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https://github.com/minetest/irrlicht.git
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ce1cdd2543
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6527 dfc29bdd-3216-0410-991c-e03cc46cb475
555 lines
16 KiB
C++
555 lines
16 KiB
C++
// Copyright (C) 2014 Lauri Kasanen
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#include "IrrCompileConfig.h"
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#ifdef _IRR_COMPILE_WITH_B3D_WRITER_
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#include "CB3DMeshWriter.h"
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#include "SB3DStructs.h"
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#include "os.h"
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#include "ISkinnedMesh.h"
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#include "IMeshBuffer.h"
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#include "IWriteFile.h"
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#include "ITexture.h"
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#include "irrMap.h"
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namespace irr
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{
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namespace scene
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{
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using namespace core;
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using namespace video;
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CB3DMeshWriter::CB3DMeshWriter()
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{
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#ifdef _DEBUG
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setDebugName("CB3DMeshWriter");
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#endif
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}
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//! Returns the type of the mesh writer
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EMESH_WRITER_TYPE CB3DMeshWriter::getType() const
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{
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return EMWT_B3D;
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}
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//! writes a mesh
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bool CB3DMeshWriter::writeMesh(io::IWriteFile* file, IMesh* const mesh, s32 flags)
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{
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if (!file || !mesh)
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return false;
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#ifdef __BIG_ENDIAN__
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os::Printer::log("B3D export does not support big-endian systems.", ELL_ERROR);
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return false;
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#endif
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file->write("BB3D", 4);
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file->write("size", 4); // BB3D chunk size, updated later
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const u32 version = 1;
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file->write(&version, 4);
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//
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const u32 numMeshBuffers = mesh->getMeshBufferCount();
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array<SB3dTexture> texs;
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map<ITexture *, u32> tex2id; // TODO: texture pointer as key not sufficient as same texture can have several id's
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u32 texsizes = 0;
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for (u32 i = 0; i < numMeshBuffers; i++)
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{
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const IMeshBuffer * const mb = mesh->getMeshBuffer(i);
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const SMaterial &mat = mb->getMaterial();
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for (u32 j = 0; j < MATERIAL_MAX_TEXTURES; j++)
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{
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if (mat.getTexture(j))
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{
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SB3dTexture t;
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t.TextureName = core::stringc(mat.getTexture(j)->getName().getPath());
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// TODO: need some description of Blitz3D texture-flags to figure this out. But Blend should likely depend on material-type.
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t.Flags = j == 2 ? 65536 : 1;
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t.Blend = 2;
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// TODO: evaluate texture matrix
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t.Xpos = 0;
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t.Ypos = 0;
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t.Xscale = 1;
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t.Yscale = 1;
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t.Angle = 0;
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texs.push_back(t);
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texsizes += 7*4 + t.TextureName.size() + 1;
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tex2id[mat.getTexture(j)] = texs.size() - 1;
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}
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}
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}
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file->write("TEXS", 4);
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file->write(&texsizes, 4);
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u32 numTexture = texs.size();
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for (u32 i = 0; i < numTexture; i++)
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{
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file->write(texs[i].TextureName.c_str(), (size_t)texs[i].TextureName.size() + 1);
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file->write(&texs[i].Flags, 7*4);
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}
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//
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file->write("BRUS", 4);
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const u32 brushSizeAdress = file->getPos();
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file->write(&brushSizeAdress, 4); // BRUSH chunk size, updated later
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const u32 usedtex = MATERIAL_MAX_TEXTURES;
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file->write(&usedtex, 4);
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for (u32 i = 0; i < numMeshBuffers; i++)
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{
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const IMeshBuffer * const mb = mesh->getMeshBuffer(i);
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const SMaterial &mat = mb->getMaterial();
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file->write("", 1);
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float f = 1;
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file->write(&f, 4);
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file->write(&f, 4);
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file->write(&f, 4);
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file->write(&f, 4);
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f = 0;
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file->write(&f, 4);
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u32 tmp = 1;
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file->write(&tmp, 4);
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tmp = 0;
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file->write(&tmp, 4);
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for (u32 j = 0; j < MATERIAL_MAX_TEXTURES; j++)
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{
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s32 id = -1;
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if (mat.getTexture(j))
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{
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id = tex2id[mat.getTexture(j)];
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}
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file->write(&id, 4);
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}
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}
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writeSizeFrom(file, brushSizeAdress+4, brushSizeAdress); // BRUSH chunk size
