269 lines
7.1 KiB
C++
269 lines
7.1 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2018 Marisa Kirisame
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// All rights reserved.
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//
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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 Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see http://www.gnu.org/licenses/
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//
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//--------------------------------------------------------------------------
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//
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#include "w_wad.h"
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#include "cmdlib.h"
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#include "r_data/models/models_ue1.h"
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float unpackuvert( uint32_t n, int c )
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{
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switch( c )
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{
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case 2:
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return ((int16_t)((n&0x7ff)<<5))/127.f;
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case 1:
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return ((int16_t)(((n>>11)&0x7ff)<<5))/127.f;
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case 0:
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return ((int16_t)(((n>>22)&0x3ff)<<6))/127.f;
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default:
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return 0.f;
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}
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}
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bool FUE1Model::Load( const char *filename, int lumpnum, const char *buffer, int length )
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{
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mLumpNum = lumpnum;
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int lumpnum2;
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FMemLump lump2;
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const char *buffer2;
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FString realfilename = Wads.GetLumpFullName(lumpnum);
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if ( realfilename.IndexOf("_d.3d") == realfilename.Len()-5 )
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{
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realfilename.Substitute("_d.3d","_a.3d");
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lumpnum2 = Wads.CheckNumForFullName(realfilename);
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lump2 = Wads.ReadLump(lumpnum2);
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buffer2 = (char*)lump2.GetMem();
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// map structures
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dhead = (d3dhead*)(buffer);
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dpolys = (d3dpoly*)(buffer+sizeof(d3dhead));
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ahead = (a3dhead*)(buffer2);
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averts = (uint32_t*)(buffer2+sizeof(a3dhead));
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}
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else
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{
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realfilename.Substitute("_a.3d","_d.3d");
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lumpnum2 = Wads.CheckNumForFullName(realfilename);
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lump2 = Wads.ReadLump(lumpnum2);
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buffer2 = (char*)lump2.GetMem();
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// map structures
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dhead = (d3dhead*)(buffer2);
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dpolys = (d3dpoly*)(buffer2+sizeof(d3dhead));
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ahead = (a3dhead*)(buffer);
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averts = (uint32_t*)(buffer+sizeof(a3dhead));
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}
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// set counters
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numVerts = dhead->numverts;
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numFrames = ahead->numframes;
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numPolys = dhead->numpolys;
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numGroups = 0;
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groupIndices.Reset();
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uint8_t used[256] = {0};
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for ( int i=0; i<numPolys; i++ )
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used[dpolys[i].texnum] = 1;
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for ( int i=0; i<256; i++ )
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{
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if ( !used[i] ) continue;
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groupIndices.Push(i);
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numGroups++;
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}
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LoadGeometry();
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return true;
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}
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void FUE1Model::LoadGeometry()
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{
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// populate vertex arrays
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for ( int i=0; i<numFrames; i++ )
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{
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for ( int j=0; j<numVerts; j++ )
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{
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UE1Vertex Vert;
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// unpack position
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Vert.Pos.X = unpackuvert(averts[j+i*numVerts],0);
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Vert.Pos.Y = unpackuvert(averts[j+i*numVerts],1);
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Vert.Pos.Z = unpackuvert(averts[j+i*numVerts],2);
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// push vertex (without normals, will be calculated later)
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verts.Push(Vert);
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}
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}
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// populate poly arrays
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for ( int i=0; i<numPolys; i++ )
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{
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UE1Poly Poly;
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// set indices
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for ( int j=0; j<3; j++ )
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Poly.V[j] = dpolys[i].vertices[j];
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// unpack coords
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for ( int j=0; j<3; j++ )
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{
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Poly.C[j].S = dpolys[i].uv[j][0]/255.;
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Poly.C[j].T = dpolys[i].uv[j][1]/255.;
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}
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Poly.texNum = dpolys[i].texnum;
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// push
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polys.Push(Poly);
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}
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// compute normals for vertex arrays
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// iterates through all polys and compute the average of all facet normals
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// from those who use this vertex. not pretty, but does the job
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for ( int i=0; i<numFrames; i++ )
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{
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for ( int j=0; j<numVerts; j++ )
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{
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UE1Vector nsum = {0,0,0};
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double total = 0.;
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for ( int k=0; k<numPolys; k++ )
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{
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if ( (polys[k].V[0] != j) && (polys[k].V[1] != j) && (polys[k].V[2] != j) ) continue;
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UE1Vector vert[3], dir[2], norm;
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// compute facet normal
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for ( int l=0; l<3; l++ )
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vert[l] = verts[polys[k].V[l]+numVerts*i].Pos;
