Thanks adam. I asked this topic in stackoverflow and it is solved. Simply; update the coordinate data within the buffer object by using put(index, value) method and then call glbuffersubdata() method. Here is detailed answers: http://stackoverflow.com/questions/5849566/how-to-change-the-content-of-vertexbuffer-used-in-gldrawarrays-method-in-opengles
On May 2, 8:21 pm, Adam Hammer <[email protected]> wrote: > 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 <[email protected]> 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 -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
