Edge shit

1 files changed, 31 insertions, 1 deletions

diff --git a/assets/shaders/glsl330/postprocessing.fs b/assets/shaders/glsl330/postprocessing.fs
index a2dcb17..cdf23a2 100644
--- a/assets/shaders/glsl330/postprocessing.fs
+++ b/assets/shaders/glsl330/postprocessing.fs
@@ -8,6 +8,11 @@ uniform vec4 colDiffuse;
 
 out vec4 finalColor;
 
+// Edge dection.
+uniform vec2 resolution = vec2(596, 447);
+float edgeFactor = 0.15;
+
+// Color depth.
 float gamma = 0.6;
 float numColors = 11.0;
 
@@ -16,11 +21,36 @@ void main()
     // Texel color fetching from texture sampler
     vec3 texelColor = texture(texture0, fragTexCoord.xy).rgb;
 
+    // Color depth
     texelColor = pow(texelColor, vec3(gamma, gamma, gamma));
     texelColor = texelColor*numColors;
     texelColor = floor(texelColor);
     texelColor = texelColor/numColors;
     texelColor = pow(texelColor, vec3(1.0/gamma));
 
-    finalColor = vec4(texelColor, 1.0);
+    // Edges.
+    float x = 1.0/resolution.x;
+    float y = 1.0/resolution.y;
+
+    vec4 horizEdge = vec4(0.0);
+    horizEdge -= texture(texture0, vec2(fragTexCoord.x - x, fragTexCoord.y - y))*1.0;
+    horizEdge -= texture(texture0, vec2(fragTexCoord.x - x, fragTexCoord.y   ))*2.0;
+    horizEdge -= texture(texture0, vec2(fragTexCoord.x - x, fragTexCoord.y + y))*1.0;
+    horizEdge += texture(texture0, vec2(fragTexCoord.x + x, fragTexCoord.y - y))*1.0;
+    horizEdge += texture(texture0, vec2(fragTexCoord.x + x, fragTexCoord.y   ))*2.0;
+    horizEdge += texture(texture0, vec2(fragTexCoord.x + x, fragTexCoord.y + y))*1.0;
+
+    vec4 vertEdge = vec4(0.0);
+    vertEdge -= texture(texture0, vec2(fragTexCoord.x - x, fragTexCoord.y - y))*1.0;
+    vertEdge -= texture(texture0, vec2(fragTexCoord.x    , fragTexCoord.y - y))*2.0;
+    vertEdge -= texture(texture0, vec2(fragTexCoord.x + x, fragTexCoord.y - y))*1.0;
+    vertEdge += texture(texture0, vec2(fragTexCoord.x - x, fragTexCoord.y + y))*1.0;
+    vertEdge += texture(texture0, vec2(fragTexCoord.x    , fragTexCoord.y + y))*2.0;
+    vertEdge += texture(texture0, vec2(fragTexCoord.x + x, fragTexCoord.y + y))*1.0;
+
+    vec3 edge = sqrt((horizEdge.rgb*horizEdge.rgb) + (vertEdge.rgb*vertEdge.rgb));
+    float edgeGray = (edge.r + edge.g + edge.b) / 3.0;
+    edge = vec3(edgeGray, 0.0, edgeGray);
+
+    finalColor = vec4(texelColor + (edge * edgeFactor), 1.0);
 }