65 lines
1.8 KiB
TypeScript
65 lines
1.8 KiB
TypeScript
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import type {Testbed} from "../Testbed";
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type RAPIER_API = typeof import("@dimforge/rapier2d");
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export function initWorld(RAPIER: RAPIER_API, testbed: Testbed) {
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let gravity = new RAPIER.Vector2(0.0, -9.81);
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let world = new RAPIER.World(gravity);
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let i, j;
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/*
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* Ground
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*/
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let nsubdivs = 100;
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let points = [];
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let groundSize = 30.0;
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let stepSize = groundSize / nsubdivs;
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points.push(-groundSize / 2.0, 25.0);
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for (i = 1; i < nsubdivs; ++i) {
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let x = -groundSize / 2.0 + i * stepSize;
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let y = Math.cos(i * stepSize) * 2.0;
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points.push(x, y);
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}
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points.push(groundSize / 2.0, 25.0);
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let bodyDesc = RAPIER.RigidBodyDesc.fixed();
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let body = world.createRigidBody(bodyDesc);
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let colliderDesc = RAPIER.ColliderDesc.polyline(new Float32Array(points));
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world.createCollider(colliderDesc, body);
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/*
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* Create the cubes
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*/
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let num = 10;
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let rad = 0.5;
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let shift = rad * 2.0;
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let centerx = shift * (num / 2);
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let centery = shift / 2.0;
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for (i = 0; i < num; ++i) {
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for (j = 0; j < num * 5; ++j) {
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let x = i * shift - centerx;
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let y = j * shift + centery + 3.0;
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// Build the rigid body.
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let bodyDesc = RAPIER.RigidBodyDesc.dynamic().setTranslation(x, y);
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let body = world.createRigidBody(bodyDesc);
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if (j % 2 == 0) {
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let colliderDesc = RAPIER.ColliderDesc.cuboid(rad, rad);
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world.createCollider(colliderDesc, body);
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} else {
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let colliderDesc = RAPIER.ColliderDesc.ball(rad);
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world.createCollider(colliderDesc, body);
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}
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}
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}
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testbed.setWorld(world);
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testbed.lookAt({
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target: {x: -10.0, y: -15.0},
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zoom: 10.0,
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});
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}
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