50 lines
1.7 KiB
TypeScript
50 lines
1.7 KiB
TypeScript
module TK.SpaceTac {
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// An hyperspace link between two star systems
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export class StarLink {
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// Stars
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first: Star;
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second: Star;
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constructor(first: Star, second: Star) {
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this.first = first;
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this.second = second;
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}
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// Check if this links bounds the two stars together, in either way
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isLinking(first: Star, second: Star) {
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return (this.first === first && this.second === second) || (this.first === second && this.second === first);
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}
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// Get the length of a link
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getLength(): number {
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return this.first.getDistanceTo(this.second);
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}
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// Check if this link crosses another
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isCrossing(other: StarLink): boolean {
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if (this.first === other.first || this.second === other.first || this.first === other.second || this.second === other.second) {
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return false;
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}
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var ccw = (a: Star, b: Star, c: Star): boolean => {
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return (c.y - a.y) * (b.x - a.x) > (b.y - a.y) * (c.x - a.x);
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};
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var cc1 = ccw(this.first, other.first, other.second);
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var cc2 = ccw(this.second, other.first, other.second);
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var cc3 = ccw(this.first, this.second, other.first);
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var cc4 = ccw(this.first, this.second, other.second);
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return cc1 !== cc2 && cc3 !== cc4;
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}
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// Get the other side of the link, for a given side
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getPeer(star: Star): Star | null {
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if (star === this.first) {
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return this.second;
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} else if (star === this.second) {
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return this.first;
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} else {
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return null;
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}
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}
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}
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}
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