37 lines
1.1 KiB
JavaScript
37 lines
1.1 KiB
JavaScript
import * as THREE from 'three';
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class TaperedLink extends THREE.Group {
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constructor(baseMaterial) {
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super();
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const geometry = new THREE.ConeGeometry( 0.75, 1, 32, true );
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const cplane = new THREE.Plane(new THREE.Vector3(0, -1, 0), 0.5);
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const material = baseMaterial.clone();
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material.clippingPlanes = [ cplane ];
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this.object = new THREE.Mesh( geometry, material );
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this.add( this.object );
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}
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update(r1, r2, l) {
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const kraw = ( r1 - r2 );
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const k = ( kraw == 0 ) ? 0.001 : kraw;
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if( k > 0 ) {
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const h = l * r1 / k;
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this.object.scale.copy(new THREE.Vector3(r1, h, r1));
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this.object.material.clippingPlanes[0].normal.y = -1;
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this.object.material.clippingPlanes[0].constant = l / 2;
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this.object.position.copy(new THREE.Vector3(0, h/2 - l/2, 0));
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} else {
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const h = l * r2 / k;
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this.object.scale.copy(new THREE.Vector3(r2, h, r2));
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this.object.material.clippingPlanes[0].normal.y = 1;
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this.object.material.clippingPlanes[0].constant = l / 2;
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this.object.position.copy(new THREE.Vector3(0, h / 2 + l / 2, 0));
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}
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}
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}
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export { TaperedLink };
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