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split Wavefront .obj to graphics conversion in a reusable file (Wavefront2GLInstanceGraphicsShape.*)

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2014-09-16 14:22:09 -07:00
parent 07e2dcc749
commit f395a5d031
5 changed files with 123 additions and 97 deletions
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1
Demos3/AllBullet2Demos/CMakeLists.txt
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@@ -42,6 +42,7 @@ SET(App_AllBullet2Demos_SRCS
../ImportURDFDemo/ImportURDFSetup.cpp ../ImportURDFDemo/ImportURDFSetup.cpp
../ImportURDFDemo/ImportURDFSetup.h ../ImportURDFDemo/ImportURDFSetup.h
../ImportObjDemo/ImportObjSetup.cpp ../ImportObjDemo/ImportObjSetup.cpp
../ImportObjDemo/Wavefront2GLInstanceGraphicsShape.cpp
../ImportSTLDemo/ImportSTLSetup.cpp ../ImportSTLDemo/ImportSTLSetup.cpp
../Wavefront/tiny_obj_loader.cpp ../Wavefront/tiny_obj_loader.cpp
../Wavefront/tiny_obj_loader.h ../Wavefront/tiny_obj_loader.h

1
Demos3/AllBullet2Demos/premake4.lua
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@@ -60,6 +60,7 @@
"../bullet2/ConstraintDemo/ConstraintPhysicsSetup.h", "../bullet2/ConstraintDemo/ConstraintPhysicsSetup.h",
"../ImportURDFDemo/ImportURDFSetup.cpp", "../ImportURDFDemo/ImportURDFSetup.cpp",
"../ImportObjDemo/ImportObjSetup.cpp", "../ImportObjDemo/ImportObjSetup.cpp",
"../ImportObjDemo/Wavefront2GLInstanceGraphicsShape.cpp",
"../ImportSTLDemo/ImportSTLSetup.cpp", "../ImportSTLDemo/ImportSTLSetup.cpp",
"../Wavefront/tiny_obj_loader.cpp", "../Wavefront/tiny_obj_loader.cpp",
"../Wavefront/tiny_obj_loader.h", "../Wavefront/tiny_obj_loader.h",