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file->write("NODE", 4);
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u32 nodeSizeAdress = file->getPos();
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file->write(&nodeSizeAdress, 4); // NODE chunk size, updated later
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// Node
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file->write("", 1);
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// position
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writeVector3(file, core::vector3df(0.f, 0.f, 0.f));
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// scale
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writeVector3(file, core::vector3df(1.f, 1.f, 1.f));
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// rotation
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writeQuaternion(file, core::quaternion(0.f, 0.f, 0.f, 1.f));
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// Mesh
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file->write("MESH", 4);
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const u32 meshSizeAdress = file->getPos();
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file->write(&meshSizeAdress, 4); // MESH chunk size, updated later
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s32 brushID = -1;
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file->write(&brushID, 4);
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// Verts
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file->write("VRTS", 4);
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const u32 verticesSizeAdress = file->getPos();
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file->write(&verticesSizeAdress, 4);
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u32 flagsB3D = 3; // 1=normal values present, 2=rgba values present
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file->write(&flagsB3D, 4);
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const u32 texcoordsCount = getUVlayerCount(mesh);
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file->write(&texcoordsCount, 4);
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flagsB3D = 2;
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file->write(&flagsB3D, 4);
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for (u32 i = 0; i < numMeshBuffers; i++)
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{
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const IMeshBuffer * const mb = mesh->getMeshBuffer(i);
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const u32 numVertices = mb->getVertexCount();
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for (u32 j = 0; j < numVertices; j++)
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{
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const vector3df &pos = mb->getPosition(j);
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writeVector3(file, pos);
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const vector3df &n = mb->getNormal(j);
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writeVector3(file, n);
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switch (mb->getVertexType())
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{
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case EVT_STANDARD:
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{
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S3DVertex *v = (S3DVertex *) mb->getVertices();
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const SColorf col(v[j].Color);
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writeColor(file, col);
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const core::vector2df uv1 = v[j].TCoords;
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writeVector2(file, uv1);
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if (texcoordsCount == 2)
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{
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writeVector2(file, core::vector2df(0.f, 0.f));
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}
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}
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break;
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case EVT_2TCOORDS:
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{
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S3DVertex2TCoords *v = (S3DVertex2TCoords *) mb->getVertices();
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const SColorf col(v[j].Color);
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writeColor(file, col);
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const core::vector2df uv1 = v[j].TCoords;
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writeVector2(file, uv1);
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const core::vector2df uv2 = v[j].TCoords;
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writeVector2(file, uv2);
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}
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break;
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case EVT_TANGENTS:
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{
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S3DVertexTangents *v = (S3DVertexTangents *) mb->getVertices();
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const SColorf col(v[j].Color);
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writeColor(file, col);
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const core::vector2df uv1 = v[j].TCoords;
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writeVector2(file, uv1);
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if (texcoordsCount == 2)
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{
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writeVector2(file, core::vector2df(0.f, 0.f));
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}
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}
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break;
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}
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}
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}
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writeSizeFrom(file, verticesSizeAdress+4, verticesSizeAdress); // VERT chunk size
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u32 currentMeshBufferIndex = 0;
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// Tris
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for (u32 i = 0; i < numMeshBuffers; i++)
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{
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const IMeshBuffer * const mb = mesh->getMeshBuffer(i);
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file->write("TRIS", 4);
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const u32 trisSizeAdress = file->getPos();
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file->write(&trisSizeAdress, 4); // TRIS chunk size, updated later
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file->write(&i, 4);
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u32 numIndices = mb->getIndexCount();
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if ( mb->getIndexType() == video::EIT_16BIT )
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{
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const u16 * const idx = mb->getIndices();
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for (u32 j = 0; j < numIndices; j += 3)
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{
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u32 tmp = idx[j] + currentMeshBufferIndex;
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file->write(&tmp, sizeof(u32));
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tmp = idx[j + 1] + currentMeshBufferIndex;
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file->write(&tmp, sizeof(u32));
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tmp = idx[j + 2] + currentMeshBufferIndex;
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file->write(&tmp, sizeof(u32));
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}
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}
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else if ( mb->getIndexType() == video::EIT_32BIT )
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{
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const u32 * const idx = (const u32*) mb->getIndices();
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for (u32 j = 0; j < numIndices; j += 3)
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{
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u32 tmp = idx[j] + currentMeshBufferIndex;
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file->write(&tmp, sizeof(u32));
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tmp = idx[j + 1] + currentMeshBufferIndex;
