554 lines
15 KiB
C++
Executable File
554 lines
15 KiB
C++
Executable File
#include "precompiled.h"
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#include <assert.h>
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#include <set>
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#include <algorithm>
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#include "res/tex.h"
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#include "Renderer.h"
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#include "PatchRData.h"
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#include "AlphaMapCalculator.h"
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const int BlendOffsets[8][2] = {
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{ 0, -1 },
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{ -1, -1 },
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{ -1, 0 },
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{ -1, 1 },
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{ 0, 1 },
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{ 1, 1 },
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{ 1, 0 },
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{ 1, -1 }
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};
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CPatchRData::CPatchRData(CPatch* patch) : m_Patch(patch), m_Vertices(0), m_VBBase(0), m_VBBlends(0)
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{
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assert(patch);
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Build();
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}
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CPatchRData::~CPatchRData()
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{
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delete[] m_Vertices;
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if (m_VBBase) glDeleteBuffersARB(1,(GLuint*) &m_VBBase);
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if (m_VBBlends) glDeleteBuffersARB(1,(GLuint*) &m_VBBlends);
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}
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static Handle GetTerrainTileTexture(CTerrain* terrain,int gx,int gz)
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{
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CMiniPatch* mp=terrain->GetTile(gx,gz);
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return mp ? mp->Tex1 : 0;
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}
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bool QueryAdjacency(int x,int y,Handle h,Handle* texgrid)
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{
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for (int j=y-1;j<=y+1;j++) {
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for (int i=x-1;i<=x+1;i++) {
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if (i<0 || i>PATCH_SIZE+1 || j<0 || j>PATCH_SIZE+1) {
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continue;
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}
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if (texgrid[j*(PATCH_SIZE+2)+i]==h) {
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return true;
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}
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}
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}
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return false;
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}
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struct STmpSplat {
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Handle m_Texture;
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u16 m_Indices[4];
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};
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void CPatchRData::BuildBlends()
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{
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m_BlendIndices.clear();
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m_BlendSplats.clear();
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m_BlendVertices.clear();
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// get index of this patch
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int px=m_Patch->m_X;
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int pz=m_Patch->m_Z;
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CTerrain* terrain=m_Patch->m_Parent;
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// temporary list of splats
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std::vector<STmpSplat> splats;
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// set of textures used for splats
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std::set<Handle> splatTextures;
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// for each tile in patch ..
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for (int j=0;j<PATCH_SIZE;j++) {
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for (int i=0;i<PATCH_SIZE;i++) {
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u32 gx,gz;
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CMiniPatch* mp=&m_Patch->m_MiniPatches[j][i];
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mp->GetTileIndex(gx,gz);
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// build list of textures of higher priority than current tile that are used by neighbouring tiles
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std::vector<STex> neighbourTextures;
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for (int m=-1;m<=1;m++) {
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for (int k=-1;k<=1;k++) {
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CMiniPatch* nmp=terrain->GetTile(gx+k,gz+m);
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if (nmp) {
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if (nmp->Tex1Priority>mp->Tex1Priority || (nmp->Tex1Priority==mp->Tex1Priority && nmp->Tex1>mp->Tex1)) {
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STex tex;
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tex.m_Handle=nmp->Tex1;
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tex.m_Priority=nmp->Tex1Priority;
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if (std::find(neighbourTextures.begin(),neighbourTextures.end(),tex)==neighbourTextures.end()) {
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neighbourTextures.push_back(tex);
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}
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}
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}
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}
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}
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if (neighbourTextures.size()>0) {
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u32 count=neighbourTextures.size();
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// sort textures from lowest to highest priority
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std::sort(neighbourTextures.begin(),neighbourTextures.end());
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// for each of the neighbouring textures ..
