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Robert Osfield
2003-01-10 17:06:20 +00:00
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That's all there is to it!

39
src/osgPlugins/directx/ReaderWriterDirectX.cpp
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@@ -6,18 +6,18 @@
* DirectX file converter for OpenSceneGraph.
* Copyright (c)2002 Ulrich Hertlein <u.hertlein@sandbox.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
@@ -60,7 +60,7 @@ public:
const osgDB::ReaderWriter::Options* options);
private:
osg::Geode* convertFromDX(DX::Object& obj, bool flipTexture);
osg::Geode* convertFromDX(DX::Object& obj, bool flipTexture, float creaseAngle);
};
// Register with Registry to instantiate the above reader/writer.
@@ -80,17 +80,21 @@ osgDB::ReaderWriter::ReadResult ReaderWriterDirectX::readNode(const std::string&
// Load DirectX mesh
DX::Object obj;
if (obj.load(fileName.c_str())) {
// Options?
bool flipTexture = true;
float creaseAngle = 80.0f;
if (options) {
const std::string option = options->getOptionString();
cerr << option << endl;
if (option.find("flipTexture") != string::npos)
flipTexture = false;
if (option.find("creaseAngle") != string::npos) {
// TODO
}
}
// Convert to osg::Geode
osg::Geode* geode = convertFromDX(obj, flipTexture);
osg::Geode* geode = convertFromDX(obj, flipTexture, creaseAngle);
if (!geode)
return ReadResult::FILE_NOT_HANDLED;
@@ -101,7 +105,8 @@ osgDB::ReaderWriter::ReadResult ReaderWriterDirectX::readNode(const std::string&
}
// Convert DirectX mesh to osg::Geode
osg::Geode* ReaderWriterDirectX::convertFromDX(DX::Object& obj, bool flipTexture)
osg::Geode* ReaderWriterDirectX::convertFromDX(DX::Object& obj,
bool flipTexture, float creaseAngle)
{
// Fetch mesh
const DX::Mesh* mesh = obj.getMesh();
@@ -114,7 +119,7 @@ osg::Geode* ReaderWriterDirectX::convertFromDX(DX::Object& obj, bool flipTexture
const DX::MeshNormals* meshNormals = obj.getMeshNormals();
if (!meshNormals) {
obj.generateNormals();
obj.generateNormals(creaseAngle);
meshNormals = obj.getMeshNormals();
}
if (!meshNormals)
@@ -285,11 +290,5 @@ osg::Geode* ReaderWriterDirectX::convertFromDX(DX::Object& obj, bool flipTexture
cullFace->setMode(osg::CullFace::BACK);
state->setAttributeAndModes(cullFace);
/*
* TODO:
* Smooth normals if we previously did a 'generateNormals'?
* (Would create a dependency on osgUtil.)
*/
return geode;
}

161
src/osgPlugins/directx/directx.cpp
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@@ -6,18 +6,18 @@
* Loader for DirectX .x files.
* Copyright (c)2002 Ulrich Hertlein <u.hertlein@sandbox.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
@@ -35,8 +35,8 @@ using namespace std;
// Tokenize a string
void tokenize(const string& str, vector<string>& tokens,
const string& delimiters = " \t\r\n;,")
static void tokenize(const string& str, vector<string>& tokens,
const string& delimiters = " \t\r\n;,")
{
string::size_type lastPos = str.find_first_not_of(delimiters, 0);
string::size_type pos = str.find_first_of(delimiters, lastPos);
@@ -50,21 +50,12 @@ void tokenize(const string& str, vector<string>& tokens,
// Constructor
Object::Object(const char* filename)
Object::Object()
{
_textureCoords = NULL;
_materialList = NULL;
_normals = NULL;
_mesh = NULL;
load(filename);
}
// Destructor
Object::~Object()
{
clear();
}
@@ -120,7 +111,7 @@ bool Object::load(const char* filename)
/*
* Generate per-face normals
*/
bool Object::generateNormals()
bool Object::generateNormals(float /*creaseAngle*/)
{
if (!_mesh)
return false;
@@ -131,22 +122,22 @@ bool Object::generateNormals()
_normals = NULL;
}
cerr << "*** GenerateNormals\n";
cout << "*** generateNormals\n";
// Create normals
_normals = new MeshNormals;
/*
* Calculate per-face normals from face vertices.
