data/shaders/swirlytron.frag


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

/*
 * swirlytron.frag
 *
 * Swirly stuff for rendering onto swirly things...
 *
 * (c) 2007-2008 Thomas White <taw27@cam.ac.uk>
 *
 *  thrust3d - a silly game
 *
 */

varying vec2 coords;

uniform float time;

void main() {
	
	vec3 colour;
	float f;
	float r;
	
	r = pow(abs(coords.x), 2.0) + pow(abs(coords.y), 2.0);
	
	f = 1.0 ;//+ (0.5*cos(time/1000.0));
	
	colour.r = 0.0;
	colour.g = 0.0;
	colour.b  = 1.0 * cos(2*f*3.141*r - (time/250.0) );
	
	gl_FragColor = vec4(colour.r, colour.g, colour.b, 1.0);
	
}