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POAndroid OpenGLES drawing buffer, blank screen
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  1. POAndroid OpenGLES drawing buffer, blank screen
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    copied!<p>Im trying to draw primitives using a FloatBuffer for my vertices and a ShortBuffer for the indexes. Everything works fine with no crashes or warnings but the screen is blank. I can draw with glDrawTexfOES without trouble. If anyone could take a look at the code I would appreciate it alot. </p> <pre><code>public abstract class PrimitiveBase extends DrawableEntity { protected float[] _vertices; protected short[] _indices; private FloatBuffer _verticesBuffer; private ShortBuffer _indicesBuffer; public PrimitiveBase(Sprite sprite, float x, float y) { super(sprite, x, y); } protected abstract void setVertices(); @Override public void draw(float x, float y, float scaleX, float scaleY) { GL10 gl = GlSystem.getGl(); gl.glPushMatrix(); gl.glMatrixMode(GL10.GL_MODELVIEW); gl.glLoadIdentity(); gl.glScalef(scaleX, scaleY, 1.0F); gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glVertexPointer(2, GL10.GL_FLOAT, 0, _verticesBuffer); gl.glColor4f(1.0F, 0, 0, 0); gl.glDrawElements(GL10.GL_TRIANGLES, _indices.length, GL10.GL_UNSIGNED_SHORT, _indicesBuffer); gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); gl.glPushMatrix(); } @Override public void load(EntityManager parent) { setVertices(); ByteBuffer vbb = ByteBuffer.allocateDirect(_vertices.length * 4); vbb.order(ByteOrder.nativeOrder()); _verticesBuffer = vbb.asFloatBuffer(); _verticesBuffer.put(_vertices); _verticesBuffer.position(0); ByteBuffer ibb = ByteBuffer.allocateDirect(_indices.length * 2); ibb.order(ByteOrder.nativeOrder()); _indicesBuffer = ibb.asShortBuffer(); _indicesBuffer.put(_indices); _indicesBuffer.position(0); } } public class Rectangle extends PrimitiveBase { private float _width; private float _heigth; public Rectangle(Sprite sprite, float x, float y, float width, float height) { super(sprite, x, y); _heigth = height; _width = width; } @Override protected void setVertices() { _vertices = new float[8]; _indices = new short[] { 0, 1, 2, 0, 2, 3 }; _vertices[0] = getX() - (_width / 2); _vertices[1] = getY() + (_heigth / 2); _vertices[2] = getX() + (_width / 2); _vertices[3] = getY() + (_heigth / 2); _vertices[4] = getX() + (_width / 2); _vertices[5] = getY() - (_heigth / 2); _vertices[6] = getX() - (_width / 2); _vertices[7] = getY() - (_heigth / 2); } } </code></pre>
 

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