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melonDS
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fixes to 3D rendering. polygons are almost pixel-perfect. clipping still doesn't get colors quite right.

This commit is contained in:
StapleButter 2017-02-20 18:46:44 +01:00
parent 261689d3d1
commit dadf1eb5a5
4 changed files with 107 additions and 45 deletions
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37
GPU3D.cpp
View File

@ -399,7 +399,7 @@ void ClipSegment(Vertex* outbuf, Vertex* vout, Vertex* vin)
s32 factor_den = factor_num - (vout->Position[3] - (plane*vout->Position[comp]));
Vertex mid;
#define INTERPOLATE(var) mid.var = vin->var + (((vout->var - vin->var) * factor_num) / factor_den);
#define INTERPOLATE(var) mid.var = (vin->var + ((vout->var - vin->var) * factor_num) / factor_den);
INTERPOLATE(Position[0]);
INTERPOLATE(Position[1]);
@ -587,6 +587,15 @@ void SubmitPolygon()
clippedvertices[1][c++] = vtx;
}
for (int i = 0; i < c; i++)
{
Vertex* vtx = &clippedvertices[1][i];
vtx->Color[0] &= ~0xFFF; vtx->Color[0] += 0xFFF;
vtx->Color[1] &= ~0xFFF; vtx->Color[1] += 0xFFF;
vtx->Color[2] &= ~0xFFF; vtx->Color[2] += 0xFFF;
}
// Y clipping
nverts = c; c = clipstart;
@ -643,6 +652,15 @@ void SubmitPolygon()
clippedvertices[1][c++] = vtx;
}
for (int i = 0; i < c; i++)
{
Vertex* vtx = &clippedvertices[1][i];
vtx->Color[0] &= ~0xFFF; vtx->Color[0] += 0xFFF;
vtx->Color[1] &= ~0xFFF; vtx->Color[1] += 0xFFF;
vtx->Color[2] &= ~0xFFF; vtx->Color[2] += 0xFFF;
}
// Z clipping
nverts = c; c = clipstart;
@ -699,6 +717,15 @@ void SubmitPolygon()
clippedvertices[1][c++] = vtx;
}
for (int i = 0; i < c; i++)
{
Vertex* vtx = &clippedvertices[1][i];
vtx->Color[0] &= ~0xFFF; vtx->Color[0] += 0xFFF;
vtx->Color[1] &= ~0xFFF; vtx->Color[1] += 0xFFF;
vtx->Color[2] &= ~0xFFF; vtx->Color[2] += 0xFFF;
}
if (c == 0)
{
LastStripPolygon = NULL;
@ -767,9 +794,9 @@ void SubmitVertex()
vertextrans->Position[2] = (vertex[0]*ClipMatrix[2] + vertex[1]*ClipMatrix[6] + vertex[2]*ClipMatrix[10] + vertex[3]*ClipMatrix[14]) >> 12;
vertextrans->Position[3] = (vertex[0]*ClipMatrix[3] + vertex[1]*ClipMatrix[7] + vertex[2]*ClipMatrix[11] + vertex[3]*ClipMatrix[15]) >> 12;
vertextrans->Color[0] = VertexColor[0];
vertextrans->Color[1] = VertexColor[1];
vertextrans->Color[2] = VertexColor[2];
vertextrans->Color[0] = (VertexColor[0] << 12) + 0xFFF;
vertextrans->Color[1] = (VertexColor[1] << 12) + 0xFFF;
vertextrans->Color[2] = (VertexColor[2] << 12) + 0xFFF;
vertextrans->Clipped = false;
vertextrans->ViewportTransformDone = false;
@ -1408,7 +1435,7 @@ void Write32(u32 addr, u32 val)
for (;;)
{
if ((CurCommand & 0xFF) || (NumCommands == 4))
if ((CurCommand & 0xFF) || (NumCommands == 4 && CurCommand == 0))
{
CmdFIFOEntry entry;
entry.Command = CurCommand & 0xFF;

2
GPU3D.h
View File

@ -25,7 +25,7 @@ namespace GPU3D
typedef struct
{
s32 Position[4];
u8 Color[3];
s32 Color[3];
bool Clipped;

