File size: 4,767 Bytes
b797337 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | import { Vector2 } from '../math/Vector2.js';
import { Vector3 } from '../math/Vector3.js';
import { Matrix4 } from '../math/Matrix4.js';
import { Triangle } from '../math/Triangle.js';
import { Object3D } from '../core/Object3D.js';
import { BufferGeometry } from '../core/BufferGeometry.js';
import { InterleavedBuffer } from '../core/InterleavedBuffer.js';
import { InterleavedBufferAttribute } from '../core/InterleavedBufferAttribute.js';
import { SpriteMaterial } from '../materials/SpriteMaterial.js';
let _geometry;
const _intersectPoint = /*@__PURE__*/ new Vector3();
const _worldScale = /*@__PURE__*/ new Vector3();
const _mvPosition = /*@__PURE__*/ new Vector3();
const _alignedPosition = /*@__PURE__*/ new Vector2();
const _rotatedPosition = /*@__PURE__*/ new Vector2();
const _viewWorldMatrix = /*@__PURE__*/ new Matrix4();
const _vA = /*@__PURE__*/ new Vector3();
const _vB = /*@__PURE__*/ new Vector3();
const _vC = /*@__PURE__*/ new Vector3();
const _uvA = /*@__PURE__*/ new Vector2();
const _uvB = /*@__PURE__*/ new Vector2();
const _uvC = /*@__PURE__*/ new Vector2();
class Sprite extends Object3D {
constructor( material = new SpriteMaterial() ) {
super();
this.isSprite = true;
this.type = 'Sprite';
if ( _geometry === undefined ) {
_geometry = new BufferGeometry();
const float32Array = new Float32Array( [
- 0.5, - 0.5, 0, 0, 0,
0.5, - 0.5, 0, 1, 0,
0.5, 0.5, 0, 1, 1,
- 0.5, 0.5, 0, 0, 1
] );
const interleavedBuffer = new InterleavedBuffer( float32Array, 5 );
_geometry.setIndex( [ 0, 1, 2, 0, 2, 3 ] );
_geometry.setAttribute( 'position', new InterleavedBufferAttribute( interleavedBuffer, 3, 0, false ) );
_geometry.setAttribute( 'uv', new InterleavedBufferAttribute( interleavedBuffer, 2, 3, false ) );
}
this.geometry = _geometry;
this.material = material;
this.center = new Vector2( 0.5, 0.5 );
}
raycast( raycaster, intersects ) {
if ( raycaster.camera === null ) {
console.error( 'THREE.Sprite: "Raycaster.camera" needs to be set in order to raycast against sprites.' );
}
_worldScale.setFromMatrixScale( this.matrixWorld );
_viewWorldMatrix.copy( raycaster.camera.matrixWorld );
this.modelViewMatrix.multiplyMatrices( raycaster.camera.matrixWorldInverse, this.matrixWorld );
_mvPosition.setFromMatrixPosition( this.modelViewMatrix );
if ( raycaster.camera.isPerspectiveCamera && this.material.sizeAttenuation === false ) {
_worldScale.multiplyScalar( - _mvPosition.z );
}
const rotation = this.material.rotation;
let sin, cos;
if ( rotation !== 0 ) {
cos = Math.cos( rotation );
sin = Math.sin( rotation );
}
const center = this.center;
transformVertex( _vA.set( - 0.5, - 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );
transformVertex( _vB.set( 0.5, - 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );
transformVertex( _vC.set( 0.5, 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );
_uvA.set( 0, 0 );
_uvB.set( 1, 0 );
_uvC.set( 1, 1 );
// check first triangle
let intersect = raycaster.ray.intersectTriangle( _vA, _vB, _vC, false, _intersectPoint );
if ( intersect === null ) {
// check second triangle
transformVertex( _vB.set( - 0.5, 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );
_uvB.set( 0, 1 );
intersect = raycaster.ray.intersectTriangle( _vA, _vC, _vB, false, _intersectPoint );
if ( intersect === null ) {
return;
}
}
const distance = raycaster.ray.origin.distanceTo( _intersectPoint );
if ( distance < raycaster.near || distance > raycaster.far ) return;
intersects.push( {
distance: distance,
point: _intersectPoint.clone(),
uv: Triangle.getInterpolation( _intersectPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2() ),
face: null,
object: this
} );
}
copy( source, recursive ) {
super.copy( source, recursive );
if ( source.center !== undefined ) this.center.copy( source.center );
this.material = source.material;
return this;
}
}
function transformVertex( vertexPosition, mvPosition, center, scale, sin, cos ) {
// compute position in camera space
_alignedPosition.subVectors( vertexPosition, center ).addScalar( 0.5 ).multiply( scale );
// to check if rotation is not zero
if ( sin !== undefined ) {
_rotatedPosition.x = ( cos * _alignedPosition.x ) - ( sin * _alignedPosition.y );
_rotatedPosition.y = ( sin * _alignedPosition.x ) + ( cos * _alignedPosition.y );
} else {
_rotatedPosition.copy( _alignedPosition );
}
vertexPosition.copy( mvPosition );
vertexPosition.x += _rotatedPosition.x;
vertexPosition.y += _rotatedPosition.y;
// transform to world space
vertexPosition.applyMatrix4( _viewWorldMatrix );
}
export { Sprite };
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