public void onDrawFrame(GL10 gl) {
// Redraw background color
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
Log.i("MyGLRenderer", "MyGLRenderer : onDrawFrame() - Starting to set camera position");
float[] mViewMatrix = new float[16];
// Set the camera position (View matrix)
Matrix.setLookAtM(mViewMatrix, 0, 0, 0, -3, 0f, 0f, 0f, 0f, 1.0f, 0.0f);
float[] mMVPMatrix = new float[16];
// Calculate the projection and view transformation
Matrix.multiplyMM(mMVPMatrix, 0, mProjectionMatrix, 0, mViewMatrix, 0);
Log.i("MyGLRenderer", "MyGLRenderer : onDrawFrame() - Drawing ClientSide");
float[] scratch = new float[16];
// Create a rotation transformation for the triangle
long time = SystemClock.uptimeMillis() % 4000L;
float angle = 0.090f * ((int) time);
Matrix.setRotateM(mRotationMatrix, 0, angle, 0, 0, -1.0f);
// Combine the rotation matrix with the projection and camera view
// Note that the mMVPMatrix factor *must be first* in order
// for the matrix multiplication product to be correct.
Matrix.multiplyMM(scratch, 0, mMVPMatrix, 0, mRotationMatrix, 0);
// Draw triangle
mTriangle.draw_ClientSide(scratch);
}