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for (uint k=0;k<neighbourTextures.size();++k) {
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// now build the grid of blends dependent on whether the tile adjacent to the current tile
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// uses the current neighbour texture
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BlendShape8 shape;
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for (int m=0;m<8;m++) {
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int ox=gx+BlendOffsets[m][1];
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int oz=gz+BlendOffsets[m][0];
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// get texture on adjacent tile
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Handle atex=GetTerrainTileTexture(terrain,ox,oz);
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// fill 0/1 into shape array
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shape[m]=(atex==neighbourTextures[k].m_Handle) ? 0 : 1;
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}
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// calculate the required alphamap and the required rotation of the alphamap from blendshape
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unsigned int alphamapflags;
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int alphamap=CAlphaMapCalculator::Calculate(shape,alphamapflags);
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// now actually render the blend tile (if we need one)
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if (alphamap!=-1) {
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float u0=g_Renderer.m_AlphaMapCoords[alphamap].u0;
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float u1=g_Renderer.m_AlphaMapCoords[alphamap].u1;
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float v0=g_Renderer.m_AlphaMapCoords[alphamap].v0;
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float v1=g_Renderer.m_AlphaMapCoords[alphamap].v1;
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if (alphamapflags & BLENDMAP_FLIPU) {
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// flip u
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float t=u0;
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u0=u1;
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u1=t;
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}
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if (alphamapflags & BLENDMAP_FLIPV) {
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// flip v
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float t=v0;
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v0=v1;
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v1=t;
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}
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int base=0;
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if (alphamapflags & BLENDMAP_ROTATE90) {
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// rotate 1
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base=1;
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} else if (alphamapflags & BLENDMAP_ROTATE180) {
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// rotate 2
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base=2;
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} else if (alphamapflags & BLENDMAP_ROTATE270) {
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// rotate 3
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base=3;
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}
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SBlendVertex vtx[4];
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vtx[(base+0)%4].m_AlphaUVs[0]=u0;
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vtx[(base+0)%4].m_AlphaUVs[1]=v0;
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vtx[(base+1)%4].m_AlphaUVs[0]=u1;
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vtx[(base+1)%4].m_AlphaUVs[1]=v0;
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vtx[(base+2)%4].m_AlphaUVs[0]=u1;
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vtx[(base+2)%4].m_AlphaUVs[1]=v1;
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vtx[(base+3)%4].m_AlphaUVs[0]=u0;
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vtx[(base+3)%4].m_AlphaUVs[1]=v1;
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int vsize=PATCH_SIZE+1;
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SBlendVertex dst;
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int vindex=m_BlendVertices.size();
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const SBaseVertex& vtx0=m_Vertices[(j*vsize)+i];
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dst.m_UVs[0]=i*0.125f;
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dst.m_UVs[1]=j*0.125f;
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dst.m_AlphaUVs[0]=vtx[0].m_AlphaUVs[0];
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dst.m_AlphaUVs[1]=vtx[0].m_AlphaUVs[1];
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dst.m_Color=vtx0.m_Color;
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dst.m_Position=vtx0.m_Position;
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m_BlendVertices.push_back(dst);
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const SBaseVertex& vtx1=m_Vertices[(j*vsize)+i+1];
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dst.m_UVs[0]=(i+1)*0.125f;
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dst.m_UVs[1]=j*0.125f;
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dst.m_AlphaUVs[0]=vtx[1].m_AlphaUVs[0];
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dst.m_AlphaUVs[1]=vtx[1].m_AlphaUVs[1];
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dst.m_Color=vtx1.m_Color;
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dst.m_Position=vtx1.m_Position;
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m_BlendVertices.push_back(dst);
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const SBaseVertex& vtx2=m_Vertices[((j+1)*vsize)+i+1];
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dst.m_UVs[0]=(i+1)*0.125f;
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dst.m_UVs[1]=(j+1)*0.125f;
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dst.m_AlphaUVs[0]=vtx[2].m_AlphaUVs[0];
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dst.m_AlphaUVs[1]=vtx[2].m_AlphaUVs[1];
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dst.m_Color=vtx2.m_Color;
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dst.m_Position=vtx2.m_Position;
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m_BlendVertices.push_back(dst);
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const SBaseVertex& vtx3=m_Vertices[((j+1)*vsize)+i];
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dst.m_UVs[0]=i*0.125f;
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dst.m_UVs[1]=(j+1)*0.125f;
