trainsim/track/shapes.ts

85 lines
1.9 KiB
TypeScript

import { Vector } from "@bearmetal/doodler";
import { TrackSegment } from "./system.ts";
export class StraightTrack extends TrackSegment {
constructor(start?: Vector) {
start = start || new Vector(100, 100);
super([
start,
start.copy().add(25, 0),
start.copy().add(75, 0),
start.copy().add(100, 0),
]);
}
}
export class SBendLeft extends StraightTrack {
constructor(start?: Vector) {
start = start || new Vector(100, 100);
super(start);
this.points[2].add(0, -25);
this.points[3].add(0, -25);
}
}
export class SBendRight extends StraightTrack {
constructor(start?: Vector) {
start = start || new Vector(100, 100);
super(start);
this.points[2].add(0, 25);
this.points[3].add(0, 25);
}
}
export class BankLeft extends TrackSegment {
constructor(start?: Vector) {
start = start || new Vector(100, 100);
const p1 = start.copy();
const p2 = start.copy();
const p3 = start.copy();
const p4 = start.copy();
const scale = 33;
p2.add(new Vector(1, 0).mult(scale));
p3.set(p2);
const dirToP3 = Vector.fromAngle(-Math.PI / 12).mult(scale);
p3.add(dirToP3);
p4.set(p3);
const dirToP4 = Vector.fromAngle(-Math.PI / 6).mult(scale);
p4.add(dirToP4);
super([
p1,
p2,
p3,
p4,
]);
}
}
export class BankRight extends TrackSegment {
constructor(start?: Vector) {
start = start || new Vector(100, 100);
const p1 = start.copy();
const p2 = start.copy();
const p3 = start.copy();
const p4 = start.copy();
const scale = 33;
p2.add(new Vector(1, 0).mult(scale));
p3.set(p2);
const dirToP3 = Vector.fromAngle(Math.PI / 12).mult(scale);
p3.add(dirToP3);
p4.set(p3);
const dirToP4 = Vector.fromAngle(Math.PI / 6).mult(scale);
p4.add(dirToP4);
super([
p1,
p2,
p3,
p4,
]);
}
}