/**
* If the PSH file contains a line starting with {@link PolygonRegionParameters#texturePrefix
* params.texturePrefix}, an {@link AssetDescriptor} for the file referenced on that line will be
* added to the returned Array. Otherwise a sibling of the given file with the same name and the
* first found extension in {@link PolygonRegionParameters#textureExtensions
* params.textureExtensions} will be used. If no suitable file is found, the returned Array will
* be empty.
*/
@Override
public Array<AssetDescriptor> getDependencies(
String fileName, FileHandle file, PolygonRegionParameters params) {
if (params == null) params = defaultParameters;
String image = null;
try {
BufferedReader reader = file.reader(params.readerBuffer);
for (String line = reader.readLine(); line != null; line = reader.readLine())
if (line.startsWith(params.texturePrefix)) {
image = line.substring(params.texturePrefix.length());
break;
}
reader.close();
} catch (IOException e) {
throw new GdxRuntimeException("Error reading " + fileName, e);
}
if (image == null && params.textureExtensions != null)
for (String extension : params.textureExtensions) {
FileHandle sibling = file.sibling(file.nameWithoutExtension().concat("." + extension));
if (sibling.exists()) image = sibling.name();
}
if (image != null) {
Array<AssetDescriptor> deps = new Array<AssetDescriptor>(1);
deps.add(new AssetDescriptor<Texture>(file.sibling(image), Texture.class));
return deps;
}
return null;
}
public Element parse(FileHandle file) throws IOException {
try {
return parse(file.reader("UTF-8"));
} catch (Exception ex) {
throw new SerializationException("Error parsing file: " + file, ex);
}
}
/**
* Loads a PolygonRegion from a PSH (Polygon SHape) file. The PSH file format defines the polygon
* vertices before triangulation:
*
* <p>s 200.0, 100.0, ...
*
* <p>Lines not prefixed with "s" are ignored. PSH files can be created with external tools, eg:
* <br>
* https://code.google.com/p/libgdx-polygoneditor/ <br>
* http://www.codeandweb.com/physicseditor/
*
* @param file file handle to the shape definition file
*/
public PolygonRegion load(TextureRegion textureRegion, FileHandle file) {
BufferedReader reader = file.reader(256);
try {
while (true) {
String line = reader.readLine();
if (line == null) break;
if (line.startsWith("s")) {
// Read shape.
String[] polygonStrings = line.substring(1).trim().split(",");
float[] vertices = new float[polygonStrings.length];
for (int i = 0, n = vertices.length; i < n; i++)
vertices[i] = Float.parseFloat(polygonStrings[i]);
// It would probably be better if PSH stored the vertices and triangles, then we don't
// have to triangulate here.
return new PolygonRegion(
textureRegion, vertices, triangulator.computeTriangles(vertices).toArray());
}
}
} catch (IOException ex) {
throw new GdxRuntimeException("Error reading polygon shape file: " + file, ex);
} finally {
StreamUtils.closeQuietly(reader);
}
throw new GdxRuntimeException("Polygon shape not found: " + file);
}
