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No commits in common. "main" and "u01" have entirely different histories.
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@ -4,69 +4,24 @@
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>CG1 MDI</title>
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<script src="matrix-math.js"></script>
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<script src="shader.js"></script>
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<script src="wavefront.js"></script>
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<script src="script.js"></script>
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<style>
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:root {
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font-size: 20px;
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--padding: 10px;
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}
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html, body {
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margin: 0;
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height: 100%;
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}
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body {
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padding: 1vw;
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box-sizing: border-box;
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display: flex;
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justify-content: center;
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align-items: center;
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min-height: 100vh;
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margin: 0;
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background-color: #1e1e2e;
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color: #cdd6f4;
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font-family: monospace;
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overflow: hidden;
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}
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#display {
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position: relative;
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overflow: hidden;
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box-sizing: border-box;
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border-radius: 20px;
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height: 100%;
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width: 100%;
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border: solid 2px #11111b;
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}
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#cv {
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position: relative;
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max-width: 100%;
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max-height: 100%;
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width: 100%;
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height: 100%;
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display: block;
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background-color: #181825;
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}
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#stats {
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position: absolute;
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top: var(--padding);
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padding: var(--padding);
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display: block;
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border: solid 2px #11111b;
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background-color: #313244;
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border: solid 2px black;
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border-radius: 20px;
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}
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#stats {
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right: var(--padding);
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}
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</style>
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</head>
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<body>
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<div id="display">
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<canvas id="cv"></canvas>
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<div id="stats">
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FPS: <span id="fps"></span> - <span id="ms"></span>
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</div>
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</div>
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<canvas id="cv" width="800" height="600"></canvas>
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</body>
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</html>
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@ -1,530 +0,0 @@
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"use strict";
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/**
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* overwrites a 4x4 matrix with the identity matrix
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*/
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function mat4Identity(mat) {
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for (let i = 0; i < 16; i++) {
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mat[i] = (i % 5 == 0) ? 1 : 0;
