gistfile1.txt

	class CubesWithVboWithStride extends Cubes {
		final int mCubeBufferIdx;

		CubesWithVboWithStride(float[] cubePositions, float[] cubeNormals, float[] cubeTextureCoordinates, int generatedCubeFactor) {
			FloatBuffer cubeBuffer = getInterleavedBuffer(cubePositions, cubeNormals, cubeTextureCoordinates, generatedCubeFactor);
			
			// Second, copy these buffers into OpenGL's memory. After, we don't need to keep the client-side buffers around.					
			final int buffers[] = new int[1];
			GLES20.glGenBuffers(1, buffers, 0);

			GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, buffers[0]);
			GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, cubeBuffer.capacity() * BYTES_PER_FLOAT, cubeBuffer, GLES20.GL_STATIC_DRAW);

			GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);

			mCubeBufferIdx = buffers[0];			
			
			cubeBuffer.limit(0);
			cubeBuffer = null;
		}

		@Override
		public void render() {	    
			final int stride = (POSITION_DATA_SIZE + NORMAL_DATA_SIZE + TEXTURE_COORDINATE_DATA_SIZE) * BYTES_PER_FLOAT;
			
			// Pass in the position information
			GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, mCubeBufferIdx);
			GLES20.glEnableVertexAttribArray(mPositionHandle);
			GLES20.glVertexAttribPointer(mPositionHandle, POSITION_DATA_SIZE, GLES20.GL_FLOAT, false, stride, 0);

			// Pass in the normal information
			GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, mCubeBufferIdx);
			GLES20.glEnableVertexAttribArray(mNormalHandle);
			GLES20.glVertexAttribPointer(mNormalHandle, NORMAL_DATA_SIZE, GLES20.GL_FLOAT, false, stride, POSITION_DATA_SIZE * BYTES_PER_FLOAT);
			
			// Pass in the texture information
			GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, mCubeBufferIdx);
			GLES20.glEnableVertexAttribArray(mTextureCoordinateHandle);
			GLES20.glVertexAttribPointer(mTextureCoordinateHandle, TEXTURE_COORDINATE_DATA_SIZE, GLES20.GL_FLOAT, false,
					stride, (POSITION_DATA_SIZE + NORMAL_DATA_SIZE) * BYTES_PER_FLOAT);

			// Clear the currently bound buffer (so future OpenGL calls do not use this buffer).
			GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);

			// Draw the cubes.
			GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, mActualCubeFactor * mActualCubeFactor * mActualCubeFactor * 36);
		}

		@Override
		public void release() {
			// Delete buffers from OpenGL's memory
			final int[] buffersToDelete = new int[] { mCubeBufferIdx };
			GLES20.glDeleteBuffers(buffersToDelete.length, buffersToDelete, 0);
		}
	}