339 lines
9.6 KiB
TypeScript
339 lines
9.6 KiB
TypeScript
// @ts-ignore
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import {convert} from './objparser';
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import $ from 'jquery';
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import vsSource from './shaders/shader.vert';
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import fsSource from './shaders/blackandwhite.frag';
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import fsSource2 from './shaders/colored.frag';
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import fsSource3 from './shaders/grey.frag';
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import fsSource4 from './shaders/texture.frag';
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import fsSource5 from './shaders/sobel.frag';
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import {initBuffers, deleteBuffers} from './buffers';
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import {initShaderProgram} from './shaders';
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import {changeFragmentShader} from './changeshader';
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import {loadTexture} from './texture';
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import {initMatrices} from './matrix';
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import {initVertexAttribs} from './vertexattrib';
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main();
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/**
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* The program purpose is encapsulated in a main function
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*/
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async function main() {
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const canvas: any = document.querySelector('#glCanvas')!;
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const gl = canvas.getContext('webgl');
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if (gl == null) {
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canvas.parentNode.removeChild(canvas);
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document.getElementById('root')!.insertAdjacentHTML('beforeend',
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`<p>Unable to initialize WebGL. Your browser or machine may not
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support it.</p>`);
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}
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/**
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* Fetch an obj file
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* @param {string} url the url to fetch the object from
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* @return {string} the raw data of the obj file
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*/
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async function getObj(url: string) {
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const response = await fetch(url);
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const data = await response.text();
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return data;
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}
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const data = await getObj('/static/objs/racer.obj');
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const distance: any = $('#distance').val();
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const distanceFine: any = $('#distancefine').val();
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const instanceNumber: any = $('#instance').val();
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const params: any = {
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distance: parseFloat(distance) + parseFloat(distanceFine),
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circleSize: $('#circlesize').val(),
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fov: $('#fov').val(),
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avg: {
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x: 0,
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y: 0,
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z: 0,
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},
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range: 0,
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rot: {
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x: $('#rotx').val(),
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y: $('#roty').val(),
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z: $('#rotz').val(),
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},
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rotSpeed: $('#rotspeed').val(),
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instanceNumber: parseInt(instanceNumber),
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squareRotation: 0,
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};
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let length: number = 0;
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let buffers: any;
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updateObj(data, true);
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let [shaderProgram, fragmentShader]: any = initShaderProgram(gl,
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vsSource,
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fsSource4);
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let programInfo: any = {
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program: shaderProgram,
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attribLocations: {
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vertexPosition: gl.getAttribLocation(shaderProgram,
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'aVertexPosition'),
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vertexNormal: gl.getAttribLocation(shaderProgram,
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'aVertexNormal'),
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textureCoord: gl.getAttribLocation(shaderProgram,
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'aTextureCoord'),
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},
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uniformLocations: {
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projectionMatrix: gl.getUniformLocation(
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shaderProgram, 'uProjectionMatrix'),
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viewMatrix: gl.getUniformLocation(
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shaderProgram, 'uviewMatrix'),
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modelMatrix: gl.getUniformLocation(
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shaderProgram, 'umodelMatrix'),
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normalModelMatrix: gl.getUniformLocation(
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shaderProgram, 'unormalModelMatrix'),
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uSampler: gl.getUniformLocation(
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shaderProgram, 'uSampler'),
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},
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};
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let texture = loadTexture(gl, '/static/textures/racer.png');
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let then = 0;
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let changed = false;
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/**
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* Draws the scene repeatedly
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* @param {number} now the current time
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*/
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function render(now: any) {
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now *= 0.001;
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const deltaTime = now - then;
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params.squareRotation += deltaTime;
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if (now >= 1 && changed == false) {
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changed = true;
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}
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then = now;
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drawScene(gl,
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programInfo,
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buffers,
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length,
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params,
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texture);
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requestAnimationFrame(render);
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}
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/**
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* Pushes a new obj file to the gl buffer
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* @param {string} data the obj file to push
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* @param {boolean} firstCall is it first object updated ?