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}
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}
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/**
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* copies a mat4 from src to dst
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*/
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function mat4Copy(src, dst) {
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for (let i = 0; i < 16; i++) {
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dst[i] = src[i];
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}
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}
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/**
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* sets all the values in a mat4 to zero
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*/
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function mat4Empty(mat) {
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for (let i = 0; i < 16; i++) {
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mat[i] = 0;
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}
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}
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/**
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* mutliplies A with B and stores the result in result
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*/
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function mat4Multiply(result, A, B) {
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// if result is one of the arguments, modify copy instead of result directly
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if (result == A || result == B) {
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let tempResult = [];
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mat4Multiply(tempResult, A, B);
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mat4Copy(tempResult, result);
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return;
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}
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// loops over cells of the result matrix
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for (let i = 0; i < 16; i++) {
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let col = (i / 4) | 0;
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let row = i % 4;
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// initialise current cell with 0
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result[i] = 0;
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// loop over the row of A and column of B
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// continuously adding the multiplication of the two values to the result cell
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for (let j = 0; j < 4; j++) {
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result[i] += A[row + j * 4] * B[j + col * 4];
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}
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}
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}
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/**
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* prints a mat4 to the screen
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*/
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function mat4Print(m) {
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let str = "";
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for (let i = 0; i < 4; i++) {
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for (let j = 0; j < 4; j++) {
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str += m[j * 4 + i] + " ";
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}
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str += "\n";
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}
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console.log(str);
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}
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/**
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* translates by the vector v
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*/
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function mat4Translate(out, inm, v) {
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let t = [];
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mat4Identity(t);
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t[12] = v[0];
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t[13] = v[1];
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t[14] = v[2];
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mat4Multiply(out, t, inm);
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}
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/**
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* scales by the vector v
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*/
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function mat4Scale(out, inm, v) {
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let t = [];
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mat4Identity(t);
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t[0] = v[0];
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t[5] = v[1];
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t[10] = v[2];
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mat4Multiply(out, t, inm);
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}
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/**
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* rotates around the X axis by the angle a (in radians)
