/**
* Requires vn to point to a relation element. From there it iterates over all matches of the ap.
* Puts an empty list for each referenced way.
*/
private List<Tuple2<WayRole, Long>> extractWayRefs(VTDNav vn, Hashtable<Long, List<Long>> ways)
throws NavException, XPathEvalException {
vn.push();
List<Tuple2<WayRole, Long>> refs = new ArrayList<>();
for (int j = MEMBER_WAY_PATH.evalXPath(); j != -1; j = MEMBER_WAY_PATH.evalXPath()) {
long ref = Long.parseLong(vn.toString(vn.getAttrVal("ref")));
String roleAsString = vn.toString(vn.getAttrVal("role")).toLowerCase();
WayRole role;
switch (roleAsString) {
case "inner":
role = WayRole.INNER;
break;
case "outer":
role = WayRole.OUTER;
break;
default:
continue;
}
refs.add(Tuple.tuple(role, ref));
ways.put(ref, Collections.emptyList());
}
MEMBER_WAY_PATH.resetXPath();
vn.pop();
return refs;
}
public final void addShields(int amount) {
shields += amount;
if (shields > 255) shields = 255;
else if (shields > 50) {
if (autoPilot.getStatus() == AutoPilot.SystemStatus.DAMAGED) {
autoPilot.setStatus(AutoPilot.SystemStatus.OFF);
}
}
}
@Override
public void update() {
if (autoPilot.getStatus() == AutoPilot.SystemStatus.ON) {
autoPilot.update();
}
switch (rotation) {
case RIGHT:
direction.x = (direction.x * cos) - (direction.y * sin);
direction.y = (direction.x * sin) + (direction.y * cos);
break;
case LEFT:
direction.x = (direction.x * cos) + (direction.y * sin);
direction.y = -(direction.x * sin) + (direction.y * cos);
break;
}
direction = direction.direction();
if (boosting) {
vel.add(direction);
vel.x = (Math.abs(vel.x) > 35) ? Math.signum(vel.x) * 35 : vel.x;
vel.y = (Math.abs(vel.y) > 35) ? Math.signum(vel.y) * 35 : vel.y;
} else if (breaking) {
slow();
}
pos.x += vel.x;
pos.y += vel.y;
rectangle.setLocation(pos.getPoint());
// bounds checking:
if (pos.x < 0) {
pos.x = ViewFrame.size.width - 1;
} else if (pos.x > ViewFrame.size.width - 1) {
pos.x = 0;
}
if (pos.y < 0) {
pos.y = ViewFrame.size.height - 1;
} else if (pos.y > ViewFrame.size.height - 1) {
pos.y = 0;
}
if (firing) {
weapon.fire();
displayAmmo();
}
}
private void extractReferencedWays(
VTDNav vn, Hashtable<Long, List<Long>> ways, Hashtable<Long, Point2D> nodes)
throws XPathEvalException, NavException {
vn.push();
for (int i = WAY_PATH.evalXPath(); i != -1; i = WAY_PATH.evalXPath()) {
long id = Long.parseLong(vn.toString(vn.getAttrVal("id")));
// By checking that we already referenced the id we can reduce memory pressure
if (ways.containsKey(id)) {
ways.put(id, extractNodeRefs(vn, nodes));
}
}
vn.pop();
}
/**
* Requires vn to point to a way element. From there it iterates over all matches of the ap. Puts
* a dummy point into nodes for every node it finds.
*/
private List<Long> extractNodeRefs(VTDNav vn, Hashtable<Long, Point2D> nodes)
throws NavException, XPathEvalException {
vn.push();
List<Long> refs = new ArrayList<>();
for (int j = NODE_REF_PATH.evalXPath(); j != -1; j = NODE_REF_PATH.evalXPath()) {
long ref = Long.parseLong(vn.toString(j + 1));
refs.add(ref);
nodes.put(ref, new Point2D(0, 0));
}
NODE_REF_PATH.resetXPath();
vn.pop();
return refs;
}
private List<List<Long>> extractWaysOfBuildings(VTDNav vn, Hashtable<Long, Point2D> nodes)
throws XPathEvalException, NavException {
vn.push();
List<List<Long>> ways = new ArrayList<>();
for (int i = BUILDING_WAY_PATH.evalXPath(); i != -1; i = BUILDING_WAY_PATH.evalXPath()) {
// The lambda will put in a dummy value for each encountered node,
// so that we know later which nodes we need to parse.
