import { Camera } from '../cameras/Camera.js';
import { Vector3 } from '../math/Vector3.js';
import { LineSegments } from '../objects/LineSegments.js';
import { Color } from '../math/Color.js';
import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
import { BufferGeometry } from '../core/BufferGeometry.js';
import { Float32BufferAttribute } from '../core/BufferAttribute.js';
const _vector = /*@__PURE__*/ new Vector3();
const _camera = /*@__PURE__*/ new Camera();
/**
* - shows frustum, line of sight and up of the camera
* - suitable for fast updates
* - based on frustum visualization in lightgl.js shadowmap example
* https://github.com/evanw/lightgl.js/blob/master/tests/shadowmap.html
*/
class CameraHelper extends LineSegments {
constructor( camera ) {
const geometry = new BufferGeometry();
const material = new LineBasicMaterial( { color: 0xffffff, vertexColors: true, toneMapped: false } );
const vertices = [];
const colors = [];
const pointMap = {};
// near
addLine( 'n1', 'n2' );
addLine( 'n2', 'n4' );
addLine( 'n4', 'n3' );
addLine( 'n3', 'n1' );
// far
addLine( 'f1', 'f2' );
addLine( 'f2', 'f4' );
addLine( 'f4', 'f3' );
addLine( 'f3', 'f1' );
// sides
addLine( 'n1', 'f1' );
addLine( 'n2', 'f2' );
addLine( 'n3', 'f3' );
addLine( 'n4', 'f4' );
// cone
addLine( 'p', 'n1' );
addLine( 'p', 'n2' );
addLine( 'p', 'n3' );
addLine( 'p', 'n4' );
// up
addLine( 'u1', 'u2' );
addLine( 'u2', 'u3' );
addLine( 'u3', 'u1' );
// target
addLine( 'c', 't' );
addLine( 'p', 'c' );
// cross
addLine( 'cn1', 'cn2' );
addLine( 'cn3', 'cn4' );
addLine( 'cf1', 'cf2' );
addLine( 'cf3', 'cf4' );
function addLine( a, b ) {
addPoint( a );
addPoint( b );
}
function addPoint( id ) {
vertices.push( 0, 0, 0 );
colors.push( 0, 0, 0 );
if ( pointMap[ id ] === undefined ) {
pointMap[ id ] = [];
}
pointMap[ id ].push( ( vertices.length / 3 ) - 1 );
}
geometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
geometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
super( geometry, material );
this.type = 'CameraHelper';
this.camera = camera;
if ( this.camera.updateProjectionMatrix ) this.camera.updateProjectionMatrix();
this.matrix = camera.matrixWorld;
this.matrixAutoUpdate = false;
this.pointMap = pointMap;
this.update();
// colors
const colorFrustum = new Color( 0xffaa00 );
const colorCone = new Color( 0xff0000 );
const colorUp = new Color( 0x00aaff );
const colorTarget = new Color( 0xffffff );
const colorCross = new Color( 0x333333 );
this.setColors( colorFrustum, colorCone, colorUp, colorTarget, colorCross );
}
setColors( frustum, cone, up, target, cross ) {
const geometry = this.geometry;
const colorAttribute = geometry.getAttribute( 'color' );
// near
colorAttribute.setXYZ( 0, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 1, frustum.r, frustum.g, frustum.b ); // n1, n2
colorAttribute.setXYZ( 2, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 3, frustum.r, frustum.g, frustum.b ); // n2, n4
colorAttribute.setXYZ( 4, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 5, frustum.r, frustum.g, frustum.b ); // n4, n3
colorAttribute.setXYZ( 6, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 7, frustum.r, frustum.g, frustum.b ); // n3, n1
// far
colorAttribute.setXYZ( 8, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 9, frustum.r, frustum.g, frustum.b ); // f1, f2
colorAttribute.setXYZ( 10, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 11, frustum.r, frustum.g, frustum.b ); // f2, f4
colorAttribute.setXYZ( 12, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 13, frustum.r, frustum.g, frustum.b ); // f4, f3
colorAttribute.setXYZ( 14, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 15, frustum.r, frustum.g, frustum.b ); // f3, f1
// sides
colorAttribute.setXYZ( 16, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 17, frustum.r, frustum.g, frustum.b ); // n1, f1
colorAttribute.setXYZ( 18, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 19, frustum.r, frustum.g, frustum.b ); // n2, f2
