Real-Time Physics Simulation Forum 2020-11-08T15:07:34+00:00 https://pybullet.org/Bullet/phpBB3/app.php/feed/topic/13102 2020-11-08T15:07:34+00:00 2020-11-08T15:07:34+00:00 https://pybullet.org/Bullet/phpBB3/viewtopic.php?p=43180#p43180 <![CDATA[Create btIndexMesh from WavefronObj]]>
I try to set fields in `btIndexMesh` in order to use geometry that I've read from OBJ file using `tinyObjLoader` lib.
I'm creating the btIndexMesh in a following way.

Code: 

btIndexedMesh indexed_mesh = btIndexedMesh();        indexed_mesh.m_numTriangles = vertex_count / 3;                      indexed_mesh.m_triangleIndexBase = (const unsigned char*) &shapes[s].mesh.indices[0].vertex_index;                                                                            indexed_mesh.m_triangleIndexStride = 3 * sizeof(tinyobj::index_t);            indexed_mesh.m_numVertices = vertex_count;            indexed_mesh.m_vertexBase = (const unsigned char*) &(attrib.vertices[0]);            indexed_mesh.m_vertexStride = 3 * sizeof(float);


As for atrrib and mesh.indices goes:
  • shapes[0].mesh.indices is of type std::vector<tinyobj::index_t> and contains indices of vertices that form triangles (a map from to attrib).
  • attrib.vertices is of type std::vector<float>) and contains all the coordintes of vertices
They are a result of executing `tinyobj::LoadObj` on the *.obj

Here you have the code of the OBJ loader (it's also used in bullet examples).
https://github.com/bulletphysics/bullet ... j_loader.h



So, the code doesn't seem to be right, because I get differnt mesh than using using btTriangleMesh class.
Can some tell me what I'm doing wrong?

Statistics: Posted by arsakes — Sun Nov 08, 2020 3:07 pm

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