/// <summary>
/// Creates a polygon-based shape around a single point of a
/// random size. The radiusMultiplier is used to increase the
/// size to ensure that it connects to another shape (if that
/// is the requirement).
/// </summary>
public static IPoly CreateShape(
Junction parent,
PointF point,
float radius)
{
// Figure out the size of the square, as a radius. On each
// retry, we make it a bit bigger.
radius *= parent.Random.NextSingle(0.5f, 1.5f);
// Get a random angle
int count = parent.Random.Next(3, 7);
float angle = parent.Random.NextSingle(0, Constants.PI2);
// Create the square we are mapping
PolyDefault poly = new PolyDefault();
for (int i = 0; i < count; i++)
{
poly.Add(new PointF(
point.X + (float) Math.Cos(angle) * radius,
point.Y + (float) Math.Sin(angle) * radius));
angle += Constants.PI2 / count;
}
// Return the results
return poly;
}
/// <summary>
/// Constructs the junction node's shape and sets internal
/// structures to match the new shape.
/// </summary>
public void Create(Junction junction)
{
// Figure out the basic points by creating an array
// radials, which is determined by the random number generator.
int radialCount = junction.Random.Next(8, 32);
LinkedList<PointF> internalPoints = new LinkedList<PointF>();
// Populate the radial points
for (int i = 0; i < radialCount; i++)
{
// Create the length from a random number in meters.
float length = junction.Random.NextSingle(50, 250);
// Figure out the angle we are calculating for the
// internal shape, then use that to calculate the
// internal point. These points are relative to (0,0).
float angle = (float) Math.PI * 2 * i / radialCount;
float px = (float) Math.Cos(angle) * length;
float py = (float) Math.Sin(angle) * length;
internalPoints.Add(new PointF(px, py));
}
// TODO: Do some fractal generation
// TODO add solid clutter
// Create a polygon from the two results. The external
// then has the internal taken out of the middle to
// represent the "hollow" space of the polygon.
IPoly internalPolygon = CreatePolygon(internalPoints);
// Set the polygons in the junction
junction.InternalShape = internalPolygon;
}
public GtkTunnelerCanvas()
{
// Connect the events
Events |=
Gdk.EventMask.Button1MotionMask |
Gdk.EventMask.Button2MotionMask |
Gdk.EventMask.ButtonPressMask |
Gdk.EventMask.ButtonReleaseMask |
Gdk.EventMask.VisibilityNotifyMask |
Gdk.EventMask.PointerMotionMask |
Gdk.EventMask.PointerMotionHintMask;
ExposeEvent += OnExpose;
ConfigureEvent += OnConfigure;
ButtonReleaseEvent += OnButtonRelease;
MotionNotifyEvent += OnMotionNotify;
// Create the root node with a random seed. We also set
// the JunctionManage which triggers the update threads
// and set it for the user.
rootJunction = new Junction();
junctionManager.Junction = rootJunction;
}
/// <summary>
/// Selects a random segment factory. For a given seed, this
/// will always return the same segment.
/// </summary>
public static ISegmentFactory ChooseSegmentFactory(
Junction childJunction)
{
return new SimpleSegmentFactory();
}
/// <summary>
/// Creates a segment from a child junction to its parent.
/// </summary>
public Segment Create(
Junction child, PointF childPoint, double distance)
{
// Sanity checking
if (child.ParentJunction == null)
throw new Exception("Cannot generate with a null parent");
// Get the distance between the two points
Segment segment = new Segment();
Junction parent = child.ParentJunction;
// Add the two end points
CenterPointList points = new CenterPointList();
points.Add(new CenterPoint(0, 0));
points.Add(new CenterPoint(childPoint));
// Split apart the line
#if DEBUG
Stopwatch stopwatch = Stopwatch.StartNew();
#endif
// Stagger (fractalize) the points
Geometry.StaggerPoints(points, parent.Random,
Constants.MinimumSegmentDistance,
Constants.StaggerSegmentPasses);
#if DEBUG
// Show timing information
stopwatch.Stop();
Log.Debug("Fractal Time: {0}", stopwatch.Elapsed);
stopwatch.Reset();
stopwatch.Start();
#endif
// Once we generated a set of center points, we go through
// and add a randomly-sized and angled square to each
// point, unioning the results to get the shape of the
// entire segment.
IPoly shape = null;
float log = 0;
if (distance > 0)
log = (float) Math.Log(distance) * 10;
foreach (CenterPoint point in points)
{
// Keep track of our retries
int retry = 1;
while (true)
{
// Create a shape
IPoly p = Geometry.CreateShape(parent, point.Point,
retry * (Constants.SegmentAverageWidth - log));
// If we have no shape, this is automatically
// included.
if (shape == null)
{
shape = p;
break;
}
// We have another shape, so we want to build up
// an intersection to make sure they are touching.
if (!shape.HasIntersection(p))
{
// If there is no intersection, then we need
// to try again and make the radius range larger.
