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Add landing physics

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This commit is contained in:
asraelite 2018-03-04 12:50:52 +00:00
parent 9435e887a4
commit d85338d9f2
6 changed files with 38 additions and 18 deletions
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15
js/world/body.mjs
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@ -37,9 +37,9 @@ export default class Body {
return [nx - cx, ny - cy];
}
rotateVector(x, y, r) {
return [(x * Math.cos(this.r) - y * Math.sin(this.r)),
(y * Math.cos(this.r) - x * Math.sin(this.r))];
rotateVector(x, y, r = this.r) {
return [(x * Math.cos(r) - y * Math.sin(r)),
(y * Math.cos(r) - x * Math.sin(r))];
}
relativeVector(x, y) {
@ -65,9 +65,12 @@ export default class Body {
distanceTo(body) {
let [[ax, ay], [bx, by]] = [this.com, body.com];
let result = Math.max(Math.sqrt(((bx - ax) ** 2) +
return Math.max(Math.sqrt(((bx - ax) ** 2) +
((by - ay) ** 2)), 1);
return result;
}
angleTo(ax, ay, bx, by) {
return Math.atan2(by - ay, bx - ax);
}
approach(body, distance) {
@ -83,7 +86,7 @@ export default class Body {
}
applyDirectionalForce(x, y, r) {
let [vx, vy] = this.rotateVector(x, y, r);
let [vx, vy] = this.rotateVector(x, y);
this.xvel += vx;
this.yvel += vy;
this.rvel += r / this.mass;

2
js/world/particle.mjs
View file

@ -10,7 +10,7 @@ export function createThrustExhaust(thruster) {
xvel: ship.xvel + fx,
yvel: ship.yvel + fy,
color: '#f4c542',
lifetime: 10,
lifetime: 5,
size: 0.07
}));
}

15
js/world/ship.mjs
View file

@ -66,12 +66,25 @@ export default class Ship extends Body {
})
}
resolveCelestialCollision(pos, cel) {
//debugger;
let theta = this.angleTo(...this.com, ...cel.com);
let angleToCom = this.angleTo(...this.com, ...pos);
let angle = angleToCom - theta;
let [force] = this.rotateVector(0, 1, angle);
if (Math.abs(angle) < 0.3) {
force *= -1;
}
this.rvel -= force * 0.015;
}
checkModuleCollision(module, body) {
let p = this.getWorldPoint(...module.localCom)
let p = this.getWorldPoint(...module.localCom);
let dis = body.distanceTo({ com: p });
if (dis < body.radius + 0.5) {
this.approach(body, dis - (body.radius + 0.5));
this.halt();
this.resolveCelestialCollision(p, body);
}
}