[firstTriVertex], TriangleX[secondTriVertex], TriangleY[secondTriVertex], TriangleX[thirdTriVertex], TriangleY[thirdTriVertex], m.TriHsl1[idx], m.TriHsl2[idx], m.TriHsl3[idx]);
return;
}
case TypeFlatTri:
{
SoftwareRasterizer3D.DrawFlatTriangle(TriangleX[firstTriVertex], TriangleY[firstTriVertex], TriangleX[secondTriVertex], TriangleY[secondTriVertex], TriangleX[thirdTriVertex], TriangleY[thirdTriVertex], ColorUtils.HSLToRGBMap[m.TriHsl1[idx]]);
return;
}
case TypeShadedTexTri:
{
var j = m.TriangleInfo[idx] >> 2;
var x = m.TextureMapX[j];
var y = m.TextureMapY[j];
var z = m.TextureMapZ[j];
SoftwareRasterizer3D.DrawShadedTriangle(TriangleX[firstTriVertex], TriangleY[firstTriVertex], TriangleX[secondTriVertex], TriangleY[secondTriVertex], TriangleX[thirdTriVertex], TriangleY[thirdTriVertex], m.TriHsl1[idx], m.TriHsl2[idx], m.TriHsl3[idx]);
return;
}
case TypeFlatTexTri:
{
var j = m.TriangleInfo[idx] >> 2;
var x = m.TextureMapX[j];
var y = m.TextureMapY[j];
var z = m.TextureMapZ[j];
SoftwareRasterizer3D.DrawShadedTriangle(TriangleX[firstTriVertex], TriangleY[firstTriVertex], TriangleX[secondTriVertex], TriangleY[secondTriVertex], TriangleX[thirdTriVertex], TriangleY[thirdTriVertex], m.TriHsl1[idx], m.TriHsl2[idx], m.TriHsl3[idx]);
return;
}
}
}