awv3/three/combinedcamera.js

⚡ AWV3 embedded CAD

import * as THREE from 'three';

export default class CombinedCamera extends THREE.PerspectiveCamera {
    constructor(view, options = {}) {
        super();

        options = {
            fov: 30,
            aspect: 0,
            near: 5,
            far: 100000,
            target: new THREE.Vector3(0, 0, 0),
            position: new THREE.Vector3(0, 0, 1000),
            up: new THREE.Vector3(0, 0, 1),
            ...options
        };

        this.host = view;
        this.fov = options.fov;
        this.aspect = options.aspect;
        this.near = options.near;
        this.far = options.far;
        this.target = options.target;
        this.lookAt(this.target);
        this.position.copy(options.position);
        this.up.copy(options.up);
        this.updateProjectionMatrix();

        this._orthographic = false;
        this._orthographicCamera = new THREE.OrthographicCamera(-1, 1, 1, -1, 0, 1);
    }

    get display() {
        if (this._orthographic) {
            var halfTg = Math.tan(this.fov / 2 * THREE.Math.DEG2RAD);
            var focusDistance = this.target.distanceTo(this.position);
            var height = halfTg * focusDistance;
            var camera = this._orthographicCamera;
            camera.target = this.target;
            camera.left = -height * this.aspect;
            camera.right = height * this.aspect;
            camera.top = height;
            camera.bottom = -height;
            camera.near = this.near;
            camera.far = this.far;
            camera.position.copy(this.position);
            camera.up.copy(this.up);
            camera.lookAt(this.target);
            camera.updateProjectionMatrix();
            camera.updateMatrixWorld(true);
            return camera;
        } else
            return this;
    }

    get orthographic() {
        return this._orthographic;
    }

    set orthographic(value) {
        this._orthographic = value;
        this.host.invalidate && this.host.invalidate();
    }
}