103
GPU3D_Soft.cpp
View File

@ -78,9 +78,11 @@ void RenderPixel(u32 attr, s32 x, s32 y, s32 z, u8 vr, u8 vg, u8 vb)
void RenderPolygon(Polygon* polygon)
{
int nverts = polygon->NumVertices;
bool isline = false;
int vtop = 0, vbot = 0;
s32 ytop = 191, ybot = 0;
s32 ytop = 192, ybot = 0;
s32 xtop = 256, xbot = 0;
// process the vertices, transform to screen coordinates
// find the topmost and bottommost vertices of the polygon
@ -112,34 +114,36 @@ void RenderPolygon(Polygon* polygon)
}
s32 scrX = (((posX + 0x1000) * Viewport[2]) >> 13) + Viewport[0];
s32 scrY = (((posY + 0x1000) * Viewport[3]) >> 13) + Viewport[1];
s32 scrY = ((0x180000 - ((posY + 0x1000) * Viewport[3])) >> 13) + Viewport[1];
if (scrX < 0) scrX = 0;
else if (scrX > 255) scrX = 255;
else if (scrX > 256) scrX = 256;
if (scrY < 0) scrY = 0;
else if (scrY > 191) scrY = 191;
else if (scrY > 192) scrY = 192;
if (posZ < 0) posZ = 0;
else if (posZ > 0xFFFFFF) posZ = 0xFFFFFF;
vtx->FinalPosition[0] = scrX;
vtx->FinalPosition[1] = 191 - scrY;
vtx->FinalPosition[1] = scrY;
vtx->FinalPosition[2] = posZ;
vtx->FinalPosition[3] = posW;
vtx->FinalColor[0] = vtx->Color[0] ? ((vtx->Color[0] << 4) + 0xF) : 0;
vtx->FinalColor[1] = vtx->Color[1] ? ((vtx->Color[1] << 4) + 0xF) : 0;
vtx->FinalColor[2] = vtx->Color[2] ? ((vtx->Color[2] << 4) + 0xF) : 0;
vtx->FinalColor[0] = vtx->Color[0] ? (((vtx->Color[0] >> 12) << 4) + 0xF) : 0;
vtx->FinalColor[1] = vtx->Color[1] ? (((vtx->Color[1] >> 12) << 4) + 0xF) : 0;
vtx->FinalColor[2] = vtx->Color[2] ? (((vtx->Color[2] >> 12) << 4) + 0xF) : 0;
vtx->ViewportTransformDone = true;
}
if (vtx->FinalPosition[1] < ytop)
if (vtx->FinalPosition[1] < ytop || (vtx->FinalPosition[1] == ytop && vtx->FinalPosition[0] < xtop))
{
xtop = vtx->FinalPosition[0];
ytop = vtx->FinalPosition[1];
vtop = i;
}
if (vtx->FinalPosition[1] > ybot)
if (vtx->FinalPosition[1] > ybot || (vtx->FinalPosition[1] == ybot && vtx->FinalPosition[0] > xbot))
{
xbot = vtx->FinalPosition[0];
ybot = vtx->FinalPosition[1];
vbot = i;
}
@ -150,26 +154,51 @@ void RenderPolygon(Polygon* polygon)
int lcur = vtop, rcur = vtop;
int lnext, rnext;
if (polygon->FacingView)
if (ybot == ytop)
{
lnext = lcur + 1;
if (lnext >= nverts) lnext = 0;
rnext = rcur - 1;
if (rnext < 0) rnext = nverts - 1;
ybot++;
isline = true;
vtop = 0; vbot = 0;
xtop = 256; xbot = 0;
int i;
i = 1;
if (polygon->Vertices[i]->FinalPosition[0] < polygon->Vertices[vtop]->FinalPosition[0]) vtop = i;
if (polygon->Vertices[i]->FinalPosition[0] > polygon->Vertices[vbot]->FinalPosition[0]) vbot = i;
i = nverts - 1;
if (polygon->Vertices[i]->FinalPosition[0] < polygon->Vertices[vtop]->FinalPosition[0]) vtop = i;
if (polygon->Vertices[i]->FinalPosition[0] > polygon->Vertices[vbot]->FinalPosition[0]) vbot = i;
lcur = vtop; lnext = vtop;
rcur = vbot; rnext = vbot;
}
else
{
lnext = lcur - 1;
if (lnext < 0) lnext = nverts - 1;
rnext = rcur + 1;
if (rnext >= nverts) rnext = 0;
if (polygon->FacingView)
