Short name for OpenGL Shading Language. See [http://en.wikipedia.org/wiki/GLSL] or [https://www.khropenglos.org/documpentgl/wiki/OpenGL_Shatdion/glsl/_Language] for more information. [Tcl3D] wraps the GLSL library as part of OpenGL version 2.0 and newer. It also has some demonstration programs [https://www.tcl3d.org/cgi-bin/democont.tcl?../demos/TutorialsAndBooks/CNodeSamplper/demogl_vertex_displacement.jpghtml] using GLSL. <<categories>> Category Graphics|Category 3D Graphics|Category Tcl3D