retry++;
continue;
}
// Make a union of the two shapes
IPoly union = shape.Union(p);
// See if we have two shapes
if (union.InnerPolygonCount > 1)
{
// We didn't quite reach each other
retry++;
continue;
}
// Set the new shape
shape = union;
break;
}
}
// Remove both junction shapes from this
//shape = shape.Difference(parent.InternalShape);
//shape = shape.Difference(child.InternalShape);
#if DEBUG
// Show timing information
stopwatch.Stop();
Log.Debug(" Shape Time: {0}", stopwatch.Elapsed);
stopwatch.Reset();
stopwatch.Start();
#endif
// Add the shape to the list
segment.InternalShape = shape;
// Set up the center line and optimize it
segment.CenterPoints.AddAll(points);
segment.CenterPoints.Optimize();
#if DEBUG
// Show timing information
stopwatch.Stop();
Log.Debug("Optimze Time: {0}", stopwatch.Elapsed);
#endif
// Return the results
return segment;
}
/// <summary>
/// Swaps the contents of one junction with another, moving as
/// appropriate.
/// </summary>
private void SwitchJunctionContents(
Junction oldJunction, Junction newJunction)
{
// Get our segment
Segment s = oldJunction.GetSegment(newJunction);
if (s == null)
{
throw new Exception(
"Cannot handle switching to non-continous segments");
}
PointF translate = s.ChildJunctionPoint;
// Get a list of mobiles, including the player, around the
// player.
JunctionManagerPreload oldPreload = preloadedJunctions[oldJunction];
JunctionManagerPreload newPreload = preloadedJunctions[newJunction];
if (oldPreload == null)
throw new Exception("oldPreload is null");
if (newPreload == null)
throw new Exception("newPreload is null");
IList<Mobile> list = oldPreload.Physics.GetMobiles(
State.Player.Point, Constants.OverlapConnectionDistance);
foreach (Mobile m in list)
{
// Kill them in the current engine
m.PhysicsBody.Lifetime.IsExpired = true;
oldPreload.Physics.Remove(m);
// Keep the old body and force the mobile to recreate
// it by getting the new one and then setting the
// internal state.
Body oldBody = m.PhysicsBody;
m.ClearPhysicsBody();
Body newBody = m.PhysicsBody;
newBody.State.Position.Linear.X =
oldBody.State.Position.Linear.X - translate.X;
newBody.State.Position.Linear.Y =
oldBody.State.Position.Linear.Y - translate.Y;
newBody.State.Position.Angular =
oldBody.State.Position.Angular;
newBody.State.Velocity.Linear.X =
oldBody.State.Velocity.Linear.X;
newBody.State.Velocity.Linear.Y =
oldBody.State.Velocity.Linear.Y;
newBody.State.Velocity.Angular =
oldBody.State.Velocity.Angular;
// Add it in the new engine
newPreload.Physics.Add(m);
}
}
/// <summary>
/// The internal version of the building that functions while
/// thread-safe.
/// </summary>
private void BuildConnectionsLocked()
{
// Don't bother if we have connections already
if (builtConnections)
return;
// Sanity checking
if (isBuildingConnections)
throw new Exception("Building connections is not reentrant");
isBuildingConnections = true;
// Make sure our shapes are built to keep the order consistent
BuildShapes();
// Keep track of the overlap detection code
LinkedList<IPoly> overlaps = new LinkedList<IPoly>();
// Process the parent element
if (ParentJunction != null)
{
// Find our input segment
Segment ps = ParentJunction.GetSegment(this);
if (ps == null)
throw new Exception("We got a null segment from parent");
// Add the parent segment with swapped directions
ps = ps.Swap();
segments.Add(ps);
// Add to the overlap, but don't bother checking (we
// are guarenteed to the first).
CheckOverlapIntersection(overlaps, ps);
}
// We want to create a random number of connections
int connectionCount = Random.Next(
Constants.BuildMinimumConnections,
Constants.BuildMaximumConnections);
// Go through each connection
for (int i = 0; i < connectionCount; i++)
{
// Build up a connection in a random direction
float angle = Random.NextSingle(0, 2 * (float) Math.PI);
float length = Random.NextSingle(
Constants.MinimumConnectionDistance,
Constants.MaximumConnectionDistance);
// Junction points are relative to the parent node
PointF point = new PointF(
(float) Math.Cos(angle) * length,
(float) Math.Sin(angle) * length);
// Create a new junction at this point
Junction junction = new Junction(Random.Next());
junction.ParentJunction = this;
junction.BuildShapes();
// Get the segment factory and create the segment
ISegmentFactory isf =
FactoryManager.ChooseSegmentFactory(junction);
Segment segment = isf.Create(junction, point, Distance);
segment.ParentJunction = this;
segment.ChildJunction = junction;
segment.ChildJunctionPoint = point;
// Set the junction's distance
junction.Distance =
Distance + segment.CenterPoints.MaximumRelativeDistance;
// Check and add the overlap
if (CheckOverlapIntersection(overlaps, segment))
{
// We intersect
Log.Debug("Rejection because segments overlap");
continue;
}
// Add some clutter
IClutterFactory icf =
FactoryManager.ChooseClutterFactory(Random);
icf.Create(segment);
// Add it to the segments
segments.Add(segment);
}
// Create the physics shapes
if (GeneratePhysics)
{
#if DEBUG
Stopwatch stopwatch = Stopwatch.StartNew();
#endif
BuildCombinedShape();
#if DEBUG
// Show timing information
stopwatch.Stop();
Log.Debug(" Physics Shape: {0}", stopwatch.Elapsed);
stopwatch.Reset();
stopwatch.Start();
#endif
CreateJunctionPhysics(0);
#if DEBUG
// Show timing information
stopwatch.Stop();
Log.Debug("Physics Creation: {0}", stopwatch.Elapsed);
#endif
}
// We are done
builtConnections = true;
isBuildingConnections = false;
}
/// <summary>
/// Retrieves a segment based on the child junction.
