resetScissor method
Disables scissor testing.
Subsequent rendering will not be clipped by a scissor rectangle.
Implementation
void resetScissor() {
flush();
if (_renderState.isScissorEnabled) {
gl.disable(GL.SCISSOR_TEST);
_renderState.isScissorEnabled = false;
}
_renderState.scissor.set(0, 0, 0, 0);
}