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  glBufferSubData taking too long!  (Read 592 times)
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Offline Quarry
« Posted 2013-08-16 08:06:46 »



Above is the current issue with my code, I have to update certain VBOs realtime such as the UI so I use glBufferSubData. However after profiling the CPU, I found out that it takes a very long time

After some research I found that glBufferSubData also stalls the rendering until it's completed the rendering

Below is my VertexBuffer class, I'm trying to resolve it. I heard that there's something like glMapBufferRange (?) which helps but I have no idea how to use it

VertexBuffer.java
http://pastebin.com/ZMpJ6kjV

Example use of above is something like;

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VertexBuffer vb = new VertexBuffer(3); // Init

// In a loop
vb.clear();
vb.addVertex(0, 1, 0, 0xFFFFFF, 0, 0);
vb.addVertex(0, 1, 1, 0xFFFFFF, 0, 1);
vb.addVertex(1, 1, 0, 0xFFFFFF, 1, 0);
vb.refresh();

drawVBO(vb);
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