added colour split shader

1 files changed, 45 insertions, 0 deletions

diff --git a/shaders/colour_splitter.fs b/shaders/colour_splitter.fs
new file mode 100644
index 0000000..1b20175
--- /dev/null
+++ b/shaders/colour_splitter.fs
@@ -0,0 +1,45 @@
+#version 330
+
+#define PI 3.1415926538
+
+// Input vertex attributes (from vertex shader)
+in vec2 fragTexCoord;
+in vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 colDiffuse;
+
+// Output fragment color
+out vec4 finalColor;
+
+// Imported variables from code
+uniform float renderWidth;
+uniform float renderHeight;
+
+// Variable set up
+vec2 flipped = vec2(fragTexCoord.x, 1 - fragTexCoord.y); // flipping
+vec2 textureResolution = vec2(renderWidth, renderHeight);
+vec2 onePixel = vec2(1.0, 1.0) / textureResolution; // distance of a single pixel in texels
+vec2 pixelCoor = flipped * textureResolution;
+
+float gridify(float coordinate, float colour) {
+	return floor((cos( (coordinate * 2.0 * PI) + (colour * ((2.0 / 3.0) * PI)) + (0.4 * PI) ) / 2.0) + 0.75);
+}
+
+vec3 is_pixel(vec2 coordinate) {
+	return vec3(gridify(coordinate.x, 1.0), gridify(coordinate.x, 2.0), gridify(coordinate.x, 3.0));
+}
+
+void main()
+{
+	//float is_pixel = gridify(pixelCoor.x, 1.0) * gridify(pixelCoor.y, 1.0);
+	vec4 texelColor = texture(texture0, flipped);
+	texelColor.rgb *= is_pixel(pixelCoor).rgb;
+	//texelColor.r *= 0;
+	//texelColor.g *= 0;
+	//texelColor.b *= 0;
+
+    // NOTE: Implement here your fragment shader code
+    finalColor = texelColor*colDiffuse;
+}