Hello all,
I'm getting illegal argument exception in my Renderer class, here is the
code, see if some one can help me out, i have attached the code and the
exception log:
code:
public class VortexRenderer implements GLSurfaceView.Renderer{
@SuppressWarnings("unused")
private static final String LOG_TAG = VortexRenderer.class.getSimpleName();
private ShortBuffer _indexBuffer;
private FloatBuffer _vertexBuffer;
private FloatBuffer _colorBuffer;
private short[] _indicessArray = {0,1,2};
private int _nr0fvertices = 3;
private float _red = 0f;
private float _green = 0f;
private float _blue = 0f;
private float _angle;
@SuppressWarnings("static-access")
@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config){
gl.glEnableClientState(gl.GL_VERTEX_ARRAY);
gl.glEnableClientState(gl.GL_COLOR_ARRAY);
initTriangle();
}
@Override
public void onSurfaceChanged(GL10 gl, int w, int h) {
gl.glViewport(0, 0, w, h);
}
public void setColor(float r, float g, float b){
_red = r;
_green = g;
_blue = b;
}
public void setAngle(float angle){
_angle = angle;
}
@Override
public void onDrawFrame(GL10 gl) {
// define the color we want to be displayed as the "clipping wall"
gl.glClearColor(_red, _green, _blue, 1.0f);
//reset the matrix - good to fix the rotation to a specific angle
gl.glLoadIdentity();
// clear the color buffer to show the ClearColor we called above...
gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
//set rotation
gl.glRotatef(_angle, 0f, 1f, 0f);
//Drawing the Triangle
//define the vertices we wanth to draw
gl.glVertexPointer(3, GL10.GL_FLOAT, 0, _vertexBuffer);
//Setting the color pointer
gl.glColorPointer(4, GL10.GL_FLOAT, 0, _colorBuffer);
//finally draw the vertices
gl.glDrawElements(GL10.GL_TRIANGLES, _nr0fvertices,
GL10.GL_UNSIGNED_SHORT, _indexBuffer);
}
private void initTriangle(){
//Float has 4 Bytes
ByteBuffer vbb = ByteBuffer.allocateDirect(_nr0fvertices *3 *4);
vbb.order(ByteOrder.nativeOrder());
_vertexBuffer = vbb.asFloatBuffer();
//Short has 4 Bytes
ByteBuffer ibb = ByteBuffer.allocateDirect(_nr0fvertices * 2);
ibb.order(ByteOrder.nativeOrder());
_indexBuffer = ibb.asShortBuffer();
//Float has 4 Bytes, 4 Colors (RGBA)*no of vertices*4 Bytes
ByteBuffer cbb = ByteBuffer.allocate(4*_nr0fvertices*4);
cbb.order(ByteOrder.nativeOrder());
_colorBuffer = cbb.asFloatBuffer();
float[] coords = {
-0.5f, -0.5f, 0f, //(x1, y1, z1)
0.5f, -0.5f, 0f, //(x2, y2, z2)
0f, 0.5f, 0f //(x3, y3, z3)
};
float[] colors={
1f, 0f, 0f, 1f, //Point 1
0f, 1f, 0f, 1f, //Point 2
0f, 0f, 1f, 1f //point 3
};
_vertexBuffer.put(coords);
_indexBuffer.put(_indicessArray);
_colorBuffer.put(colors);
_vertexBuffer.position(0);
_indexBuffer.position(0);
_colorBuffer.position(0);
}
}
exception log:
12-19 08:11:44.691: ERROR/AndroidRuntime(3769):
java.lang.IllegalArgumentException: Must use a native order direct Buffer
12-19 08:11:44.691: ERROR/AndroidRuntime(3769): at
com.google.android.gles_jni.GLImpl.glColorPointerBounds(Native Method)
12-19 08:11:44.691: ERROR/AndroidRuntime(3769): at
com.google.android.gles_jni.GLImpl.glColorPointer(GLImpl.java:211)
12-19 08:11:44.691: ERROR/AndroidRuntime(3769): at
example.Vortex.VortexRenderer.onDrawFrame(VortexRenderer.java:86)
12-19 08:11:44.691: ERROR/AndroidRuntime(3769): at
android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1332)
12-19 08:11:44.691: ERROR/AndroidRuntime(3769): at
android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1116)
--
Thanks & Regards
Raghav Dwivedi
http://about.me/raghavdwivedi
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