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Merge pull request #27 from andrewisen-tikab/feature
Add `LabelsManager`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| import * as THREE from 'three'; | ||
| import type { TransformShapeControls } from './TransformShapeControls'; | ||
| import { Vertex } from '../../types'; | ||
| import { getLength2D, getMidpointOffsetFromLine } from '../../utils'; | ||
| import { addPrefix } from './labels'; | ||
| import { CSS2DObject } from 'three/addons/renderers/CSS2DRenderer.js'; | ||
|
|
||
| /** | ||
| * Manages the labels for the {@link TransformShapeControls}. | ||
| */ | ||
| export default class LabelsManager extends THREE.EventDispatcher { | ||
| private transformShapeControls: TransformShapeControls; | ||
|
|
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| private labels: CSS2DObject[] = []; | ||
|
|
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| constructor(transformShapeControls: TransformShapeControls) { | ||
| super(); | ||
| this.transformShapeControls = transformShapeControls; | ||
| this.labels = []; | ||
| } | ||
|
|
||
| /** | ||
| * Call this every frame. | ||
| */ | ||
| public update() { | ||
| this.updatePositions(); | ||
| } | ||
|
|
||
| /** | ||
| * Add new labels to the object. | ||
| */ | ||
| public addLabels() { | ||
| if (!this.transformShapeControls.object) return; | ||
| this.labels = []; | ||
| const vertices = this.transformShapeControls.object.getVertices(); | ||
|
|
||
| // Get distance from camera to center of object | ||
| const offsetDistance = 1; | ||
|
|
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| const center: Vertex = [ | ||
| this.transformShapeControls.vertexCenter.x, | ||
| this.transformShapeControls.vertexCenter.y, | ||
| this.transformShapeControls.vertexCenter.z, | ||
| ]; | ||
| for (let index = 0; index < vertices.length; index++) { | ||
| const vertex = vertices[index]; | ||
| if (index === 0) continue; | ||
| const previousVertex = vertices[index - 1]; | ||
| const label = this.generateLabel( | ||
| this.transformShapeControls.labelsGroup, | ||
| index, | ||
| vertex, | ||
| previousVertex, | ||
| center, | ||
| offsetDistance, | ||
| ); | ||
| this.labels.push(label); | ||
| } | ||
|
|
||
| if (this.transformShapeControls.object!.getCloseLine()) { | ||
| const vertex = vertices[0]; | ||
| const previousVertex = vertices[vertices.length - 1]; | ||
|
|
||
| const label = this.generateLabel( | ||
| this.transformShapeControls.labelsGroup, | ||
| vertices.length, | ||
| vertex, | ||
| previousVertex, | ||
| center, | ||
| offsetDistance, | ||
| ); | ||
| this.labels.push(label); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Updates the position of the labels based on the camera's distance. | ||
| */ | ||
| private updatePositions(): void { | ||
| if (!this.transformShapeControls.object) return; | ||
|
|
||
| const vertices = this.transformShapeControls.object.getVertices(); | ||
| const offsetDistance = | ||
| this.transformShapeControls.vertexCenter.distanceTo( | ||
| this.transformShapeControls.camera.position, | ||
| ) / | ||
| 100 + | ||
| 1.1; | ||
|
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| const center: Vertex = [ | ||
| this.transformShapeControls.vertexCenter.x, | ||
| this.transformShapeControls.vertexCenter.y, | ||
| this.transformShapeControls.vertexCenter.z, | ||
| ]; | ||
| for (let i = 0; i < this.labels.length; i++) { | ||
| const label = this.labels[i]; | ||
| const firstVertex = vertices[i]; | ||
| const secondVertex = i === vertices.length - 1 ? vertices[0] : vertices[i + 1]; | ||
| this.updatePosition(label, firstVertex, secondVertex, center, offsetDistance); | ||
| } | ||
| } | ||
|
|
||
| private updatePosition( | ||
| label: CSS2DObject, | ||
| firstVertex: Vertex, | ||
| secondVertex: Vertex, | ||
| center: Vertex, | ||
| offsetDistance: number, | ||
| ) { | ||
| const offset = getMidpointOffsetFromLine(firstVertex, secondVertex, center, offsetDistance); | ||
| label.position.set(offset[0], offset[1], offset[2]); | ||
| } | ||
|
|
||
| private generateLabel( | ||
| parent: THREE.Object3D, | ||
| index: number, | ||
| firstVertex: Vertex, | ||
| secondVertex: Vertex, | ||
| center: Vertex, | ||
| offsetDistance: number, | ||
| ): CSS2DObject { | ||
| const length = getLength2D(firstVertex, secondVertex); | ||
|
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| const divElement = document.createElement('div'); | ||
| divElement.className = 'shape-3d-label-container'; | ||
|
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| const inputElement = document.createElement('input'); | ||
| inputElement.type = 'text'; | ||
|
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| inputElement.id = 'myInput'; | ||
| inputElement.className = 'shape-3d-label'; | ||
| inputElement.placeholder = `${length.toFixed(2)}`; | ||
| inputElement.setAttribute('size', `${inputElement.getAttribute('placeholder')!.length}`); | ||
| inputElement.oninput = addPrefix.bind(inputElement); | ||
|
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| inputElement.addEventListener('blur', (e) => { | ||
| this.onBlur(e, index); | ||
| }); | ||
|
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| divElement.appendChild(inputElement); | ||
| const label = new CSS2DObject(divElement); | ||
| this.updatePosition(label, firstVertex, secondVertex, center, offsetDistance); | ||
| parent.add(label); | ||
|
|
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| return label; | ||
| } | ||
|
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| onBlur(e: FocusEvent, index: number) { | ||
| // Get value of input | ||
| const inputElement = e.target as HTMLInputElement; | ||
| const value = inputElement.value; | ||
|
|
||
| const number = parseFloat(value); | ||
| if (isNaN(number)) return; | ||
| if (number <= 0) return; | ||
| this.transformShapeControls.setLineLength(index, number); | ||
| } | ||
| } |
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