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*/
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function mat4RotateX(out, inm, a) {
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let t = [];
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mat4Identity(t);
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t[5] = Math.cos(a);
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t[6] = Math.sin(a);
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t[9] = -Math.sin(a);
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t[10] = Math.cos(a);
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mat4Multiply(out, t, inm);
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}
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/**
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* rotates around the Y axis by the angle a (in radians)
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*/
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function mat4RotateY(out, inm, a) {
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let t = [];
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mat4Identity(t);
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t[0] = Math.cos(a);
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t[2] = -Math.sin(a);
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t[8] = Math.sin(a);
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t[10] = Math.cos(a);
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mat4Multiply(out, t, inm);
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}
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/**
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* rotates around the Z axis by the angle a (in radians)
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*/
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function mat4RotateZ(out, inm, a) {
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let t = [];
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mat4Identity(t);
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t[0] = Math.cos(a);
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t[1] = Math.sin(a);
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t[4] = -Math.sin(a);
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t[5] = Math.cos(a);
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mat4Multiply(out, t, inm);
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}
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/**
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* builds a look-at matrix, overwriting out
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* eye is the position of the camera
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* look is the position of the target to be looked at
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* up is the up vector
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*/
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function mat4BuildLookAt(out, eye, look, up) {
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let n = [];
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let u = [];
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let v = [];
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let t = [];
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vec3Subtract(n, eye, look);
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vec3CrossProduct(u, up, n);
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vec3CrossProduct(v, n, u);
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vec3Normalise(n, n);
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vec3Normalise(u, u);
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vec3Normalise(v, v);
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t[0] = - vec3DotProduct(u, eye);
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t[1] = - vec3DotProduct(v, eye);
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t[2] = - vec3DotProduct(n, eye);
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out[0] = u[0]; out[4] = u[1]; out[8] = u[2]; out[12] = t[0];
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out[1] = v[0]; out[5] = v[1]; out[9] = v[2]; out[13] = t[1];
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out[2] = n[0]; out[6] = n[1]; out[10] = n[2]; out[14] = t[2];
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out[3] = 0; out[7] = 0; out[11] = 0; out[15] = 1;
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}
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/**
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* builds a projection matrix, overwriting out
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* r, l, t, b are the right, left, top and bottom of the frustum
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* n and f are the distance of the near and far planes from the camera
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*/
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function mat4BuildProjection(out, r, l, t, b, n, f) {
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mat4Identity(out);
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out[0] = 2.0 / (r - l);
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out[5] = 2.0 / (t - b);
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out[8] = 1.0 / n * (r + l) / (r - l);
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out[9] = 1.0 / n * (t + b) / (t - b);
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out[10] = -1.0 / n * (f + n) / (f - n);
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out[11] = -1.0 / n;
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out[14] = - 2.0 * f / (f - n);
