Use DrawElement with a IntBuffer (transformed in ByteBuffer) for Indexes of element

[Zifiv]

I think we can increase the performance during the render loop.

Actually when we create a cube, for exemple, we need generate and display 36 vertices, 36 texture coordinates, 36 colors and 36 normals, but in fact for make a cube we just need to generate and display 8 of each.

VBO can display objects with a list of unique vertices, a list of unique texture coordinates, a list of unique color, a list of unique normals and a list of unique indexes.

For exemple, for a cube we have :

• 8 vertices, 8 texture coordinates, 8 colors, and 8 normals
• 36 indexes of render

It's better for memory, and better for the render loop.

What do you think about it ?

[sriharshachilakapati]

This is possible, but might be problematic. Assume the case of coloured cube, with one color per face, you can't have indices since there will not be unique colours per vertex. The same happens with textured models too.

[Zifiv]

Maybe use a state for the Batcher who will be true when the batcher is in DrawElement mode with indexes.

And add new function index(int p1Index) like the vertex(float p1X, float p2Y, float p3Z). I've tried it the last night (with fast and not really brainned code), but it was not working...

I will try with more reflexion this week.

[sriharshachilakapati]

Closing this for now, as there are more challenges than the advantages this provides.