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rasterizer: fix texture sampling issues and drawing of back faces

This commit is contained in:
zeromus 2009-02-05 10:16:19 +00:00
parent 6a4cbf19c4
commit 26abbe2f7f
1 changed files with 53 additions and 25 deletions
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78
desmume/src/rasterize.cpp
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@ -298,7 +298,7 @@ struct Interpolator
float x,y,z;
} point0;
Interpolator(int x1, int x2, int x3, int y1, int y2, int y3, float z1, float z2, float z3)
Interpolator(float x1, float x2, float x3, float y1, float y2, float y3, float z1, float z2, float z3)
{
float A = (z3 - z1) * (y2 - y1) - (z2 - z1) * (y3 - y1);
float B = (x3 - x1) * (z2 - z1) - (x2 - x1) * (z3 - z1);
@ -310,18 +310,6 @@ struct Interpolator
point0.z = z1;
}
Interpolator(int x1, int x2, int x3, int y1, int y2, int y3, int z1, int z2, int z3)
{
int A = (z3 - z1) * (y2 - y1) - (z2 - z1) * (y3 - y1);
int B = (x3 - x1) * (z2 - z1) - (x2 - x1) * (z3 - z1);
int C = (x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1);
dx = -(float)A / C;
dy = -(float)B / C;
point0.x = x1;
point0.y = y1;
point0.z = z1;
}
void init(int x, int y)
{
Z = point0.z + dx * (x-point0.x) + dy * (y-point0.y);
@ -635,7 +623,21 @@ static void GetLine(int line, u16* dst, u8* dstAlpha)
}
static void GetLineCaptured(int line, u16* dst) {}
static void GetLineCaptured(int line, u16* dst) {
Fragment* src = screen+((191-line)<<8);
for(int i=0;i<256;i++)
{
const bool testRenderAlpha = false;
u8 r = src->color.components.r;
u8 g = src->color.components.g;
u8 b = src->color.components.b;
*dst = R5G5B5TORGB15(r,g,b);
if(src->color.components.a > 0)
*dst |= 0x8000;
src++;
dst++;
}
}
static void Render()
{
@ -724,23 +726,49 @@ static void Render()
//but then again, what does it matter?
if(type == 4) {
SubmitVertex(verts[2]);
SubmitVertex(verts[1]);
SubmitVertex(verts[0]);
if(backfacing)
{
SubmitVertex(verts[0]);
SubmitVertex(verts[1]);
SubmitVertex(verts[2]);
triangle_from_devmaster();
triangle_from_devmaster();
SubmitVertex(verts[0]);
SubmitVertex(verts[3]);
SubmitVertex(verts[2]);
SubmitVertex(verts[2]);
SubmitVertex(verts[3]);
SubmitVertex(verts[0]);
triangle_from_devmaster();
triangle_from_devmaster();
}
else
{
SubmitVertex(verts[2]);
SubmitVertex(verts[1]);
SubmitVertex(verts[0]);
triangle_from_devmaster();
SubmitVertex(verts[0]);
SubmitVertex(verts[3]);
SubmitVertex(verts[2]);
triangle_from_devmaster();
}
}
if(type == 3) {
SubmitVertex(verts[2]);
SubmitVertex(verts[1]);
SubmitVertex(verts[0]);
if(backfacing)
{
SubmitVertex(verts[0]);
SubmitVertex(verts[1]);
SubmitVertex(verts[2]);
}
else
{
SubmitVertex(verts[2]);
SubmitVertex(verts[1]);
SubmitVertex(verts[0]);
}
triangle_from_devmaster();
}