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file->write(&tmp, sizeof(u32));
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tmp = idx[j + 2] + currentMeshBufferIndex;
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file->write(&tmp, sizeof(u32));
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}
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}
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writeSizeFrom(file, trisSizeAdress+4, trisSizeAdress); // TRIS chunk size
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currentMeshBufferIndex += mb->getVertexCount();
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}
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writeSizeFrom(file, meshSizeAdress+4, meshSizeAdress); // MESH chunk size
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if(ISkinnedMesh *skinnedMesh = getSkinned(mesh))
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{
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// Write animation data
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f32 animationSpeedMultiplier = 1.f;
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if (!skinnedMesh->isStatic())
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{
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file->write("ANIM", 4);
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const u32 animsize = 12;
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file->write(&animsize, 4);
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const u32 flags = 0;
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f32 fps = skinnedMesh->getAnimationSpeed();
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/* B3D file format use integer as keyframe, so there is some potential issues if the model use float as keyframe (Irrlicht use float) with a low animation FPS value
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So we define a minimum animation FPS value to multiply the frame and FPS value if the FPS of the animation is too low to store the keyframe with integers */
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const int minimumAnimationFPS = 60;
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if (fps < minimumAnimationFPS)
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{
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animationSpeedMultiplier = minimumAnimationFPS / fps;
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fps = minimumAnimationFPS;
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}
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const u32 frames = static_cast<u32>(skinnedMesh->getFrameCount() * animationSpeedMultiplier);
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file->write(&flags, 4);
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file->write(&frames, 4);
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file->write(&fps, 4);
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}
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// Write joints
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core::array<ISkinnedMesh::SJoint*> rootJoints = getRootJoints(skinnedMesh);
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for (u32 i = 0; i < rootJoints.size(); i++)
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{
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writeJointChunk(file, skinnedMesh, rootJoints[i], animationSpeedMultiplier);
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}
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}
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writeSizeFrom(file, nodeSizeAdress+4, nodeSizeAdress); // Node chunk size
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writeSizeFrom(file, 8, 4); // BB3D chunk size
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return true;
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}
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void CB3DMeshWriter::writeJointChunk(io::IWriteFile* file, ISkinnedMesh* mesh, ISkinnedMesh::SJoint* joint, f32 animationSpeedMultiplier)
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{
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// Node
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file->write("NODE", 4);
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const u32 nodeSizeAdress = file->getPos();
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file->write(&nodeSizeAdress, 4);
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core::stringc name = joint->Name;
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file->write(name.c_str(), name.size());
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file->write("", 1);
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// Position
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const core::vector3df pos = joint->Animatedposition;
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writeVector3(file, pos);
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// Scale
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core::vector3df scale = joint->Animatedscale;
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if (scale == core::vector3df(0, 0, 0))
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scale = core::vector3df(1, 1, 1);
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writeVector3(file, scale);
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// Rotation
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const core::quaternion quat = joint->Animatedrotation;
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writeQuaternion(file, quat);
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// Bone
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file->write("BONE", 4);
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u32 bonesize = 8 * joint->Weights.size();
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file->write(&bonesize, 4);
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// Skinning ------------------
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for (u32 i = 0; i < joint->Weights.size(); i++)
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{
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const u32 vertexID = joint->Weights[i].vertex_id;
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const u32 bufferID = joint->Weights[i].buffer_id;
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const f32 weight = joint->Weights[i].strength;
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u32 b3dVertexID = vertexID;
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for (u32 j = 0; j < bufferID; j++)
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{
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b3dVertexID += mesh->getMeshBuffer(j)->getVertexCount();
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}
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file->write(&b3dVertexID, 4);
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file->write(&weight, 4);
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}
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// ---------------------------
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f32 floatBuffer[5];
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// Animation keys
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if (joint->PositionKeys.size())
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{
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file->write("KEYS", 4);
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u32 keysSize = 4 * joint->PositionKeys.size() * 4; // X, Y and Z pos + frame
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keysSize += 4; // Flag to define the type of the key
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file->write(&keysSize, 4);
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u32 flag = 1; // 1 = flag for position keys
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file->write(&flag, 4);
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for (u32 i = 0; i < joint->PositionKeys.size(); i++)
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{
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const s32 frame = static_cast<s32>(joint->PositionKeys[i].frame * animationSpeedMultiplier);
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file->write(&frame, 4);
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const core::vector3df pos = joint->PositionKeys[i].position;
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pos.getAs3Values(floatBuffer);
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file->write(floatBuffer, 12);
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}
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}
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if (joint->RotationKeys.size())
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{
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file->write("KEYS", 4);