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dst.m_AlphaUVs[0]=vtx[3].m_AlphaUVs[0];
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dst.m_AlphaUVs[1]=vtx[3].m_AlphaUVs[1];
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dst.m_Color=vtx3.m_Color;
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dst.m_Position=vtx3.m_Position;
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m_BlendVertices.push_back(dst);
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// build a splat for this quad
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STmpSplat splat;
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splat.m_Texture=neighbourTextures[k].m_Handle;
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splat.m_Indices[0]=vindex;
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splat.m_Indices[1]=vindex+1;
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splat.m_Indices[2]=vindex+2;
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splat.m_Indices[3]=vindex+3;
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splats.push_back(splat);
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// add this texture to set of unique splat textures
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splatTextures.insert(splat.m_Texture);
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}
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}
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}
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}
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}
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// now build outgoing splats
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m_BlendSplats.resize(splatTextures.size());
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int splatCount=0;
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std::set<Handle>::iterator iter=splatTextures.begin();
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for (;iter!=splatTextures.end();++iter) {
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Handle tex=*iter;
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SSplat& splat=m_BlendSplats[splatCount];
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splat.m_IndexStart=m_BlendIndices.size();
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splat.m_Texture=tex;
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for (uint k=0;k<splats.size();k++) {
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if (splats[k].m_Texture==tex) {
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m_BlendIndices.push_back(splats[k].m_Indices[0]);
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m_BlendIndices.push_back(splats[k].m_Indices[1]);
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m_BlendIndices.push_back(splats[k].m_Indices[2]);
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m_BlendIndices.push_back(splats[k].m_Indices[3]);
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splat.m_IndexCount+=4;
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}
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}
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splatCount++;
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}
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if (g_Renderer.m_Caps.m_VBO) {
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if (m_VBBlends) {
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// destroy old buffer
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glDeleteBuffersARB(1,(GLuint*) &m_VBBlends);
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} else {
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// generate buffer index
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glGenBuffersARB(1,(GLuint*) &m_VBBlends);
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}
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// create new buffer
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glBindBufferARB(GL_ARRAY_BUFFER_ARB,m_VBBlends);
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glBufferDataARB(GL_ARRAY_BUFFER_ARB,m_BlendVertices.size()*sizeof(SBlendVertex),&m_BlendVertices[0],GL_STATIC_DRAW_ARB);
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}
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}
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void CPatchRData::BuildIndices()
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{
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// number of vertices in each direction in each patch
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int vsize=PATCH_SIZE+1;
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// release existing indices and bins
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m_Indices.clear();
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m_Splats.clear();
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// build grid of textures on this patch and boundaries of adjacent patches
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std::vector<Handle> textures;
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Handle texgrid[PATCH_SIZE][PATCH_SIZE];
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for (int j=0;j<PATCH_SIZE;j++) {
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for (int i=0;i<PATCH_SIZE;i++) {
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Handle h=m_Patch->m_MiniPatches[j][i].Tex1;
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texgrid[j][i]=h;
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if (std::find(textures.begin(),textures.end(),h)==textures.end()) {
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textures.push_back(h);
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}
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}
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}
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// now build base splats from interior textures
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m_Splats.resize(textures.size());
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for (uint i=0;i<m_Splats.size();i++) {
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Handle h=textures[i];
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SSplat& splat=m_Splats[i];
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splat.m_Texture=h;
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splat.m_IndexStart=m_Indices.size();
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for (int j=0;j<PATCH_SIZE;j++) {
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for (int i=0;i<PATCH_SIZE;i++) {
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if (texgrid[j][i]==h){
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m_Indices.push_back(((j+0)*vsize+(i+0)));
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m_Indices.push_back(((j+0)*vsize+(i+1)));
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m_Indices.push_back(((j+1)*vsize+(i+1)));