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*/
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function updateObj(data: string, firstCall: boolean = false) {
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const [
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positions,
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normals,
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uvs,
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indices,
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] = convert(data);
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length = indices.length;
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let x = 0;
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let y = 0;
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let z = 0;
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let maxx = positions[0];
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let maxy = positions[1];
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let maxz = positions[2];
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let minx = positions[0];
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let miny = positions[1];
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let minz = positions[2];
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for (let i = 0; i < positions.length; i++) {
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if (i % 3 == 0) {
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if (positions[i] > maxx) {
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maxx = positions[i];
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} else if (positions[i] < minx) {
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minx = positions[i];
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}
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x += positions[i];
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} else if (i % 3 == 1) {
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if (positions[i] > maxy) {
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maxy = positions[i];
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} else if (positions[i] < miny) {
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miny = positions[i];
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}
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y += positions[i];
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} else {
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if (positions[i] > maxz) {
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maxz = positions[i];
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} else if (positions[i] < minz) {
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minz = positions[i];
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}
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z += positions[i];
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}
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}
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params.range = Math.max(maxx - minx, maxy - miny, maxz - minz);
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params.avg.x = x / (positions.length / 3);
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params.avg.y = y / (positions.length / 3);
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params.avg.z = z / (positions.length / 3);
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if (!firstCall) {
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deleteBuffers(gl, buffers);
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}
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buffers = initBuffers(gl, positions, indices, normals, uvs);
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}
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$(function() {
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$('#distance').on('input', function() {
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const distance: any = $('#distance').val();
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const distanceFine: any = $('#distancefine').val();
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params.distance = parseFloat(distance) + parseFloat(distanceFine);
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});
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$('#distancefine').on('input', function() {
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const distance: any = $('#distance').val();
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const distanceFine: any = $('#distancefine').val();
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params.distance = parseFloat(distance) + parseFloat(distanceFine);
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});
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$('#circlesize').on('input', function() {
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const circleSize: any = $('#circlesize').val();
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params.circleSize = parseFloat(circleSize);
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});
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$('#instance').on('input', function() {
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const instance: any = $('#instance').val();
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params.instanceNumber = parseInt(instance);
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});
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$('#rotx').on('input', function() {
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const rotx: any = $('#rotx').val();
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params.rot.x = parseFloat(rotx);
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});
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$('#roty').on('input', function() {
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const roty: any = $('#roty').val();
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params.rot.y = parseFloat(roty);
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});
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$('#rotz').on('input', function() {
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const rotz: any = $('#rotz').val();
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params.rot.z = parseFloat(rotz);
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});
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$('#rotspeed').on('input', function() {
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const rotSpeed: any = $('#rotspeed').val();
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params.rotSpeed = parseFloat(rotSpeed);
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});
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$('#fov').on('input', function() {
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const fov: any = $('#fov').val();
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params.fov = parseFloat(fov);
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});
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$('#s_blackandwhite').on('click', function() {
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[programInfo, fragmentShader] = changeFragmentShader(gl,
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shaderProgram, fragmentShader, fsSource, vsSource);
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});
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$('#s_color').on('click', function() {
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[programInfo, fragmentShader] = changeFragmentShader(gl,
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shaderProgram, fragmentShader, fsSource2, vsSource);
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});
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$('#s_grey').on('click', function() {
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[programInfo, fragmentShader] = changeFragmentShader(gl,
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shaderProgram, fragmentShader, fsSource3, vsSource);
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});
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$('#s_texture').on('click', function() {
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[programInfo, fragmentShader] = changeFragmentShader(gl,
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shaderProgram, fragmentShader, fsSource4, vsSource);
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});
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$('#s_sobel').on('click', function() {
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[programInfo, fragmentShader] = changeFragmentShader(gl,
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shaderProgram, fragmentShader, fsSource5, vsSource);
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});
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$('#o_sphere').on('click', async function() {
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const data = await getObj('/static/objs/sphere.obj');
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updateObj(data);
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});
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$('#o_teapot').on('click', async function() {
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const data = await getObj('/static/objs/teapot.obj');
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updateObj(data);
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});
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$('#o_fox').on('click', async function() {
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const data = await getObj('/static/objs/fox.obj');
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updateObj(data);
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});
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$('#o_mecha').on('click', async function() {
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const data = await getObj('/static/objs/mecha.obj');
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updateObj(data);
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});
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$('#o_racer').on('click', async function() {
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const data = await getObj('/static/objs/racer.obj');
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updateObj(data);
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});
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$('#t_wall').on('click', async function() {
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texture = loadTexture(gl, '/static/textures/wall.png');
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});
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$('#t_ice').on('click', async function() {
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texture = loadTexture(gl, '/static/textures/ice.png');
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});
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$('#t_noise').on('click', async function() {
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texture = loadTexture(gl, '/static/textures/noise.png');
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});
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$('#t_fox').on('click', async function() {
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texture = loadTexture(gl, '/static/textures/fox.png');
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});
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$('#t_racer').on('click', async function() {
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texture = loadTexture(gl, '/static/textures/racer.png');
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});
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$('#t_racer_wireframe').on('click', async function() {
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texture = loadTexture(gl, '/static/textures/racer_wireframe.png');
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});
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});
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requestAnimationFrame(render);
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}
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/**
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* Draw a webgl scene
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* @param {any} gl the WebGL context
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* @param {any} programInfo WebGL program information
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* @param {any} buffers the buffers to draw
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* @param {number} length the index buffer length
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* @param {number} params various parameterss
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* @param {any} texture the texture to load
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*/
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function drawScene(gl: any,
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programInfo: any,
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buffers: any,
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length: number,
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params: any,
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texture: any) {
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gl.clearColor(0.0, 0.0, 0.0, 1.0);
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gl.clearDepth(1.0);
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gl.enable(gl.DEPTH_TEST);
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gl.depthFunc(gl.LEQUAL);
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gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
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initVertexAttribs(gl, programInfo, buffers);
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gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, buffers.indices);
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gl.useProgram(programInfo.program);
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gl.activeTexture(gl.TEXTURE0);
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gl.bindTexture(gl.TEXTURE_2D, texture);
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gl.uniform1i(programInfo.uniformLocations.uSampler, 0);
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const [
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projectionMatrix,
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viewMatrix,
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modelMatrix,
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normalModelMatrix,
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] = initMatrices(gl, params);
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for (let i = 0; i < params.instanceNumber; i++) {
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gl.uniformMatrix4fv(
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programInfo.uniformLocations.projectionMatrix,
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false,
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projectionMatrix);
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gl.uniformMatrix4fv(
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programInfo.uniformLocations.viewMatrix,
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false,
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viewMatrix);
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gl.uniformMatrix4fv(
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programInfo.uniformLocations.modelMatrix,
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false,
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modelMatrix[i]);
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gl.uniformMatrix4fv(
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programInfo.uniformLocations.normalModelMatrix,
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false,
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normalModelMatrix[i]);
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const vertexCount = length;
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const type = gl.UNSIGNED_SHORT;
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const offset = 0;
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gl.drawElements(gl.TRIANGLES, vertexCount, type, offset);
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}
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}
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