100
Demos3/ImportObjDemo/ImportObjSetup.cpp
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@@ -5,6 +5,7 @@
#include "OpenGLWindow/GLInstanceGraphicsShape.h" #include "OpenGLWindow/GLInstanceGraphicsShape.h"
#include "btBulletDynamicsCommon.h" #include "btBulletDynamicsCommon.h"
#include "OpenGLWindow/SimpleOpenGL3App.h" #include "OpenGLWindow/SimpleOpenGL3App.h"
#include "Wavefront2GLInstanceGraphicsShape.h"
ImportObjDemo::ImportObjDemo(SimpleOpenGL3App* app) ImportObjDemo::ImportObjDemo(SimpleOpenGL3App* app)
:m_app(app) :m_app(app)
@@ -19,101 +20,6 @@ ImportObjDemo::~ImportObjDemo()
static GLInstanceGraphicsShape* gCreateGraphicsShapeFromWavefrontObj(std::vector<tinyobj::shape_t>& shapes)
{
b3AlignedObjectArray<GLInstanceVertex>* vertices = new b3AlignedObjectArray<GLInstanceVertex>;
{
// int numVertices = obj->vertexCount;
// int numIndices = 0;
b3AlignedObjectArray<int>* indicesPtr = new b3AlignedObjectArray<int>;
for (int s=0;s<(int)shapes.size();s++)
{
tinyobj::shape_t& shape = shapes[s];
int faceCount = shape.mesh.indices.size();
for (int f=0;f<faceCount;f+=3)
{
//btVector3 normal(face.m_plane[0],face.m_plane[1],face.m_plane[2]);
if (1)
{
btVector3 normal(0,1,0);
int vtxBaseIndex = vertices->size();
GLInstanceVertex vtx0;
vtx0.xyzw[0] = shape.mesh.positions[shape.mesh.indices[f]*3+0];
vtx0.xyzw[1] = shape.mesh.positions[shape.mesh.indices[f]*3+1];
vtx0.xyzw[2] = shape.mesh.positions[shape.mesh.indices[f]*3+2];
vtx0.xyzw[3] = 0.f;
vtx0.uv[0] = 0.5f;//shape.mesh.positions[shape.mesh.indices[f]*3+2];?
vtx0.uv[1] = 0.5f;
GLInstanceVertex vtx1;
vtx1.xyzw[0] = shape.mesh.positions[shape.mesh.indices[f+1]*3+0];
vtx1.xyzw[1] = shape.mesh.positions[shape.mesh.indices[f+1]*3+1];
vtx1.xyzw[2] = shape.mesh.positions[shape.mesh.indices[f+1]*3+2];
vtx1.xyzw[3]= 0.f;
vtx1.uv[0] = 0.5f;//obj->textureList[face->vertex_index[1]]->e[0];
vtx1.uv[1] = 0.5f;//obj->textureList[face->vertex_index[1]]->e[1];
GLInstanceVertex vtx2;
vtx2.xyzw[0] = shape.mesh.positions[shape.mesh.indices[f+2]*3+0];
vtx2.xyzw[1] = shape.mesh.positions[shape.mesh.indices[f+2]*3+1];
vtx2.xyzw[2] = shape.mesh.positions[shape.mesh.indices[f+2]*3+2];
vtx2.xyzw[3] = 0.f;
vtx2.uv[0] = 0.5f;
vtx2.uv[1] = 0.5f;
btVector3 v0(vtx0.xyzw[0],vtx0.xyzw[1],vtx0.xyzw[2]);
btVector3 v1(vtx1.xyzw[0],vtx1.xyzw[1],vtx1.xyzw[2]);
btVector3 v2(vtx2.xyzw[0],vtx2.xyzw[1],vtx2.xyzw[2]);
normal = (v1-v0).cross(v2-v0);
btScalar len2 = normal.length2();
//skip degenerate triangles
if (len2 > SIMD_EPSILON)
{
normal.normalize();
vtx0.normal[0] = normal[0];
vtx0.normal[1] = normal[1];
vtx0.normal[2] = normal[2];
vtx1.normal[0] = normal[0];
vtx1.normal[1] = normal[1];
vtx1.normal[2] = normal[2];
vtx2.normal[0] = normal[0];
vtx2.normal[1] = normal[1];
vtx2.normal[2] = normal[2];
vertices->push_back(vtx0);
vertices->push_back(vtx1);
vertices->push_back(vtx2);
indicesPtr->push_back(vtxBaseIndex);
indicesPtr->push_back(vtxBaseIndex+1);
indicesPtr->push_back(vtxBaseIndex+2);
}
}
}
}
GLInstanceGraphicsShape* gfxShape = new GLInstanceGraphicsShape;
gfxShape->m_vertices = vertices;
gfxShape->m_numvertices = vertices->size();
gfxShape->m_indices = indicesPtr;
gfxShape->m_numIndices = indicesPtr->size();
for (int i=0;i<4;i++)
gfxShape->m_scaling[i] = 1;//bake the scaling into the vertices
return gfxShape;
}
}
@@ -150,7 +56,7 @@ void ImportObjDemo::initPhysics(GraphicsPhysicsBridge& gfxBridge)
return; return;
btVector3 shift(0,0,0); btVector3 shift(0,0,0);
btVector3 scaling(1,1,1); btVector3 scaling(10,10,10);
// int index=10; // int index=10;
{ {
@@ -158,7 +64,7 @@ void ImportObjDemo::initPhysics(GraphicsPhysicsBridge& gfxBridge)
std::vector<tinyobj::shape_t> shapes; std::vector<tinyobj::shape_t> shapes;
std::string err = tinyobj::LoadObj(shapes, relativeFileName, prefix[prefixIndex]); std::string err = tinyobj::LoadObj(shapes, relativeFileName, prefix[prefixIndex]);
GLInstanceGraphicsShape* gfxShape = gCreateGraphicsShapeFromWavefrontObj(shapes); GLInstanceGraphicsShape* gfxShape = btgCreateGraphicsShapeFromWavefrontObj(shapes);
btTransform trans; btTransform trans;
trans.setIdentity(); trans.setIdentity();

