clouds and better light beam

[faros-demo] / sdr / beam.v.glsl

diff --git a/sdr/beam.v.glsl b/sdr/beam.v.glsl
index a823e8b..6ea5003 100644 (file)
--- a/sdr/beam.v.glsl
+++ b/sdr/beam.v.glsl
@@ -1,9 +1,15 @@
+uniform float beam_len;
+
 void main()
 {
-       float s = gl_Vertex.z + 1.0;
+       float dist = gl_Vertex.z;
+       float s = (dist + 1.0) * 1.6;
 
        vec4 pos = gl_Vertex * vec4(s, s, 1.0, 1.0);
 
        gl_Position = gl_ModelViewProjectionMatrix * pos;
-       gl_FrontColor = gl_Color;
+
+       float d = dist / beam_len;
+       float falloff = min(1.0 - d, 1.0);
+       gl_FrontColor = vec4(gl_Color.xyz, gl_Color.a * falloff);
 }