1 files changed, 35 insertions, 0 deletions

diff --git a/assets/shaders/ReliefTunnel.frag.glsl b/assets/shaders/ReliefTunnel.frag.glsl
new file mode 100644
index 00000000..cee707db
--- /dev/null
+++ b/assets/shaders/ReliefTunnel.frag.glsl
@@ -0,0 +1,35 @@
+#ifdef GL_ES
+precision highp float;
+#endif
+
+uniform vec2 u_resolution;
+uniform float u_time;
+uniform sampler2D u_tex0;
+
+void main(void)
+{
+    vec2 p = -1.0 + 2.0 * gl_FragCoord.xy / u_resolution.xy;
+    vec2 uv;
+
+    float r = sqrt( dot(p,p) );
+    float a = atan(p.y,p.x) + 0.5*sin(0.5*r-0.5*u_time);
+
+    float s = 0.5 + 0.5*cos(7.0*a);
+    s = smoothstep(0.0,1.0,s);
+    s = smoothstep(0.0,1.0,s);
+    s = smoothstep(0.0,1.0,s);
+    s = smoothstep(0.0,1.0,s);
+
+    uv.x = u_time + 1.0/( r + .2*s);
+    uv.y = 3.0*a/3.1416;
+
+    float w = (0.5 + 0.5*s)*r*r;
+
+    vec3 col = texture2D(u_tex0,uv).xyz;
+
+    float ao = 0.5 + 0.5*cos(7.0*a);
+    ao = smoothstep(0.0,0.4,ao)-smoothstep(0.4,0.7,ao);
+    ao = 1.0-0.5*ao*r;
+
+    gl_FragColor = vec4(col*w*ao,1.0);
+}