♻️ switching to typescript

src/nodes/WebGL/HSV.ts

@@ -0,0 +1,81 @@
+import WebGL from './WebGl';
+import {
+    NumberVar
+} from '../io/AbstractIOSet';
+
+const inputs = {
+    hue: {
+        type: 'Number',
+        default: 0,
+    } as NumberVar,
+    saturation: {
+        type: 'Number',
+        default: 1,
+    } as NumberVar,
+    value: {
+        type: 'Number',
+        default: 1,
+    } as NumberVar
+};
+
+
+export default class HSV extends WebGL<typeof inputs> {
+
+    constructor() {
+        super('HSV', inputs)
+    }
+
+    get frag() {
+        return `
+        precision mediump float;
+
+        // our texture
+        uniform sampler2D u_image;
+
+        // the texCoords passed in from the vertex shader.
+        varying vec2 v_texCoord;
+
+        uniform vec3 u_shift;
+
+        vec3 rgb2hsv(vec3 c) {
+            vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
+            vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
+            vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
+
+            float d = q.x - min(q.w, q.y);
+            float e = 1.0e-10;
+            return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
+        }
+
+        vec3 hsv2rgb(vec3 c) {
+            vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
+            vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
+            return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
+        }
+
+        void main() {
+            vec3 c = rgb2hsv(texture2D(u_image, v_texCoord).rgb);
+            gl_FragColor = vec4(
+                hsv2rgb(vec3(c.x + u_shift.x, c.y * u_shift.y, c.z * u_shift.z)),
+                1
+            );
+        }
+        `
+    }
+
+    get hue() {
+        return ((this.in.hue.value) % 360) / 360;
+    }
+
+    get saturation() {
+        return this.in.saturation.value;
+    }
+
+    get value() {
+        return this.in.value.value;
+    }
+
+    _setParams(gl, program) {
+        gl.uniform3f(gl.getUniformLocation(program, "u_shift"), this.hue, this.saturation, this.value);
+    }
+}