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m_Indices.push_back(((j+1)*vsize+(i+0)));
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}
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}
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}
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splat.m_IndexCount=m_Indices.size()-splat.m_IndexStart;
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}
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}
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inline int clamp(int x,int min,int max)
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{
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if (x<min) return min;
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else if (x>max) return max;
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else return x;
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}
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static SColor4ub ConvertColor(const RGBColor& src)
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{
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SColor4ub result;
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result.R=clamp(int(src.X*255),0,255);
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result.G=clamp(int(src.Y*255),0,255);
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result.B=clamp(int(src.Z*255),0,255);
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result.A=0xff;
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return result;
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}
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static void BuildHeightmapNormals(int size,u16 *heightmap,CVector3D* normals)
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{
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int x, y;
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int sm=size-1;
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for(y = 0;y < size; y++)
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for(x = 0; x < size; x++) {
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// Access current normalmap grid point
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CVector3D* N = &normals[y*size+x];
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// Compute normal by using the height differential
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u16 h1=(x==sm) ? heightmap[y*size+x] : heightmap[y*size+x+1];
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u16 h2=(y==sm) ? heightmap[y*size+x] : heightmap[(y+1)*size+x];
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u16 h3=(x==0) ? heightmap[y*size+x] : heightmap[y*size+x-1];
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u16 h4=(y==0) ? heightmap[y*size+x] : heightmap[(y-1)*size+x+1];
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N->X = (h3-h1)*HEIGHT_SCALE;
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N->Y = CELL_SIZE;
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N->Z = (h4-h2)*HEIGHT_SCALE;
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// Normalize it
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float len=N->GetLength();
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if (len>0) {
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(*N)*=1.0f/len;
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} else {
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*N=CVector3D(0,0,0);
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}
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}
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}
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void CPatchRData::BuildVertices()
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{
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// number of vertices in each direction in each patch
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int vsize=PATCH_SIZE+1;
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if (!m_Vertices) {
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m_Vertices=new SBaseVertex[vsize*vsize];
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}
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SBaseVertex* vertices=m_Vertices;
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// get index of this patch
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u32 px=m_Patch->m_X;
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u32 pz=m_Patch->m_Z;
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CTerrain* terrain=m_Patch->m_Parent;
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u32 mapSize=terrain->GetVerticesPerSide();
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// build vertices
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for (int j=0; j<vsize; j++)
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{
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for (int i=0; i<vsize; i++)
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{
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int ix=px*16+i;
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int iz=pz*16+j;
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CVector3D pos,normal;
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terrain->CalcPosition(ix,iz,pos);
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terrain->CalcNormal(ix,iz,normal);
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RGBColor c;
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g_Renderer.m_SHCoeffsTerrain.Evaluate(normal,c);
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int v=(j*vsize)+i;
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vertices[v].m_UVs[0]=i*0.125f;
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vertices[v].m_UVs[1]=j*0.125f;
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vertices[v].m_Color=ConvertColor(c);
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vertices[v].m_Position=pos;
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}
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}
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if (g_Renderer.m_Caps.m_VBO) {
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if (!m_VBBase) {
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glGenBuffersARB(1,(GLuint*) &m_VBBase);
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glBindBufferARB(GL_ARRAY_BUFFER_ARB,m_VBBase);
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glBufferDataARB(GL_ARRAY_BUFFER_ARB,vsize*vsize*sizeof(SBaseVertex),0,GL_STATIC_DRAW_ARB);
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}
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glBindBufferARB(GL_ARRAY_BUFFER_ARB,m_VBBase);
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glBufferSubDataARB(GL_ARRAY_BUFFER_ARB,0,vsize*vsize*sizeof(SBaseVertex),m_Vertices);
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}
