Loading a 50k face object as terrain

[lfrodrigues]

I need to load a 50k faces object as terrain to simulate a ball rolling on it. Can someone please provide me some pointers on what is the best way to load the object?

The file is in Collada format which means I have a list of vertices and a list of triangles, can I use this information?

[bwelch]

I've experimented with using a list of vertices and triangles to create a GImpactshape in Bullet. You may be able to find more info on that via a forum search.

[Tau]

If you want heightmap terrain you can use

Code: Select all

btHeightfieldTerrainShape *m_heightfieldShape = new btHeightfieldTerrainShape(x_width, z_height,
					map1d,
					1,
					mapmin, mapmax,
					1, PHY_FLOAT, false);

I'm using this for 2000x2000 heightmaps ~ 8M triangles
or

Code: Select all

        btTriangleMesh* trimesh = new btTriangleMesh();
	for (int i=0; i<mesh->GetNumFaces(); i++)
	{
		btVector3 p1(vecVertices[indexbuffercopy[i*3]].x, vecVertices[indexbuffercopy[i*3]].y, vecVertices[indexbuffercopy[i*3]].z);
		btVector3 p2(vecVertices[indexbuffercopy[i*3+1]].x, vecVertices[indexbuffercopy[i*3+1]].y, vecVertices[indexbuffercopy[i*3+1]].z);
		btVector3 p3(vecVertices[indexbuffercopy[i*3+2]].x, vecVertices[indexbuffercopy[i*3+2]].y, vecVertices[indexbuffercopy[i*3+2]].z);
		trimesh->addTriangle(p1, p2, p3);
	}
	m_colShape = new btBvhTriangleMeshShape(trimesh, true);

I use this for static models like buildings, caves etc.