using a texture for the grid is better

[vrfileman] / sdr / grid.p.glsl

diff --git a/sdr/grid.p.glsl b/sdr/grid.p.glsl
index 86a30a5..825cdc6 100644 (file)
--- a/sdr/grid.p.glsl
+++ b/sdr/grid.p.glsl
@@ -1,23 +1,14 @@
-varying vec3 pos, vpos;
+uniform sampler2D tex;
 
-float grid(vec2 p, float duty)
-{
-       float w = duty * 0.5;
-       p = fract(p);
-       return smoothstep(1.0 - w, 1.0, p.x) + (1.0 - smoothstep(0.0, w, p.x)) +
-               smoothstep(1.0 - w, 1.0, p.y) + (1.0 - smoothstep(0.0, w, p.y));
-}
+varying vec3 vpos;
 
 void main()
 {
-       vec3 p = pos * 500.0;
-
-       const vec3 grid_color = vec3(1.0, 0.2, 0.8);
        const vec3 bg_color = vec3(0.5, 0.1, 1.0);
-       vec3 color = grid_color * grid(p.xz, 0.2);
+       vec3 grid_color = texture2D(tex, gl_TexCoord[0].st).xyz;
 
        float fog = min(abs(vpos.z) * 0.05, 1.0);
 
-       gl_FragColor.xyz = mix(color, bg_color, fog);
+       gl_FragColor.xyz = mix(grid_color, bg_color, fog);
        gl_FragColor.a = 1.0;
 }