Play around with shaders

fire.glsl

@@ -0,0 +1,38 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform float time;
+uniform vec2 mouse;
+uniform vec2 resolution;
+
+float smove(float value)
+{
+	return (value + 1.0)/2.0;
+}
+
+float rand(vec2 co){
+	return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
+}
+
+void main(void)
+{
+	vec2 pos = gl_FragCoord.xy;  // rename for more meaty code
+	mouse.y = -mouse.y;
+// 	vec2 uv = pos/resolution.xy;
+// 	vec2 muv = mouse/resolution.xy;
+	
+	float scale = 100;
+	float modifier = sin(pos.x/scale + time)*sin(pos.y/scale - time);
+	modifier = smove(modifier);
+	
+	float dist = distance(gl_FragCoord.xy, mouse);
+	float radius = smove(sin(time))*50 + 100;
+	
+	float value = max(1 - dist/radius, 0);
+	value = value + modifier*0.3;
+	
+	value = value + (rand(pos.x*pos.y)-0.5)*0.03;
+	
+	gl_FragColor = vec4(value);
+}