copied over shadertoy uniform comments

sdfps.c

@@ -36,7 +36,7 @@ void init(Sdfps* s) { /* TODO: Error checks */
 
 	s -> window = SDL_CreateWindow("sdfps",
 		SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
-		800, 600,
+		512 + 128, 512 + 128,
 		SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
 	s -> context = SDL_GL_CreateContext(s -> window);
 
@@ -57,6 +57,17 @@ void init(Sdfps* s) { /* TODO: Error checks */
 		"#version 330\n"
 		"precision highp float;\n"
 
+		/* ~ from shader toy ~
+		uniform float     iTimeDelta;            // render time (in seconds)
+		uniform int       iFrame;                // shader playback frame
+		uniform float     iChannelTime[4];       // channel playback time (in seconds)
+		uniform vec3      iChannelResolution[4]; // channel resolution (in pixels)
+		uniform vec4      iMouse;                // mouse pixel coords. xy: current (if MLB down), zw: click
+		uniform samplerXX iChannel0..3;          // input channel. XX = 2D/Cube
+		uniform vec4      iDate;                 // (year, month, day, time in seconds)
+		uniform float     iSampleRate;           // sound sample rate (i.e., 44100)
+		*/
+
 		/* viewport resolution (in pixels), z = 1 */
 		"uniform vec3 iResolution;\n"
 		/* playback time in seconds */
@@ -167,7 +178,8 @@ void render(Sdfps *s) {
 	get data back out of a shader, there's probs a more proper way to do it
 	that we could change to later
 	UPDATE: looking at shader toy's source it seems it uses this function to
-	get output for sound shaders
+	get output for sound shaders, so i'm going to guess that it'd be fine of
+	us to render gur sdf feedback into a lower segment of gur frame buffer
 	*/
 	f32 pixels[16 * 16 * 4] = { 0.0f };
 	glReadPixels(