tavli: sdr/shadow.v.glsl annotate

tavli

shadows, not completed

author	John Tsiombikas <nuclear@member.fsf.org>
date	Mon, 29 Jun 2015 01:29:36 +0300
parents
children	37dead56f01e

rev	line source
nuclear@18	1 varying vec3 vdir, ldir, normal;
nuclear@18	2 varying vec4 shadow_tc;
nuclear@18	3
nuclear@18	4 void main()
nuclear@18	5 {
nuclear@18	6 gl_Position = ftransform();
nuclear@18	7
nuclear@18	8 vec3 vpos = (gl_ModelViewMatrix * gl_Vertex).xyz;
nuclear@18	9 normal = gl_NormalMatrix * gl_Normal;
nuclear@18	10 vdir = -vpos;
nuclear@18	11 ldir = gl_LightSource[0].position.xyz - vpos;
nuclear@18	12 gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
nuclear@18	13
nuclear@18	14 mat4 offmat = mat4(0.5, 0.0, 0.0, 0.0,
nuclear@18	15 0.0, 0.5, 0.0, 0.0,
nuclear@18	16 0.0, 0.0, 0.5, 0.0,
nuclear@18	17 0.5, 0.5, 0.5, 1.0);
nuclear@18	18 mat4 tex_matrix = offmat * gl_TextureMatrix[1];
nuclear@18	19
nuclear@18	20 shadow_tc = tex_matrix * gl_Vertex;
nuclear@18	21 shadow_tc = shadow_tc / shadow_tc.w;
nuclear@18	22 }