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melonDS
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calculate vertices. 

it doesn't do much, but hey, it's a start.
This commit is contained in:
StapleButter 2017-02-09 02:39:52 +01:00
parent 49fd4ccb45
commit 2bd67aef64
3 changed files with 207 additions and 41 deletions
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2
DMA.cpp
View File

@ -126,7 +126,7 @@ void DMA::Start()
NDS::TriggerIRQ(CPU, NDS::IRQ_DMA0 + Num);
return;
}
if (StartMode == 0x07)printf("GXFIFO DMA %08X %08X\n", Cnt, CurSrcAddr);
//if (StartMode == 0x07)printf("GXFIFO DMA %08X %08X\n", Cnt, CurSrcAddr);
u32 num = RemCount;
if (StartMode == 0x07 && num > 112)
num = 112;

238
GPU3D.cpp
View File

@ -23,6 +23,19 @@
#include "FIFO.h"
// 3D engine notes
//
// vertex/polygon RAM is filled when a complete polygon is defined, after it's been culled and clipped
// 04000604 reads from bank used by renderer
// bank used by renderer is emptied at scanline ~192
// banks are swapped at scanline ~194
// TODO: needs more investigation. it's weird.
//
// clipping rules:
// * if a shared vertex in a strip is clipped, affected polygons are converted into single polygons
// strip is resumed at the first eligible polygon
namespace GPU3D
{
@ -126,11 +139,77 @@ s32 PosMatrix[16];
s32 VecMatrix[16];
s32 TexMatrix[16];
s32 ClipMatrix[16];
bool ClipMatrixDirty;
s32 Viewport[4];
s32 ProjMatrixStack[16];
s32 PosMatrixStack[31][16];
s32 ProjMatrixStackPointer;
s32 PosMatrixStackPointer;
void MatrixLoadIdentity(s32* m);
void UpdateClipMatrix();
u32 PolygonMode;
s16 CurVertex[3];
s32 TempVertexBuffer[4][4];
bool Init()
{
CmdFIFO = new FIFO<CmdFIFOEntry>(256);
CmdPIPE = new FIFO<CmdFIFOEntry>(4);
return true;
}
void DeInit()
{
delete CmdFIFO;
delete CmdPIPE;
}
void Reset()
{
CmdFIFO->Clear();
CmdPIPE->Clear();
NumCommands = 0;
CurCommand = 0;
ParamCount = 0;
TotalParams = 0;
GXStat = 0;
memset(ExecParams, 0, 32*4);
ExecParamCount = 0;
CycleCount = 0;
MatrixMode = 0;
MatrixLoadIdentity(ProjMatrix);
MatrixLoadIdentity(PosMatrix);
MatrixLoadIdentity(VecMatrix);
MatrixLoadIdentity(TexMatrix);
ClipMatrixDirty = true;
UpdateClipMatrix();
memset(Viewport, 0, sizeof(Viewport));
memset(ProjMatrixStack, 0, 16*4);
memset(PosMatrixStack, 0, 31 * 16*4);
ProjMatrixStackPointer = 0;
PosMatrixStackPointer = 0;
}
void MatrixLoadIdentity(s32* m)
{
@ -254,52 +333,52 @@ void MatrixTranslate(s32* m, s32* s)
m[14] += (s[0]*m[2] + s[1]*m[6] + s[2]*m[10]) >> 12;
}
bool Init()
void UpdateClipMatrix()
{
CmdFIFO = new FIFO<CmdFIFOEntry>(256);
CmdPIPE = new FIFO<CmdFIFOEntry>(4);
if (!ClipMatrixDirty) return;
ClipMatrixDirty = false;
return true;
memcpy(ClipMatrix, ProjMatrix, 16*4);
MatrixMult4x4(ClipMatrix, PosMatrix);
}
void DeInit()
void SubmitPolygon()
{
delete CmdFIFO;
delete CmdPIPE;
//
}
void Reset()
void SubmitVertex()
{
CmdFIFO->Clear();
CmdPIPE->Clear();
s32 vertex[4] = {(s32)CurVertex[0], (s32)CurVertex[1], (s32)CurVertex[2], 0x1000};
s32 vertextrans[4];
NumCommands = 0;
CurCommand = 0;
ParamCount = 0;
TotalParams = 0;
//printf("vertex: %f %f %f\n", vertex[0]/4096.0f, vertex[1]/4096.0f, vertex[2]/4096.0f);
GXStat = 0;
UpdateClipMatrix();
vertextrans[0] = (vertex[0]*ClipMatrix[0] + vertex[1]*ClipMatrix[4] + vertex[2]*ClipMatrix[8] + vertex[3]*ClipMatrix[12]) >> 12;
vertextrans[1] = (vertex[0]*ClipMatrix[1] + vertex[1]*ClipMatrix[5] + vertex[2]*ClipMatrix[9] + vertex[3]*ClipMatrix[13]) >> 12;
