495 lines
16 KiB
C++
495 lines
16 KiB
C++
// Copyright (C) 2003-2009 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "Common.h"
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#include <math.h>
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#include "TransformUnit.h"
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#include "XFMemLoader.h"
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#include "CPMemLoader.h"
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#include "BPMemLoader.h"
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#include "NativeVertexFormat.h"
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#include "Vec3.h"
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namespace TransformUnit
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{
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void MultiplyVec2Mat24(const Vec3 &vec, const float *mat, Vec3 &result)
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{
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result.x = mat[0] * vec.x + mat[1] * vec.y + mat[2] + mat[3];
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result.y = mat[4] * vec.x + mat[5] * vec.y + mat[6] + mat[7];
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}
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void MultiplyVec2Mat34(const Vec3 &vec, const float *mat, Vec3 &result)
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{
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result.x = mat[0] * vec.x + mat[1] * vec.y + mat[2] + mat[3];
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result.y = mat[4] * vec.x + mat[5] * vec.y + mat[6] + mat[7];
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result.z = mat[8] * vec.x + mat[9] * vec.y + mat[10] + mat[11];
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}
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void MultiplyVec3Mat33(const Vec3 &vec, const float *mat, Vec3 &result)
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{
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result.x = mat[0] * vec.x + mat[1] * vec.y + mat[2] * vec.z;
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result.y = mat[3] * vec.x + mat[4] * vec.y + mat[5] * vec.z;
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result.z = mat[6] * vec.x + mat[7] * vec.y + mat[8] * vec.z;
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}
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void MultiplyVec3Mat34(const Vec3 &vec, const float *mat, Vec3 &result)
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{
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result.x = mat[0] * vec.x + mat[1] * vec.y + mat[2] * vec.z + mat[3];
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result.y = mat[4] * vec.x + mat[5] * vec.y + mat[6] * vec.z + mat[7];
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result.z = mat[8] * vec.x + mat[9] * vec.y + mat[10] * vec.z + mat[11];
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}
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void MultipleVec3Perspective(const Vec3 &vec, const float *proj, Vec4 &result)
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{
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result.x = proj[0] * vec.x + proj[1] * vec.z;
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result.y = proj[2] * vec.y + proj[3] * vec.z;
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//result.z = (proj[4] * vec.z + proj[5]);
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result.z = (proj[4] * vec.z + proj[5]) * (1.0f - (float)1e-7);
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result.w = -vec.z;
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}
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void MultipleVec3Ortho(const Vec3 &vec, const float *proj, Vec4 &result)
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{
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result.x = proj[0] * vec.x + proj[1];
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result.y = proj[2] * vec.y + proj[3];
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result.z = proj[4] * vec.z + proj[5];
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result.w = 1;
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}
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void TransformPosition(const InputVertexData *src, OutputVertexData *dst)
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{
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const float* mat = (const float*)&xfregs.posMatrices[src->posMtx * 4];
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MultiplyVec3Mat34(src->position, mat, dst->mvPosition);
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if (xfregs.projection[6] == 0)
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{
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MultipleVec3Perspective(dst->mvPosition, xfregs.projection, dst->projectedPosition);
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}
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else
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{
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MultipleVec3Ortho(dst->mvPosition, xfregs.projection, dst->projectedPosition);
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}
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}
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void TransformNormal(const InputVertexData *src, bool nbt, OutputVertexData *dst)
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{
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const float* mat = (const float*)&xfregs.normalMatrices[(src->posMtx & 31) * 3];
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if (nbt)
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{
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MultiplyVec3Mat33(src->normal[0], mat, dst->normal[0]);
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MultiplyVec3Mat33(src->normal[1], mat, dst->normal[1]);
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MultiplyVec3Mat33(src->normal[2], mat, dst->normal[2]);
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dst->normal[0].normalize();
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}
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else
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{
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MultiplyVec3Mat33(src->normal[0], mat, dst->normal[0]);
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dst->normal[0].normalize();
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}
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}
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inline void TransformTexCoordRegular(const TexMtxInfo &texinfo, int coordNum, bool specialCase, const InputVertexData *srcVertex, OutputVertexData *dstVertex)
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{
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const Vec3 *src;
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switch (texinfo.sourcerow)
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{
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case XF_SRCGEOM_INROW:
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src = &srcVertex->position;
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break;
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case XF_SRCNORMAL_INROW:
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src = &srcVertex->normal[0];
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break;
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case XF_SRCBINORMAL_T_INROW:
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src = &srcVertex->normal[1];
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break;
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case XF_SRCBINORMAL_B_INROW:
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src = &srcVertex->normal[2];
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break;
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default:
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_assert_(texinfo.sourcerow >= XF_SRCTEX0_INROW && texinfo.sourcerow <= XF_SRCTEX7_INROW);
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src = (Vec3*)srcVertex->texCoords[texinfo.sourcerow - XF_SRCTEX0_INROW];
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break;
