Double Buffer

randomcracker · by **randomcracker** » Wed May 11, 2011 6:57 pm

Hi, I've been searching for hours and I've found basically nothing on the subject. My problem is regarding double buffering in OpenGLES. Here is my code:

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Using java Syntax Highlighting

public void draw(GL10 gl, float alpha, float x, float y, float width) {
        
                
                gl.glColor4f(1.0f, 1.0f, 1.0f, alpha);
                
                float[]  coordinates = new float[] {  
                        0, width/_width,
                        width/_width, width/_width, 
                        0, 0,
                        width/_width, 0};
                float height=width;
                float[] vertices = new float[] {        
                        x,                      y,                      .0f,
                        x + width,              y,                      .0f,
                        x,                      y + height,             .0f,
                        x + width,              y + height,             .0f };
                
                FloatBuffer verticeBuff = FloatBuffer.wrap(vertices), coordBuff = FloatBuffer.wrap(coordinates);
                
                gl.glBindTexture(GL10.GL_TEXTURE_2D, tex);
                gl.glVertexPointer(3, GL10.GL_FLOAT, 0, verticeBuff);
                gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, coordBuff);
                gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
                
                
        }
Parsed in 0.031 seconds,  using GeSHi 1.0.8.4

In this code I already have a texture created and everything works actually. My problem comes when I draw textures using this code in a loop, in a tile-like fashion. When I move these on the screen I see flickers of the background everywhere. Is this because of it not double-buffering? That is the only explanation I can see. Is there anyone that could link a good tutorial about duble buffering in OpenGL, or maybe just edit my code, that would be great!
Thanks!

Double Buffer

Double Buffer

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