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  Beginner question: Using vbos with vertexHandle/normalHandle causes trouble  (Read 438 times)
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Offline abe_no_i

Junior Newbie





« Posted 2012-08-15 11:19:35 »

I am loading a 3d model within java by parsing an *.obj file which was created by exporting it out of Blender. So far so good the import is working.
I am storing all vertices and normals coordinates in an 2 ArrayLists<Vector3f>. Thats working.

I am getting into trouble when importing 2 or 3 different models, because glgenBuffers() is returning values 1 and 2 when creating vbo_vertexHandle and vbo_normalHandle for the first object, 3 and 4 for the 2nd object and 5 and 6 for the 3rd object. Do I hav to have ONE global vertexHandle (all vertices of all 3 models) and ONE global normalHandle (all normal indices of all 3 objects) -> so I only have to work with Handles 1 and 2, or may I as I supposed store the vertexHandle and normalHandle for each object within the 3dmodel instance (1 and 2 for obj01, 2 and 3 for obj02...) and using them dependingly on WHICH model I want to render?

Do anyone perhaps know a good src to learn how to deal with 2 or more different 3dobjects ( in java I mean real instances not only drawing  2 quads Wink )?

Thank you for the possible answer.
regards Alexander
Offline ra4king

JGO Kernel


Medals: 342
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« Reply #1 - Posted 2012-08-15 23:20:09 »

glDrawArrays has a 'first' parameter, so you could store all your vertices in 1 VBO and simply specify an offset for each object.

Also, as I said in the other post, using an ArrayList of Vector3f for your thousands of vertices is not a good idea. That's a huge waste of memory.

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