Draw many unique triangles with a single call (for better performance)?

Question

Here is a simple case scenario: http://jsfiddle.net/headchem/r28mm/10/

Is there a way to avoid calling this line for every single triangle I want to make?

gl.drawArrays(gl.TRIANGLES, 0, numItems);

As a training exercise, I am trying to create a 2D game from simple colored triangles. I would like to place several hundred moving triangles on the screen of each frame, but my frame rates are very slow with my current attempts. I suspect that due to hundreds of drawArrays () calls, I am making every frame.

I read a little about Vertex Buffer Objects, and this question sounds promising , but it's hard for me to put together all the parts in my demonstration of the violin above. Is it possible to create hundreds of unique two-dimensional triangular shapes + different colors + transparency in one callback with good performance?

Answer 1

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, / , .

VBO, , , VBO, " ". , ( ), VBO, . , 1 .

, per-vertex .