[orx-dnk3] Add feature architecture and post processing effects

orx-noise/src/main/kotlin/phrases/NoisePhrases.kt

@@ -11,6 +11,15 @@ val phraseHash22 = """vec2 hash22(vec2 p) {
 
 val phraseHash21 = "float hash21(vec2 p) { return fract(1e4 * sin(17.0 * p.x + p.y * 0.1) * (0.1 + abs(sin(p.y * 13.0 + p.x)))); }"
 
+val phraseHash33 = """
+#define MOD3 vec3(.1031,.11369,.13787)
+vec3 hash33(vec3 p3) {
+	p3 = fract(p3 * MOD3);
+    p3 += dot(p3, p3.yxz+19.19);
+    return -1.0 + 2.0 * fract(vec3((p3.x + p3.y)*p3.z, (p3.x+p3.z)*p3.y, (p3.y+p3.z)*p3.x));
+}            
+"""
+
 val phraseValueNoise21 = """
     
 float noise(vec2 x) {

orx-noise/src/main/kotlin/phrases/Simplex.kt

@@ -0,0 +1,7 @@
+@file:ShaderPhrases([])
+package org.openrndr.extra.noise.phrases
+
+import org.openrndr.extra.shaderphrases.annotations.ShaderPhrases
+import org.openrndr.extra.shaderphrases.phraseResource
+
+val phraseSimplex3 by phraseResource("/org/openrndr/extra/noise/phrases/gl3/simplex-3.frag")

orx-noise/src/main/resources/org/openrndr/extra/noise/phrases/gl3/simplex-3.frag

@@ -0,0 +1,22 @@
+#pragma import org.openrndr.extra.noise.phrases.NoisePhrasesKt.phraseHash33;
+
+float simplex31(vec3 p) {
+    const float K1 = 0.333333333;
+    const float K2 = 0.166666667;
+
+    vec3 i = floor(p + (p.x + p.y + p.z) * K1);
+    vec3 d0 = p - (i - (i.x + i.y + i.z) * K2);
+
+    // thx nikita: https://www.shadertoy.com/view/XsX3zB
+    vec3 e = step(vec3(0.0), d0 - d0.yzx);
+    vec3 i1 = e * (1.0 - e.zxy);
+    vec3 i2 = 1.0 - e.zxy * (1.0 - e);
+
+    vec3 d1 = d0 - (i1 - 1.0 * K2);
+    vec3 d2 = d0 - (i2 - 2.0 * K2);
+    vec3 d3 = d0 - (1.0 - 3.0 * K2);
+
+    vec4 h = max(0.6 - vec4(dot(d0, d0), dot(d1, d1), dot(d2, d2), dot(d3, d3)), 0.0);
+    vec4 n = h * h * h * h * vec4(dot(d0, hash33(i)), dot(d1, hash33(i + i1)), dot(d2, hash33(i + i2)), dot(d3, hash33(i + 1.0)));
+    return dot(vec4(31.316), n);
+}