Class Perspective

examples/extern/gmath.bundle.js:1466–1500

    return (x > y ? x - y : x - y) <= epsilon;
}
class Perspective {
    left;
    right;
    bottom;
    top;
    near;
    far;
    constructor(left, right, bottom, top, near, far){
        this.left = left;
        this.right = right;
        this.bottom = bottom;
        this.top = top;
        this.near = near;
        this.far = far;
    }
    toMatrix4() {
        if (this.left > this.right) {
            throw new RangeError(`perspective.left (${this.right}) cannot be greater than perspective.right (${this.right})`);
        }
        if (this.bottom > this.top) {
            throw new RangeError(`perspective.bottom (${this.bottom}) cannot be greater than perspective.top (${this.top})`);
        }
        if (this.near > this.far) {
            throw new RangeError(`perspective.near (${this.near}) cannot be greater than perspective.far (${this.far})`);
        }
        const c0r0 = 2 * this.near / (this.right - this.left);
        const c1r1 = 2 * this.near / (this.top - this.bottom);
        const c2r0 = (this.right + this.left) / (this.right - this.left);
        const c2r1 = (this.top + this.bottom) / (this.top - this.bottom);
        const c2r2 = -(this.far + this.near) / (this.far - this.near);
        const c2r3 = -1;
        const c3r2 = -(2 * this.far * this.near) / (this.far - this.near);
        return Matrix4.from(c0r0, 0, 0, 0, 0, c1r1, 0, 0, c2r0, c2r1, c2r2, c2r3, 0, 0, c3r2, 0);
    }
}
class PerspectiveFov {
    fovy;
    aspect;