/// <summary>
/// 移动地图
/// </summary>
/// <param name="offset">屏幕像素单位</param>
public void MoveMap(Vector2 offset)
{
//相机位置
Vector3 vector = new Vector3(offset.x, 0, offset.y);
Vector3 worldOffset = transform.TransformPoint(vector * MapFunction.GetCameraMoveScale(mMapZoomLevel));
mMapCamera.transform.position -= worldOffset;
//判断移动是否超出范围
Vector3 nextCameraPos = mMapCamera.transform.position;
Vector3 leftDownWorldPos = ScreenToWorldPoint(new Vector3(0, 0));
Vector3 rightUpWorldPos = ScreenToWorldPoint(new Vector3(Screen.width, Screen.height));
if (leftDownWorldPos.x < mWorldPosRange.x)
{
nextCameraPos.x += mWorldPosRange.x - leftDownWorldPos.x;
}
else if (mWorldPosRange.width < rightUpWorldPos.x)
{
nextCameraPos.x += mWorldPosRange.width - rightUpWorldPos.x;
}
if (leftDownWorldPos.z < mWorldPosRange.y)
{
nextCameraPos.z += mWorldPosRange.y - leftDownWorldPos.z;
}
else if (mWorldPosRange.height < rightUpWorldPos.z)
{
nextCameraPos.z += mWorldPosRange.height - rightUpWorldPos.z;
}
mMapCamera.transform.position = nextCameraPos;
//计算中心经纬度
mCenterLngLat = WorldPos2LngLat(mMapCamera.transform.position);
}
public Vector3 ScreenToWorldPoint(Vector2 screenPos)
{
double screenX = screenPos.x;
double screenY = screenPos.y;
double screenZ = MapFunction.GetCameraHeight(mMapZoomLevel);
Matrix4x4 pMatrix = mMapCamera.projectionMatrix;
//反齐次除法，求出裁剪空间坐标
double px = screenX / Screen.width;
px = (px - 0.5f) * 2f;
double py = screenY / Screen.height;
py = (py - 0.5f) * 2f;
double pz = (-screenZ - pMatrix.m23) / pMatrix.m22;
double pw = screenZ;
px *= pw;
py *= pw;
//裁剪空间到相机空间
Matrix4x4 pInverseMatrix = mMapCamera.projectionMatrix.inverse;
double vx = (pInverseMatrix.m00 * px + pInverseMatrix.m01 * py + pInverseMatrix.m02 * pz + pInverseMatrix.m03 * pw);
double vy = (pInverseMatrix.m10 * px + pInverseMatrix.m11 * py + pInverseMatrix.m12 * pz + pInverseMatrix.m13 * pw);
double vz = (pInverseMatrix.m20 * px + pInverseMatrix.m21 * py + pInverseMatrix.m22 * pz + pInverseMatrix.m23 * pw);
//观察空间到世界空间
Matrix4x4 vInverseMatrix = mMapCamera.worldToCameraMatrix.inverse;
double x = (vInverseMatrix.m00 * vx + vInverseMatrix.m01 * vy + vInverseMatrix.m02 * vz + vInverseMatrix.m03 * 1);
double y = (vInverseMatrix.m10 * vx + vInverseMatrix.m11 * vy + vInverseMatrix.m12 * vz + vInverseMatrix.m13 * 1);
double z = (vInverseMatrix.m20 * vx + vInverseMatrix.m21 * vy + vInverseMatrix.m22 * vz + vInverseMatrix.m23 * 1);
return(new Vector3((float)(x), (float)(y), (float)(z)));
}
public double Distance(TileData tileData)
{
Vector2D vector1 = MapFunction.Tile2Pixel(this);
Vector2D vector2 = MapFunction.Tile2Pixel(tileData);
return(vector1.Distance(vector2));
}
public TileData WorldPos2TileData(Vector3 worldPos, int zoom = -1)
{
if (-1 == zoom)
{
zoom = (int)mMapZoomLevel;
}
Vector2D lngLat = WorldPos2LngLat(worldPos);
return(MapFunction.LngLat2Tile(lngLat, zoom));
}
/// <summary>
/// 渲染地图
/// </summary>
public void DoRender()
{
//相机坐标
Vector3 centerPos = LngLat2WorldPos(mCenterLngLat);
//相机高度
Vector3 heightVec = new Vector3(0, (float)MapFunction.GetCameraHeight(mMapZoomLevel), 0);
Vector3 cameraPos = centerPos + heightVec;
mMapCamera.transform.position = cameraPos;
//计算相机范围
Vector3 leftDownWorldPos = ScreenToWorldPoint(new Vector3(-0.1f * Screen.width, -0.1f * Screen.height, heightVec.y));
Vector3 rightUpWorldPos = ScreenToWorldPoint(new Vector3(1.1f * Screen.width, 1.1f * Screen.height, heightVec.y));
TileData leftDownTile = WorldPos2TileData(leftDownWorldPos);
TileData rightUpTile = WorldPos2TileData(rightUpWorldPos);
List <TileData> allTileDatas = new List <TileData>();
for (int i = leftDownTile.tile.x; i <= rightUpTile.tile.x; i++)
{
for (int k = leftDownTile.tile.y; k <= rightUpTile.tile.y; k++)
{
allTileDatas.Add(new TileData((int)mMapZoomLevel, i, k));
}
}
//中心Tile
TileData centerTileData = WorldPos2TileData(centerPos);
//按照距离排序，距离近的优先加载
allTileDatas.Sort((tileData1, tileData2) => {
double distance1 = centerTileData.Distance(tileData1);
double distance2 = centerTileData.Distance(tileData2);
if (distance1.DoubleIsEqual(distance2))
{
return(0);
}
return(distance1 < distance2 ? -1 : 1);
});
for (int i = 0; i < allTileDatas.Count; i++)
{
MapTile mapTile = GetMapTile(allTileDatas[i]);
mapTile.transform.position = TileData2WorldPos(allTileDatas[i]);
}
//清理距离远的Tile
if (0 < allTileDatas.Count)
{
TileData maxDisTile = allTileDatas[allTileDatas.Count - 1];
double maxDistance = maxDisTile.Distance(centerTileData);
ClearMapTile(centerTileData, maxDistance);
}
}
public float GetTileScale()
{
return(MapFunction.GetTileScale((int)mMapZoomLevel));
}
/// <summary>
/// 当前地图的缩放比例
/// </summary>
/// <returns></returns>
public float GetMapScale()
{
return(MapFunction.GetCameraMoveScale(mMapZoomLevel));
}
public Vector3 TileData2WorldPos(TileData tileData)
{
Vector2D lngLat = MapFunction.Tile2LngLat(tileData);
return(LngLat2WorldPos(lngLat));
}
/// <summary>
/// 世界坐标转经纬度
/// </summary>
/// <param name="worldPos"></param>
/// <returns></returns>
public Vector2D WorldPos2LngLat(Vector3 worldPos)
{
Vector3 position = mTileParent.InverseTransformPoint(worldPos);
return(MapFunction.Position2LngLat(position));
}
/// <summary>
/// 经纬度转世界坐标
/// </summary>
/// <param name="lngLat"></param>
/// <returns></returns>
public Vector3 LngLat2WorldPos(Vector2D lngLat)
{
Vector3 position = MapFunction.LngLat2Position(lngLat);
return(mTileParent.TransformPoint(position));
}
/// <summary>
/// 获取Tile在场景中图片的缩放比例
/// </summary>
/// <returns></returns>
public float GetTileScale()
{
return(MapFunction.GetTileScale(zoom));
}