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);
+}

src/main.cpp

@@ -1,8 +1,47 @@
-// sample code from http://www.glusoft.com/tuto/SFML-shader-example.php
-
 #include <SFML/Graphics.hpp>
 #include <iostream>
 
+/*
+ * UI Modes:
+ * 
+ * 1) generation screen
+ *    - show all chromosomes at once
+ *    - show selection
+ *     - reorder things
+ *     - kill off things
+ *    - ... and breeding
+ *     - fill up things
+ *    - show fitness for individuals?
+ *    - show stats for generation?
+ * 
+ * 2) fitness screen
+ *    - show original image
+ *    - show currently evaluated image
+ *    - allows for pausing/singlestepping
+ *    - show stats at the bottom
+ * 
+ * 3) fast-forward screen
+ *    - show original image
+ *    - show best of previous generation
+ *    - show stats at the bottom
+ * 
+ * logical states:
+ * 1) selection
+ * 2) crossover
+ * 3) mutation
+ * 
+ * program states:
+ * 1) evaluating
+ *    - when going slow: fitness screen
+ *    - when fast-forwarding: fast-forward screen
+ * 2) selecting
+ * 3) crossing over
+ * 4) mutating
+ * Step 2-4
+ *  - in generation screen
+ *  - invisible?
+ */
+
 int main() {
 	const float winW = 800;
 	const float winH = 600;
@@ -43,7 +82,7 @@ int main() {
 		shader.setParameter("time", clk.getElapsedTime().asSeconds());
 		
 		sf::Vector2i mousePos = sf::Mouse::getPosition(window);
-		shader.setParameter("mouse", sf::Vector2f(mousePos.x, mousePos.y - winH/2));
+		shader.setParameter("mouse", sf::Vector2f(mousePos.x, mousePos.y - winH));
 		
 		// Draw the sprite with the shader on it
 		window.clear();