/**
* 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);
}
/**
* Sets polygon with repeating texture region, the size of repeating grid is equal to region size
*
* @param region - region to repeat
* @param vertices - cw vertices of polygon
* @param density - number of regions per polygon width bound
*/
public void setPolygon(TextureRegion region, float[] vertices, float density) {
this.region = region;
vertices = offset(vertices);
Polygon polygon = new Polygon(vertices);
Polygon tmpPoly = new Polygon();
Polygon intersectionPoly = new Polygon();
EarClippingTriangulator triangulator = new EarClippingTriangulator();
int idx;
Rectangle boundRect = polygon.getBoundingRectangle();
if (density == -1) density = boundRect.getWidth() / region.getRegionWidth();
float regionAspectRatio = (float) region.getRegionHeight() / (float) region.getRegionWidth();
cols = (int) (Math.ceil(density));
gridWidth = boundRect.getWidth() / density;
gridHeight = regionAspectRatio * gridWidth;
rows = (int) Math.ceil(boundRect.getHeight() / gridHeight);
for (int col = 0; col < cols; col++) {
for (int row = 0; row < rows; row++) {
float[] verts = new float[8];
idx = 0;
verts[idx++] = col * gridWidth;
verts[idx++] = row * gridHeight;
verts[idx++] = (col) * gridWidth;
verts[idx++] = (row + 1) * gridHeight;
verts[idx++] = (col + 1) * gridWidth;
verts[idx++] = (row + 1) * gridHeight;
verts[idx++] = (col + 1) * gridWidth;
verts[idx] = (row) * gridHeight;
tmpPoly.setVertices(verts);
Intersector.intersectPolygons(polygon, tmpPoly, intersectionPoly);
verts = intersectionPoly.getVertices();
if (verts.length > 0) {
parts.add(snapToGrid(verts));
ShortArray arr = triangulator.computeTriangles(verts);
indices.add(arr.toArray());
} else {
// adding null for key consistancy, needed to get col/row from key
// the other alternative is to make parts - IntMap<FloatArray>
parts.add(null);
}
}
}
buildVertices();
}
/**
* Creates an array of PolySpatials based on fixture information from the scene. Note that
* fixtures create aligned textures.
*
* @param scene
*/
private void createPolySpatialsFromRubeFixtures(RubeScene scene) {
Array<Body> bodies = scene.getBodies();
EarClippingTriangulator ect = new EarClippingTriangulator();
if ((bodies != null) && (bodies.size > 0)) {
polySpatials = new Array<PolySpatial>();
Vector2 bodyPos = new Vector2();
// for each body in the scene...
for (int i = 0; i < bodies.size; i++) {
Body body = bodies.get(i);
bodyPos.set(body.getPosition());
Array<Fixture> fixtures = body.getFixtureList();
if ((fixtures != null) && (fixtures.size > 0)) {
// for each fixture on the body...
for (int j = 0; j < fixtures.size; j++) {
Fixture fixture = fixtures.get(j);
String textureName = (String) scene.getCustom(fixture, "TextureMask", null);
if (textureName != null) {
String textureFileName = "data/" + textureName;
Texture texture = textureMap.get(textureFileName);
TextureRegion textureRegion = null;
if (texture == null) {
texture = new Texture(textureFileName);
texture.setWrap(TextureWrap.Repeat, TextureWrap.Repeat);
textureMap.put(textureFileName, texture);
textureRegion = new TextureRegion(texture);
textureRegionMap.put(texture, textureRegion);
} else {
textureRegion = textureRegionMap.get(texture);
}
// only handle polygons at this point -- no chain, edge, or circle fixtures.
if (fixture.getType() == Shape.Type.Polygon) {
PolygonShape shape = (PolygonShape) fixture.getShape();
int vertexCount = shape.getVertexCount();
float[] vertices = new float[vertexCount * 2];
// static bodies are texture aligned and do not get drawn based off of the related
// body.
if (body.getType() == BodyType.StaticBody) {
for (int k = 0; k < vertexCount; k++) {
shape.getVertex(k, mTmp);
mTmp.rotate(body.getAngle() * MathUtils.radiansToDegrees);
mTmp.add(
bodyPos); // convert local coordinates to world coordinates to that textures
// are
// aligned
vertices[k * 2] = mTmp.x * PolySpatial.PIXELS_PER_METER;
vertices[k * 2 + 1] = mTmp.y * PolySpatial.PIXELS_PER_METER;
}
short[] triangleIndices = ect.computeTriangles(vertices).toArray();
PolygonRegion region =
new PolygonRegion(textureRegion, vertices, triangleIndices);
PolySpatial spatial = new PolySpatial(region, Color.WHITE);
polySpatials.add(spatial);
} else {
// all other fixtures are aligned based on their associated body.
for (int k = 0; k < vertexCount; k++) {
shape.getVertex(k, mTmp);
vertices[k * 2] = mTmp.x * PolySpatial.PIXELS_PER_METER;
vertices[k * 2 + 1] = mTmp.y * PolySpatial.PIXELS_PER_METER;
}
short[] triangleIndices = ect.computeTriangles(vertices).toArray();
PolygonRegion region =
new PolygonRegion(textureRegion, vertices, triangleIndices);
PolySpatial spatial = new PolySpatial(region, body, Color.WHITE);
polySpatials.add(spatial);
}
} else if (fixture.getType() == Shape.Type.Circle) {
CircleShape shape = (CircleShape) fixture.getShape();
float radius = shape.getRadius();
int vertexCount = (int) (12f * radius);
float[] vertices = new float[vertexCount * 2];
System.out.println("SpatialFactory: radius: " + radius);
if (body.getType() == BodyType.StaticBody) {
mTmp3.set(shape.getPosition());
for (int k = 0; k < vertexCount; k++) {
// set the initial position
mTmp.set(radius, 0);
// rotate it by 1/vertexCount * k
mTmp.rotate(360f * k / vertexCount);
// add it to the position.
mTmp.rotate(body.getAngle() * MathUtils.radiansToDegrees);
mTmp.add(mTmp3);
mTmp.add(
bodyPos); // convert local coordinates to world coordinates to that textures
// are aligned
vertices[k * 2] = mTmp.x * PolySpatial.PIXELS_PER_METER;
vertices[k * 2 + 1] = mTmp.y * PolySpatial.PIXELS_PER_METER;
}
short[] triangleIndices = ect.computeTriangles(vertices).toArray();
PolygonRegion region =
new PolygonRegion(textureRegion, vertices, triangleIndices);
PolySpatial spatial = new PolySpatial(region, Color.WHITE);
polySpatials.add(spatial);
} else {
mTmp3.set(shape.getPosition());
for (int k = 0; k < vertexCount; k++) {
// set the initial position
mTmp.set(radius, 0);
// rotate it by 1/vertexCount * k
mTmp.rotate(360f * k / vertexCount);
// add it to the position.
mTmp.add(mTmp3);
vertices[k * 2] = mTmp.x * PolySpatial.PIXELS_PER_METER;
vertices[k * 2 + 1] = mTmp.y * PolySpatial.PIXELS_PER_METER;
}
short[] triangleIndices = ect.computeTriangles(vertices).toArray();
PolygonRegion region =
new PolygonRegion(textureRegion, vertices, triangleIndices);
PolySpatial spatial = new PolySpatial(region, body, Color.WHITE);
polySpatials.add(spatial);
}
}
}
}
}
}
}
}