public void PopulateFrom(CCTileMap tileMap)
{
//得到瓦片地图里面的瓦片信息，比如说哪些瓦片可以与entity接触，具体是瓦片的哪个方向的面可以接触
//每个小瓦片的边长加上0.5的误差
tileDimension = (int)(tileMap.TileTexelSize.Width + .5f);
TileMapPropertyFinder finder = new TileMapPropertyFinder (tileMap);
foreach (var propertyLocation in finder.GetPropertyLocations())
{
//如果在这个位置的瓦片是一个固体
if (propertyLocation.Properties.ContainsKey ("SolidCollision"))
{
//worldX worldY 是每个瓦片的中心的坐标
float centerX = propertyLocation.WorldX;
float centerY = propertyLocation.WorldY;
//得到每个小瓦片的左边界和下边界
float left = centerX - tileDimension/2.0f;
float bottom = centerY - tileDimension/2.0f;
//在那个点构造一个小瓦片
RectWithDirection rectangle = new RectWithDirection {
Left = left,
Bottom = bottom,
Width = tileDimension,
Height = tileDimension
};
//得到地图上所有的固体小块
collisions.Add (rectangle);
}
}
// Sort by XAxis to speed future searches:
//collisions是把整个瓦片地图按每个瓦片的左边的坐标进行排序的list
//在每一个左边坐标有一列的瓦片
//debug看一下
collisions = collisions.OrderBy(item=>item.Left).ToList();
// now let's adjust the directions that these point
//调整每个小块的角度
for (int i = 0; i < collisions.Count; i++)
{
var rect = collisions [i];
// By default rectangles can reposition objects in all directions:
int valueToAssign = (int)Directions.All; //15
float centerX = rect.CenterX;
float centerY = rect.CenterY;
// If there are collisions on the sides, then this
// rectangle can no longer repositon objects in that direction.
// 一开始小瓦片的方向valueToAssign可能是所有的方向，每次减去一种不可能的方向值，最后得到的就是正确的方向的值的和
//direction是这个实体瓦片暴露在外，可以与entity接触的方向
//比如说瓦片地图里的地面，方向就为up
if (HasCollisionAt (centerX - tileDimension, centerY))
{
valueToAssign -= (int)Directions.Left;
}
if (HasCollisionAt (centerX + tileDimension, centerY))
{
valueToAssign -= (int)Directions.Right;
}
if (HasCollisionAt (centerX, centerY + tileDimension))
{
valueToAssign -= (int)Directions.Up;
}
if (HasCollisionAt (centerX, centerY - tileDimension))
{
valueToAssign -= (int)Directions.Down;
}
rect.Directions = (Directions)valueToAssign;
//更新瓦片列表中的瓦片的方向
collisions [i] = rect;
}
for (int i = collisions.Count - 1; i > -1; i--)
{
//经过筛选后，遍历删除那些没有方向的瓦片
if (collisions [i].Directions == Directions.None)
{
collisions.RemoveAt (i);
}
}
}
private void ProcessTileProperties()
{
TileMapPropertyFinder finder = new TileMapPropertyFinder (currentLevel);
foreach (var propertyLocation in finder.GetPropertyLocations())
{
var properties = propertyLocation.Properties;
if (properties.ContainsKey ("EntityType"))
{
float worldX = propertyLocation.WorldX;
float worldY = propertyLocation.WorldY;
if (properties.ContainsKey ("YOffset"))
{
string yOffsetAsString = properties ["YOffset"];
float yOffset = 0;
float.TryParse (yOffsetAsString, out yOffset);
worldY += yOffset;
}
bool created = TryCreateEntity (properties ["EntityType"], worldX, worldY);
if (created)
{
propertyLocation.Layer.RemoveTile (propertyLocation.TileCoordinates);
}
}
else if (properties.ContainsKey ("RemoveMe"))
{
propertyLocation.Layer.RemoveTile (propertyLocation.TileCoordinates);
}
}
touchScreen = new TouchScreenInput(gameplayLayer);
}
public void PopulateFrom(CCTileMap tileMap)
{
tileDimension = (int)(tileMap.TileTexelSize.Width + .5f);
TileMapPropertyFinder finder = new TileMapPropertyFinder (tileMap);
foreach (var propertyLocation in finder.GetPropertyLocations())
{
if (propertyLocation.Properties.ContainsKey ("SolidCollision"))
{
float centerX = propertyLocation.WorldX;
float centerY = propertyLocation.WorldY;
float left = centerX - tileDimension/2.0f;
float bottom = centerY - tileDimension/2.0f;
RectWithDirection rectangle = new RectWithDirection {
Left = left,
Bottom = bottom,
Width = tileDimension,
Height = tileDimension
};
collisions.Add (rectangle);
}
}
// Sort by XAxis to speed future searches:
collisions = collisions.OrderBy(item=>item.Left).ToList();
// now let's adjust the directions that these point
for (int i = 0; i < collisions.Count; i++)
{
var rect = collisions [i];
// By default rectangles can reposition objects in all directions:
int valueToAssign = (int)Directions.All;
float centerX = rect.CenterX;
float centerY = rect.CenterY;
// If there are collisions on the sides, then this
// rectangle can no longer repositon objects in that direction.
if (HasCollisionAt (centerX - tileDimension, centerY))
{
valueToAssign -= (int)Directions.Left;
}
if (HasCollisionAt (centerX + tileDimension, centerY))
{
valueToAssign -= (int)Directions.Right;
}
if (HasCollisionAt (centerX, centerY + tileDimension))
{
valueToAssign -= (int)Directions.Up;
}
if (HasCollisionAt (centerX, centerY - tileDimension))
{
valueToAssign -= (int)Directions.Down;
}
rect.Directions = (Directions)valueToAssign;
collisions [i] = rect;
}
for (int i = collisions.Count - 1; i > -1; i--)
{
if (collisions [i].Directions == Directions.None)
{
collisions.RemoveAt (i);
}
}
}
private void ProcessTileProperties()
{
TileMapPropertyFinder finder = new TileMapPropertyFinder (currentLevel);
//遍历每一个瓦片
foreach (var propertyLocation in finder.GetPropertyLocations())
{
var properties = propertyLocation.Properties;
if (properties.ContainsKey ("EntityType"))
{
float worldX = propertyLocation.WorldX;
float worldY = propertyLocation.WorldY;
//加上offset
if (properties.ContainsKey ("YOffset"))
{
string yOffsetAsString = properties ["YOffset"];
float yOffset = 0;
float.TryParse (yOffsetAsString, out yOffset);
worldY += yOffset;
}
//如果这个瓦片是entity，则添加到游戏layer
bool created = TryCreateEntity (properties ["EntityType"], worldX, worldY);
if (created)
{
//如果这个瓦片是entity，且在layer中添加成功的话,在这个layer中移除这个瓦片
propertyLocation.Layer.RemoveTile (propertyLocation.TileCoordinates);
}
}
else if (properties.ContainsKey ("RemoveMe"))
{
propertyLocation.Layer.RemoveTile (propertyLocation.TileCoordinates);
}
}
//相当于玩家可以开始操作
input = new TouchScreenInput(gameplayLayer);
}