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/// <reference path="../scripts/jquery-3.5.1.min.js"/>
/// <reference path="vec2.js" />
/// <reference path="mat4.js" />
/// <reference path="shader.js" />
/// <reference path="circle.js" />
function main() {
// Define Constants
const CIRCLE_RADIUS = 16;
const GRAVITY = 9.8;
// Retrieve context
const lProgramContext = getContext('#rigidbody_2');
if (lProgramContext.gl === null) {
console.error('Unable to initialize WebGL. Your browser or machine may not support it.');
return;
}
lProgramContext.gl.clearColor(0.0, 0.0, 0.0, 1.0);
lProgramContext.gl.clear(lProgramContext.gl.COLOR_BUFFER_BIT);
function run() {
console.log('Running Rigid Body 2');
lProgramContext.load().then(function(pProgramInfo) {
const lCircle = circle(lProgramContext.gl, CIRCLE_RADIUS, 30, [
{ x: 1, y: 1, z: 0, w: 1 },
{ x: 1, y: 0, z: 1, w: 1 },
{ x: 0, y: 1, z: 1, w: 1 },
{ x: 0, y: 1, z: 0, w: 1 }
], vec2(lProgramContext.width / 2.0, lProgramContext.height / 2.0));
function update(pDeltaTimeSeconds) {
// Same physics updates from previously
const lGravityForce = vec2(0, -1.0 * (lCircle.mass * GRAVITY));
lCircle.force = addVec2(lCircle.force, lGravityForce);
const lCurrentAcceleration = scaleVec2(lCircle.force, 1.0 / lCircle.mass);
lCircle.velocity = addVec2(lCircle.velocity, scaleVec2(lCurrentAcceleration, pDeltaTimeSeconds));
lCircle.position = addVec2(lCircle.position, scaleVec2(lCircle.velocity, pDeltaTimeSeconds));
lCircle.rotationRadians += Math.PI * pDeltaTimeSeconds;
lCircle.model = rotateMatrix2d(translateMatrix(mat4(), lCircle.position.x, lCircle.position.y, 0), lCircle.rotationRadians);
lCircle.force = vec2();
// Render Code only
lProgramContext.gl.clearColor(0.0, 0.0, 0.0, 1.0);
lProgramContext.gl.clearDepth(1.0);
lProgramContext.gl.enable(lProgramContext.gl.DEPTH_TEST);
lProgramContext.gl.depthFunc(lProgramContext.gl.LEQUAL);
lProgramContext.gl.clear(lProgramContext.gl.COLOR_BUFFER_BIT | lProgramContext.gl.DEPTH_BUFFER_BIT);
lProgramContext.gl.useProgram(pProgramInfo.program);
lProgramContext.gl.uniformMatrix4fv(pProgramInfo.uniformLocations.projection, false, lProgramContext.perspective);
lProgramContext.gl.uniformMatrix4fv(pProgramInfo.uniformLocations.model, false, lCircle.model);
renderCircle(lProgramContext.gl, pProgramInfo, lCircle);
}
function cleanup() {
lProgramContext.gl.deleteBuffer(lCircle.buffer);
lProgramContext.gl.deleteProgram(pProgramInfo.program);
lProgramContext.gl.clearColor(0.0, 0.0, 0.0, 1.0);
lProgramContext.gl.clear(lProgramContext.gl.COLOR_BUFFER_BIT);
}
function reset() {
lExitRequestFunc();
lProgramContext.reset();
}
const lExitRequestFunc = requestUpdateLoop(update, cleanup);
lProgramContext.stopButton.on('click', reset);
});
}
lProgramContext.playButton.on('click', run);
}
$(document).ready(main);
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