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Patch to ReadWriter3DS from Mike Connel.

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This commit is contained in:
Robert Osfield
2002-04-11 17:13:16 +00:00
parent 08522bd7db
commit 421e381f17
1 changed files with 92 additions and 58 deletions
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150
src/osgPlugins/lib3ds/ReaderWriter3DS.cpp
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@@ -102,7 +102,7 @@ class ReaderWriter3DS : public osgDB::ReaderWriter
bool _usePerVertexNormals;
// MIKEC
void processMesh(StateSetMap& drawStateMap,osg::Group* parent,Lib3dsMesh* mesh, Lib3dsMatrix* matrix);
osg::Node* processMesh(StateSetMap& drawStateMap,osg::Group* parent,Lib3dsMesh* mesh, Lib3dsMatrix* matrix);
osg::Node* processNode(StateSetMap drawStateMap,Lib3dsFile *f,Lib3dsNode *node);
};
@@ -191,8 +191,9 @@ void print(Lib3dsNode *node, int level) {
}
// Transforms points by matrix if 'matrix' is not NULL
// Creates a Geode and GeoSet (as parent,child) and adds the Geode to 'parent' parameter
void ReaderWriter3DS::processMesh(StateSetMap& drawStateMap,osg::Group* parent,Lib3dsMesh* mesh, Lib3dsMatrix* matrix) {
// Creates a Geode and GeoSet (as parent,child) and adds the Geode to 'parent' parameter iff 'parent' is non-NULL
// Returns ptr to the Geode
osg::Node* ReaderWriter3DS::processMesh(StateSetMap& drawStateMap,osg::Group* parent,Lib3dsMesh* mesh, Lib3dsMatrix* matrix) {
typedef std::vector<int> FaceList;
typedef std::map<std::string,FaceList> MaterialFaceMap;
MaterialFaceMap materialFaceMap;
@@ -204,6 +205,7 @@ void ReaderWriter3DS::processMesh(StateSetMap& drawStateMap,osg::Group* parent,L
if (materialFaceMap.empty())
{
osg::notify(osg::NOTICE)<<"Warning : no triangles assigned to mesh '"<<mesh->name<<"'"<< std::endl;
return NULL;
}
else
{
@@ -257,18 +259,17 @@ void ReaderWriter3DS::processMesh(StateSetMap& drawStateMap,osg::Group* parent,L
}
}
parent->addChild(geode);
if (parent) parent->addChild(geode);
return geode;
}
}
/**
How to cope with pivot points in 3ds (short version)
All object coordinates in 3ds are stored in world space, this is why you can just rip out the meshes and use/draw them without devling further
Unfortunately, this gets a bit wonky with objects with pivot points (conjucture: PP support is retro fitted into the .3ds format and so doesn't fit perfectly?)
All object coordinates in 3ds are stored in world space, this is why you can just rip out the meshes and use/draw them without meddeling further
Unfortunately, this gets a bit wonky with objects with pivot points (conjecture: PP support is retro fitted into the .3ds format and so doesn't fit perfectly?)
Objects with pivot points have a position relative to their PP, so they have to undergo this transform:
@@ -279,13 +280,17 @@ How to cope with pivot points in 3ds (short version)
*/
osg::Node* ReaderWriter3DS::processNode(StateSetMap drawStateMap,Lib3dsFile *f,Lib3dsNode *node) {
osg::Group* group=new osg::Group;
group->setName(node->name);
osg::Group* group=NULL;// created on demand if we find we have children to group together
// Handle all children of this node for hierarchical assemblies
Lib3dsNode *p;
for (p=node->childs; p!=0; p=p->next) {
group->addChild(processNode(drawStateMap,f,p));
if (!group) {
group =new osg::Group;
group->setName(node->name);
}
group->addChild(processNode(drawStateMap,f,p));
}
// MIKEC: possible BUG - 3ds files APPEAR to enforce unqiue names, so this is OK, but I am not 100% sure
@@ -307,56 +312,85 @@ osg::Node* ReaderWriter3DS::processNode(StateSetMap drawStateMap,Lib3dsFile *f,L
N[3][1]=-object->pivot[1];
N[3][2]=-object->pivot[2];
// Transform object's pivot point to the world origin
osg::Transform* T=new osg::Transform;
osgmatrix.set(
N[0][0],N[0][1],N[0][2],N[0][3],
N[1][0],N[1][1],N[1][2],N[1][3],
N[2][0],N[2][1],N[2][2],N[2][3],
N[3][0],N[3][1],N[3][2],N[3][3]);
T->setMatrix(osgmatrix);
T->setName("3DSPIVOTPOINT: Translate pivotpoint to (world) origin");
