feat: initialize mini program map engine

miniprogram/engine/renderer/mapRenderer.ts

@@ -0,0 +1,44 @@
+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,
+  }
+}