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This commit is contained in:
Brandon Dyck 2022-10-22 09:53:10 -06:00
parent 3c28404b30
commit 16271a79b5
2 changed files with 62 additions and 4 deletions
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9
index.html
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@ -3,13 +3,16 @@
<head>
<script type="module" src="panorama-viewer.js"></script>
<script type="module">
import { hello } from "./panorama-viewer.js";
hello();
import { render } from "./panorama-viewer.js";
window.addEventListener("load", () => {
let viewer = document.getElementById("viewer");
render(viewer);
});
</script>
</head>
<body>
<h1>Panorama Viewer</h1>
<canvas></canvas>
<canvas id="viewer"></canvas>
<img height="400" width="800" src="Provo_River_Falls_360.JPG">
</body>
</html>

57
panorama-viewer.js
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@ -1 +1,56 @@
export const hello = () => console.log("hello world");
export const render = (canvas) => {
let gl = canvas.getContext("webgl");
const vShaderSrc = `
attribute vec3 position;
void main() {
gl_Position = vec4(position, 1);
}
`;
const fShaderSrc = `
void main() {
gl_FragColor = vec4(0.5, 0.5, 0, 1);
}
`;
const compileShader = (src, type) => {
let shader = gl.createShader(type);
gl.shaderSource(shader, src);
gl.compileShader(shader);
let success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
if (!success) {
throw gl.getShaderInfoLog(vShader);
}
return shader;
}
let vShader = compileShader(vShaderSrc, gl.VERTEX_SHADER);
let fShader = compileShader(fShaderSrc, gl.FRAGMENT_SHADER);
let program = gl.createProgram();
gl.attachShader(program, vShader);
gl.attachShader(program, fShader);
gl.linkProgram(program);
let success = gl.getProgramParameter(program, gl.LINK_STATUS);
if (!success) {
throw gl.getProgramInfoLog(program);
}
gl.useProgram(program);
let vertexBuffer = gl.createBuffer();
let vertices = new Float32Array([
0, 0, 0,
1, 0, 0,
1, 1, 0,
]);
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);
let positionLocation = gl.getAttribLocation(program, "position");
gl.enableVertexAttribArray(positionLocation);
gl.vertexAttribPointer(positionLocation, 3, gl.FLOAT, false, 4*3, 0);
gl.drawArrays(gl.TRIANGLES, 0, 3);
}