work

1 files changed, 90 insertions, 2 deletions

diff --git a/src/shaders/lake.frag b/src/shaders/lake.frag
index d45917e..c1c23f0 100644
--- a/src/shaders/lake.frag
+++ b/src/shaders/lake.frag
@@ -1,5 +1,93 @@
 precision mediump float;
-uniform vec4 color;
+uniform vec4 black;
+uniform vec4 outline;
+uniform vec4 highlight;
+uniform vec4 foreground;
+uniform vec4 midground;
+uniform vec4 shadow;
+uniform vec4 background;
+uniform vec4 lamp1; //vec3 position, float strength
+uniform vec4 lamp2;
+uniform vec4 lamp3; // max 3 lamps per shaded vertex
+uniform vec4 lamp4;
+uniform vec4 lamp5;
+uniform vec4 lamp6;
+uniform vec4 lamp7;
+uniform vec4 lamp8;
+uniform float streamer; // turn off the noise in the light
+uniform float time; //used for noise
+uniform sampler2D atlas;
+uniform sampler2D previous;
+uniform float nlamps;
+varying vec2 worldxy;
+varying vec2 norm;
+
+// Author @patriciogv - 2015
+float random (vec2 st) {
+	return fract(
+			sin(
+				dot(st.xy,vec2(12.9898,78.233))
+			) *
+			43758.5453123
+	);
+}
+
+// stolen from https://www.shadertoy.com/view/Msf3WH
+float noise( in vec2 p )
+{
+	const float K1 = 0.366025404; // (sqrt(3)-1)/2;
+	const float K2 = 0.211324865; // (3-sqrt(3))/6;
+
+	vec2  i = floor( p + (p.x+p.y)*K1 );
+	vec2  a = p - i + (i.x+i.y)*K2;
+	float m = step(a.y,a.x); 
+	vec2  o = vec2(m,1.0-m);
+	vec2  b = a - o + K2;
+	vec2  c = a - 1.0 + 2.0*K2;
+	vec3  h = max( 0.5-vec3(dot(a,a), dot(b,b), dot(c,c) ), 0.0 );
+	vec3  n = h*h*h*h*vec3( dot(a,random(i+0.0)), dot(b,random(i+o)), dot(c,random(i+1.0)));
+	return dot( n, vec3(70.0) );
+}
+
 void main() {
-	gl_FragColor = color;
+	vec4 coord = gl_FragCoord + vec4(worldxy * 256., 0, 0);
+	/*
+	coord.x -= worldxy.x;
+	coord.y -= worldxy.y;
+	*/
+	//coord = coord / 1000.;
+	// calculate color at this pixel
+	vec4 normal = texture2D(atlas, norm);
+	float color = 0.;
+	vec4 lamp1_norm = lamp1 * 256.;
+	color += lamp1_norm.w - distance(lamp1_norm.xy - worldxy, coord.xy);
+	color = max(color,(lamp2.w * 256.) - distance((lamp2.xy * 256.) - worldxy, coord.xy));
+	color = max(color,(lamp3.w * 256.) - distance((lamp3.xy * 256.) - worldxy, coord.xy));
+	// divide to get a normalized color
+	//color /= (256. * max(max(lamp1.w, lamp2.w), lamp3.w));
+	color /= 256. * 5.;
+	//color = sqrt(color / 2046.);
+	// Sett the normal texture under our lamplight
+	color = dot(vec4(color),normal) / 1.;
+	// make the colors fuzzy near the border (or don't if we're streaming)
+	float rng = random(vec2(coord.x, coord.y) + vec2(color, time));
+	color -= (pow(rng / 1.3, 10. * color)) * streamer;
+	// add noise to the water
+	/* */
+	if(color > 1.)
+		gl_FragColor = highlight * normal.a;
+	else if(color > 0.8)
+		gl_FragColor = foreground * normal.a;
+	else if(color > 0.6)
+		gl_FragColor = midground * normal.a;
+	else if(color > 0.4)
+		gl_FragColor = background * normal.a;
+	else if(color > 0.2)
+		gl_FragColor = shadow * normal.a;
+	else
+		gl_FragColor = black * normal.a;
+	/*
+	gl_FragColor = normal* vec4(color , color, color,1.);
+	*/
+	//gl_FragColor = normal* vec4(color , color / 10., color / 1024.,1.);
 }