23 lines
1.1 KiB
TypeScript
23 lines
1.1 KiB
TypeScript
module es {
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export class Tire extends Composite {
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constructor(origin: Vector2, radius: number, segments: number, spokeStiffness: number = 1, treadStiffness: number = 1) {
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super();
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const stride = 2 * Math.PI / segments;
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for (let i = 0; i < segments; i ++) {
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const theta = i * stride;
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this.addParticle(new Particle(new Vector2(origin.x + Math.cos(theta) * radius,
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origin.y + Math.sin(theta) * radius)));
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}
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const centerParticle = this.addParticle(new Particle(origin));
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for (let i = 0; i < segments; i ++) {
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this.addConstraint(new DistanceConstraint(this.particles[i], this.particles[(i + 1) % segments], treadStiffness));
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this.addConstraint(new DistanceConstraint(this.particles[i], centerParticle, spokeStiffness))
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.setCollidesWithColliders(false);
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this.addConstraint(new DistanceConstraint(this.particles[i], this.particles[(i + 5) % segments], treadStiffness));
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}
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}
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}
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} |