rc-js-util/src/array/typed-array/mat4/mat4-factory.ts

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

import { ITypedArrayTupleFactory } from "../i-typed-array-tuple-factory.js";
import { IMat4Ctor, Mat4, TMat4CtorArgs } from "./mat4.js";
import { ATypedTupleFactory } from "../a-typed-tuple-factory.js";
import { TTypedArray } from "../t-typed-array.js";
import { INormalizedDataView } from "../normalized-data-view/i-normalized-data-view.js";

export class Mat4Factory<T extends Mat4<TTypedArray>>
    extends ATypedTupleFactory<T, TMat4CtorArgs>
    implements ITypedArrayTupleFactory<T, TMat4CtorArgs>
{
    public constructor
    (
        private ctor: IMat4Ctor<TTypedArray>,
        dataView: INormalizedDataView,
    )
    {
        super(16, ctor.BYTES_PER_ELEMENT, dataView);
    }

    public createOneEmpty(): T
    {
        return new this.ctor() as T;
    }

    public createOne
    (
        c1r1: number,
        c2r1: number,
        c3r1: number,
        c4r1: number,
        c1r2: number,
        c2r2: number,
        c3r2: number,
        c4r2: number,
        c1r3: number,
        c2r3: number,
        c3r3: number,
        c4r3: number,
        c1r4: number,
        c2r4: number,
        c3r4: number,
        c4r4: number,
    )
        : T
    {
        const a = this.createOneEmpty();
        a[0] = c1r1;
        a[1] = c2r1;
        a[2] = c3r1;
        a[3] = c4r1;
        a[4] = c1r2;
        a[5] = c2r2;
        a[6] = c3r2;
        a[7] = c4r2;
        a[8] = c1r3;
        a[9] = c2r3;
        a[10] = c3r3;
        a[11] = c4r3;
        a[12] = c1r4;
        a[13] = c2r4;
        a[14] = c3r4;
        a[15] = c4r4;

        return a;
    }
}