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out[15] = 0.0;
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}
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/**
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* builds a perspective projection matrix, overwriting out
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* fovy is the field of view in the y direction
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* aspect is the aspect ratio
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* n and f are the distance of the near and far planes from the camera
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*/
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function mat4BuildPerspective(out, fovy, aspect, n, f) {
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let t = n * Math.tan(0.5 * fovy);
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let b = -t;
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let r = aspect * t;
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let l = -r;
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mat4BuildProjection(out, r, l, t, b, n, f);
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}
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/**
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* linearly interpolates between a and b, storing the result in out
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*/
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function mat4Interpolate(out, a, b, f) {
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for (let i = 0; i < 16; i++) {
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out[i] = (1 - f) * a[i] + f * b[i];
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}
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}
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function mat4From3(out, inm) {
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mat4Identity(out);
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out[0] = inm[0];
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out[1] = inm[1];
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out[2] = inm[2];
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out[4] = inm[3];
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out[5] = inm[4];
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out[6] = inm[5];
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out[8] = inm[6];
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out[9] = inm[7];
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out[10] = inm[8];
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}
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/**
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* https://stackoverflow.com/questions/1148309/inverting-a-4x4-matrix
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*/
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function mat4Inverse(out, m) {
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let inv = [];
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let det;
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let i;
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inv[0] = m[5] * m[10] * m[15] -
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m[5] * m[11] * m[14] -
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m[9] * m[6] * m[15] +
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m[9] * m[7] * m[14] +
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m[13] * m[6] * m[11] -
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m[13] * m[7] * m[10];
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inv[4] = -m[4] * m[10] * m[15] +
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m[4] * m[11] * m[14] +
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m[8] * m[6] * m[15] -
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m[8] * m[7] * m[14] -
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m[12] * m[6] * m[11] +
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m[12] * m[7] * m[10];
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inv[8] = m[4] * m[9] * m[15] -
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m[4] * m[11] * m[13] -
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m[8] * m[5] * m[15] +
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m[8] * m[7] * m[13] +
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m[12] * m[5] * m[11] -
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m[12] * m[7] * m[9];
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inv[12] = -m[4] * m[9] * m[14] +
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m[4] * m[10] * m[13] +
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m[8] * m[5] * m[14] -
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m[8] * m[6] * m[13] -
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m[12] * m[5] * m[10] +
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m[12] * m[6] * m[9];
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inv[1] = -m[1] * m[10] * m[15] +
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m[1] * m[11] * m[14] +
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m[9] * m[2] * m[15] -
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m[9] * m[3] * m[14] -
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m[13] * m[2] * m[11] +
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m[13] * m[3] * m[10];
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inv[5] = m[0] * m[10] * m[15] -
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m[0] * m[11] * m[14] -
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m[8] * m[2] * m[15] +
