Hugging Face's logo

Spaces:
k-l-lambda
/
starry
Running

App Files Community
starry
File size: 4,585 Bytes
2b7aae2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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
 
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) {
		super();

		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 !== undefined ? material : new SpriteMaterial();

		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.getUV(_intersectPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2()),
			face: null,
			object: this,
		});
	}

	copy(source) {
		super.copy(source);

		if (source.center !== undefined) this.center.copy(source.center);

		this.material = source.material;

		return this;
	}
}

Sprite.prototype.isSprite = true;

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 };