Spaces:
Running
Running
File size: 4,693 Bytes
a28eca3 |
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 |
import {
Box3,
Float32BufferAttribute,
InstancedBufferGeometry,
InstancedInterleavedBuffer,
InterleavedBufferAttribute,
Sphere,
Vector3,
WireframeGeometry
} from 'three';
const _box = new Box3();
const _vector = new Vector3();
class LineSegmentsGeometry extends InstancedBufferGeometry {
constructor() {
super();
this.isLineSegmentsGeometry = true;
this.type = 'LineSegmentsGeometry';
const positions = [ - 1, 2, 0, 1, 2, 0, - 1, 1, 0, 1, 1, 0, - 1, 0, 0, 1, 0, 0, - 1, - 1, 0, 1, - 1, 0 ];
const uvs = [ - 1, 2, 1, 2, - 1, 1, 1, 1, - 1, - 1, 1, - 1, - 1, - 2, 1, - 2 ];
const index = [ 0, 2, 1, 2, 3, 1, 2, 4, 3, 4, 5, 3, 4, 6, 5, 6, 7, 5 ];
this.setIndex( index );
this.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
}
applyMatrix4( matrix ) {
const start = this.attributes.instanceStart;
const end = this.attributes.instanceEnd;
if ( start !== undefined ) {
start.applyMatrix4( matrix );
end.applyMatrix4( matrix );
start.needsUpdate = true;
}
if ( this.boundingBox !== null ) {
this.computeBoundingBox();
}
if ( this.boundingSphere !== null ) {
this.computeBoundingSphere();
}
return this;
}
setPositions( array ) {
let lineSegments;
if ( array instanceof Float32Array ) {
lineSegments = array;
} else if ( Array.isArray( array ) ) {
lineSegments = new Float32Array( array );
}
const instanceBuffer = new InstancedInterleavedBuffer( lineSegments, 6, 1 ); // xyz, xyz
this.setAttribute( 'instanceStart', new InterleavedBufferAttribute( instanceBuffer, 3, 0 ) ); // xyz
this.setAttribute( 'instanceEnd', new InterleavedBufferAttribute( instanceBuffer, 3, 3 ) ); // xyz
this.instanceCount = this.attributes.instanceStart.count;
//
this.computeBoundingBox();
this.computeBoundingSphere();
return this;
}
setColors( array ) {
let colors;
if ( array instanceof Float32Array ) {
colors = array;
} else if ( Array.isArray( array ) ) {
colors = new Float32Array( array );
}
const instanceColorBuffer = new InstancedInterleavedBuffer( colors, 6, 1 ); // rgb, rgb
this.setAttribute( 'instanceColorStart', new InterleavedBufferAttribute( instanceColorBuffer, 3, 0 ) ); // rgb
this.setAttribute( 'instanceColorEnd', new InterleavedBufferAttribute( instanceColorBuffer, 3, 3 ) ); // rgb
return this;
}
fromWireframeGeometry( geometry ) {
this.setPositions( geometry.attributes.position.array );
return this;
}
fromEdgesGeometry( geometry ) {
this.setPositions( geometry.attributes.position.array );
return this;
}
fromMesh( mesh ) {
this.fromWireframeGeometry( new WireframeGeometry( mesh.geometry ) );
// set colors, maybe
return this;
}
fromLineSegments( lineSegments ) {
const geometry = lineSegments.geometry;
this.setPositions( geometry.attributes.position.array ); // assumes non-indexed
// set colors, maybe
return this;
}
computeBoundingBox() {
if ( this.boundingBox === null ) {
this.boundingBox = new Box3();
}
const start = this.attributes.instanceStart;
const end = this.attributes.instanceEnd;
if ( start !== undefined && end !== undefined ) {
this.boundingBox.setFromBufferAttribute( start );
_box.setFromBufferAttribute( end );
this.boundingBox.union( _box );
}
}
computeBoundingSphere() {
if ( this.boundingSphere === null ) {
this.boundingSphere = new Sphere();
}
if ( this.boundingBox === null ) {
this.computeBoundingBox();
}
const start = this.attributes.instanceStart;
const end = this.attributes.instanceEnd;
if ( start !== undefined && end !== undefined ) {
const center = this.boundingSphere.center;
this.boundingBox.getCenter( center );
let maxRadiusSq = 0;
for ( let i = 0, il = start.count; i < il; i ++ ) {
_vector.fromBufferAttribute( start, i );
maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector ) );
_vector.fromBufferAttribute( end, i );
maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector ) );
}
this.boundingSphere.radius = Math.sqrt( maxRadiusSq );
if ( isNaN( this.boundingSphere.radius ) ) {
console.error( 'THREE.LineSegmentsGeometry.computeBoundingSphere(): Computed radius is NaN. The instanced position data is likely to have NaN values.', this );
}
}
}
toJSON() {
// todo
}
applyMatrix( matrix ) {
console.warn( 'THREE.LineSegmentsGeometry: applyMatrix() has been renamed to applyMatrix4().' );
return this.applyMatrix4( matrix );
}
}
export { LineSegmentsGeometry };
|