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m[8] * m[3] * m[14] +
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m[12] * m[2] * m[11] -
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m[12] * m[3] * m[10];
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inv[9] = -m[0] * m[9] * m[15] +
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m[0] * m[11] * m[13] +
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m[8] * m[1] * m[15] -
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m[8] * m[3] * m[13] -
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m[12] * m[1] * m[11] +
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m[12] * m[3] * m[9];
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inv[13] = m[0] * m[9] * m[14] -
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m[0] * m[10] * m[13] -
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m[8] * m[1] * m[14] +
|
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m[8] * m[2] * m[13] +
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m[12] * m[1] * m[10] -
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m[12] * m[2] * m[9];
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inv[2] = m[1] * m[6] * m[15] -
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m[1] * m[7] * m[14] -
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m[5] * m[2] * m[15] +
|
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m[5] * m[3] * m[14] +
|
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m[13] * m[2] * m[7] -
|
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m[13] * m[3] * m[6];
|
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inv[6] = -m[0] * m[6] * m[15] +
|
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m[0] * m[7] * m[14] +
|
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m[4] * m[2] * m[15] -
|
||||
m[4] * m[3] * m[14] -
|
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m[12] * m[2] * m[7] +
|
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m[12] * m[3] * m[6];
|
||||
|
||||
inv[10] = m[0] * m[5] * m[15] -
|
||||
m[0] * m[7] * m[13] -
|
||||
m[4] * m[1] * m[15] +
|
||||
m[4] * m[3] * m[13] +
|
||||
m[12] * m[1] * m[7] -
|
||||
m[12] * m[3] * m[5];
|
||||
|
||||
inv[14] = -m[0] * m[5] * m[14] +
|
||||
m[0] * m[6] * m[13] +
|
||||
m[4] * m[1] * m[14] -
|
||||
m[4] * m[2] * m[13] -
|
||||
m[12] * m[1] * m[6] +
|
||||
m[12] * m[2] * m[5];
|
||||
|
||||
inv[3] = -m[1] * m[6] * m[11] +
|
||||
m[1] * m[7] * m[10] +
|
||||
m[5] * m[2] * m[11] -
|
||||
m[5] * m[3] * m[10] -
|
||||
m[9] * m[2] * m[7] +
|
||||
m[9] * m[3] * m[6];
|
||||
|
||||
inv[7] = m[0] * m[6] * m[11] -
|
||||
m[0] * m[7] * m[10] -
|
||||
m[4] * m[2] * m[11] +
|
||||
m[4] * m[3] * m[10] +
|
||||
m[8] * m[2] * m[7] -
|
||||
m[8] * m[3] * m[6];
|
||||
|
||||
inv[11] = -m[0] * m[5] * m[11] +
|
||||
m[0] * m[7] * m[9] +
|
||||
m[4] * m[1] * m[11] -
|
||||
m[4] * m[3] * m[9] -
|
||||
m[8] * m[1] * m[7] +
|
||||
m[8] * m[3] * m[5];
|
||||
|
||||
inv[15] = m[0] * m[5] * m[10] -
|
||||
m[0] * m[6] * m[9] -
|
||||
m[4] * m[1] * m[10] +
|
||||
m[4] * m[2] * m[9] +
|
||||
m[8] * m[1] * m[6] -
|
||||
m[8] * m[2] * m[5];
|
||||
|
||||
det = m[0] * inv[0] + m[1] * inv[4] + m[2] * inv[8] + m[3] * inv[12];
|
||||
|
||||
if (det == 0) {
|
||||
mat4Copy(m, out); // singular matrix, can't invert
|
||||
return;
|
||||
}
|
||||
|
||||
det = 1.0 / det;
|
||||
|
||||
for (i = 0; i < 16; i++)
|
||||
out[i] = inv[i] * det;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
function mat4vec4Multiply(out, inMat, inVec) {
|
||||
let result = [0, 0, 0, 0];
|
||||
for (let i = 0; i < 4; i++) {
|
||||
for (let j = 0; j < 4; j++) {
|
||||
result[i] += inMat[i + j * 4] * inVec[j];
|
||||
}
|
||||
}
|
||||
out[0] = result[0];
|
||||
out[1] = result[1];
|
||||
out[2] = result[2];
|
||||
out[3] = result[3];
|
||||
}
|
||||
|
||||
/**
|
||||
* subtracts b from a, storing the result in out
|
||||
*/
|
||||
function vec3Subtract(out, a, b) {
|
||||
out[0] = a[0] - b[0];
|
||||
out[1] = a[1] - b[1];
|
||||
out[2] = a[2] - b[2];
|
||||
}
|
||||
|
||||
/**
|
||||
* calculates the cross product of a and b, storing the result in out
|
||||
*/
|
||||
function vec3CrossProduct(out, a, b) {
|
||||
let result = [];
|
||||
result[0] = a[1] * b[2] - a[2] * b[1];
|
||||
result[1] = a[2] * b[0] - a[0] * b[2];
|
||||
result[2] = a[0] * b[1] - a[1] * b[0];
|
||||
|
||||
out[0] = result[0];
|
||||
out[1] = result[1];
|
||||
out[2] = result[2];
|
||||
}
|
||||
|
||||
/**
|
||||
* normalizes in storing the result in out
|
||||
*/
|
||||
function vec3Normalise(out, inv) {
|
||||
let length = vec3Length(inv);
|
||||
out[0] = inv[0] / length;
|
||||
out[1] = inv[1] / length;
|
||||
out[2] = inv[2] / length;
|
||||
}
|
||||
|
||||
/**
|
||||
* returns the length of the vector in
|
||||
*/
|
||||
function vec3Length(inv) {
|
||||
return Math.sqrt(inv[0] * inv[0] + inv[1] * inv[1] + inv[2] * inv[2]);
|
||||
}
|
||||
|
||||
/**
|
||||
* returns the dot product of the vectors a and b
|
||||
*/
|
||||
function vec3DotProduct(a, b) {
|
||||
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
|
||||
}
|
||||
|
||||
/**
|
||||
* sets the values of out to x, y and z
|
||||
*/
|
||||
function vec3Set(out, x, y, z) {
|
||||
out[0] = x;
|
||||
out[1] = y;
|
||||
out[2] = z;
|
||||
}
|
||||
|
||||
|
||||
function mat3Copy(src, dst) {
|
||||
for (let i = 0; i < 9; i++) {
|
||||
dst[i] = src[i];
|
||||
}
|
||||
}
|
||||
|
||||
function mat3From4(out, inm) {
|
||||
out[0] = inm[0];
|
||||
out[1] = inm[1];
|
||||
out[2] = inm[2];
|
||||
|
||||
out[3] = inm[4];
|
||||
out[4] = inm[5];
|
||||
out[5] = inm[6];
|
||||
|
||||
out[6] = inm[8];
|
||||
out[7] = inm[9];
|
||||
out[8] = inm[10];