//cout<<"Translation for "<<node->name<<" is "<<osgmatrix<<endl;
bool pivoted=false;
if ( (object->pivot[0]!=0.0) || (object->pivot[1]!=0.0) || (object->pivot[2]!=0.0) ) {
pivoted=true; // there is a pivot point, so we must use it
}
// rotate about "origin" (after the transform this is the world origin)
// BUG this matrix also contains the translation to the pivot point - we should plit that out (maybe)
osg::Transform* R=new osg::Transform;
osgmatrix.set(
M[0][0],M[0][1],M[0][2],M[0][3],
M[1][0],M[1][1],M[1][2],M[1][3],
M[2][0],M[2][1],M[2][2],M[2][3],
M[3][0],M[3][1],M[3][2],M[3][3]);
R->setMatrix(osgmatrix);
R->setName("3DSPIVOTPOINT: Rotate");
/*
cout<<"Rotation for "<<node->name<<" is "<<osgmatrix<<endl;
osg::Quat quat;
quat.set(osgmatrix);
osg::Vec3 axis;
float angle;
quat.getRotate(angle,axis);
cout<<"which is "<<osg::RadiansToDegrees(angle)<<" degrees around "<<axis<<endl;
*/
/*
printf("%s---------------\n",node->name);
printf("mesh matrix :\n"); print(mesh->matrix,1);
printf("mesh inverse:\n"); print(mesh_inverse,1);
printf("node matrix :\n"); print(matrix,1);
printf("pivot=%f,%f,%f pos=%f,%f,%f\n",object->pivot[0],object->pivot[1],object->pivot[2],object->pos[0],object->pos[1],object->pos[2]);
*/
/*cout<<"M"<<node->name<<endl;
print(M,0);
cout<<"N"<<endl;
print(N,0);*/
// Always in reverse order...
group->addChild(R);
R->addChild(T);
processMesh(drawStateMap,T,mesh,&mesh_inverse); // creates geometry under modifier node
if (pivoted) {
// Transform object's pivot point to the world origin
osg::Transform* T=new osg::Transform;
osgmatrix.set(
N[0][0],N[0][1],N[0][2],N[0][3],
N[1][0],N[1][1],N[1][2],N[1][3],
N[2][0],N[2][1],N[2][2],N[2][3],
N[3][0],N[3][1],N[3][2],N[3][3]);
T->setMatrix(osgmatrix);
T->setName("3DSPIVOTPOINT: Translate pivotpoint to (world) origin");
//cout<<"Translation for "<<node->name<<" is "<<osgmatrix<<endl;
// rotate about "origin" (after the transform this is the world origin)
// BUG this matrix also contains the translation to the pivot point - we should plit that out (maybe)
osg::Transform* R=new osg::Transform;
osgmatrix.set(
M[0][0],M[0][1],M[0][2],M[0][3],
M[1][0],M[1][1],M[1][2],M[1][3],
M[2][0],M[2][1],M[2][2],M[2][3],
M[3][0],M[3][1],M[3][2],M[3][3]);
R->setMatrix(osgmatrix);
R->setName("3DSPIVOTPOINT: Rotate");
/*
cout<<"Rotation for "<<node->name<<" is "<<osgmatrix<<endl;
osg::Quat quat;
quat.set(osgmatrix);
osg::Vec3 axis;
float angle;
quat.getRotate(angle,axis);
cout<<"which is "<<osg::RadiansToDegrees(angle)<<" degrees around "<<axis<<endl;
*/
/*
printf("%s---------------\n",node->name);
printf("mesh matrix :\n"); print(mesh->matrix,1);
printf("mesh inverse:\n"); print(mesh_inverse,1);
printf("node matrix :\n"); print(matrix,1);
printf("pivot=%f,%f,%f pos=%f,%f,%f\n",object->pivot[0],object->pivot[1],object->pivot[2],object->pos[0],object->pos[1],object->pos[2]);
*/
if (group) {
// Always in reverse order...
group->addChild(R);
R->addChild(T);
processMesh(drawStateMap,T,mesh,&mesh_inverse); // creates geometry under modifier node
return group;
} else {
// We are a pivoted node with no children
R->addChild(T);
processMesh(drawStateMap,T,mesh,&mesh_inverse); // creates geometry under modifier node
return R;
}
} else {
if(group) {
// add our geometry to group (where our children already are)
processMesh(drawStateMap,group,mesh,NULL); // creates geometry under modifier node
return group;
} else {
// didnt use group for children
// return a ptr directly to the Geode for this mesh
return processMesh(drawStateMap,NULL,mesh,NULL);
}
}
} else {
// no mesh for this node - probably a camera or something of that persuasion
//cout << "no mesh for object " << node->name << endl;
return group; // we have no mesh, but we might have children
}
return group;
}
@@ -419,11 +453,11 @@ osgDB::ReaderWriter::ReadResult ReaderWriter3DS::readNode(const std::string& fil
}
}
/*
cout << "Final OSG node structure looks like this:"<< endl;
/*cout << "Final OSG node structure looks like this:"<< endl;
PrintVisitor pv;
group->accept(pv);
*/
group->accept(pv);*/
lib3ds_file_free(f);