public void glBufferSubData(int target, int offset, int size, Buffer data) {
if (data == null)
throw new GdxRuntimeException("Using null for the data not possible, blame LWJGL");
else if (data instanceof ByteBuffer) GL15.glBufferSubData(target, offset, (ByteBuffer) data);
else if (data instanceof IntBuffer) GL15.glBufferSubData(target, offset, (IntBuffer) data);
else if (data instanceof FloatBuffer) GL15.glBufferSubData(target, offset, (FloatBuffer) data);
else if (data instanceof DoubleBuffer)
GL15.glBufferSubData(target, offset, (DoubleBuffer) data);
else if (data instanceof ShortBuffer) //
GL15.glBufferSubData(target, offset, (ShortBuffer) data);
}
@Override
protected void reshape(int width, int height) {
MatrixStack persMatrix = new MatrixStack();
persMatrix.perspective(45.0f, (width / (float) height), zNear, zFar);
ProjectionBlock projData = new ProjectionBlock();
projData.cameraToClipMatrix = persMatrix.top();
glBindBuffer(GL_UNIFORM_BUFFER, projectionUniformBuffer);
glBufferSubData(GL_UNIFORM_BUFFER, 0, projData.fillAndFlipBuffer(mat4Buffer));
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glViewport(0, 0, width, height);
}
public void adjustVertexData(float xOffset, float yOffset) {
newData.clear();
for (int i = 0; i < 12; i += 4) {
newData.put(vertexDataAry[i] + xOffset); // new x
newData.put(vertexDataAry[i + 1] + yOffset); // new y
newData.put(0); // new z
newData.put(1); // new w (clip space value)
}
newData.flip();
glBindBuffer(GL_ARRAY_BUFFER, positionBufferObject);
glBufferSubData(GL_ARRAY_BUFFER, 0, newData);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}