|
||||
}
|
||||
|
||||
function mat3Transpose(out, inm) {
|
||||
let result = [];
|
||||
|
||||
for (let i = 0; i < 3; i++) {
|
||||
for (let j = 0; j < 3; j++) {
|
||||
result[i * 3 + j] = inm[j * 3 + i];
|
||||
}
|
||||
}
|
||||
|
||||
mat3Copy(result, out);
|
||||
}
|
||||
|
||||
function mat3Minor(out, inm) {
|
||||
let result = [];
|
||||
|
||||
// TODO: check if this is correct
|
||||
result[0] = inm[4] * inm[8] - inm[5] * inm[7];
|
||||
result[1] = inm[3] * inm[8] - inm[5] * inm[6];
|
||||
result[2] = inm[3] * inm[7] - inm[4] * inm[6];
|
||||
|
||||
result[3] = inm[1] * inm[8] - inm[2] * inm[7];
|
||||
result[4] = inm[0] * inm[8] - inm[2] * inm[6];
|
||||
result[5] = inm[0] * inm[7] - inm[1] * inm[6];
|
||||
|
||||
result[6] = inm[1] * inm[5] - inm[2] * inm[4];
|
||||
result[7] = inm[0] * inm[5] - inm[2] * inm[3];
|
||||
result[8] = inm[0] * inm[4] - inm[1] * inm[3];
|
||||
|
||||
mat3Copy(result, out);
|
||||
}
|
||||
|
||||
function mat3Cofactor(out, inm) {
|
||||
mat3Minor(out, inm);
|
||||
|
||||
out[1] *= -1;
|
||||
out[3] *= -1;
|
||||
out[5] *= -1;
|
||||
out[7] *= -1;
|
||||
}
|
||||
|
||||
function mat3Adjoint(out, inm) {
|
||||
mat3Cofactor(out, inm);
|
||||
mat3Transpose(out, inm);
|
||||
}
|
||||
|
||||
function mat3MultiplyScalar(out, inm, x) {
|
||||
for (let i = 0; i < 9; i++) {
|
||||
out[i] = inm[i] * x;
|
||||
}
|
||||
}
|
||||
|
||||
function mat3Determinant(m) {
|
||||
return + m[0] * m[4] * m[8] + m[3] * m[7] * m[2] + m[6] * m[1] * m[5] - m[2] * m[4] * m[6] - m[5] * m[7] * m[0] - m[8] * m[1] * m[3];
|
||||
}
|
||||
|
||||
function mat3Inverse(out, inm) {
|
||||
let result = [];
|
||||
mat3Adjoint(result, inm);
|
||||
mat3MultiplyScalar(result, result, 1 / mat3Determinant(inm));
|
||||
mat3Copy(result, out);
|
||||
}
|
||||
|
||||
function mat3MakeNormal(out, inm) {
|
||||
let result = [];
|
||||
mat3From4(result, inm);
|
||||
mat3Inverse(result, result);
|
||||
mat3Transpose(result, result);
|
||||
mat3Copy(result, out);
|
||||
}
|
||||
|
|
@ -1,34 +0,0 @@
|
|||
# Blender 4.4.3
|
||||
# www.blender.org
|
||||
o Cube
|
||||
v 1.000000 1.000000 -1.000000
|
||||
v 1.000000 -1.000000 -1.000000
|
||||
v 1.000000 1.000000 1.000000
|
||||
v 1.000000 -1.000000 1.000000
|
||||
v -1.000000 1.000000 -1.000000
|
||||
v -1.000000 -1.000000 -1.000000
|
||||
v -1.000000 1.000000 1.000000
|
||||
v -1.000000 -1.000000 1.000000
|
||||
vn -0.0000 1.0000 -0.0000
|
||||
vn -0.0000 -0.0000 1.0000
|
||||
vn -1.0000 -0.0000 -0.0000
|
||||
vn -0.0000 -1.0000 -0.0000
|
||||
vn 1.0000 -0.0000 -0.0000
|
||||
vn -0.0000 -0.0000 -1.0000
|
||||
vt 1.000000 0.000000
|
||||
vt 0.000000 1.000000
|
||||
vt 0.000000 0.000000
|
||||
vt 1.000000 1.000000
|
||||
s 0
|
||||
f 5/1/1 3/2/1 1/3/1
|
||||
f 3/1/2 8/2/2 4/3/2
|
||||
f 7/1/3 6/2/3 8/3/3
|
||||
f 2/1/4 8/2/4 6/3/4
|
||||
f 1/1/5 4/2/5 2/3/5
|
||||
f 5/1/6 2/2/6 6/3/6
|
||||
f 5/1/1 7/4/1 3/2/1
|
||||
f 3/1/2 7/4/2 8/2/2
|
||||
f 7/1/3 5/4/3 6/2/3
|
||||
f 2/1/4 4/4/4 8/2/4
|
||||
f 1/1/5 3/4/5 4/2/5
|
||||
f 5/1/6 1/4/6 2/2/6
|
||||
33819
src/obj/monkey.obj
33819
src/obj/monkey.obj
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
16109
src/obj/teapot.obj
16109
src/obj/teapot.obj
File diff suppressed because it is too large
Load Diff
250
src/script.js
250
src/script.js
|
|
@ -4,235 +4,87 @@ let cv, gl;
|
|||
|
||||
let program;
|
||||
|
||||
class Object {
|
||||
vertexBuffer;
|
||||
numVertices;
|
||||
}
|
||||
|
||||
let o = new Object();
|
||||
|
||||
let lastFrame = Date.now();
|
||||
|
||||
let cameraPitch = 0.565;
|
||||
let cameraYaw = 0.375;
|
||||
let cameraDistance = 4;
|
||||
let smoothCameraDistance = 4;
|
||||
|
||||
let mouseDragging = false;
|
||||
|
||||
let frameTimes = [];
|
||||
|
||||
function resizeCanvas() {
|
||||
const dpr = window.devicePixelRatio;
|
||||
cv.width = cv.parentElement.clientWidth * dpr;
|
||||
cv.height = cv.parentElement.clientHeight * dpr;
|
||||
gl.viewport(0, 0, cv.width, cv.height);
|
||||
}
|
||||
let vertexBuffer;
|
||||
|
||||
async function init() {
|
||||
cv = document.getElementById("cv");
|
||||
|
||||
gl = cv.getContext("webgl");
|
||||
|
||||
if (!gl) {
|
||||
window.alert("WebGL not supported");
|
||||
}
|
||||
|
||||
const resizeObserver = new ResizeObserver(resizeCanvas);
|
||||
resizeObserver.observe(cv.parentElement);
|
||||
resizeCanvas();
|
||||
|
||||
|
||||
// input handling
|
||||
cv.addEventListener("mousedown", (e) => {
|
||||
if (e.button == 0) {
|
||||
mouseDragging = true;
|
||||
}
|
||||
});
|
||||
document.addEventListener("mouseup", (e) => {
|
||||
if (e.button == 0) {
|
||||
mouseDragging = false;
|
||||
}
|
||||
});
|
||||
document.addEventListener("mouseleave", (e) => {
|
||||
mouseDragging = false;
|
||||
});
|
||||
|
||||
document.addEventListener("mousemove", (e) => {
|
||||
if (mouseDragging) {
|
||||
cameraYaw += e.movementX / 100;
|
||||
cameraPitch += e.movementY / 100;
|
||||
|
||||
if (cameraPitch < -Math.PI / 2) cameraPitch = -Math.PI / 2;
|
||||
if (cameraPitch > Math.PI / 2) cameraPitch = Math.PI / 2;
|
||||
}
|
||||
});
|
||||
cv.addEventListener("wheel", (e) => {
|
||||
cameraDistance += e.deltaY / 100;
|
||||
if (cameraDistance < 1) cameraDistance = 1;
|
||||
if (cameraDistance > 15) cameraDistance = 15;
|
||||
e.preventDefault();
|
||||
});
|
||||
// end input handling
|
||||
|
||||
console.log("compiling shaders...");
|
||||
program = await buildShaderProgram(gl, "shaders/vertex.glsl", "shaders/fragment.glsl");
|
||||
|
||||
console.log("compiling vertex shader...");
|
||||
let vertexShader = await fetchAndCompileShader(gl, gl.VERTEX_SHADER, "shaders/vertex.glsl");
|
||||
|
||||
console.log("compiling fragment shader...");
|
||||
