*: initial implementation of pig

This is nothing to write home about, but it provides a little sandbox for
developing shader-generated textures in the spirit of shadertoy or the
demoscene tool bonzomatic.

It's more oriented towards developing shaders for use with libstage in
the small games I've been hacking on.

1 files changed, 20 insertions, 0 deletions

diff --git a/sample.fs b/sample.fs
new file mode 100644
index 0000000..e3e0701
--- /dev/null
+++ b/sample.fs
@@ -0,0 +1,20 @@
+#version 120
+
+uniform float alpha;
+uniform float time;
+uniform float T;
+uniform vec3 color;
+uniform float seed; 
+uniform float rand;
+
+void main()
+{
+	float	len = min(length(gl_TexCoord[0].st), 1.f);
+	vec3	c = color;
+	float	a = alpha;
+
+	len *= T;
+	a *= (1.f - (len * len * len * len * len * len * len));
+
+	gl_FragColor = vec4(a * c, a * alpha);
+}