*/
vector<Vector> faceNormals;
faceNormals.resize(_mesh->faces.size());
// Loop over MeshFaces
unsigned int i, fi;
for (fi = 0; fi < _mesh->faces.size(); fi++) {
for (unsigned int fi = 0; fi < _mesh->faces.size(); fi++) {
// Collect polygon vertices
vector<Vector> poly;
unsigned int n = _mesh->faces[fi].size();
if (n < 3)
continue;
for (i = 0; i < n; i++) {
for (unsigned int i = 0; i < n; i++) {
unsigned int idx = _mesh->faces[fi][i];
poly.push_back(_mesh->vertices[idx]);
}
@@ -167,25 +158,55 @@ bool Object::generateNormals()
normal.x = e0.y * e1.z - e0.z * e1.y;
normal.y = e0.z * e1.x - e0.x * e1.z;
normal.z = e0.x * e1.y - e0.y * e1.x;
normal.normalize();
// Normalize
float len = sqrt(normal.x * normal.x + normal.y * normal.y + normal.z * normal.z);
normal.x /= len;
normal.y /= len;
normal.z /= len;
// Add normal index
unsigned int ni = _normals->normals.size();
_normals->normals.push_back(normal);
// All vertices of this face share this vertex
MeshFace mf;
mf.resize(n);
for (i = 0; i < n; i++)
mf[i] = ni;
_normals->faceNormals.push_back(mf);
// Add to per-face normals
faceNormals[fi] = normal;
}
/*
* Calculate per-vertex normals as average of all per-face normals that
* share this vertex. The index of the vertex normal is identical to the
* vertex index for now. This means each vertex only has a single normal...
*/
_normals = new MeshNormals;
_normals->normals.resize(_mesh->vertices.size());
for (unsigned int vi = 0; vi < _mesh->vertices.size(); vi++) {
Vector normal = { 0.0f, 0.0f, 0.0f };
unsigned int polyCount = 0;
// Collect normals of polygons that share this vertex
for (unsigned int fi = 0; fi < _mesh->faces.size(); fi++)
for (unsigned int i = 0; i < _mesh->faces[fi].size(); i++) {
unsigned int idx = _mesh->faces[fi][i];
if (idx == vi) {
normal.x += faceNormals[fi].x;
normal.y += faceNormals[fi].y;
normal.z += faceNormals[fi].z;
polyCount++;
}
}
//cerr << "vertex " << vi << " used by " << polyCount << " faces\n";
if (polyCount > 1) {
float polyCountRecip = 1.0f / (float) polyCount;
normal.x *= polyCountRecip;
normal.y *= polyCountRecip;
normal.z *= polyCountRecip;
normal.normalize();
}
// Add vertex normal
_normals->normals[vi] = normal;
}
// Copy face mesh to normals mesh
_normals->faceNormals.resize(_mesh->faces.size());
for (unsigned int fi = 0; fi < _mesh->faces.size(); fi++)
_normals->faceNormals[fi] = _mesh->faces[fi];
return true;
}
@@ -202,7 +223,7 @@ void Object::readTexFilename(ifstream& fin, TextureFilename& texture)
char buf[256];
vector<string> token;
cerr << "*** TexFilename\n";
//cout << "*** TexFilename\n";
while (fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -236,7 +257,7 @@ void Object::parseMaterial(ifstream& fin, Material& material)
unsigned int i = 0;
//cerr << "*** Material\n";
//cout << "*** Material\n";
while (fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -250,9 +271,8 @@ void Object::parseMaterial(ifstream& fin, Material& material)
if (token[0] == "TextureFilename") {
TextureFilename tf;
readTexFilename(fin, tf);
material.texture.push_back(tf);
//cerr << "num tex=" << material.texture.size() << endl;
//cerr << "* num tex=" << material.texture.size() << endl;
}
else
switch (i) {
@@ -296,7 +316,7 @@ void Object::readCoords2d(ifstream& fin, vector<Coords2d>& v, unsigned int count
unsigned int i = 0;
cerr << "*** Coords2d\n";
//cout << "*** Coords2d\n";