let fragmentShader = await fetchAndCompileShader(gl, gl.FRAGMENT_SHADER, "shaders/fragment.glsl");
|
||||
|
||||
console.log("linking shader program...");
|
||||
program = linkShaderProgram(gl, vertexShader, fragmentShader);
|
||||
|
||||
|
||||
let triangleVertices = [
|
||||
// X // Y // R // G // B
|
||||
0.0, 0.5, 0.0, 1.0, 1.0,
|
||||
-0.5, -0.5, 1.0, 0.0, 1.0,
|
||||
0.5, -0.5, 1.0, 1.0, 0.0
|
||||
];
|
||||
|
||||
console.log("creating vertex buffer");
|
||||
|
||||
vertexBuffer = gl.createBuffer();
|
||||
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
|
||||
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(triangleVertices), gl.STATIC_DRAW);
|
||||
|
||||
let f = await readObjFile("obj/smooth_monkey.obj");
|
||||
o = new Object();
|
||||
// get location of vertPosition attribute
|
||||
let positionAttribLocation = gl.getAttribLocation(program, "vertPosition");
|
||||
|
||||
o.vertexBuffer = gl.createBuffer();
|
||||
o.numVertices = f.length / 8;
|
||||
gl.bindBuffer(gl.ARRAY_BUFFER, o.vertexBuffer);
|
||||
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(f), gl.STATIC_DRAW);
|
||||
gl.vertexAttribPointer(
|
||||
positionAttribLocation, // which attribute is read
|
||||
2, // number of values to read
|
||||
gl.FLOAT, // type of values
|
||||
gl.FALSE, // whether to normalize
|
||||
5 * Float32Array.BYTES_PER_ELEMENT, // size of individual vertex / distance between values to read
|
||||
0 // offset where to start reading
|
||||
);
|
||||
|
||||
// enable attribute
|
||||
gl.enableVertexAttribArray(positionAttribLocation);
|
||||
|
||||
let colorAttribLocation = gl.getAttribLocation(program, "vertColor");
|
||||
gl.vertexAttribPointer(
|
||||
colorAttribLocation,
|
||||
3,
|
||||
gl.FLOAT,
|
||||
gl.FALSE,
|
||||
5 * Float32Array.BYTES_PER_ELEMENT,
|
||||
2 * Float32Array.BYTES_PER_ELEMENT
|
||||
);
|
||||
gl.enableVertexAttribArray(colorAttribLocation);
|
||||
|
||||
// unbind buffer
|
||||
gl.bindBuffer(gl.ARRAY_BUFFER, null);
|
||||
|
||||
|
||||
// set clear colour
|
||||
gl.clearColor(...hexToRgb("181825"), 1.0);
|
||||
|
||||
gl.enable(gl.DEPTH_TEST);
|
||||
gl.enable(gl.BLEND);
|
||||
gl.enable(gl.CULL_FACE);
|
||||
gl.frontFace(gl.CCW);
|
||||
gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
|
||||
gl.clearColor(0.1, 0.1, 0.1, 1.0);
|
||||
|
||||
// start drawing
|
||||
requestAnimationFrame(draw);
|
||||
}
|
||||
|
||||
function setAttribPointers() {
|
||||
let positionAttribLocation = gl.getAttribLocation(program, "vertPosition");
|
||||
let normalAttribLocation = gl.getAttribLocation(program, "vertNormal");
|
||||
let textureAttribLocation = gl.getAttribLocation(program, "vertTexture");
|
||||
|
||||
gl.vertexAttribPointer(positionAttribLocation, 3, gl.FLOAT, gl.FALSE, 8 * Float32Array.BYTES_PER_ELEMENT, 0);
|
||||
gl.vertexAttribPointer(textureAttribLocation, 2, gl.FLOAT, gl.FALSE, 8 * Float32Array.BYTES_PER_ELEMENT, 3 * Float32Array.BYTES_PER_ELEMENT);
|
||||
gl.vertexAttribPointer(normalAttribLocation, 3, gl.FLOAT, gl.FALSE, 8 * Float32Array.BYTES_PER_ELEMENT, 5 * Float32Array.BYTES_PER_ELEMENT);
|
||||
|
||||
gl.enableVertexAttribArray(positionAttribLocation);
|
||||
gl.enableVertexAttribArray(textureAttribLocation);
|
||||
gl.enableVertexAttribArray(normalAttribLocation);
|
||||
}
|
||||
|
||||
let frameCount = 0;
|
||||
let lastStatUpdate = Date.now();
|
||||
|
||||
function updateStats(deltaTime) {
|
||||
frameCount++;
|
||||
|
||||
let now = Date.now();
|
||||
let timeSinceLastUpdate = (now - lastStatUpdate) / 1000;
|
||||
|
||||
if (timeSinceLastUpdate < 0.5) return;
|
||||
|
||||
lastStatUpdate = now;
|
||||
|
||||
let fpsDisplay = document.getElementById("fps");
|
||||
fpsDisplay.innerText = Math.round(frameCount / timeSinceLastUpdate)
|
||||
|
||||
let msDisplay = document.getElementById("ms");
|
||||
if (frameTimes.length > 0) {
|
||||
msDisplay.innerText = (Math.round(frameTimes.reduce((prev, curr) => prev + curr) / frameTimes.length * 100) / 100) + "ms";
|
||||
}
|
||||
|
||||
frameTimes = [];
|
||||
frameCount = 0;
|
||||
}
|
||||
|
||||
let hue = 0;
|
||||
|
||||
async function draw() {
|
||||
let now = Date.now();
|
||||
let deltaTime = (now - lastFrame) / 1000;
|
||||
let frameStart = performance.now();
|
||||
|
||||
hue += deltaTime / 5;
|
||||
if (hue > 1) hue = 0;
|
||||
|
||||
smoothCameraDistance += (cameraDistance - smoothCameraDistance) / 8;
|
||||
|
||||
updateStats(deltaTime);
|
||||
|
||||
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
|
||||
|
||||
let identity = [];
|
||||
mat4Identity(identity);
|
||||
|
||||
// Real Matrices
|
||||
let projectionMatrix = [];
|
||||
mat4BuildPerspective(projectionMatrix, 90.0 / 180.0 * Math.PI, cv.width / cv.height, 0.1, 30);
|
||||
|
||||
let viewMatrix = [];
|
||||
let cameraPosition = [Math.cos(cameraYaw) * smoothCameraDistance * Math.cos(cameraPitch), Math.sin(cameraPitch) * smoothCameraDistance, Math.sin(cameraYaw) * smoothCameraDistance * Math.cos(cameraPitch)];
|
||||
let cameraLookAt = [0, 0, 0];
|
||||
let cameraUp = [0, 1, 0];
|
||||
mat4BuildLookAt(viewMatrix, cameraPosition, cameraLookAt, cameraUp);
|
||||
|
||||
let normalMatrix = [];
|
||||
mat3MakeNormal(normalMatrix, viewMatrix);
|
||||
gl.clear(gl.COLOR_BUFFER_BIT);
|
||||
|
||||
gl.useProgram(program);
|
||||
gl.uniformMatrix4fv(gl.getUniformLocation(program, "projectionMatrix"), gl.FALSE, new Float32Array(projectionMatrix));
|
||||
gl.uniformMatrix4fv(gl.getUniformLocation(program, "modelViewMatrix"), gl.FALSE, new Float32Array(viewMatrix));
|
||||
gl.uniformMatrix3fv(gl.getUniformLocation(program, "normalMatrix"), gl.FALSE, new Float32Array(normalMatrix));
|
||||
|
||||
let lightPosition = [Math.cos(hue * Math.PI * 2) * 3, 2.0, Math.sin(hue * Math.PI * 2) * 3, 1.0];