ways.add(extractNodeRefs(vn, nodes));
}
vn.pop();
BUILDING_WAY_PATH.resetXPath();
return ways;
}
private List<List<Tuple2<WayRole, Long>>> extractWayRefsOfMultipolygons(
VTDNav vn, Hashtable<Long, List<Long>> ways) throws NavException, XPathEvalException {
vn.push();
List<List<Tuple2<WayRole, Long>>> multipolygons = new ArrayList<>();
for (int i = BUILDING_MULTIPOLYGON_PATH.evalXPath();
i != -1;
i = BUILDING_MULTIPOLYGON_PATH.evalXPath()) {
// For an explanation for the lambda see extractWaysOfBuildings
multipolygons.add(extractWayRefs(vn, ways));
}
vn.pop();
BUILDING_WAY_PATH.resetXPath();
return multipolygons;
}
public final void damage(int amount) {
shields -= amount;
if (shields < 0) shields = 0;
wasHit = true;
if (shields < 50) {
autoPilot.setStatus(AutoPilot.SystemStatus.DAMAGED);
}
ViewFrame.getInstance().setHealth(shields);
}
private void extractReferencedNodes(VTDNav vn, Hashtable<Long, Point2D> nodes)
throws XPathEvalException, NavException {
vn.push();
for (int i = NODE_PATH.evalXPath(); i != -1; i = NODE_PATH.evalXPath()) {
long id = Long.parseLong(vn.toString(vn.getAttrVal("id")));
// By checking that we already referenced the id we can reduce memory pressure
if (nodes.containsKey(id)) {
nodes.put(
id,
new Point2D(
Double.parseDouble(vn.toString(vn.getAttrVal("lon"))) * (1 << 10),
Double.parseDouble(vn.toString(vn.getAttrVal("lat"))) * (1 << 10)));
}
}
// Make sure we have all referenced nodes extracted
// assert !nodes.containsValue(DUMMY_POINT);
vn.pop();
}
public OSMGeometryParser() {
try {
NODE_PATH.selectXPath("/osm/node");
NODE_REF_PATH.selectXPath("nd/@ref");
BUILDING_WAY_PATH.selectXPath("/osm/way[./tag[@k='building']]");
BUILDING_MULTIPOLYGON_PATH.selectXPath(
"/osm/relation[./tag[@k='type' and @v='multipolygon'] and ./tag/@k='building']");
MEMBER_WAY_PATH.selectXPath("member[@type='way']");
WAY_PATH.selectXPath("/osm/way");
} catch (XPathParseException e) {
e.printStackTrace();
}
}
public List<Triangle> parseFile(InputStream is) {
try {
VTDGen vg = new VTDGen();
vg.setDoc(IOUtils.toByteArray(is));
vg.parse(false);
VTDNav vn = vg.getNav();
NODE_PATH.resetXPath();
NODE_PATH.bind(vn); // This is important state for the later method calls!
NODE_REF_PATH.resetXPath();
NODE_REF_PATH.bind(vn);
BUILDING_WAY_PATH.resetXPath();
BUILDING_WAY_PATH.bind(vn);
BUILDING_MULTIPOLYGON_PATH.resetXPath();
BUILDING_MULTIPOLYGON_PATH.bind(vn);
MEMBER_WAY_PATH.resetXPath();
MEMBER_WAY_PATH.bind(vn);
WAY_PATH.resetXPath();
WAY_PATH.bind(vn);
// A hash from node ids to actual node positions
Hashtable<Long, Point2D> nodes = new Hashtable<>();
// A hash from way refs referenced from multipolygons to their actual list of node refs
Hashtable<Long, List<Long>> multipolygonWays = new Hashtable<>();
// The following call initializes accessed node refs in nodes to a dummy value.
List<List<Long>> buildingWays = extractWaysOfBuildings(vn, nodes);
// The following call initializes accessed way refs from multipolygons to a dummy value.
List<List<Tuple2<WayRole, Long>>> multipolygonWayRefs =
extractWayRefsOfMultipolygons(vn, multipolygonWays);
// This will extract all referenced multipolygon multipolygonWays, excluding the building
// multipolygonWays
// Also adds referenced nodes to nodes
extractReferencedWays(vn, multipolygonWays, nodes);
// This will extract all referenced nodes, but no more.
extractReferencedNodes(vn, nodes);
// Finally build the polygon list by following the node refs in wayRefs.
// Triangulate each polygon and return the flattened list of triangles.
// This way, poly2tri's types will not leak out of this class and we operate
// on triangles anyway.
return buildPolygons(nodes, buildingWays, multipolygonWays, multipolygonWayRefs)
.flatMap(
p -> {
try {
p.ComplexToSimplePolygon();
EarClipping ec = new EarClipping(p.SimplePolygon);
return ec.Triangulation().stream();
} catch (RuntimeException ignored) {
}
return Stream.empty();
})
.toList();
} catch (XPathEvalException | NavException | IOException | ParseException e) {
e.printStackTrace();
return new ArrayList<>();
}
}
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode();
if (keyCode == KeyEvent.VK_P) {
ViewFrame.getInstance().pause();
return;
} else if (keyCode == KeyEvent.VK_A) {
SystemStatus status = autoPilot.getStatus();
switch (status) {
case ON:
autoPilot.setStatus(AutoPilot.SystemStatus.OFF);
boosting = firing = false;
rotation = Rotation.NONE;
break;
case OFF:
autoPilot.setStatus(AutoPilot.SystemStatus.ON);
break;
default:
return;
}
return;
}
if (autoPilot.getStatus() == AutoPilot.SystemStatus.ON) {
return;
}
switch (keyCode) {
case KeyEvent.VK_UP:
{
if (!boosting) {
setBoosting(true);
}
break;
}
case KeyEvent.VK_DOWN:
{
if (!breaking) {
setBreaking(true);
}
break;
}
case KeyEvent.VK_LEFT:
{
setRotation(Player.Rotation.LEFT);
break;
}
case KeyEvent.VK_RIGHT:
{
setRotation(Player.Rotation.RIGHT);
break;
}
case KeyEvent.VK_D:
{
cycleTarget(true);
break;
}
case KeyEvent.VK_Q:
{
cycleWeapon(-1);
break;
}
case KeyEvent.VK_E:
{
cycleWeapon(1);
break;
}
case KeyEvent.VK_SPACE:
firing = true;
break;
case KeyEvent.VK_R:
reload();
break;
}
}