70 lines
1.8 KiB
JavaScript
70 lines
1.8 KiB
JavaScript
import { Shader } from "./lib/shader.js";
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import { BasicPlane } from "./lib/basic-plane.js";
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import { App } from "./lib/app.js";
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const app = new App({ fov: 20 });
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const gl = app.gl;
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const shader = new Shader(app)
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.attach(
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gl.VERTEX_SHADER,
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`
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attribute vec4 aVertexPosition;
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attribute vec2 aTextureCoord;
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uniform mat4 uModelViewMatrix;
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uniform mat4 uProjectionMatrix;
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varying highp vec2 vTextureCoord;
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void main() {
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gl_Position = uProjectionMatrix * uModelViewMatrix * aVertexPosition;
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vTextureCoord = aTextureCoord;
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}
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`
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)
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.attach(
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gl.FRAGMENT_SHADER,
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`
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precision highp float;
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uniform float uTime;
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uniform float uSinTime;
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uniform float uCosTime;
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varying highp vec2 vTextureCoord;
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vec3 rgb2hsv(vec3 c) {
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vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
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vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
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vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
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float d = q.x - min(q.w, q.y);
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float e = 1.0e-10;
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return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
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}
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vec3 hsv2rgb(vec3 c) {
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vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
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vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
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return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
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}
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void main() {
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vec3 hsv = rgb2hsv(vec3(vTextureCoord, 1.0));
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hsv.x += uTime * 0.0001;
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hsv.y = vTextureCoord.x;
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hsv.z = vTextureCoord.y;
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vec3 rgb = hsv2rgb(hsv);
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gl_FragColor = vec4(rgb, 1.0);
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gl_FragColor = clamp(gl_FragColor, 0.0, 1.0);
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}
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`
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)
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.link();
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const plane = new BasicPlane(app);
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plane.attachShader(shader);
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app.loop();
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