while (i < count && fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -322,7 +342,7 @@ void Object::readMeshTexCoords(ifstream& fin)
unsigned int nTextureCoords = 0;
cerr << "*** MeshTextureCoords\n";
//cout << "*** MeshTextureCoords\n";
while (fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -342,8 +362,7 @@ void Object::readMeshTexCoords(ifstream& fin)
nTextureCoords = atoi(token[0].c_str());
readCoords2d(fin, *_textureCoords, nTextureCoords);
cerr << "nTextureCoords=" << nTextureCoords << "/" << _textureCoords->size() << endl;
cerr << "* nTextureCoords=" << _textureCoords->size() << endl;
assert(nTextureCoords == _textureCoords->size());
}
}
@@ -357,7 +376,7 @@ void Object::readIndexList(ifstream& fin, vector<unsigned int>& v, unsigned int
unsigned int i = 0;
cerr << "*** IndexList\n";
//cout << "*** IndexList\n";
while (i < count && fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -381,7 +400,7 @@ void Object::parseMeshMaterialList(ifstream& fin)
unsigned int nMaterials = 0, nFaceIndices = 0;
cerr << "*** MeshMaterialList\n";
//cout << "*** MeshMaterialList\n";
while (fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -398,7 +417,7 @@ void Object::parseMeshMaterialList(ifstream& fin)
parseMaterial(fin, mm);
_materialList->material.push_back(mm);
//cerr << "num mat=" << _materialList->material.size() << endl;
//cerr << "* num mat=" << _materialList->material.size() << endl;
}
else {
cerr << "!!! MeshMaterialList: Section " << token[0] << endl;
@@ -412,15 +431,14 @@ void Object::parseMeshMaterialList(ifstream& fin)
// Materials
nMaterials = atoi(token[0].c_str());
//cerr << "nMaterials=" << nMaterials << endl;
//cerr << "* nMaterials=" << nMaterials << endl;
}
else if (nFaceIndices == 0) {
// Face indices
nFaceIndices = atoi(token[0].c_str());
readIndexList(fin, _materialList->faceIndices, nFaceIndices);
cerr << "nFaceIndices=" << nFaceIndices << "/" << _materialList->faceIndices.size() << endl;
cerr << "* nFaceIndices=" << _materialList->faceIndices.size() << endl;
assert(nFaceIndices == _materialList->faceIndices.size());
}
}
@@ -437,7 +455,7 @@ void Object::readVector(ifstream& fin, vector<Vector>& v, unsigned int count)
unsigned int i = 0;
cerr << "*** Vector\n";
//cout << "*** Vector\n";
while (i < count && fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -464,7 +482,7 @@ void Object::readMeshFace(ifstream& fin, vector<MeshFace>& v, unsigned int count
unsigned int i = 0;
cerr << "*** MeshFace\n";
//cout << "*** MeshFace\n";
while (i < count && fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -494,7 +512,7 @@ void Object::parseMeshNormals(ifstream& fin)
unsigned int nNormals = 0, nFaceNormals = 0;
cerr << "*** MeshNormals\n";
//cout << "*** MeshNormals\n";
while (fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -514,7 +532,9 @@ void Object::parseMeshNormals(ifstream& fin)
nNormals = atoi(token[0].c_str());
readVector(fin, _normals->normals, nNormals);
cerr << "nNormals=" << nNormals << "/" << _normals->normals.size() << endl;
cerr << "* nNormals=" << _normals->normals.size() << endl;
assert(nNormals == _normals->normals.size());
#ifdef NORMALIZE_NORMALS
for (unsigned int i = 0; i < _normals->normals.size(); i++) {
DX::Vector vec = _normals->normals[i];
@@ -528,16 +548,13 @@ void Object::parseMeshNormals(ifstream& fin)
_normals->normals[i] = vec;
}
#endif
assert(nNormals == _normals->normals.size());
}
else if (nFaceNormals == 0) {
