86 lines
1.4 KiB
JavaScript
86 lines
1.4 KiB
JavaScript
class Vector
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{
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constructor(x = 0, y = 0)
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{
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this.x = x;
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this.y = y;
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}
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add(vector)
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{
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this.x += vector.x;
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this.y += vector.y;
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return this;
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}
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addMul(vector, scalar)
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{
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this.x += vector.x * scalar;
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this.y += vector.y * scalar;
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return this;
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}
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sub(vector)
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{
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this.x -= vector.x;
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this.y -= vector.y;
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return this;
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}
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mul(scalar)
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{
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this.x *= scalar;
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this.y *= scalar;
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return this;
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}
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div(scalar)
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{
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return this.mul(1 / scalar);
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}
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rotate(angle)
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{
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const cos = Math.cos(angle);
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const sin = Math.sin(angle);
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const nextX = cos * this.x - sin * this.y;
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const nextY = cos * this.y + sin * this.x;
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this.x = nextX;
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this.y = nextY;
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return this;
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}
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angle()
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{
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return Math.PI / 2 - Math.atan2(this.x, this.y);
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}
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normSquared()
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{
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return this.x * this.x + this.y * this.y;
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}
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static distSquared(lhs, rhs)
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{
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return (
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(lhs.x - rhs.x) * (lhs.x - rhs.x)
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+ (lhs.y - rhs.y) * (lhs.y - rhs.y)
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);
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}
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reset()
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{
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this.x = 0;
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this.y = 0;
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return this;
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}
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clone()
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{
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return new Vector(this.x, this.y);
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}
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}
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export default Vector;
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