/**
* 渲染当前层画面到LGraphics之上
*
* @param g
* @param x
* @param y
* @param sx
* @param sy
* @param width
* @param ty
* @param isLine
* @param mapTileWidth
* @param mapTileHeight
*/
public void draw(
LGraphics g,
int x,
int y,
int sx,
int sy,
int width,
int ty,
boolean isLine,
int mapTileWidth,
int mapTileHeight) {
int tileCount = map.getTileSetCount();
int nx, ny, sheetX, sheetY, tileOffsetY;
for (int tileset = 0; tileset < tileCount; tileset++) {
TMXTileSet set = null;
for (int tx = 0; tx < width; tx++) {
nx = sx + tx;
ny = sy + ty;
if ((nx < 0) || (ny < 0)) {
continue;
}
if ((nx >= this.width) || (ny >= this.height)) {
continue;
}
if (data[nx][ny][0] == tileset) {
if (set == null) {
set = map.getTileSet(tileset);
}
sheetX = set.getTileX(data[nx][ny][1]);
sheetY = set.getTileY(data[nx][ny][1]);
tileOffsetY = set.tileHeight - mapTileHeight;
set.tiles.draw(
g, x + (tx * mapTileWidth), y + (ty * mapTileHeight) - tileOffsetY, sheetX, sheetY);
}
}
if (isLine) {
if (set != null) {
set = null;
}
map.rendered(ty, ty + sy, index);
}
}
}
/**
* 设置指定位置的瓦片ID
*
* @param x
* @param y
* @param tile
*/
public void setTileID(int x, int y, int tile) {
if (tile == 0) {
data[x][y][0] = -1;
data[x][y][1] = 0;
data[x][y][2] = 0;
} else {
TMXTileSet set = map.findTileSet(tile);
data[x][y][0] = set.index;
data[x][y][1] = tile - set.firstGID;
data[x][y][2] = tile;
}
}
/**
* 根据TMX地图描述创建一个新层
*
* @param map
* @param element
* @throws RuntimeException
*/
public TMXLayer(TMXTiledMap map, Element element) throws RuntimeException {
this.map = map;
name = element.getAttribute("name");
width = Integer.parseInt(element.getAttribute("width"));
height = Integer.parseInt(element.getAttribute("height"));
data = new int[width][height][3];
// 获得当前图层属性
Element propsElement = (Element) element.getElementsByTagName("properties").item(0);
if (propsElement != null) {
NodeList properties = propsElement.getElementsByTagName("property");
if (properties != null) {
props = new TMXProperty();
for (int p = 0; p < properties.getLength(); p++) {
Element propElement = (Element) properties.item(p);
String name = propElement.getAttribute("name");
String value = propElement.getAttribute("value");
props.setProperty(name, value);
}
}
}
Element dataNode = (Element) element.getElementsByTagName("data").item(0);
String encoding = dataNode.getAttribute("encoding");
String compression = dataNode.getAttribute("compression");
// 进行base64的压缩解码
if ("base64".equals(encoding) && "gzip".equals(compression)) {
try {
Node cdata = dataNode.getFirstChild();
char[] enc = cdata.getNodeValue().trim().toCharArray();
byte[] dec = decodeBase64(enc);
GZIPInputStream is = new GZIPInputStream(new ByteArrayInputStream(dec));
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int tileId = 0;
tileId |= is.read();
tileId |= is.read() << 8;
tileId |= is.read() << 16;
tileId |= is.read() << 24;
if (tileId == 0) {
data[x][y][0] = -1;
data[x][y][1] = 0;
data[x][y][2] = 0;
} else {
TMXTileSet set = map.findTileSet(tileId);
if (set != null) {
data[x][y][0] = set.index;
data[x][y][1] = tileId - set.firstGID;
}
data[x][y][2] = tileId;
}
}
}
} catch (IOException e) {
throw new RuntimeException("Unable to decode base64 !");
}
} else {
throw new RuntimeException(
"Unsupport tiled map type "
+ encoding
+ ","
+ compression
+ " only gzip base64 Support !");
}
}