// Face normals
nFaceNormals = atoi(token[0].c_str());
readMeshFace(fin, _normals->faceNormals, nFaceNormals);
cerr << "nFaceNormals=" << nFaceNormals << "/" << _normals->faceNormals.size() << endl;
cerr << "* nFaceNormals=" << _normals->faceNormals.size() << endl;
assert(nFaceNormals == _normals->faceNormals.size());
}
}
@@ -552,7 +569,7 @@ void Object::parseMesh(ifstream& fin)
unsigned int nVertices = 0, nFaces = 0;
cerr << "*** Mesh\n";
//cout << "*** Mesh\n";
while (fin.getline(buf, sizeof(buf))) {
// Tokenize
@@ -585,8 +602,7 @@ void Object::parseMesh(ifstream& fin)
nVertices = atoi(token[0].c_str());
readVector(fin, _mesh->vertices, nVertices);
cerr << "nVertices=" << nVertices << "/" << _mesh->vertices.size() << endl;
cerr << "* nVertices=" << _mesh->vertices.size() << endl;
assert(nVertices == _mesh->vertices.size());
}
else if (nFaces == 0) {
@@ -594,8 +610,7 @@ void Object::parseMesh(ifstream& fin)
nFaces = atoi(token[0].c_str());
readMeshFace(fin, _mesh->faces, nFaces);
cerr << "nFaces=" << nFaces << "/" << _mesh->faces.size() << endl;
cerr << "* nFaces=" << _mesh->faces.size() << endl;
assert(nFaces == _mesh->faces.size());
}
else

56
src/osgPlugins/directx/directx.h
View File

@@ -6,18 +6,18 @@
* Loader for DirectX .x files.
* Copyright (c)2002 Ulrich Hertlein <u.hertlein@sandbox.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
@@ -38,6 +38,13 @@ namespace DX {
// Vector
typedef struct {
float x,y,z;
inline void normalize() {
float lenRecip = 1.0f / sqrt(x * x + y * y + z * z);
x *= lenRecip;
y *= lenRecip;
z *= lenRecip;
}
} Vector;
// Coords2d
@@ -105,21 +112,30 @@ namespace DX {
*/
class Object {
public:
/// Constructor; loads filename if non-NULL.
Object(const char* filename = NULL);
/// Constructor.
Object();
/// Destructor.
virtual ~Object();
virtual ~Object() {
clear();
}
/// Load from file; discards old data.
/**
* Load model from file
* Discards old data.
* @param filename Filename.
* @return false if the model could not be loaded, else true.
*/
bool load(const char* filename);
/**
* Generate normals.
* This function generates face normals and binds them to
* every vertex of this face.
* Generate per-vertex normals for the entire model.
* Discards any previously loaded or generated normals.
* @param creaseAngle TODO: The angle above which two adjacent faces are no
* longer considered to belong to a common surface.
* @return false if an error occurred, else true.
*/
bool generateNormals();
bool generateNormals(float creaseAngle = 80.0f);
/// Get MeshTextureCoords.
inline const MeshTextureCoords* getMeshTextureCoords() const {
@@ -170,16 +186,16 @@ namespace DX {
void readMeshTexCoords(std::ifstream& fin);
/// Read index list.
void readIndexList(ifstream& fin, std::vector<unsigned int>& v, unsigned int count);
void readIndexList(std::ifstream& fin, std::vector<unsigned int>& v, unsigned int count);
/// Parse 'MeshMaterialList'.
void parseMeshMaterialList(std::ifstream& fin);
/// Read 'Vector'.
void readVector(ifstream& fin, std::vector<Vector>& v, unsigned int count);
void readVector(std::ifstream& fin, std::vector<Vector>& v, unsigned int count);
/// Read 'MeshFace'.
void readMeshFace(ifstream& fin, std::vector<MeshFace>& v, unsigned int count);
void readMeshFace(std::ifstream& fin, std::vector<MeshFace>& v, unsigned int count);
/// Parse 'MeshNormals'.
void parseMeshNormals(std::ifstream& fin);