mirror of
https://github.com/DrBeef/Raze.git
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313 lines
8.9 KiB
C++
313 lines
8.9 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 "filesystem.h"
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#include "cmdlib.h"
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#include "model_ue1.h"
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#include "texturemanager.h"
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#include "modelrenderer.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 0:
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return ((int16_t)((n&0x7ff)<<5))/128.f;
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case 1:
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return ((int16_t)(((n>>11)&0x7ff)<<5))/128.f;
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case 2:
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return ((int16_t)(((n>>22)&0x3ff)<<6))/128.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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int lumpnum2;
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FString realfilename = fileSystem.GetFileFullName(lumpnum);
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if ( (size_t)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 = fileSystem.CheckNumForFullName(realfilename);
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mDataLump = lumpnum;
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mAnivLump = lumpnum2;
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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 = fileSystem.CheckNumForFullName(realfilename);
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mAnivLump = lumpnum;
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mDataLump = lumpnum2;
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}
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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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FileData lump, lump2;
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const char *buffer, *buffer2;
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lump = fileSystem.ReadFile(mDataLump);
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buffer = (char*)lump.GetMem();
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lump2 = fileSystem.ReadFile(mAnivLump);
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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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// detect deus ex format
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if ( (ahead->framesize/dhead->numverts) == 8 )
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{
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averts = NULL;
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dxverts = (dxvert*)(buffer2+sizeof(a3dhead));
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}
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else
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{
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averts = (uint32_t*)(buffer2+sizeof(a3dhead));
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dxverts = NULL;
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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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// 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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if ( dxverts != NULL )
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{
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// convert padded XYZ16
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Vert.Pos = FVector3(dxverts[j+i*numVerts].x,
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dxverts[j+i*numVerts].z,
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(float)-dxverts[j+i*numVerts].y);
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}
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else
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{
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// convert packed XY11Z10
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Vert.Pos = FVector3(unpackuvert(averts[j+i*numVerts],0),
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unpackuvert(averts[j+i*numVerts],2),
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-unpackuvert(averts[j+i*numVerts],1));
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}
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// refs will be set later
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Vert.P.Reset();
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Vert.nP = 0;
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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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Poly.C[j] = FVector2(dpolys[i].uv[j][0]/255.f,dpolys[i].uv[j][1]/255.f);
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// compute facet normals
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for ( int j=0; j<numFrames; j++ )
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{
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FVector3 dir[2];
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dir[0] = verts[Poly.V[1]+numVerts*j].Pos-verts[Poly.V[0]+numVerts*j].Pos;
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dir[1] = verts[Poly.V[2]+numVerts*j].Pos-verts[Poly.V[0]+numVerts*j].Pos;
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Poly.Normals.Push((dir[0]^dir[1]).Unit());
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// since we're iterating frames, also set references for later
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for ( int k=0; k<3; k++ )
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{
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verts[Poly.V[k]+numVerts*j].P.Push(i);
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verts[Poly.V[k]+numVerts*j].nP++;
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}
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}
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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 (average of all referenced poly normals)
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// since we have references listed from before, this saves a lot of time
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// without having to loop through the entire model each vertex (especially true for very complex models)
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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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FVector3 nsum = FVector3(0,0,0);
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for ( int k=0; k<verts[j+numVerts*i].nP; k++ )
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nsum += polys[verts[j+numVerts*i].P[k]].Normals[i];
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verts[j+numVerts*i].Normal = nsum.Unit();
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}
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}
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// populate poly groups (subdivided by texture number and type)
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// this method minimizes searches in the group list as much as possible
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// while still doing a single pass through the poly list
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int curgroup = -1;
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UE1Group Group;
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for ( int i=0; i<numPolys; i++ )
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{
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// while we're at it, look for attachment triangles
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// technically only one should exist, but we ain't following the specs 100% here
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if ( dpolys[i].type&PT_WeaponTriangle ) specialPolys.Push(i);
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if ( curgroup == -1 )
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{
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// no group, create it
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Group.P.Reset();
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Group.numPolys = 0;
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Group.texNum = dpolys[i].texnum;
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Group.type = dpolys[i].type;
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groups.Push(Group);
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curgroup = numGroups++;
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}
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else if ( (dpolys[i].texnum != groups[curgroup].texNum) || (dpolys[i].type != groups[curgroup].type) )
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{
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// different attributes than last time
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// search for existing group with new attributes, create one if not found
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curgroup = -1;
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for ( int j=0; j<numGroups; j++ )
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{
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if ( (groups[j].texNum != dpolys[i].texnum) || (groups[j].type != dpolys[i].type) ) continue;
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curgroup = j;
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break;
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}
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// counter the increment that will happen after continuing this loop
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// otherwise it'll be skipped over
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i--;
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continue;
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}
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groups[curgroup].P.Push(i);
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groups[curgroup].numPolys++;
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}
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// ... and it's finally done
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mDataLoaded = true;
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}
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void FUE1Model::UnloadGeometry()
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{
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mDataLoaded = false;
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specialPolys.Reset();
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numVerts = 0;
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numFrames = 0;
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numPolys = 0;
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numGroups = 0;
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verts.Reset();
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for ( int i=0; i<numPolys; i++ )
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polys[i].Normals.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, FGameTexture *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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if ( groups[i].type&PT_WeaponTriangle )
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{
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// weapon triangle should never be drawn, it only exists to calculate attachment position and orientation
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vofs += vsize;
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continue;
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}
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FGameTexture *sskin = skin;
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if ( !sskin )
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{
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if ( curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][groups[i].texNum].isValid() )
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sskin = TexMan.GetGameTexture(curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][groups[i].texNum], true);
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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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// TODO: Handle per-group render styles and other flags once functions for it are implemented
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// Future note: poly renderstyles should always be enforced unless the actor itself has a style other than Normal
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renderer->SetMaterial(sskin,false,translation);
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renderer->SetupFrame(this, 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 (GetVertexBuffer(renderer->GetType()))
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return;
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if ( !mDataLoaded )
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LoadGeometry();
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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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auto vbuf = renderer->CreateVertexBuffer(false,numFrames==1);
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SetVertexBuffer(renderer->GetType(), vbuf);
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FModelVertex *vptr = vbuf->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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FVector2 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.X,C.Y);
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if ( groups[j].type&PT_Curvy ) // use facet normal
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{
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vert->SetNormal(polys[groups[j].P[k]].Normals[i].X,
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polys[groups[j].P[k]].Normals[i].Y,
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polys[groups[j].P[k]].Normals[i].Z);
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}
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else 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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vbuf->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][groups[i].texNum].isValid() )
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hitlist[curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][groups[i].texNum].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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