@spearwolf/twopoint5d/lib/texture/TextureCoords.js

Create 2.5D realtime graphics and pixelart with WebGL and three.js

const minCoord = (current, scalarKey, sizeKey) => {
    let texCoords = current;
    let scalar = 0;
    while (texCoords.parent != null) {
        scalar += texCoords[scalarKey];
        texCoords = texCoords.parent;
    }
    return scalar / texCoords[sizeKey];
};
const maxCoord = (current, scalarKey, sizeKey) => {
    let texCoords = current;
    let coord = current[sizeKey];
    while (texCoords.parent != null) {
        coord += texCoords[scalarKey];
        texCoords = texCoords.parent;
    }
    return coord / texCoords[sizeKey];
};
export class TextureCoords {
    static { this.FLIP_HORIZONTAL = 1; }
    static { this.FLIP_VERTICAL = 2; }
    static { this.FLIP_DIAGONAL = 4; }
    constructor(...args) {
        this.x = 0;
        this.y = 0;
        this.width = 0;
        this.height = 0;
        this.flip = 0;
        if (args[0] instanceof TextureCoords) {
            this.parent = args[0];
            this.x = args[1] ?? 0;
            this.y = args[2] ?? 0;
            this.width = args[3] ?? 0;
            this.height = args[4] ?? 0;
        }
        else if (args?.length) {
            this.x = args[0] ?? 0;
            this.y = args[1] ?? 0;
            this.width = args[2] ?? 0;
            this.height = args[3] ?? 0;
        }
    }
    clone() {
        const texCoords = new TextureCoords();
        texCoords.parent = this.parent;
        texCoords.x = this.x;
        texCoords.y = this.y;
        texCoords.width = this.width;
        texCoords.height = this.height;
        texCoords.flip = this.flip;
        return texCoords;
    }
    get root() {
        let root = this;
        while (root.parent) {
            root = root.parent;
        }
        return root;
    }
    get flipH() {
        return (this.flip & TextureCoords.FLIP_HORIZONTAL) > 0;
    }
    set flipH(flip) {
        this.flip =
            (flip ? TextureCoords.FLIP_HORIZONTAL : 0) | (this.flip & (TextureCoords.FLIP_VERTICAL | TextureCoords.FLIP_DIAGONAL));
    }
    get flipV() {
        return (this.flip & TextureCoords.FLIP_VERTICAL) > 0;
    }
    set flipV(flip) {
        this.flip =
            (flip ? TextureCoords.FLIP_VERTICAL : 0) | (this.flip & (TextureCoords.FLIP_HORIZONTAL | TextureCoords.FLIP_DIAGONAL));
    }
    get flipD() {
        return (this.flip & TextureCoords.FLIP_DIAGONAL) > 0;
    }
    set flipD(flip) {
        this.flip =
            (flip ? TextureCoords.FLIP_DIAGONAL : 0) | (this.flip & (TextureCoords.FLIP_VERTICAL | TextureCoords.FLIP_HORIZONTAL));
    }
    flipHorizontal() {
        this.flipH = !this.flipH;
        return this;
    }
    flipVertical() {
        this.flipV = !this.flipV;
        return this;
    }
    flipDiagonal() {
        this.flipD = !this.flipD;
        return this;
    }
    get s() {
        const { flipD } = this;
        return this.flipH
            ? maxCoord(this, flipD ? 'y' : 'x', flipD ? 'height' : 'width')
            : minCoord(this, flipD ? 'y' : 'x', flipD ? 'height' : 'width');
    }
    get t() {
        const { flipD } = this;
        return this.flipV
            ? maxCoord(this, flipD ? 'x' : 'y', flipD ? 'width' : 'height')
            : minCoord(this, flipD ? 'x' : 'y', flipD ? 'width' : 'height');
    }
    get s1() {
        const { flipD } = this;
        return this.flipH
            ? minCoord(this, flipD ? 'y' : 'x', flipD ? 'height' : 'width')
            : maxCoord(this, flipD ? 'y' : 'x', flipD ? 'height' : 'width');
    }
    get t1() {
        const { flipD } = this;
        return this.flipV
            ? minCoord(this, flipD ? 'x' : 'y', flipD ? 'width' : 'height')
            : maxCoord(this, flipD ? 'x' : 'y', flipD ? 'width' : 'height');
    }
    get u() {
        return this.s1 - this.s;
    }
    get v() {
        return this.t1 - this.t;
    }
}
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