109
Demos3/ImportObjDemo/Wavefront2GLInstanceGraphicsShape.cpp Normal file
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@@ -0,0 +1,109 @@
#include "Wavefront2GLInstanceGraphicsShape.h"
#include "OpenGLWindow/GLInstancingRenderer.h"
#include "OpenGLWindow/GLInstanceGraphicsShape.h"
#include "btBulletDynamicsCommon.h"
#include "OpenGLWindow/SimpleOpenGL3App.h"
#include "Wavefront2GLInstanceGraphicsShape.h"
#include "OpenGLWindow/GLInstancingRenderer.h"
#include "OpenGLWindow/GLInstanceGraphicsShape.h"
GLInstanceGraphicsShape* btgCreateGraphicsShapeFromWavefrontObj(std::vector<tinyobj::shape_t>& shapes)
{
b3AlignedObjectArray<GLInstanceVertex>* vertices = new b3AlignedObjectArray<GLInstanceVertex>;
{
// int numVertices = obj->vertexCount;
// int numIndices = 0;
b3AlignedObjectArray<int>* indicesPtr = new b3AlignedObjectArray<int>;
for (int s=0;s<(int)shapes.size();s++)
{
tinyobj::shape_t& shape = shapes[s];
int faceCount = shape.mesh.indices.size();
for (int f=0;f<faceCount;f+=3)
{
//btVector3 normal(face.m_plane[0],face.m_plane[1],face.m_plane[2]);
if (1)
{
btVector3 normal(0,1,0);
int vtxBaseIndex = vertices->size();
GLInstanceVertex vtx0;
vtx0.xyzw[0] = shape.mesh.positions[shape.mesh.indices[f]*3+0];
vtx0.xyzw[1] = shape.mesh.positions[shape.mesh.indices[f]*3+1];
vtx0.xyzw[2] = shape.mesh.positions[shape.mesh.indices[f]*3+2];
vtx0.xyzw[3] = 0.f;
vtx0.uv[0] = 0.5f;//shape.mesh.positions[shape.mesh.indices[f]*3+2];?
vtx0.uv[1] = 0.5f;
GLInstanceVertex vtx1;
vtx1.xyzw[0] = shape.mesh.positions[shape.mesh.indices[f+1]*3+0];
vtx1.xyzw[1] = shape.mesh.positions[shape.mesh.indices[f+1]*3+1];
vtx1.xyzw[2] = shape.mesh.positions[shape.mesh.indices[f+1]*3+2];
vtx1.xyzw[3]= 0.f;
vtx1.uv[0] = 0.5f;//obj->textureList[face->vertex_index[1]]->e[0];
vtx1.uv[1] = 0.5f;//obj->textureList[face->vertex_index[1]]->e[1];
GLInstanceVertex vtx2;
vtx2.xyzw[0] = shape.mesh.positions[shape.mesh.indices[f+2]*3+0];
vtx2.xyzw[1] = shape.mesh.positions[shape.mesh.indices[f+2]*3+1];
vtx2.xyzw[2] = shape.mesh.positions[shape.mesh.indices[f+2]*3+2];
vtx2.xyzw[3] = 0.f;
vtx2.uv[0] = 0.5f;
vtx2.uv[1] = 0.5f;
btVector3 v0(vtx0.xyzw[0],vtx0.xyzw[1],vtx0.xyzw[2]);
btVector3 v1(vtx1.xyzw[0],vtx1.xyzw[1],vtx1.xyzw[2]);
btVector3 v2(vtx2.xyzw[0],vtx2.xyzw[1],vtx2.xyzw[2]);
normal = (v1-v0).cross(v2-v0);
btScalar len2 = normal.length2();
//skip degenerate triangles
if (len2 > SIMD_EPSILON)
{
normal.normalize();
} else
{
normal.setValue(0,0,0);
}
vtx0.normal[0] = normal[0];
vtx0.normal[1] = normal[1];
vtx0.normal[2] = normal[2];
vtx1.normal[0] = normal[0];
vtx1.normal[1] = normal[1];
vtx1.normal[2] = normal[2];
vtx2.normal[0] = normal[0];
vtx2.normal[1] = normal[1];
vtx2.normal[2] = normal[2];
vertices->push_back(vtx0);
vertices->push_back(vtx1);
vertices->push_back(vtx2);
indicesPtr->push_back(vtxBaseIndex);
indicesPtr->push_back(vtxBaseIndex+1);
indicesPtr->push_back(vtxBaseIndex+2);
}
}
}
GLInstanceGraphicsShape* gfxShape = new GLInstanceGraphicsShape;
gfxShape->m_vertices = vertices;
gfxShape->m_numvertices = vertices->size();
gfxShape->m_indices = indicesPtr;
gfxShape->m_numIndices = indicesPtr->size();
for (int i=0;i<4;i++)
gfxShape->m_scaling[i] = 1;//bake the scaling into the vertices
return gfxShape;
}
}

9
Demos3/ImportObjDemo/Wavefront2GLInstanceGraphicsShape.h Normal file
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@@ -0,0 +1,9 @@
#ifndef WAVEFRONT2GRAPHICS_H
#define WAVEFRONT2GRAPHICS_H
#include"../Wavefront/tiny_obj_loader.h"
#include <vector>
struct GLInstanceGraphicsShape* btgCreateGraphicsShapeFromWavefrontObj(std::vector<tinyobj::shape_t>& shapes);
#endif //WAVEFRONT2GRAPHICS_H