Introduction to GLSL - Markus Heckmann

Additional Files - goo.gl/VQFDKz
An introduction to GLSL in TouchDesigner covering the basics of the language, some tips on porting shadertoy to TouchDesigner and a walkthrough of a simple particle system.
This workshop was recorded at TouchDesigner Summit held in Berlin Feb 3-4 2018.

[@TheDebonis]

thank you very much

[@jamesleehunter]

Very useful material, thank you!

[@jeffreyhezekiah4975]

A tip : you can watch series at Flixzone. Me and my gf have been using them for watching loads of movies recently.

[@canaaneric9790]

@Jeffrey Hezekiah yup, I have been using Flixzone} for years myself :D

[@lianvan296]

@Jeffrey Hezekiah yea, I've been using Flixzone} for since november myself =)

[@denverhoward3446]

@Jeffrey Hezekiah definitely, been watching on flixzone} for since november myself =)

[@ridgetomas7804]

@Jeffrey Hezekiah yup, I have been using Flixzone} for since december myself :D

[@johndoherty2403]

43:30 I couldn't get the renderSelect to alternate between the different outputs from the color buffer using the Color Buffer Index slider, I got an error "Warning: There is no color buffer for the specified index. (project1/renderselect1)". Anyone else get this ? How can I fix it ?

[@johndoherty2403]

update I found out when you click the GLSL there is an option to select the number of color buffers make sure it matches what you have set to the number of output color buffers you create in the code

[@letmecomentalready]

damn, now I want some club mate.

[@johndoherty2403]

2:04:10 HI again , anyone know why the offset "myOffestP" += (offsetVal)* N and what is the meaning of the normal "N"in this equation. Like what does it do to the vertix position ?

[@TouchDesignerOfficial]

N is usually for (N)ormals

[@To-mos]

It's probably a unit vector of the tangent space.

[@johndoherty2403]

2:27:50 this was done on an older version, the add sop now adds multiple points when the polygon table is enabled, does anyone know how to fix it so its one point again ?

[@TouchDesignerOfficial]

Just turning on "Add Point" on page 1 of the Add SOP does this, I do not think you need polygons table at all. We recommend asking TouchDesigner questions in the forum for quick support. Including your example file is best.

[@NoeliaLorenaFerrario]

drink mate!

[@DeusAmentiam]

12:40 shouldn't "uvst" be "stpq"?

[@ikickss]

I think xyzw, uvst, stpq, and rgba are freely interchangeable. Using one or the other is just a convention.

[@waveFunction25]

@@ikickss correct

[@MrGerdbrecht]

How would uvst and stpq work at the same time? ( i mean the st part, cant be used in two conventions )

[@stefanvonulan1269]

@@MrGerdbrecht uvst is wrong, doesnt work. It's rgba, stpq or xyza - uniquely defined and can't be mixed together

[@nikhilghatnekar]

Vertex Shaders starts at 49:44