MeshShape scale with NxOgre0.9

daedar

11-05-2007 23:48:46

Hi again,

one more question... I'm using MeshShape to auto-detect a static shape from a mesh:

PhysicEngine::getSingleton()->getNxScene()->createBody("Bulding.mesh", new NxOgre::MeshShape("Bulding.mesh"), Vector3(0,10,0), "static: yes");

but I need scaled meshes (not only visually scaled but also physically scaled). With this line : body->getNode()->setScale(...) I can scale the visual mesh but the physic shape isn't scaled.

Any idea?

Thx

daedar

12-05-2007 09:15:43

I tried this:

NxOgre::Body *body = PhysicEngine::getSingleton()->getNxScene()->createBody("Bulding.mesh", new NxOgre::MeshShape("Bulding.mesh"), Vector3(0,10,0), "mesh-scale:"+StringConverter::toString(scaleVector->getScale())+", static: yes");

doesn't seems to work.

betajaen

12-05-2007 09:20:46

At the moment it doesn't seem it's possible with the current code.

I'll add it in though, because other shapes could use the parameter as well, but the code would go:

NxOgre::Body *body = PhysicEngine::getSingleton()->getNxScene()->createBody("Bulding.mesh", new NxOgre::MeshShape("Bulding.mesh","scale:" + StringConverter::toString(scaleVector->getScale() ), Vector3(0,10,0), "static: yes");

Because it's a parameter for the shape and not the body.

[Edit]

The ShapeParams class accepts mesh-scale, and the cooking function has a scale argument, but it seems I haven't tied them together. It seems half of the work was already written for me, by me

daedar

12-05-2007 09:33:16

Ok thx a lot betajaen, I'll have to wait the next commit :wink:

Not a problem for the moment as I'm porting from OgreNewt so I have a lot of other work to do.

daedar

20-05-2007 11:22:52

I know this is really easy to do but here's the patch to have scaled MeshShapes:

Index: include/NxOgreCooking.h

===================================================================

--- include/NxOgreCooking.h	(revision 23)

+++ include/NxOgreCooking.h	(working copy)

@@ -26,7 +26,7 @@

 

 	NxConvexMesh* NxGenerateConvexMeshFromOgreMesh(const NxString& meshname, NxScene *scene, NxVec3 scale = NxVec3(1,1,1));

 	NxConvexMesh* NxGenerateConvexMeshFromVertices(NxVec3 *verts, unsigned int nbVerts, NxScene *scene);

-	NxTriangleMesh* NxGenerateTriangleMeshFromOgreMesh(const NxString&, NxScene *scene);

+	NxTriangleMesh* NxGenerateTriangleMeshFromOgreMesh(const NxString&, NxScene *scene, NxVec3 scale = NxVec3(1,1,1));

 	NxHeightField* NxGenerateHeightFieldFromImage(const NxString& imageFilename, unsigned int nbRows, NxScene *scene);

 

 };

Index: source/NxOgreCooking.cpp

===================================================================

--- source/NxOgreCooking.cpp	(revision 23)

+++ source/NxOgreCooking.cpp	(working copy)

@@ -175,7 +175,7 @@

 	

 	////////////////////////////////////////////////////////////////////////////////////////////////////

 

-	NxTriangleMesh* NxGenerateTriangleMeshFromOgreMesh(const NxString& meshName, NxScene *scene) {

+	NxTriangleMesh* NxGenerateTriangleMeshFromOgreMesh(const NxString& meshName, NxScene *scene, NxVec3 scale) {

 		

 

 	unsigned int	mVertexCount = 0, mIndexCount  = 0;

@@ -247,7 +247,7 @@

 

 			for( size_t j = 0; j < vertex_data->vertexCount; ++j, vertex += vbuf->getVertexSize()) {

 				posElem->baseVertexPointerToElement(vertex, &pReal);

-				mMeshVertices[current_offset + j] = NxVec3(pReal[0], pReal[1], pReal[2]);

+				mMeshVertices[current_offset + j] = NxVec3(pReal[0]*scale.x, pReal[1]*scale.y, pReal[2]*scale.z);

 			}

 

 			vbuf->unlock();

Index: source/NxOgreShapeDescriptionMesh.cpp

===================================================================

--- source/NxOgreShapeDescriptionMesh.cpp	(revision 23)

+++ source/NxOgreShapeDescriptionMesh.cpp	(working copy)

@@ -57,7 +57,7 @@

 

 Shape* MeshShape::_bindToActorDescription(Actor* actor, NxArray<NxShapeDesc*>& shapes) {

 

-	mShapeDescription.meshData = NxGenerateTriangleMeshFromOgreMesh(meshname, actor->getNxScene());

+	mShapeDescription.meshData = NxGenerateTriangleMeshFromOgreMesh(meshname, actor->getNxScene(), mParams.mMeshScale);

 

 #if 0

 	if (mParams.mMaterial != "")

Maybe you'll find it usefull...