vertextrans[2] = (vertex[0]*ClipMatrix[2] + vertex[1]*ClipMatrix[6] + vertex[2]*ClipMatrix[10] + vertex[3]*ClipMatrix[14]) >> 12;
vertextrans[3] = (vertex[0]*ClipMatrix[3] + vertex[1]*ClipMatrix[7] + vertex[2]*ClipMatrix[11] + vertex[3]*ClipMatrix[15]) >> 12;
memset(ExecParams, 0, 32*4);
ExecParamCount = 0;
CycleCount = 0;
//printf("vertex trans: %f %f %f\n", vertextrans[0]/4096.0f, vertextrans[1]/4096.0f, vertextrans[2]/4096.0f);
if (vertextrans[3] == 0)
{
//printf("!!!! VERTEX W IS ZERO\n");
//return;
vertextrans[3] = 0x1000; // checkme
}
MatrixMode = 0;
s32 screenX = (((vertextrans[0]+vertextrans[3]) * Viewport[2]) / (vertextrans[3]<<1)) + Viewport[0];
s32 screenY = (((vertextrans[1]+vertextrans[3]) * Viewport[3]) / (vertextrans[3]<<1)) + Viewport[1];
MatrixLoadIdentity(ProjMatrix);
MatrixLoadIdentity(PosMatrix);
MatrixLoadIdentity(VecMatrix);
MatrixLoadIdentity(TexMatrix);
memset(ProjMatrixStack, 0, 16*4);
memset(PosMatrixStack, 0, 31 * 16*4);
ProjMatrixStackPointer = 0;
PosMatrixStackPointer = 0;
//printf("screen: %d, %d\n", screenX, screenY);
}
void CmdFIFOWrite(CmdFIFOEntry& entry)
{
if (CmdFIFO->IsEmpty() && !CmdPIPE->IsFull())
@ -338,7 +417,6 @@ CmdFIFOEntry CmdFIFORead()
void ExecuteCommand()
{
CmdFIFOEntry entry = CmdFIFORead();
@ -408,6 +486,7 @@ void ExecuteCommand()
ProjMatrixStackPointer--;
memcpy(ProjMatrix, ProjMatrixStack, 16*4);
GXStat |= (1<<14);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
{
@ -429,6 +508,7 @@ void ExecuteCommand()
memcpy(PosMatrix, PosMatrixStack[PosMatrixStackPointer], 16*4);
GXStat |= (1<<14);
ClipMatrixDirty = true;
}
break;
@ -460,6 +540,7 @@ void ExecuteCommand()
if (MatrixMode == 0)
{
memcpy(ProjMatrix, ProjMatrixStack, 16*4);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
{
@ -477,12 +558,16 @@ void ExecuteCommand()
}
memcpy(PosMatrix, PosMatrixStack[addr], 16*4);
ClipMatrixDirty = true;
}
break;
case 0x15: // identity
if (MatrixMode == 0)
{
MatrixLoadIdentity(ProjMatrix);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
MatrixLoadIdentity(TexMatrix);
else
@ -490,12 +575,16 @@ void ExecuteCommand()
MatrixLoadIdentity(PosMatrix);
if (MatrixMode == 2)
MatrixLoadIdentity(VecMatrix);
ClipMatrixDirty = true;
}
break;
case 0x16: // load 4x4
if (MatrixMode == 0)
{
MatrixLoad4x4(ProjMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
MatrixLoad4x4(TexMatrix, (s32*)ExecParams);
else
@ -503,12 +592,16 @@ void ExecuteCommand()
MatrixLoad4x4(PosMatrix, (s32*)ExecParams);
if (MatrixMode == 2)
MatrixLoad4x4(VecMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
break;
case 0x17: // load 4x3
if (MatrixMode == 0)
{
MatrixLoad4x3(ProjMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
MatrixLoad4x3(TexMatrix, (s32*)ExecParams);
else
@ -516,12 +609,16 @@ void ExecuteCommand()
MatrixLoad4x3(PosMatrix, (s32*)ExecParams);
if (MatrixMode == 2)
MatrixLoad4x3(VecMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
break;
case 0x18: // mult 4x4
if (MatrixMode == 0)
{
MatrixMult4x4(ProjMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
MatrixMult4x4(TexMatrix, (s32*)ExecParams);
else
@ -532,12 +629,16 @@ void ExecuteCommand()
MatrixMult4x4(VecMatrix, (s32*)ExecParams);
CycleCount += 30;
}
ClipMatrixDirty = true;
}
break;
case 0x19: // mult 4x3
if (MatrixMode == 0)
{
MatrixMult4x3(ProjMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
MatrixMult4x3(TexMatrix, (s32*)ExecParams);
else
@ -548,12 +649,16 @@ void ExecuteCommand()
MatrixMult4x3(VecMatrix, (s32*)ExecParams);
CycleCount += 30;
}
ClipMatrixDirty = true;
}
break;