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}
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const float *mat = (const float*)&xfregs.posMatrices[srcVertex->texMtx[coordNum] * 4];
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Vec3 *dst = &dstVertex->texCoords[coordNum];
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if (texinfo.inputform == XF_TEXINPUT_AB11)
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{
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MultiplyVec2Mat34(*src, mat, *dst);
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}
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else
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{
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MultiplyVec3Mat34(*src, mat, *dst);
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}
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if (xfregs.dualTexTrans)
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{
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Vec3 tempCoord;
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// normalize
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const PostMtxInfo &postInfo = xfregs.postMtxInfo[coordNum];
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const float *postMat = (const float*)&xfregs.postMatrices[postInfo.index * 4];
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if (specialCase)
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{
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// no normalization
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// q of input is 1
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// q of output is unknown
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tempCoord.x = dst->x;
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tempCoord.y = dst->y;
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dst->x = postMat[0] * tempCoord.x + postMat[1] * tempCoord.y + postMat[2] + postMat[3];
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dst->y = postMat[4] * tempCoord.x + postMat[5] * tempCoord.y + postMat[6] + postMat[7];
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dst->z = 1.0f;
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}
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else
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{
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if (postInfo.normalize)
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tempCoord = dst->normalized();
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else
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tempCoord = *dst;
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MultiplyVec3Mat34(tempCoord, postMat, *dst);
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}
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}
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}
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struct LightPointer
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{
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u32 reserved[3];
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u8 color[4];
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Vec3 cosatt;
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Vec3 distatt;
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Vec3 pos;
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Vec3 dir;
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};
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inline void AddIntegerColor(const u8 *src, Vec3 &dst)
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{
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dst.x += src[1];
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dst.y += src[2];
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dst.z += src[3];
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}
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inline void AddScaledIntegerColor(const u8 *src, float scale, Vec3 &dst)
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{
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dst.x += src[1] * scale;
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dst.y += src[2] * scale;
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dst.z += src[3] * scale;
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}
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inline float Clamp(float val, float a, float b)
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{
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return val<a?a:val>b?b:val;
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}
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inline float SafeDivide(float n, float d)
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{
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return (d==0)?(n>0?1:0):n/d;
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}
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void LightColor(const Vec3 &pos, const Vec3 &normal, u8 lightNum, const LitChannel &chan, Vec3 &lightCol)
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{
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const LightPointer *light = (const LightPointer*)&xfregs.lights[0x10*lightNum];
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if (!(chan.attnfunc & 1)) {
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// atten disabled
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switch (chan.diffusefunc) {
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case LIGHTDIF_NONE:
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AddIntegerColor(light->color, lightCol);
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break;
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case LIGHTDIF_SIGN:
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{
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Vec3 ldir = (light->pos - pos).normalized();
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float diffuse = ldir * normal;
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AddScaledIntegerColor(light->color, diffuse, lightCol);
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}
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break;
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case LIGHTDIF_CLAMP:
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{
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Vec3 ldir = (light->pos - pos).normalized();
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float diffuse = max(0.0f, ldir * normal);
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AddScaledIntegerColor(light->color, diffuse, lightCol);
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}
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break;
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default: _assert_(0);
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}
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}
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else { // spec and spot
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// not sure about divide by zero checks
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Vec3 ldir = light->pos - pos;
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float attn;
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if (chan.attnfunc == 3) { // spot
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float dist2 = ldir.length2();
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float dist = sqrtf(dist2);
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ldir = ldir / dist;
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attn = max(0.0f, ldir * light->dir);
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float cosAtt = light->cosatt.x + (light->cosatt.y * attn) + (light->cosatt.z * attn * attn);
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float distAtt = light->distatt.x + (light->distatt.y * dist) + (light->distatt.z * dist2);
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attn = SafeDivide(max(0.0f, cosAtt), distAtt);
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}
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else if (chan.attnfunc == 1) { // specular
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// donko - what is going on here? 655.36 is a guess but seems about right.