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dir[0].X = vert[1].X-vert[0].X;
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dir[0].Y = vert[1].Y-vert[0].Y;
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dir[0].Z = vert[1].Z-vert[0].Z;
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dir[1].X = vert[2].X-vert[0].X;
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dir[1].Y = vert[2].Y-vert[0].Y;
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dir[1].Z = vert[2].Z-vert[0].Z;
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norm.X = dir[0].Y*dir[1].Z-dir[0].Z*dir[1].Y;
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norm.Y = dir[0].Z*dir[1].X-dir[0].X*dir[1].Z;
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norm.Z = dir[0].X*dir[1].Y-dir[0].Y*dir[1].X;
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double s = sqrt(norm.X*norm.X+norm.Y*norm.Y+norm.Z*norm.Z);
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if ( s != 0. )
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{
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norm.X /= s;
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norm.Y /= s;
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norm.Z /= s;
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}
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nsum.X += norm.X;
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nsum.Y += norm.Y;
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nsum.Z += norm.Z;
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total+=1.;
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}
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verts[j+numVerts*i].Normal.X = nsum.X/total;
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verts[j+numVerts*i].Normal.Y = nsum.Y/total;
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verts[j+numVerts*i].Normal.Z = nsum.Z/total;
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}
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}
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// populate skin groups
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for ( int i=0; i<numGroups; i++ )
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{
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UE1Group Group;
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Group.numPolys = 0;
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for ( int j=0; j<numPolys; j++ )
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{
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if ( polys[j].texNum != groupIndices[i] )
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continue;
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Group.P.Push(j);
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Group.numPolys++;
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}
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groups.Push(Group);
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}
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// ... and it's finally done
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}
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void FUE1Model::UnloadGeometry()
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{
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verts.Reset();
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polys.Reset();
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for ( int i=0; i<numGroups; i++ )
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groups[i].P.Reset();
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groups.Reset();
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}
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int FUE1Model::FindFrame( const char *name )
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{
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// unsupported, there are no named frames
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return -1;
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}
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void FUE1Model::RenderFrame( FModelRenderer *renderer, FTexture *skin, int frame, int frame2, double inter, int translation )
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{
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// the moment of magic
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if ( (frame >= numFrames) || (frame2 >= numFrames) ) return;
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renderer->SetInterpolation(inter);
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int vsize, fsize = 0, vofs = 0;
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for ( int i=0; i<numGroups; i++ ) fsize += groups[i].numPolys*3;
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for ( int i=0; i<numGroups; i++ )
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{
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vsize = groups[i].numPolys*3;
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FTexture *sskin = skin;
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if ( !sskin )
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{
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if ( curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i].isValid() )
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sskin = TexMan(curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i]);
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if ( !sskin )
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{
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vofs += vsize;
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continue;
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}
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}
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renderer->SetMaterial(sskin,false,translation);
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mVBuf->SetupFrame(renderer,vofs+frame*fsize,vofs+frame2*fsize,vsize);
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renderer->DrawArrays(0,vsize);
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vofs += vsize;
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}
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renderer->SetInterpolation(0.f);
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}
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void FUE1Model::BuildVertexBuffer( FModelRenderer *renderer )
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{
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if ( mVBuf != NULL )
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return;
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int vsize = 0;
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for ( int i=0; i<numGroups; i++ )
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vsize += groups[i].numPolys*3;
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vsize *= numFrames;
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mVBuf = renderer->CreateVertexBuffer(false,numFrames==1);
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FModelVertex *vptr = mVBuf->LockVertexBuffer(vsize);
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int vidx = 0;
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for ( int i=0; i<numFrames; i++ )
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{
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for ( int j=0; j<numGroups; j++ )
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{
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for ( int k=0; k<groups[j].numPolys; k++ )
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{
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for ( int l=0; l<3; l++ )
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{
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UE1Vertex V = verts[polys[groups[j].P[k]].V[l]+i*numVerts];
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UE1Coord C = polys[groups[j].P[k]].C[l];
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FModelVertex *vert = &vptr[vidx++];
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vert->Set(V.Pos.X,V.Pos.Y,V.Pos.Z,C.S,C.T);
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vert->SetNormal(V.Normal.X,V.Normal.Y,V.Normal.Z);
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}
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}
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}
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}
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mVBuf->UnlockVertexBuffer();
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}
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void FUE1Model::AddSkins( uint8_t *hitlist )
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{
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for ( int i=0; i<numGroups; i++ )
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if ( curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i].isValid() )
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hitlist[curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i].GetIndex()] |= FTextureManager::HIT_Flat;
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}
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FUE1Model::~FUE1Model()
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{
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UnloadGeometry();
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}
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