96 lines
2.8 KiB
JavaScript
96 lines
2.8 KiB
JavaScript
import {MathUtils, Matrix4, PerspectiveCamera} from "three";
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export class CombinedCamera extends PerspectiveCamera {
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/**
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* @param fov {number}
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* @param aspect {number}
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* @param near {number}
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* @param far {number}
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* @param ortho {number}
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*/
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constructor(fov, aspect, near, far, ortho) {
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super(fov, aspect, near, far);
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this.ortho = ortho;
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this.distance = 1;
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}
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updateProjectionMatrix() {
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if (!this.ortographicProjection)
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this.ortographicProjection = new Matrix4();
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if (!this.perspectiveProjection)
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this.perspectiveProjection = new Matrix4();
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//copied from PerspectiveCamera
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const near = this.near;
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let top = near * Math.tan( MathUtils.DEG2RAD * 0.5 * this.fov ) / this.zoom;
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let height = 2 * top;
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let width = this.aspect * height;
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let left = - 0.5 * width;
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const view = this.view;
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if ( this.view !== null && this.view.enabled ) {
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const fullWidth = view.fullWidth,
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fullHeight = view.fullHeight;
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left += view.offsetX * width / fullWidth;
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top -= view.offsetY * height / fullHeight;
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width *= view.width / fullWidth;
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height *= view.height / fullHeight;
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}
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const skew = this.filmOffset;
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if ( skew !== 0 ) left += near * skew / this.getFilmWidth();
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// this part different to PerspectiveCamera
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let normalizedOrtho = -Math.pow(this.ortho - 1, 4) + 1;
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let orthoTop = this.distance * Math.tan( MathUtils.DEG2RAD * 0.5 * this.fov ) / this.zoom;
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let orthoHeight = 2 * orthoTop;
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let orthoWidth = this.aspect * orthoHeight;
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let orthoLeft = - 0.5 * orthoWidth;
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this.perspectiveProjection.makePerspective( left, left + width, top, top - height, near, this.far );
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this.ortographicProjection.makeOrthographic( orthoLeft, orthoLeft + orthoWidth, orthoTop, orthoTop - orthoHeight, near, this.far );
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for (let i = 0; i < 16; i++){
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this.projectionMatrix.elements[i] = (this.perspectiveProjection.elements[i] * (1 - normalizedOrtho)) + (this.ortographicProjection.elements[i] * normalizedOrtho);
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}
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// to here
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this.projectionMatrixInverse.copy( this.projectionMatrix ).invert();
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}
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/**
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* @returns {boolean}
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*/
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get isPerspectiveCamera() {
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return this.ortho < 1;
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}
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/**
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* @returns {boolean}
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*/
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get isOrthographicCamera() {
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return !this.isPerspectiveCamera;
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}
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/**
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* @returns {string}
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*/
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get type() {
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return this.isPerspectiveCamera ? 'PerspectiveCamera' : 'OrthographicCamera';
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}
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/**
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* @param type {string}
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*/
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set type(type) {
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//ignore
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}
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} |