nanogl-camera/ortho-lens.js

camera object for nanogl

import { mat4 } from "gl-matrix";
class OrthographicLens {
    constructor() {
        this._near = 0.01;
        this._far = 10.0;
        this._xMin = -1.0;
        this._xMax = 1.0;
        this._yMin = -1.0;
        this._yMax = 1.0;
        this._aspect = 1.0;
        this._proj = mat4.create();
        this._valid = false;
    }
    getProjection() {
        if (!this._valid) {
            this._updateProjection();
        }
        return this._proj;
    }
    setBound(xMin, xMax, yMin, yMax) {
        this._xMin = xMin;
        this._xMax = xMax;
        this._yMin = yMin;
        this._yMax = yMax;
        this._invalidate();
    }
    set near(v) {
        if (this._near !== v) {
            this._near = v;
            this._invalidate();
        }
    }
    get near() { return this._near; }
    set far(v) {
        if (this._far !== v) {
            this._far = v;
            this._invalidate();
        }
    }
    get far() { return this._far; }
    set aspect(v) {
        if (this._aspect !== v) {
            this._aspect = v;
        }
    }
    get aspect() { return this._aspect; }
    _updateProjection() {
        mat4.ortho(this._proj, this._xMin, this._xMax, this._yMin, this._yMax, this._near, this._far);
        this._valid = true;
    }
    _invalidate() {
        this._valid = false;
    }
}
export default OrthographicLens;