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attn = (light->pos * normal) > -655.36 ? max(0.0f, (light->dir * normal)) : 0;
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ldir.set(1.0f, attn, attn * attn);
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float cosAtt = max(0.0f, light->cosatt * ldir);
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float distAtt = light->distatt * ldir;
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attn = SafeDivide(max(0.0f, cosAtt), distAtt);
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} else {
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PanicAlert("LightColor");
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return;
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}
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switch (chan.diffusefunc) {
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case LIGHTDIF_NONE:
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AddScaledIntegerColor(light->color, attn, lightCol);
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break;
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case LIGHTDIF_SIGN:
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{
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float difAttn = ldir * normal;
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AddScaledIntegerColor(light->color, attn * difAttn, lightCol);
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}
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break;
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case LIGHTDIF_CLAMP:
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{
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float difAttn = max(0.0f, ldir * normal);
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AddScaledIntegerColor(light->color, attn * difAttn, lightCol);
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}
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break;
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default: _assert_(0);
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}
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}
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}
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void LightAlpha(const Vec3 &pos, const Vec3 &normal, u8 lightNum, const LitChannel &chan, float &lightCol)
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{
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const LightPointer *light = (const LightPointer*)&xfregs.lights[0x10*lightNum];
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if (!(chan.attnfunc & 1)) {
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// atten disabled
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switch (chan.diffusefunc) {
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case LIGHTDIF_NONE:
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lightCol += light->color[0];
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break;
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case LIGHTDIF_SIGN:
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{
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Vec3 ldir = (light->pos - pos).normalized();
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float diffuse = ldir * normal;
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lightCol += light->color[0] * diffuse;
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}
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break;
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case LIGHTDIF_CLAMP:
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{
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Vec3 ldir = (light->pos - pos).normalized();
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float diffuse = max(0.0f, ldir * normal);
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lightCol += light->color[0] * diffuse;
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}
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break;
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default: _assert_(0);
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}
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}
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else { // spec and spot
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Vec3 ldir = light->pos - pos;
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float attn;
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if (chan.attnfunc == 3) { // spot
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float dist2 = ldir.length2();
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float dist = sqrtf(dist2);
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ldir = ldir / dist;
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attn = max(0.0f, ldir * light->dir);
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float cosAtt = light->cosatt.x + (light->cosatt.y * attn) + (light->cosatt.z * attn * attn);
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float distAtt = light->distatt.x + (light->distatt.y * dist) + (light->distatt.z * dist2);
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attn = SafeDivide(max(0.0f, cosAtt), distAtt);
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}
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else /* if (chan.attnfunc == 1) */ { // specular
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// donko - what is going on here? 655.36 is a guess but seems about right.
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attn = (light->pos * normal) > -655.36 ? max(0.0f, (light->dir * normal)) : 0;
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ldir.set(1.0f, attn, attn * attn);
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float cosAtt = light->cosatt * ldir;
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float distAtt = light->distatt * ldir;
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attn = SafeDivide(max(0.0f, cosAtt), distAtt);
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}
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switch (chan.diffusefunc) {
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case LIGHTDIF_NONE:
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lightCol += light->color[0] * attn;
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break;
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case LIGHTDIF_SIGN:
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{
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float difAttn = ldir * normal;
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lightCol += light->color[0] * attn * difAttn;
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}
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break;
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case LIGHTDIF_CLAMP:
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{
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float difAttn = max(0.0f, ldir * normal);
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lightCol += light->color[0] * attn * difAttn;
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}
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break;
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default: _assert_(0);
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}
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}
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}
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void TransformColor(const InputVertexData *src, OutputVertexData *dst)
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{
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for (u32 chan = 0; chan < xfregs.nNumChans; chan++)
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{
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// abgr
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u8 matcolor[4];
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u8 chancolor[4];
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// color
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LitChannel &colorchan = xfregs.color[chan];
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if (colorchan.matsource)
