59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
import { main } from "./lib/platform.js";
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import { Shader } from "./lib/shader.js";
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import { BasicPlane } from "./lib/basic-plane.js";
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main((gl, core) => {
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const shader = new Shader(gl)
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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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uniform lowp float uTime;
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uniform lowp float uSinTime;
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uniform lowp float uCosTime;
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varying highp vec2 vTextureCoord;
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void main() {
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lowp float slowedSinTime = sin(uTime*0.001)*0.5+0.5;
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lowp float slowedCosTime = cos(uTime*0.005)*0.5+0.5;
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gl_FragColor = vec4(vTextureCoord.x * 0.5 - slowedSinTime, vTextureCoord.y, vTextureCoord.y * 0.5 + slowedSinTime, 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(gl, core);
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plane.attachShader(shader);
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const render = () => {
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core.clear();
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plane.draw2D();
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if (gl.getError() !== gl.NO_ERROR) {
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throw new Error("WebGL error");
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}
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requestAnimationFrame(render);
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};
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requestAnimationFrame(render);
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});
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