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import { Matrix4 } from "./Matrix4";
class Vector4 {
public readonly x: number;
public readonly y: number;
public readonly z: number;
public readonly w: number;
constructor(x: number = 0, y: number = 0, z: number = 0, w: number = 0) {
this.x = x;
this.y = y;
this.z = z;
this.w = w;
}
equals(v: Vector4): boolean {
if (this.x !== v.x) {
return false;
}
if (this.y !== v.y) {
return false;
}
if (this.z !== v.z) {
return false;
}
if (this.w !== v.w) {
return false;
}
return true;
}
add(v: number): Vector4;
add(v: Vector4): Vector4;
add(v: number | Vector4): Vector4 {
if (typeof v === "number") {
return new Vector4(this.x + v, this.y + v, this.z + v, this.w + v);
} else {
return new Vector4(this.x + v.x, this.y + v.y, this.z + v.z, this.w + v.w);
}
}
subtract(v: number): Vector4;
subtract(v: Vector4): Vector4;
subtract(v: number | Vector4): Vector4 {
if (typeof v === "number") {
return new Vector4(this.x - v, this.y - v, this.z - v, this.w - v);
} else {
return new Vector4(this.x - v.x, this.y - v.y, this.z - v.z, this.w - v.w);
}
}
multiply(v: number): Vector4;
multiply(v: Vector4): Vector4;
multiply(v: Matrix4): Vector4;
multiply(v: number | Vector4 | Matrix4): Vector4 {
if (typeof v === "number") {
return new Vector4(this.x * v, this.y * v, this.z * v, this.w * v);
} else if (v instanceof Vector4) {
return new Vector4(this.x * v.x, this.y * v.y, this.z * v.z, this.w * v.w);
} else {
return new Vector4(
this.x * v.buffer[0] + this.y * v.buffer[4] + this.z * v.buffer[8] + this.w * v.buffer[12],
this.x * v.buffer[1] + this.y * v.buffer[5] + this.z * v.buffer[9] + this.w * v.buffer[13],
this.x * v.buffer[2] + this.y * v.buffer[6] + this.z * v.buffer[10] + this.w * v.buffer[14],
this.x * v.buffer[3] + this.y * v.buffer[7] + this.z * v.buffer[11] + this.w * v.buffer[15],
);
}
}
dot(v: Vector4): number {
return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;
}
lerp(v: Vector4, t: number): Vector4 {
return new Vector4(
this.x + (v.x - this.x) * t,
this.y + (v.y - this.y) * t,
this.z + (v.z - this.z) * t,
this.w + (v.w - this.w) * t,
);
}
magnitude(): number {
return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w);
}
distanceTo(v: Vector4): number {
return Math.sqrt((this.x - v.x) ** 2 + (this.y - v.y) ** 2 + (this.z - v.z) ** 2 + (this.w - v.w) ** 2);
}
normalize(): Vector4 {
const length = this.magnitude();
return new Vector4(this.x / length, this.y / length, this.z / length, this.w / length);
}
flat(): number[] {
return [this.x, this.y, this.z, this.w];
}
clone(): Vector4 {
return new Vector4(this.x, this.y, this.z, this.w);
}
toString(): string {
return `[${this.flat().join(", ")}]`;
}
}
export { Vector4 };
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