|
||||
mat4vec4Multiply(lightPosition, viewMatrix, lightPosition);
|
||||
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
|
||||
|
||||
gl.uniform3f(gl.getUniformLocation(program, "Light.position"), ...lightPosition.slice(0, 3));
|
||||
gl.uniform3f(gl.getUniformLocation(program, "Light.color"), 1, 1, 1);
|
||||
gl.drawArrays(gl.TRIANGLES, 0, 3);
|
||||
|
||||
gl.uniform3f(gl.getUniformLocation(program, "Material.ambientColor"), 0.1, 0.1, 0.1);
|
||||
gl.uniform3f(gl.getUniformLocation(program, "Material.emitColor"), 0.05, 0.05, 0.0);
|
||||
gl.uniform3f(gl.getUniformLocation(program, "Material.diffColor"), 0.7, 0.8, 0.1);
|
||||
gl.uniform3f(gl.getUniformLocation(program, "Material.specColor"), 1, 1, 0.8);
|
||||
gl.uniform1f(gl.getUniformLocation(program, "Material.shininess"), 10);
|
||||
|
||||
gl.bindBuffer(gl.ARRAY_BUFFER, o.vertexBuffer);
|
||||
setAttribPointers();
|
||||
gl.drawArrays(gl.TRIANGLES, 0, o.numVertices);
|
||||
|
||||
frameTimes.push(performance.now() - frameStart);
|
||||
lastFrame = now;
|
||||
requestAnimationFrame(draw);
|
||||
}
|
||||
|
||||
function hexToRgb(hex) {
|
||||
let r = parseInt(hex.substring(0, 2), 16) / 255;
|
||||
let g = parseInt(hex.substring(2, 4), 16) / 255;
|
||||
let b = parseInt(hex.substring(4, 6), 16) / 255;
|
||||
|
||||
return [r, g, b];
|
||||
}
|
||||
|
||||
function hslToRgb(h, s, l) {
|
||||
let r, g, b;
|
||||
|
||||
if (s == 0) {
|
||||
r = g = b = l;
|
||||
} else {
|
||||
let hue2rgb = function hue2rgb(p, q, t) {
|
||||
if (t < 0) t += 1;
|
||||
if (t > 1) t -= 1;
|
||||
if (t < 1 / 6) return p + (q - p) * 6 * t;
|
||||
if (t < 1 / 2) return q;
|
||||
if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
|
||||
return p;
|
||||
}
|
||||
|
||||
let q = l < 0.5 ? l * (1 + s) : l + s - l * s;
|
||||
let p = 2 * l - q;
|
||||
|
||||
r = hue2rgb(p, q, h + 1 / 3);
|
||||
g = hue2rgb(p, q, h);
|
||||
b = hue2rgb(p, q, h - 1 / 3);
|
||||
}
|
||||
|
||||
return [r, g, b];
|
||||
}
|
||||
|
||||
window.addEventListener("DOMContentLoaded", init);
|
||||
|
|
@ -46,9 +46,3 @@ function linkShaderProgram(gl, vertexShader, fragmentShader) {
|
|||
|
||||
return program;
|
||||
}
|
||||
|
||||
async function buildShaderProgram(gl, vertexPath, fragmentPath) {
|
||||
let vertexShader = await fetchAndCompileShader(gl, gl.VERTEX_SHADER, vertexPath);
|
||||
let fragmentShader = await fetchAndCompileShader(gl, gl.FRAGMENT_SHADER, fragmentPath);
|
||||
return linkShaderProgram(gl, vertexShader, fragmentShader);
|
||||
}
|
||||
|
|
@ -1,33 +1,6 @@
|
|||
precision mediump float;
|
||||
|
||||
uniform struct {
|
||||
vec3 position;
|
||||
vec3 color;
|
||||
} Light;
|
||||
|
||||
uniform struct {
|
||||
vec3 ambientColor;
|
||||
vec3 emitColor;
|
||||
vec3 diffColor;
|
||||
vec3 specColor;
|
||||
float shininess;
|
||||
} Material;
|
||||
|
||||
varying vec3 vNormal;
|
||||
varying vec2 vTexture;
|
||||
varying vec3 vPosition;
|
||||
varying vec3 fragColor;
|
||||
|
||||
void main() {
|
||||
vec3 pleaseDontDeleteMe = vec3(vTexture, 0.0);
|
||||
|
||||
vec3 eyeDir = normalize(-vPosition);
|
||||
vec3 lightDir = normalize(Light.position - vPosition);
|
||||
vec3 r = reflect(-lightDir, vNormal);
|
||||
|
||||
vec3 ambient = Material.ambientColor;
|
||||
vec3 emit = Material.emitColor;
|
||||
vec3 diff = max(dot(lightDir, vNormal), 0.0) * Material.diffColor * Light.color;
|
||||
vec3 spec = pow(max(dot(r, eyeDir), 0.0), Material.shininess) * Material.specColor * Light.color;
|
||||
|
||||
gl_FragColor = vec4(ambient + emit + diff + spec, 1);
|
||||
gl_FragColor = vec4(fragColor, 1.0);
|
||||
}
|
||||
|
|
@ -1,21 +1,10 @@
|
|||
precision mediump float;
|
||||
|
||||
attribute vec3 vertPosition;
|
||||
attribute vec3 vertNormal;
|
||||
attribute vec2 vertTexture;
|
||||
|
||||
uniform mat4 modelViewMatrix;
|
||||
uniform mat4 projectionMatrix;
|
||||
uniform mat3 normalMatrix;
|
||||
|
||||
varying vec3 vNormal;
|
||||
varying vec2 vTexture;
|
||||
varying vec3 vPosition;
|
||||
attribute vec2 vertPosition;
|
||||
attribute vec3 vertColor;
|
||||
varying vec3 fragColor;
|
||||
|
||||
void main() {
|
||||
vNormal = normalize(normalMatrix * vertNormal);
|
||||
vTexture = vertTexture;
|
||||
vPosition = (modelViewMatrix * vec4(vertPosition, 1.0)).xyz;
|
||||
|
||||
gl_Position = projectionMatrix * modelViewMatrix * vec4(vertPosition, 1.0);
|
||||
fragColor = vertColor;
|
||||
gl_Position = vec4(vertPosition, 0.0, 1.0);
|
||||
}
|
||||
|
|
@ -1,43 +0,0 @@
|
|||
async function readObjFile(path) {
|
||||
const res = await fetch(path);
|
||||
const text = await res.text();
|
||||
|
||||
let vertices = [];
|
||||
let textures = [];
|
||||
let normals = [];
|
||||
|
||||
let result = [];
|
||||
|
||||
const lines = text.replace("\r","").split("\n");
|
||||
|
||||
for (let line of lines) {
|
||||
const parts = line.split(/\s+/);
|
||||
|
||||
switch (parts[0]) {
|
||||
case "v":
|
||||
vertices.push(parts.slice(1, 4).map(parseFloat));
|
||||
break;
|
||||
case "vt":
|
||||
textures.push(parts.slice(1, 3).map(parseFloat));
|
||||
break;
|
||||
case "vn":
|
||||
normals.push(parts.slice(1, 4).map(parseFloat));
|
||||
break;
|
||||
case "f":
|
||||
for (const part of parts.slice(1, 4)) {
|
||||
const [v, vt, vn] = part.split("/").map((i) => parseInt(i) - 1);
|
||||
result.push(...vertices[v], ...textures[vt], ...normals[vn]);
|
||||
}
|
||||
|
||||
// support for quads:
|
||||
if (parts.length > 4) {
|
||||
for (let i of [1, 3, 4]) {
|
||||
const part = parts[i];
|
||||
const [v, vt, vn] = part.split("/").map((i) => parseInt(i) - 1);
|
||||
result.push(...vertices[v], ...textures[vt], ...normals[vn]);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
Loading…
Reference in New Issue