ms9
Updated test structure
Updated test reference images
Bugfix for BC6 texture conversion
* Fixed a bug in the preprocessor which made "#if true" conditions evaluate to false ... We even had a test for this, but it would check for the incorrect result. * Added a new test for this * Added that the visual shader code generator can now include code depending on whether an input or output pin has been connected. Use "#if INPUT_PIN_x_CONNECTED" or "#if OUTPUT_PIN_x_CONNECTED" in the shader snippets. Be careful, this can insert duplicate symbols or conflicting defines, if this is used on nodes which can be instantiated multiple times. It is safest to only us this for the output node.