case 0x1A: // mult 3x3
if (MatrixMode == 0)
{
MatrixMult3x3(ProjMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
MatrixMult3x3(TexMatrix, (s32*)ExecParams);
else
@ -564,21 +669,31 @@ void ExecuteCommand()
MatrixMult3x3(VecMatrix, (s32*)ExecParams);
CycleCount += 30;
}
ClipMatrixDirty = true;
}
break;
case 0x1B: // scale
if (MatrixMode == 0)
{
MatrixScale(ProjMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
MatrixScale(TexMatrix, (s32*)ExecParams);
else
{
MatrixScale(PosMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
break;
case 0x1C: // translate
if (MatrixMode == 0)
{
MatrixTranslate(ProjMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
else if (MatrixMode == 3)
MatrixTranslate(TexMatrix, (s32*)ExecParams);
else
@ -586,6 +701,7 @@ void ExecuteCommand()
MatrixTranslate(PosMatrix, (s32*)ExecParams);
if (MatrixMode == 2)
MatrixTranslate(VecMatrix, (s32*)ExecParams);
ClipMatrixDirty = true;
}
break;
@ -593,9 +709,59 @@ void ExecuteCommand()
// TODO: more cycles if lights are enabled
break;
case 0x23: // full vertex
CurVertex[0] = ExecParams[0] & 0xFFFF;
CurVertex[1] = ExecParams[0] >> 16;
CurVertex[2] = ExecParams[1] & 0xFFFF;
SubmitVertex();
break;
case 0x24: // 10-bit vertex
CurVertex[0] = (ExecParams[0] & 0x000003FF) << 6;
CurVertex[1] = (ExecParams[0] & 0x000FFC00) >> 4;
CurVertex[2] = (ExecParams[0] & 0x3FF00000) >> 14;
SubmitVertex();
break;
case 0x25: // vertex XY
CurVertex[0] = ExecParams[0] & 0xFFFF;
CurVertex[1] = ExecParams[0] >> 16;
SubmitVertex();
break;
case 0x26: // vertex XZ
CurVertex[0] = ExecParams[0] & 0xFFFF;
CurVertex[2] = ExecParams[0] >> 16;
SubmitVertex();
break;
case 0x27: // vertex YZ
CurVertex[1] = ExecParams[0] & 0xFFFF;
CurVertex[2] = ExecParams[0] >> 16;
SubmitVertex();
break;
case 0x28: // 10-bit delta vertex
CurVertex[0] += (s16)((ExecParams[0] & 0x000003FF) << 6) >> 6;
CurVertex[1] += (s16)((ExecParams[0] & 0x000FFC00) >> 4) >> 6;
CurVertex[2] += (s16)((ExecParams[0] & 0x3FF00000) >> 14) >> 6;
SubmitVertex();
break;
case 0x40:
PolygonMode = ExecParams[0] & 0x3;
break;
case 0x50:
// TODO: make it happen upon VBlank, not right now
break;
case 0x60: // viewport x1,y1,x2,y2
Viewport[0] = ExecParams[0] & 0xFF;
Viewport[1] = (ExecParams[0] >> 8) & 0xFF;
Viewport[2] = ((ExecParams[0] >> 16) & 0xFF) - Viewport[0] + 1;
Viewport[3] = (ExecParams[0] >> 24) - Viewport[1] + 1;
break;
}
}
}
@ -606,12 +772,12 @@ void Run(s32 cycles)
{
while (CycleCount <= 0 && !CmdPIPE->IsEmpty())
ExecuteCommand();
if (CmdPIPE->IsEmpty())
CycleCount = 0;
}
else
CycleCount -= cycles;
if (CycleCount <= 0 && CmdPIPE->IsEmpty())
CycleCount = 0;
}
@ -667,8 +833,8 @@ u32 Read32(u32 addr)
if (addr >= 0x04000640 && addr < 0x04000680)
{
printf("!! CLIPMTX READ\n");
return 0;
UpdateClipMatrix();
return ClipMatrix[(addr & 0x3C) >> 2];
}
if (addr >= 0x04000680 && addr < 0x040006A4)
{

6
melonDS.depend
View File

@ -10,7 +10,7 @@
1481161027 c:\documents\sources\melonds\types.h
1486515172 source:c:\documents\sources\melonds\nds.cpp
1486603989 source:c:\documents\sources\melonds\nds.cpp
<stdio.h>
<string.h>
"NDS.h"
@ -109,7 +109,7 @@
1486511075 c:\documents\sources\melonds\fifo.h
"types.h"
1486514961 source:c:\documents\sources\melonds\dma.cpp
1486589927 source:c:\documents\sources\melonds\dma.cpp
<stdio.h>
"NDS.h"
"DMA.h"
@ -148,7 +148,7 @@
1486514429 c:\documents\sources\melonds\gpu3d.h
1486585700 source:c:\documents\sources\melonds\gpu3d.cpp
1486603980 source:c:\documents\sources\melonds\gpu3d.cpp
<stdio.h>
<string.h>
"NDS.h"