/// </summary>
public Segment GetSegment(Junction junction)
{
foreach (Segment s in segments)
if (s.ChildJunction == junction)
return s;
return null;
}
/// <summary>
/// Creates a new preloaded stub and prepares for the
/// background processing.
/// </summary>
public JunctionManagerPreload(Junction junction)
{
this.junction = junction;
this.physics = new Physics();
}
/// <summary>
/// Constructs the junction node's shape and sets internal
/// structures to match the new shape.
/// </summary>
public void Create(Junction junction)
{
// We always start with one shape
IPoly shape = Geometry.CreateShape(junction, PointF.Empty,
Constants.JunctionAverageWidth);
// Figure out the basic points by creating an array
// simples, which is determined by the random number generator.
int simpleCount = junction.Random.Next(8, 32);
// Populate the simple points
for (int i = 0; i < simpleCount; i++)
{
// Create the length from a random number in meters.
float length = junction.Random
.NextSingle(0, Constants.JunctionAverageWidth);
// Figure out the angle we are calculating for the
// internal shape, then use that to calculate the
// internal point. These points are relative to (0,0).
float angle = (float) Math.PI * 2 * i / simpleCount;
float px = (float) Math.Cos(angle) * length;
float py = (float) Math.Sin(angle) * length;
int retry = 0;
while (true)
{
// Create a shape at that point
IPoly p = Geometry.CreateShape(junction,
new PointF(px, py),
retry * Constants.JunctionAverageWidth);
// If we have no shape, this is automatically
// included.
if (shape == null)
{
shape = p;
break;
}
// We have another shape, so we want to build up
// an intersection to make sure they are touching.
IPoly intersect = shape.Intersection(p);
if (intersect.PointCount == 0)
{
// If there is no intersection, then we need
// to try again and make the radius range larger.
retry++;
continue;
}
// Make a union of the two shapes
IPoly union = shape.Union(p);
// See if we have two shapes
if (union.InnerPolygonCount > 1)
{
// We didn't quite reach each other
retry++;
continue;
}
// Set the new shape
shape = union;
break;
}
}
// TODO: Do some fractal generation
// TODO add solid clutter
// Set the polygons in the junction
junction.InternalShape = shape;
}
/// <summary>
/// Renders out a single junction to the canvas.
/// </summary>
private void RenderJunction(
Context g, Junction junction,
PointF point,
int recursion)
{
// Get the shape we need to draw and draw it
IPoly poly = junction.InternalShape;
RenderPolygon(g, poly, point, new Color(0, 0, 0));
// See if we are recursive
if (recursion-- > 0)
{
// Got through the shapes
foreach (Segment s in junction.Segments)
{
// Render the junction
RenderJunction(g,
s.ChildJunction,
s.ChildJunctionPoint,
recursion);
}
// Got through the shapes
foreach (Segment s in junction.Segments)
{
// Render the segment between the two
RenderSegment(g, s);
// Render and save the junction handles
RenderJunctionHandle(
g,
s.ChildJunctionPoint,
s.ChildJunction
== junctionManager.Junction.ParentJunction,
s.ChildJunction == hoverJunction);
// Save the point
junctionHandles.Add(s);
}
}
}
/// <summary>
/// Rebuilds the internal junction.
/// </summary>
public void Rebuild()
{
rootJunction = new Junction();
junctionManager.Junction = rootJunction;
QueueDraw();
}
/// <summary>
/// Triggered when the mouse is moved around the widget.
/// </summary>
public void OnMotionNotify(object sender, MotionNotifyEventArgs args)
{
// Get the x and y coordinates
double x, y;
if (args.Event.IsHint)
{
Gdk.ModifierType m;
int ix, iy;
args.Event.Window.GetPointer(out ix, out iy, out m);
x = ix;
y = iy;
}
else
{
x = args.Event.X;
y = args.Event.Y;
}
double hs = handleSize / scale;
x = x / scale - cx;
y = y / scale - cy;
// Go through the list and see if we are near a handle
hoverJunction = null;
foreach (Segment s in junctionHandles)
{
// Get the point, swapping it if needed
Junction jn = s.ChildJunction;
PointF p = s.ChildJunctionPoint;
// See if we are in range
if (p.X - hs <= x && x <= p.X + hs &&
p.Y - hs <= y && y <= p.Y + hs)
{
hoverJunction = jn;
break;
}
}
// Force the drawing
QueueDraw();
}