mini-prog/miniprogram/engine/renderer/mapRenderer.ts

import { type CameraState } from '../camera/camera'
import { type TileStoreStats } from '../tile/tileStore'
import { type LonLatPoint } from '../../utils/projection'

export interface MapScene {
  tileSource: string
  zoom: number
  centerTileX: number
  centerTileY: number
  viewportWidth: number
  viewportHeight: number
  visibleColumns: number
  overdraw: number
  translateX: number
  translateY: number
  rotationRad: number
  previewScale: number
  previewOriginX: number
  previewOriginY: number
  track: LonLatPoint[]
  gpsPoint: LonLatPoint
}

export type MapRendererStats = TileStoreStats

export interface MapRenderer {
  attachCanvas(canvasNode: any, width: number, height: number, dpr: number): void
  updateScene(scene: MapScene): void
  setAnimationPaused(paused: boolean): void
  destroy(): void
}

export function buildCamera(scene: MapScene): CameraState {
  return {
    centerWorldX: scene.centerTileX,
    centerWorldY: scene.centerTileY,
    viewportWidth: scene.viewportWidth,
    viewportHeight: scene.viewportHeight,
    visibleColumns: scene.visibleColumns,
    translateX: scene.translateX,
    translateY: scene.translateY,
    rotationRad: scene.rotationRad,
  }
}