62 lines
1.7 KiB
TypeScript
62 lines
1.7 KiB
TypeScript
import { type CameraState } from '../camera/camera'
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import { lonLatToWorldTile } from '../../utils/projection'
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import { worldToScreen } from '../camera/camera'
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import { type MapLayer, type LayerRenderContext } from './mapLayer'
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import { type MapScene } from '../renderer/mapRenderer'
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export interface ScreenPoint {
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x: number
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y: number
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}
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export class TrackLayer implements MapLayer {
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projectPoints(scene: MapScene, camera: CameraState): ScreenPoint[] {
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return scene.track.map((point) => {
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const worldPoint = lonLatToWorldTile(point, scene.zoom)
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const screenPoint = worldToScreen(camera, worldPoint, false)
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return {
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x: screenPoint.x + scene.translateX,
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y: screenPoint.y + scene.translateY,
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}
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})
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}
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draw(context: LayerRenderContext): void {
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const { ctx, camera, scene } = context
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const points = this.projectPoints(scene, camera)
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ctx.save()
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ctx.lineCap = 'round'
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ctx.lineJoin = 'round'
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ctx.strokeStyle = 'rgba(23, 109, 93, 0.96)'
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ctx.lineWidth = 6
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ctx.beginPath()
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points.forEach((screenPoint, index) => {
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if (index === 0) {
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ctx.moveTo(screenPoint.x, screenPoint.y)
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return
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}
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ctx.lineTo(screenPoint.x, screenPoint.y)
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})
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ctx.stroke()
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ctx.fillStyle = '#f7fbf2'
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ctx.strokeStyle = '#176d5d'
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ctx.lineWidth = 4
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points.forEach((screenPoint, index) => {
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ctx.beginPath()
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ctx.arc(screenPoint.x, screenPoint.y, 10, 0, Math.PI * 2)
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ctx.fill()
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ctx.stroke()
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ctx.fillStyle = '#176d5d'
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ctx.font = 'bold 14px sans-serif'
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ctx.textAlign = 'center'
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ctx.textBaseline = 'middle'
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ctx.fillText(String(index + 1), screenPoint.x, screenPoint.y)
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ctx.fillStyle = '#f7fbf2'
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})
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ctx.restore()
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}
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}
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