import { Camera } from './Camera.js';
class OrthographicCamera extends Camera {
constructor( left = - 1, right = 1, top = 1, bottom = - 1, near = 0.1, far = 2000 ) {
super();
this.isOrthographicCamera = true;
this.type = 'OrthographicCamera';
this.zoom = 1;
this.view = null;
this.left = left;
this.right = right;
this.top = top;
this.bottom = bottom;
this.near = near;
this.far = far;
this.updateProjectionMatrix();
}
copy( source, recursive ) {
super.copy( source, recursive );
this.left = source.left;
this.right = source.right;
this.top = source.top;
this.bottom = source.bottom;
this.near = source.near;
this.far = source.far;
this.zoom = source.zoom;
this.view = source.view === null ? null : Object.assign( {}, source.view );
return this;
}
setViewOffset( fullWidth, fullHeight, x, y, width, height ) {
if ( this.view === null ) {
this.view = {
enabled: true,
fullWidth: 1,
fullHeight: 1,
offsetX: 0,
offsetY: 0,
width: 1,
height: 1
};
}
this.view.enabled = true;
this.view.fullWidth = fullWidth;
this.view.fullHeight = fullHeight;
this.view.offsetX = x;
this.view.offsetY = y;
this.view.width = width;
this.view.height = height;
this.updateProjectionMatrix();
}
clearViewOffset() {
if ( this.view !== null ) {
this.view.enabled = false;
}
this.updateProjectionMatrix();
}
updateProjectionMatrix() {
const dx = ( this.right - this.left ) / ( 2 * this.zoom );
const dy = ( this.top - this.bottom ) / ( 2 * this.zoom );
const cx = ( this.right + this.left ) / 2;
const cy = ( this.top + this.bottom ) / 2;
let left = cx - dx;
let right = cx + dx;
let top = cy + dy;
let bottom = cy - dy;
if ( this.view !== null && this.view.enabled ) {
const scaleW = ( this.right - this.left ) / this.view.fullWidth / this.zoom;
const scaleH = ( this.top - this.bottom ) / this.view.fullHeight / this.zoom;
left += scaleW * this.view.offsetX;
right = left + scaleW * this.view.width;
top -= scaleH * this.view.offsetY;
bottom = top - scaleH * this.view.height;
}
this.projectionMatrix.makeOrthographic( left, right, top, bottom, this.near, this.far, this.coordinateSystem );
this.projectionMatrixInverse.copy( this.projectionMatrix ).invert();
}
toJSON( meta ) {
const data = super.toJSON( meta );
data.object.zoom = this.zoom;
data.object.left = this.left;
data.object.right = this.right;
data.object.top = this.top;
data.object.bottom = this.bottom;
data.object.near = this.near;
data.object.far = this.far;
if ( this.view !== null ) data.object.view = Object.assign( {}, this.view );
return data;
}
}
export { OrthographicCamera };