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POandroid/ openGL cube with GL_TRIANGLE_FAN
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  1. POandroid/ openGL cube with GL_TRIANGLE_FAN
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    copied!<p>I am some what new to openGL ES and I want to build a simple cube, but seem to be having some problems letting the indice byte buffer that I want to have 4 different TRIANGLE_FANs, how would I go about doing this/ rewriting my code:</p> <pre><code>public class GLCube{ private float vertices[] = { 1, 1, -1, //p0 - topFrontRight 1, -1, -1, //p1 bottomFront Right -1, -1, -1, //p2 bottom front left -1, 1, -1, //p3 front top left 1, 1, 1, //p4 - topBackRight 1, -1, 1, //p5 bottomBack Right -1, -1, 1, //p6 bottom back left -1, 1, 1, //p7 front back left }; private FloatBuffer vertBuff; private short[] pIndex = { 0, 4, 1, 3, //i0 fan of top front right 5, 4, 1, 6, //i1 fan from bottom right back 2, 1, 3, 6, //i2 fan from bottom left front 7, 3, 4, 6 //i3 fan from top left back }; private ShortBuffer pBuff; public GLCube(){ ByteBuffer bBuff = ByteBuffer.allocateDirect(vertices.length * 4); bBuff.order(ByteOrder.nativeOrder()); vertBuff = bBuff.asFloatBuffer(); vertBuff.put(vertices); vertBuff.position(0); ByteBuffer pbBuff = ByteBuffer.allocateDirect(pIndex.length * 2); pbBuff.order(ByteOrder.nativeOrder()); pBuff = pbBuff.asShortBuffer(); pBuff.put(pIndex); pBuff.position(0); } public void draw(GL10 gl){ gl.glFrontFace(GL10.GL_CW); gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertBuff); gl.glDrawElements(GL10.GL_TRIANGLE_FAN, pIndex.length, GL10.GL_UNSIGNED_SHORT, pBuff); gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); } } </code></pre> <p>I assume you have to use GL10.GL_PRIMITIVE_RESTART, but with android, I have don't think this exists...</p>
 

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