3 beginner question on shader


    Nov 27 2013 | 7:03 am
    hi, I have 3 question about shader:
    1 - i don't find ftrasform() in the GLSL reference (http://www.opengl.org/sdk/docs/manglsl/) it's a built-in function of MAX? in this case there's a reference or documentation somewhere?
    2 - what it means the "entry" attributi of the tag in the jxs file? (example @ mat.phong.cg.jxs)
    3 - I notice that MAX don't use GLSL in/out type why?
    Thanks
    Paolo

    • Nov 27 2013 | 10:08 pm
      part of your problem is looking at documentation for the wrong version of glsl.
      Max uses glsl 1.2, so that's what you need to be looking at.
      http://www.opengl.org/registry/doc/GLSLangSpec.Full.1.20.8.pdf
      1- ftransform() simply transforms the vertex identical to how the fixed-function pipeline would tranform it.
      2 - this is a CG file, and therefore the entry-point needs to be defined. simply the name of the function to use as main.
      3 - glsl version 1.2
    • Dec 07 2013 | 7:51 am
      Thanks Rob, sorry for the delay.
      Point 2 isn't very clear for me right now, but I trust you!
      Where can I find a complete reference of the jxs file with all available tags?
      Thanks
      P
    • Dec 09 2013 | 7:16 pm
      check out "Appendix C: The JXS File Format" found in the jitter tutorials section of the ref-docs.
      if anything is unclear, ask back here.