[android-developers] Re: opengles question (to change content of vertexbuffer used in gldrawarrays)

Just use get and put on the buffer with your data.memory layout can
vary but typically is xyzxyzxyz which would be the 9 floats that
define your 3 vertices.

Adam

On May 1, 12:27 pm, emre onal <emr...@gmail.com> wrote:
> I have some triangle polygons and drawing them in a traditional way:
> (android-java code)
>
> gl.glDrawArrays(GL10.GL_TRIANGLES, i, j);
>
> I want to update the vertex coordinates of the triangles. All of the
> tutorials I've found use an initial vertex data then only apply
> transformations to them. I need to change each vertex coordinate
> independently.
>
> I change the content of the array which is used to create the related
> vertexbuffer but it doesn't make any change on the screen. Rebuilding the
> vertexbuffer on eachframe doesn't seem to be right way I guess.
>
> Can you point out any example source code at least, if you know any?
>
> --
>
> Emre

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