{
lnext = lcur + 1;
if (lnext >= nverts) lnext = 0;
rnext = rcur - 1;
if (rnext < 0) rnext = nverts - 1;
}
else
{
lnext = lcur - 1;
if (lnext < 0) lnext = nverts - 1;
rnext = rcur + 1;
if (rnext >= nverts) rnext = 0;
}
}
for (s32 y = ytop; y <= ybot; y++)
for (s32 y = ytop; y < ybot; y++)
{
if (y < ybot)
if (y > 191) break;
if (!isline)
{
while (y == polygon->Vertices[lnext]->FinalPosition[1])
while (y >= polygon->Vertices[lnext]->FinalPosition[1] && lcur != vbot)
{
lcur = lnext;
@ -183,11 +212,9 @@ void RenderPolygon(Polygon* polygon)
lnext = lcur - 1;
if (lnext < 0) lnext = nverts - 1;
}
if (lcur == vbot) break;
}
while (y == polygon->Vertices[rnext]->FinalPosition[1])
while (y >= polygon->Vertices[rnext]->FinalPosition[1] && rcur != vbot)
{
rcur = rnext;
@ -201,8 +228,6 @@ void RenderPolygon(Polygon* polygon)
rnext = rcur + 1;
if (rnext >= nverts) rnext = 0;
}
if (rcur == vbot) break;
}
}
@ -226,7 +251,20 @@ void RenderPolygon(Polygon* polygon)
s32 xl = vlcur->FinalPosition[0] + (((vlnext->FinalPosition[0] - vlcur->FinalPosition[0]) * lfactor) >> 12);
s32 xr = vrcur->FinalPosition[0] + (((vrnext->FinalPosition[0] - vrcur->FinalPosition[0]) * rfactor) >> 12);
if (xl<0 || xr>255)
if (xl > xr) // TODO: handle it in a more elegant way
{
Vertex* vtmp;
s32 tmp;
vtmp = vlcur; vlcur = vrcur; vrcur = vtmp;
vtmp = vlnext; vlnext = vrnext; vrnext = vtmp;
tmp = lfactor; lfactor = rfactor; rfactor = tmp;
tmp = xl; xl = xr; xr = tmp;
}
if (xl<0 || xr>256)
{
printf("!! BAD X %d %d\n", xl, xr);
continue; // hax
@ -262,13 +300,10 @@ void RenderPolygon(Polygon* polygon)
s32 gr = ((perspfactorr1 * vrcur->FinalColor[1]) + (perspfactorr2 * vrnext->FinalColor[1])) / (perspfactorr1 + perspfactorr2);
s32 br = ((perspfactorr1 * vrcur->FinalColor[2]) + (perspfactorr2 * vrnext->FinalColor[2])) / (perspfactorr1 + perspfactorr2);
s32 xdiv;
if (xr == xl)
xdiv = 0;
else
xdiv = 0x1000 / (xr - xl);
if (xr == xl) xr++;
s32 xdiv = 0x1000 / (xr - xl);
for (s32 x = xl; x <= xr; x++)
for (s32 x = xl; x < xr; x++)
{
s32 xfactor = (x - xl) * xdiv;

10
melonDS.depend
View File

@ -1,5 +1,5 @@
# depslib dependency file v1.0
1487292827 source:c:\documents\sources\melonds\main.cpp
1487356459 source:c:\documents\sources\melonds\main.cpp
<stdio.h>
<windows.h>
"NDS.h"
@ -10,7 +10,7 @@
1481161027 c:\documents\sources\melonds\types.h
1487349286 source:c:\documents\sources\melonds\nds.cpp
1487609259 source:c:\documents\sources\melonds\nds.cpp
<stdio.h>
<string.h>
"NDS.h"
@ -146,16 +146,16 @@
"NDS.h"
"NDSCart.h"
1487356069 c:\documents\sources\melonds\gpu3d.h
1487610598 c:\documents\sources\melonds\gpu3d.h
1487354054 source:c:\documents\sources\melonds\gpu3d.cpp
1487612707 source:c:\documents\sources\melonds\gpu3d.cpp
<stdio.h>
<string.h>
"NDS.h"
"GPU.h"
"FIFO.h"
1487300658 source:c:\documents\sources\melonds\gpu3d_soft.cpp
1487611069 source:c:\documents\sources\melonds\gpu3d_soft.cpp
<stdio.h>
<string.h>
"NDS.h"