ofMesh copy at different position

[jeg]

Hello,

I am looking for a way to create same shaped ofMesh at different positions. For example, I would like to create two cubes with side 10, one positioned at 0, 0, 0 and another positioned 10, 0, 0. Then I would like to append one to another so that bar (with sides 10, 10, 20) is stored in the ofMesh. I know that I could do that by manipulating vertices, but maybe there is a helper tool? I have found ofxMesh with translation function, but it’s deprecated.

Thank you.

[jeg]

This thread contains the answer:

Adding ofMatrix4x4 transformations to a mesh and go back to the original position

Hi, I’m trying to build an L-System in 3d with OF. In order to do this, i generate a mesh, I apply a transformation to it, and i draw the mesh. The problem is that after transforming the mesh a couple of times, i want to go back to the original position. How can I achieve this? I’ve tried ofPushMatrix and ofPopMatrix, but they are not working as expected, once i pop the matrix out, the position is not where I left it before. That’s the code that decide which transformation to apply to the mesh…

The logic is following:

• cube is created and transformed as ofBoxPrimitive

• getGlobalTransformationMatrix() is used to transform mesh vertices

• cube mesh vertices are appended to the final mesh

  ofBoxPrimitive cube(10, 10, 10);
  cube.move(10, 0, 0); 
  ofMesh & cubeMesh = cube.getMesh();
  auto prevNumVertices = mesh.getNumVertices();
  for(auto & vertex : cubeMesh.getVertices())
  {   
      mesh.addVertex(vertex * cube.getGlobalTransformMatrix());
  }   
  
  for(auto i : cubeMesh.getIndices())
  {   
      mesh.addIndex(i + prevNumVertices);
  }