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Graphics: (faked) bounding box support. Helps some Paper Mario effects although they're still a bit glitchy. Might also help other games? Enable with the #define in VideoCommon.h. Since there might be a speed hit it's off by default.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3580 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard
2009-06-28 20:04:07 +00:00
parent faa63713e2
commit 3d9279a73f
11 changed files with 147 additions and 31 deletions
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54
Source/Core/VideoCommon/Src/VertexLoader.cpp
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@ -38,6 +38,10 @@
#include "VertexLoader_Color.h"
#include "VertexLoader_TextCoord.h"
//BBox
#include "XFMemory.h"
extern float GC_ALIGNED16(g_fProjectionMatrix[16]);
#define USE_JIT
#define COMPILED_CODE_SIZE 4096
@ -82,6 +86,50 @@ void LOADERDECL PosMtx_Write()
*VertexManager::s_pCurBufferPointer++ = 0;
}
void LOADERDECL UpdateBoundingBox()
{
if (!*g_VideoInitialize.pBBoxActive)
return;
// Truly evil hack, reading backwards from the write pointer. If we were writing to write-only
// memory like we might have been with a D3D vertex buffer, this would have been a bad idea.
float *data = (float *)(VertexManager::s_pCurBufferPointer - 12);
// We must transform the just loaded point by the current world and projection matrix - in software.
// Then convert to screen space and update the bounding box.
float p[3] = {data[0], data[1], data[2]};
const float *world_matrix = (float*)xfmem + MatrixIndexA.PosNormalMtxIdx * 4;
const float *proj_matrix = &g_fProjectionMatrix[0];
float t[3];
t[0] = p[0] * world_matrix[0] + p[1] * world_matrix[1] + p[2] * world_matrix[2] + world_matrix[3];
t[1] = p[0] * world_matrix[4] + p[1] * world_matrix[5] + p[2] * world_matrix[6] + world_matrix[7];
t[2] = p[0] * world_matrix[8] + p[1] * world_matrix[9] + p[2] * world_matrix[10] + world_matrix[11];
float o[4];
o[0] = t[0] * proj_matrix[0] + t[1] * proj_matrix[1] + t[2] * proj_matrix[2] + proj_matrix[3];
o[1] = t[0] * proj_matrix[4] + t[1] * proj_matrix[5] + t[2] * proj_matrix[6] + proj_matrix[7];
o[2] = t[0] * proj_matrix[8] + t[1] * proj_matrix[9] + t[2] * proj_matrix[10] + proj_matrix[11];
o[3] = t[0] * proj_matrix[12] + t[1] * proj_matrix[13] + t[2] * proj_matrix[14] + proj_matrix[15];
o[0] /= o[3];
o[1] /= o[3];
// should possibly adjust for viewport?
o[0] = (o[0] + 1.0f) * 320.0f;
o[1] = (o[1] + 1.0f) * 240.0f;
if (o[0] < g_VideoInitialize.pBBox[0]) g_VideoInitialize.pBBox[0] = std::max(0.0f, o[0]);
if (o[0] > g_VideoInitialize.pBBox[1]) g_VideoInitialize.pBBox[1] = std::min(640.0f, o[0]);
if (o[1] < g_VideoInitialize.pBBox[2]) g_VideoInitialize.pBBox[2] = std::max(0.0f, o[1]);
if (o[1] > g_VideoInitialize.pBBox[3]) g_VideoInitialize.pBBox[3] = std::min(480.0f, o[1]);
/*
if (GetAsyncKeyState(VK_LSHIFT)) {
ERROR_LOG(VIDEO, "XForm: %f %f %f to %f %f", p[0], p[1], p[2], o[0], o[1]);
ERROR_LOG(VIDEO, "%i %i %i %i", g_VideoInitialize.pBBox[0], g_VideoInitialize.pBBox[1], g_VideoInitialize.pBBox[2], g_VideoInitialize.pBBox[3]);
}*/
}
void LOADERDECL TexMtx_ReadDirect_UByte()
{
s_curtexmtx[s_texmtxread] = DataReadU8() & 0x3f;
@ -247,6 +295,12 @@ void VertexLoader::CompileVertexTranslator()
break;
}
// OK, so we just got a point. Let's go back and read it for the bounding box.
#ifdef BBOX_SUPPORT
WriteCall(UpdateBoundingBox);
#endif
// Normals
vtx_decl.num_normals = 0;
if (m_VtxDesc.Normal != NOT_PRESENT) {