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*(u32*)matcolor = *(u32*)src->color[chan]; // vertex
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else
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*(u32*)matcolor = xfregs.matColor[chan];
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if (colorchan.enablelighting)
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{
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Vec3 lightCol;
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if (colorchan.ambsource)
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{
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// vertex
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lightCol.x = src->color[chan][1];
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lightCol.y = src->color[chan][2];
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lightCol.z = src->color[chan][3];
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}
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else
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{
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u8 *ambColor = (u8*)&xfregs.ambColor[chan];
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lightCol.x = ambColor[1];
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lightCol.y = ambColor[2];
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lightCol.z = ambColor[3];
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}
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u8 mask = colorchan.GetFullLightMask();
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for (int i = 0; i < 8; ++i) {
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if (mask&(1<<i))
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LightColor(dst->mvPosition, dst->normal[0], i, colorchan, lightCol);
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}
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float inv = 1.0f / 255.0f;
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chancolor[1] = (u8)(matcolor[1] * Clamp(lightCol.x * inv, 0.0f, 1.0f));
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chancolor[2] = (u8)(matcolor[2] * Clamp(lightCol.y * inv, 0.0f, 1.0f));
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chancolor[3] = (u8)(matcolor[3] * Clamp(lightCol.z * inv, 0.0f, 1.0f));
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}
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else
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{
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*(u32*)chancolor = *(u32*)matcolor;
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}
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// alpha
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LitChannel &alphachan = xfregs.alpha[chan];
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if (alphachan.matsource)
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matcolor[0] = src->color[chan][0]; // vertex
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else
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matcolor[0] = xfregs.matColor[chan] & 0xff;
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if (xfregs.alpha[chan].enablelighting)
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{
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float lightCol;
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if (alphachan.ambsource)
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lightCol = src->color[chan][0]; // vertex
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else
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lightCol = (float)(xfregs.ambColor[chan] & 0xff);
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u8 mask = alphachan.GetFullLightMask();
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for (int i = 0; i < 8; ++i) {
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if (mask&(1<<i))
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LightAlpha(dst->mvPosition, dst->normal[0], i, alphachan, lightCol);
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}
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chancolor[0] = (u8)(matcolor[0] * Clamp(lightCol / 255.0f, 0.0f, 1.0f));
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}
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else
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{
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chancolor[0] = matcolor[0];
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}
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// abgr -> rgba
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*(u32*)dst->color[chan] = Common::swap32(*(u32*)chancolor);
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}
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}
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void TransformTexCoord(const InputVertexData *src, OutputVertexData *dst, bool specialCase)
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{
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for (u32 coordNum = 0; coordNum < xfregs.numTexGens; coordNum++)
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{
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const TexMtxInfo &texinfo = xfregs.texMtxInfo[coordNum];
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switch (texinfo.texgentype)
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{
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case XF_TEXGEN_REGULAR:
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TransformTexCoordRegular(texinfo, coordNum, specialCase, src, dst);
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break;
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case XF_TEXGEN_EMBOSS_MAP:
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{
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const LightPointer *light = (const LightPointer*)&xfregs.lights[0x10*texinfo.embosslightshift];
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Vec3 ldir = (light->pos - dst->mvPosition).normalized();
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float d1 = ldir * dst->normal[1];
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float d2 = ldir * dst->normal[2];
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dst->texCoords[coordNum].x = dst->texCoords[texinfo.embosssourceshift].x + d1;
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dst->texCoords[coordNum].y = dst->texCoords[texinfo.embosssourceshift].y + d2;
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dst->texCoords[coordNum].z = dst->texCoords[texinfo.embosssourceshift].z;
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}
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break;
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case XF_TEXGEN_COLOR_STRGBC0:
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_assert_(texinfo.sourcerow == XF_SRCCOLORS_INROW);
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_assert_(texinfo.inputform == XF_TEXINPUT_AB11);
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dst->texCoords[coordNum].x = (float)dst->color[0][0] / 255.0f;
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dst->texCoords[coordNum].y = (float)dst->color[0][1] / 255.0f;
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dst->texCoords[coordNum].z = 1.0f;
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break;
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case XF_TEXGEN_COLOR_STRGBC1:
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_assert_(texinfo.sourcerow == XF_SRCCOLORS_INROW);
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_assert_(texinfo.inputform == XF_TEXINPUT_AB11);
|
|
dst->texCoords[coordNum].x = (float)dst->color[1][0] / 255.0f;
|
|
dst->texCoords[coordNum].y = (float)dst->color[1][1] / 255.0f;
|
|
dst->texCoords[coordNum].z = 1.0f;
|
|
break;
|
|
default:
|
|
ERROR_LOG(VIDEO, "Bad tex gen type %i", texinfo.texgentype);
|
|
}
|
|
}
|
|
|
|
for (u32 coordNum = 0; coordNum < xfregs.numTexGens; coordNum++)
|
|
{
|
|
dst->texCoords[coordNum][0] *= (bpmem.texcoords[coordNum].s.scale_minus_1 + 1);
|
|
dst->texCoords[coordNum][1] *= (bpmem.texcoords[coordNum].t.scale_minus_1 + 1);
|
|
}
|
|
}
|
|
|
|
}
|