/// <summary>
/// Add a line segment.
/// </summary>
/// <param name="start">Start position</param>
/// <param name="end">End position</param>
public void AddSegment(Vector2 start, Vector2 end)
{
var segment = new SegmentShape2D()
{
A = start,
B = end
};
var shape = new CollisionShape2D()
{
Shape = segment
};
segments.Add(segment);
shapes.Add(shape);
AddChild(shape);
var lineSprite = new SimpleLineSprite()
{
PositionA = GlobalPosition + segment.A,
PositionB = GlobalPosition + segment.B,
Modulate = BaseColor,
Width = 2
};
lineSprites.Add(lineSprite);
AddChild(lineSprite);
}
public override void UpdateTransforms()
{
SegmentShape2D segment = _data.Segment;
GizmoLineSlider2D slider = _data.Slider;
segment.StartPoint = slider.StartPosition;
segment.SetEndPtFromStart(slider.Direction, slider.GetRealLength());
}
/**
* Handles inputs for the simulation
*/
public override void _Input(InputEvent inputEvent)
{
//Adds a liquid particle to the mouse's position if the left mouse button is pressed
if (Input.IsActionPressed("add_liquid_particle") && this._framesUntilNextLiquidParticleCreation == 0)
{
var liquidParticleInstance = (Node2D)this._liquidParticleScene.Instance();
liquidParticleInstance.Position = this.GetViewport().GetMousePosition();
this.AddChild(liquidParticleInstance);
this._liquidParticles.Add((LiquidParticle)liquidParticleInstance);
this._framesUntilNextLiquidParticleCreation = 5;
}
//If the right mouse button is being pressed, creates a blocker from the start of the press to the end of the press
if (Input.IsActionPressed("add_blocker"))
{
if (this._blockerSegmentBeingPlaced == null)
{
this._blockerSegmentBeingPlaced = new SegmentShape2D {
A = this.GetViewport().GetMousePosition(),
B = this.GetViewport().GetMousePosition()
};
var body = new StaticBody2D();
body.AddChild(new CollisionShape2D {
Shape = this._blockerSegmentBeingPlaced
});
this.AddChild(body);
this._blockers.Add(this._blockerSegmentBeingPlaced);
this.Update();
}
else
{
this._blockerSegmentBeingPlaced.B = this.GetViewport().GetMousePosition();
this.Update();
}
}
else
{
this._blockerSegmentBeingPlaced = null;
this.Update();
}
//Removes all children if the escape key is pressed
if (Input.IsActionPressed("clear_everything"))
{
foreach (var child in this.GetChildren())
{
this.RemoveChild((Node)child);
}
this._liquidParticles.Clear();
this._springs.Clear();
this._blockers.Clear();
this.Update();
}
}
/// <summary>
/// Converts an EdgeCollection to a List of SegmentShape2Ds that make up that EdgeCollection,
/// whether it is an open or closed loop.
/// </summary>
/// <param name="edgeColl">EdgeCollection to be converted to a list of segments</param>
/// <returns>A list of segments that make up the edges in the input EdgeCollection</returns>
private static IEnumerable<SegmentShape2D> _EdgeCollToSegments(EdgeCollection<TileEdge> edgeColl)
{
var segments = new List<SegmentShape2D>();
List<Vector2> simplifiedPolygon = edgeColl.GetSimplifiedPerim();
for (int thisIndex = 1; thisIndex < simplifiedPolygon.Count; thisIndex++)
{
int prevIndex = thisIndex - 1;
var segment = new SegmentShape2D
{
A = simplifiedPolygon[prevIndex],
B = simplifiedPolygon[thisIndex],
};
segments.Add(segment);
}
return segments;
}