colorAttribute.setXYZ( 20, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 21, frustum.r, frustum.g, frustum.b ); // n3, f3
colorAttribute.setXYZ( 22, frustum.r, frustum.g, frustum.b ); colorAttribute.setXYZ( 23, frustum.r, frustum.g, frustum.b ); // n4, f4
// cone
colorAttribute.setXYZ( 24, cone.r, cone.g, cone.b ); colorAttribute.setXYZ( 25, cone.r, cone.g, cone.b ); // p, n1
colorAttribute.setXYZ( 26, cone.r, cone.g, cone.b ); colorAttribute.setXYZ( 27, cone.r, cone.g, cone.b ); // p, n2
colorAttribute.setXYZ( 28, cone.r, cone.g, cone.b ); colorAttribute.setXYZ( 29, cone.r, cone.g, cone.b ); // p, n3
colorAttribute.setXYZ( 30, cone.r, cone.g, cone.b ); colorAttribute.setXYZ( 31, cone.r, cone.g, cone.b ); // p, n4
// up
colorAttribute.setXYZ( 32, up.r, up.g, up.b ); colorAttribute.setXYZ( 33, up.r, up.g, up.b ); // u1, u2
colorAttribute.setXYZ( 34, up.r, up.g, up.b ); colorAttribute.setXYZ( 35, up.r, up.g, up.b ); // u2, u3
colorAttribute.setXYZ( 36, up.r, up.g, up.b ); colorAttribute.setXYZ( 37, up.r, up.g, up.b ); // u3, u1
// target
colorAttribute.setXYZ( 38, target.r, target.g, target.b ); colorAttribute.setXYZ( 39, target.r, target.g, target.b ); // c, t
colorAttribute.setXYZ( 40, cross.r, cross.g, cross.b ); colorAttribute.setXYZ( 41, cross.r, cross.g, cross.b ); // p, c
// cross
colorAttribute.setXYZ( 42, cross.r, cross.g, cross.b ); colorAttribute.setXYZ( 43, cross.r, cross.g, cross.b ); // cn1, cn2
colorAttribute.setXYZ( 44, cross.r, cross.g, cross.b ); colorAttribute.setXYZ( 45, cross.r, cross.g, cross.b ); // cn3, cn4
colorAttribute.setXYZ( 46, cross.r, cross.g, cross.b ); colorAttribute.setXYZ( 47, cross.r, cross.g, cross.b ); // cf1, cf2
colorAttribute.setXYZ( 48, cross.r, cross.g, cross.b ); colorAttribute.setXYZ( 49, cross.r, cross.g, cross.b ); // cf3, cf4
colorAttribute.needsUpdate = true;
}
update() {
const geometry = this.geometry;
const pointMap = this.pointMap;
const w = 1, h = 1;
// we need just camera projection matrix inverse
// world matrix must be identity
_camera.projectionMatrixInverse.copy( this.camera.projectionMatrixInverse );
// center / target
setPoint( 'c', pointMap, geometry, _camera, 0, 0, - 1 );
setPoint( 't', pointMap, geometry, _camera, 0, 0, 1 );
// near
setPoint( 'n1', pointMap, geometry, _camera, - w, - h, - 1 );
setPoint( 'n2', pointMap, geometry, _camera, w, - h, - 1 );
setPoint( 'n3', pointMap, geometry, _camera, - w, h, - 1 );
setPoint( 'n4', pointMap, geometry, _camera, w, h, - 1 );
// far
setPoint( 'f1', pointMap, geometry, _camera, - w, - h, 1 );
setPoint( 'f2', pointMap, geometry, _camera, w, - h, 1 );
setPoint( 'f3', pointMap, geometry, _camera, - w, h, 1 );
setPoint( 'f4', pointMap, geometry, _camera, w, h, 1 );
// up
setPoint( 'u1', pointMap, geometry, _camera, w * 0.7, h * 1.1, - 1 );
setPoint( 'u2', pointMap, geometry, _camera, - w * 0.7, h * 1.1, - 1 );
setPoint( 'u3', pointMap, geometry, _camera, 0, h * 2, - 1 );
// cross
setPoint( 'cf1', pointMap, geometry, _camera, - w, 0, 1 );
setPoint( 'cf2', pointMap, geometry, _camera, w, 0, 1 );
setPoint( 'cf3', pointMap, geometry, _camera, 0, - h, 1 );
setPoint( 'cf4', pointMap, geometry, _camera, 0, h, 1 );
setPoint( 'cn1', pointMap, geometry, _camera, - w, 0, - 1 );
setPoint( 'cn2', pointMap, geometry, _camera, w, 0, - 1 );
setPoint( 'cn3', pointMap, geometry, _camera, 0, - h, - 1 );
setPoint( 'cn4', pointMap, geometry, _camera, 0, h, - 1 );
geometry.getAttribute( 'position' ).needsUpdate = true;
}
dispose() {
this.geometry.dispose();
this.material.dispose();
}
}
function setPoint( point, pointMap, geometry, camera, x, y, z ) {
_vector.set( x, y, z ).unproject( camera );
const points = pointMap[ point ];
if ( points !== undefined ) {
const position = geometry.getAttribute( 'position' );
for ( let i = 0, l = points.length; i < l; i ++ ) {
position.setXYZ( points[ i ], _vector.x, _vector.y, _vector.z );
}
}
}
export { CameraHelper };
