Draw mesh normals

[Isometric God]

Is there an easy way to display a mesh´s normals? I have problems loading a Blender .obj file. The lighting is totally messed up, so I assumed the normals are not right. Thanks

[vitek]

Sure there is. Write a function to do it.

Code: Select all

void IMeshBuffer_drawNormals(scene::IMeshBuffer* mb, video::IVideoDriver* driver, video::SColor color)
{
   if (mb->getVertexType() == video::EVT_STANDARD)
   {
      video::S3DVertex* v = (video::S3DVertex*)mb->getVertices();

      s32 i;
      for (i = 0; i < mb->getVertexCount(); ++i, ++v)
      {
         driver->draw3DLine(v->Pos, v->Pos + v->Normal, color);
      }
   }
}

   
   // call it like this
   // IAnimatedMeshSceneNode* node = /*...*/
   // IMesh* mesh = /* the nodes mesh */
   driver->setTransform(video::ETS_WORLD, node->getAbsoluteTransformation());

   s32 b;
   for (b = 0; b < mesh->getMeshBufferCount(); ++b)
   {
      if (node->isVisible())
        IMeshBuffer_drawNormals( mesh->getMeshBuffer(b), driver, video::SColor(255, 255, 0, 0) );
   }

[Isometric God]

arghs
but thanks
especially you vitek, you helped me many times