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u32 keysSize = 4 * joint->RotationKeys.size() * 5; // W, X, Y and Z rot + frame
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keysSize += 4; // Flag
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file->write(&keysSize, 4);
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u32 flag = 4;
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file->write(&flag, 4);
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for (u32 i = 0; i < joint->RotationKeys.size(); i++)
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{
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const s32 frame = static_cast<s32>(joint->RotationKeys[i].frame * animationSpeedMultiplier);
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const core::quaternion rot = joint->RotationKeys[i].rotation;
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memcpy(floatBuffer, &frame, 4);
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floatBuffer[1] = rot.W;
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floatBuffer[2] = rot.X;
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floatBuffer[3] = rot.Y;
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floatBuffer[4] = rot.Z;
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file->write(floatBuffer, 20);
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}
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}
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if (joint->ScaleKeys.size())
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{
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file->write("KEYS", 4);
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u32 keysSize = 4 * joint->ScaleKeys.size() * 4; // X, Y and Z scale + frame
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keysSize += 4; // Flag
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file->write(&keysSize, 4);
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u32 flag = 2;
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file->write(&flag, 4);
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for (u32 i = 0; i < joint->ScaleKeys.size(); i++)
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{
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const s32 frame = static_cast<s32>(joint->ScaleKeys[i].frame * animationSpeedMultiplier);
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file->write(&frame, 4);
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const core::vector3df scale = joint->ScaleKeys[i].scale;
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scale.getAs3Values(floatBuffer);
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file->write(floatBuffer, 12);
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}
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}
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for (u32 i = 0; i < joint->Children.size(); i++)
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{
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writeJointChunk(file, mesh, joint->Children[i], animationSpeedMultiplier);
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}
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writeSizeFrom(file, nodeSizeAdress+4, nodeSizeAdress); // NODE chunk size
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}
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ISkinnedMesh* CB3DMeshWriter::getSkinned (IMesh *mesh)
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{
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if (mesh->getMeshType() == EAMT_SKINNED)
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{
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return static_cast<ISkinnedMesh*>(mesh);
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}
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return 0;
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}
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core::array<ISkinnedMesh::SJoint*> CB3DMeshWriter::getRootJoints(const ISkinnedMesh* mesh)
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{
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core::array<ISkinnedMesh::SJoint*> roots;
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core::array<ISkinnedMesh::SJoint*> allJoints = mesh->getAllJoints();
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for (u32 i = 0; i < allJoints.size(); i++)
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{
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bool isRoot = true;
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ISkinnedMesh::SJoint* testedJoint = allJoints[i];
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for (u32 j = 0; j < allJoints.size(); j++)
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{
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ISkinnedMesh::SJoint* testedJoint2 = allJoints[j];
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for (u32 k = 0; k < testedJoint2->Children.size(); k++)
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{
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if (testedJoint == testedJoint2->Children[k])
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isRoot = false;
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}
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}
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if (isRoot)
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roots.push_back(testedJoint);
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}
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return roots;
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}
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u32 CB3DMeshWriter::getUVlayerCount(const IMesh* mesh)
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{
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const u32 numBeshBuffers = mesh->getMeshBufferCount();
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for (u32 i = 0; i < numBeshBuffers; i++)
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{
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const IMeshBuffer * const mb = mesh->getMeshBuffer(i);
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if (mb->getVertexType() == EVT_2TCOORDS)
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{
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return 2;
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}
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}
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return 1;
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}
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void CB3DMeshWriter::writeVector2(io::IWriteFile* file, const core::vector2df& vec2)
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{
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f32 buffer[2] = {vec2.X, vec2.Y};
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file->write(buffer, 8);
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}
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void CB3DMeshWriter::writeVector3(io::IWriteFile* file, const core::vector3df& vec3)
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{
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f32 buffer[3];
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vec3.getAs3Values(buffer);
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file->write(buffer, 12);
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}
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void CB3DMeshWriter::writeQuaternion(io::IWriteFile* file, const core::quaternion& quat)
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|
{
|
|
f32 buffer[4] = {quat.W, quat.X, quat.Y, quat.Z};
|
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file->write(buffer, 16);
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|
}
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void CB3DMeshWriter::writeColor(io::IWriteFile* file, const video::SColorf& color)
|
|
{
|
|
f32 buffer[4] = {color.r, color.g, color.b, color.a};
|
|
file->write(buffer, 16);
|
|
}
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|
// Write the size from a given position to current position at a specific position in the file
|
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void CB3DMeshWriter::writeSizeFrom(io::IWriteFile* file, const u32 from, const u32 adressToWrite)
|
|
{
|
|
const long back = file->getPos();
|
|
file->seek(adressToWrite);
|
|
const u32 sizeToWrite = back - from;
|
|
file->write(&sizeToWrite, 4);
|
|
file->seek(back);
|
|
}
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|
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} // end namespace
|
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} // end namespace
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#endif // _IRR_COMPILE_WITH_B3D_WRITER_
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