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}
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void CPatchRData::Build()
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{
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BuildVertices();
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BuildIndices();
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BuildBlends();
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}
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void CPatchRData::Update()
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{
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if (m_UpdateFlags!=0) {
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// TODO,RC 11/04/04 - need to only rebuild necessary bits of renderdata rather
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// than everything; it's complicated slightly because the blends are dependent
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// on both vertex and index data
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BuildVertices();
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BuildIndices();
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BuildBlends();
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m_UpdateFlags=0;
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}
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}
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void CPatchRData::RenderBase()
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{
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assert(m_UpdateFlags==0);
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u8* base;
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if (g_Renderer.m_Caps.m_VBO) {
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glBindBufferARB(GL_ARRAY_BUFFER_ARB,m_VBBase);
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base=0;
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} else {
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base=(u8*) &m_Vertices[0];
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}
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// setup data pointers
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u32 stride=sizeof(SBaseVertex);
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glVertexPointer(3,GL_FLOAT,stride,base+offsetof(SBaseVertex,m_Position));
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glColorPointer(4,GL_UNSIGNED_BYTE,stride,base+offsetof(SBaseVertex,m_Color));
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glTexCoordPointer(2,GL_FLOAT,stride,base+offsetof(SBaseVertex,m_UVs[0]));
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// render each splat
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for (uint i=0;i<m_Splats.size();i++) {
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SSplat& splat=m_Splats[i];
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g_Renderer.BindTexture(0,tex_id(splat.m_Texture));
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glDrawElements(GL_QUADS,splat.m_IndexCount,GL_UNSIGNED_SHORT,&m_Indices[splat.m_IndexStart]);
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// bump stats
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g_Renderer.m_Stats.m_DrawCalls++;
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g_Renderer.m_Stats.m_TerrainTris+=splat.m_IndexCount/2;
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}
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}
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void CPatchRData::RenderStreams(u32 streamflags)
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{
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assert(m_UpdateFlags==0);
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u8* base;
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if (g_Renderer.m_Caps.m_VBO) {
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glBindBufferARB(GL_ARRAY_BUFFER_ARB,m_VBBase);
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base=0;
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} else {
|
|
base=(u8*) &m_Vertices[0];
|
|
}
|
|
|
|
// setup data pointers
|
|
glVertexPointer(3,GL_FLOAT,sizeof(SBaseVertex),base+offsetof(SBaseVertex,m_Position));
|
|
if (streamflags & STREAM_UV0) glTexCoordPointer(2,GL_FLOAT,sizeof(SBaseVertex),base+offsetof(SBaseVertex,m_UVs));
|
|
else if (streamflags & STREAM_POSTOUV0) glTexCoordPointer(3,GL_FLOAT,sizeof(SBaseVertex),base+offsetof(SBaseVertex,m_Position));
|
|
|
|
// render all base splats at once
|
|
glDrawElements(GL_QUADS,m_Indices.size(),GL_UNSIGNED_SHORT,&m_Indices[0]);
|
|
|
|
// bump stats
|
|
g_Renderer.m_Stats.m_DrawCalls++;
|
|
g_Renderer.m_Stats.m_TerrainTris+=m_Indices.size()/2;
|
|
}
|
|
|
|
|
|
void CPatchRData::RenderBlends()
|
|
{
|
|
assert(m_UpdateFlags==0);
|
|
|
|
if (m_BlendVertices.size()==0) return;
|
|
|
|
u8* base;
|
|
if (g_Renderer.m_Caps.m_VBO) {
|
|
glBindBufferARB(GL_ARRAY_BUFFER_ARB,m_VBBlends);
|
|
base=0;
|
|
} else {
|
|
base=(u8*) &m_BlendVertices[0];
|
|
}
|
|
|
|
|
|
// setup data pointers
|
|
u32 stride=sizeof(SBlendVertex);
|
|
glVertexPointer(3,GL_FLOAT,stride,base+offsetof(SBlendVertex,m_Position));
|
|
glColorPointer(4,GL_UNSIGNED_BYTE,stride,base+offsetof(SBlendVertex,m_Color));
|
|
|
|
glClientActiveTexture(GL_TEXTURE0_ARB);
|
|
glTexCoordPointer(2,GL_FLOAT,stride,base+offsetof(SBlendVertex,m_UVs[0]));
|
|
|
|
glClientActiveTexture(GL_TEXTURE1_ARB);
|
|
glTexCoordPointer(2,GL_FLOAT,stride,base+offsetof(SBlendVertex,m_AlphaUVs[0]));
|
|
|
|
for (uint i=0;i<m_BlendSplats.size();i++) {
|
|
SSplat& splat=m_BlendSplats[i];
|
|
g_Renderer.BindTexture(0,tex_id(splat.m_Texture));
|
|
glDrawElements(GL_QUADS,splat.m_IndexCount,GL_UNSIGNED_SHORT,&m_BlendIndices[splat.m_IndexStart]);
|
|
|
|
// bump stats
|
|
g_Renderer.m_Stats.m_DrawCalls++;
|
|
g_Renderer.m_Stats.m_BlendSplats++;
|
|
g_Renderer.m_Stats.m_TerrainTris+=splat.m_IndexCount/2;
|
|
}
|
|
}
|
|
|
|
void CPatchRData::RenderOutline()
|
|
{
|
|
const u16 EdgeIndices[PATCH_SIZE*4] = {
|
|
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
|
|
33, 50, 67, 84, 101, 118, 135, 152, 169, 186, 203, 220, 237, 254, 271, 288,
|
|
287, 286, 285, 284, 283, 282, 281, 280, 279, 278, 277, 276, 275, 274, 273, 272,
|
|
255, 238, 221, 204, 187, 170, 153, 136, 119, 102, 85, 68, 51, 34, 17, 0
|
|
};
|
|
|
|
u8* base;
|
|
if (g_Renderer.m_Caps.m_VBO) {
|
|
glBindBufferARB(GL_ARRAY_BUFFER_ARB,m_VBBase);
|
|
base=0;
|
|
} else {
|
|
base=(u8*) &m_Vertices[0];
|
|
}
|
|
|
|
// setup data pointers
|
|
glVertexPointer(3,GL_FLOAT,sizeof(SBaseVertex),base+offsetof(SBaseVertex,m_Position));
|
|
// render outline as line loop
|
|
u32 numIndices=sizeof(EdgeIndices)/sizeof(u16);
|
|
glDrawElements(GL_LINE_LOOP,numIndices,GL_UNSIGNED_SHORT,EdgeIndices);
|
|
|
|
g_Renderer.m_Stats.m_DrawCalls++;
|
|
g_Renderer.m_Stats.m_TerrainTris+=numIndices/2;
|
|
}
|