From ef30053ff3824c07d0c4d6879d3af2de5cc7f9cf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E6=AD=A3=E5=AD=A6?= <zhengxue.lzx@antfin.com>
Date: Fri, 25 Jan 2019 11:36:11 +0800
Subject: [PATCH] feat(mapbox): add mapbox

---
 src/map/baseMap.js |   0
 src/map/mapbox.js  | 124 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 124 insertions(+)
 delete mode 100644 src/map/baseMap.js
 create mode 100644 src/map/mapbox.js

diff --git a/src/map/baseMap.js b/src/map/baseMap.js
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/src/map/mapbox.js b/src/map/mapbox.js
new file mode 100644
index 0000000000..3512c51150
--- /dev/null
+++ b/src/map/mapbox.js
@@ -0,0 +1,124 @@
+import Base from '../core/base';
+import Util from '../util';
+import { scene } from '../global';
+import * as THREE from '../core/three';
+const WORLD_SIZE = 512;
+export class MapBoxProvider extends Base {
+  getDefaultCfg() {
+    return Util.assign(scene, {
+      resizeEnable: true,
+      viewMode: '3D'
+    });
+  }
+  constructor(container, cfg, engine) {
+    super(cfg);
+    this.container = container;
+    this.engine = engine;
+    const scene = engine._scene;
+    this.initMap();
+    this.addOverLayer();
+    scene.position.x = scene.position.y = WORLD_SIZE / 2;
+    scene.matrixAutoUpdate = false;
+    setTimeout(() => {
+      this.emit('mapLoad');
+    }, 100);
+
+  }
+
+  initMap() {
+    mapboxgl.accessToken = 'pk.eyJ1IjoibHp4dWUiLCJhIjoiYnhfTURyRSJ9.Ugm314vAKPHBzcPmY1p4KQ';
+    this.map = new mapboxgl.Map(this._attrs);
+    this.map.on('move', () => {
+      this.updateCamera();
+    });
+    this.updateCamera();
+  }
+  asyncCamera() {
+    const engine = this.engine;
+    const camera = engine._camera;
+    const scene = engine._scene;
+    // Build a projection matrix, paralleling the code found in Mapbox GL JS
+    const fov = 0.6435011087932844;
+    const cameraToCenterDistance = 0.5 / Math.tan(fov / 2) * this.map.transform.height;
+    const halfFov = fov / 2;
+    const groundAngle = Math.PI / 2 + this.map.transform._pitch;
+    const topHalfSurfaceDistance = Math.sin(halfFov) * cameraToCenterDistance / Math.sin(Math.PI - groundAngle - halfFov);
+
+    // Calculate z distance of the farthest fragment that should be rendered.
+    const furthestDistance = Math.cos(Math.PI / 2 - this.map.transform._pitch) * topHalfSurfaceDistance + cameraToCenterDistance;
+
+    // Add a bit extra to avoid precision problems when a fragment's distance is exactly `furthestDistance`
+    const farZ = furthestDistance * 1.01;
+
+    camera.projectionMatrix = this.makePerspectiveMatrix(fov, this.map.transform.width / this.map.transform.height, 1, farZ);
+
+
+    const cameraWorldMatrix = new THREE.Matrix4();
+    const cameraTranslateZ = new THREE.Matrix4().makeTranslation(0, 0, cameraToCenterDistance);
+    const cameraRotateX = new THREE.Matrix4().makeRotationX(this.map.transform._pitch);
+    const cameraRotateZ = new THREE.Matrix4().makeRotationZ(this.map.transform.angle);
+
+    // Unlike the Mapbox GL JS camera, separate camera translation and rotation out into its world matrix
+    // If this is applied directly to the projection matrix, it will work OK but break raycasting
+    cameraWorldMatrix
+        .premultiply(cameraTranslateZ)
+        .premultiply(cameraRotateX)
+        .premultiply(cameraRotateZ);
+
+    camera.matrixWorld.copy(cameraWorldMatrix);
+
+
+    const zoomPow = this.map.transform.scale;
+    // Handle scaling and translation of objects in the map in the world's matrix transform, not the camera
+    const scale = new THREE.Matrix4();
+    const translateCenter = new THREE.Matrix4();
+    const translateMap = new THREE.Matrix4();
+    const rotateMap = new THREE.Matrix4();
+    scale
+        .makeScale(zoomPow, zoomPow, zoomPow);
+    translateCenter
+        .makeTranslation(WORLD_SIZE / 2, -WORLD_SIZE / 2, 0);
+    translateMap
+        .makeTranslation(-this.map.transform.x, this.map.transform.y, 0);
+    rotateMap
+        .makeRotationZ(Math.PI);
+
+    scene.matrix = new THREE.Matrix4();
+    scene.matrix
+        .premultiply(rotateMap)
+        .premultiply(translateCenter)
+        .premultiply(scale)
+        .premultiply(translateMap);
+  }
+  makePerspectiveMatrix(fovy, aspect, near, far) {
+    const out = new THREE.Matrix4();
+    const f = 1.0 / Math.tan(fovy / 2),
+      nf = 1 / (near - far);
+    const newMatrix = [
+      f / aspect, 0, 0, 0,
+      0, f, 0, 0,
+      0, 0, (far + near) * nf, -1,
+      0, 0, (2 * far * near) * nf, 0
+    ];
+    out.elements = newMatrix;
+    return out;
+  }
+
+  projectFlat(lnglat) {
+    return this.map.lngLatToGeodeticCoord(lnglat);
+  }
+  getCenter() {
+    return this.map.getCenter();
+  }
+  getCenterFlat() {
+    return this.projectFlat(this.getCenter());
+  }
+  addOverLayer() {
+    const canvasContainer = document.getElementById(this.container);
+    this.canvasContainer = canvasContainer;
+    this.renderDom = document.createElement('div');
+    this.renderDom.style.cssText += 'position: absolute;top: 0; z-index:1;height: 100%;width: 100%;pointer-events: none;';
+    this.renderDom.id = 'l7_canvaslayer';
+    canvasContainer.appendChild(this.renderDom);
+  }
+}