// Check raycast collision
public override RaycastHit CheckRay(Vector2 start, Vector2 direction)
{
Vector2[] points = GetPoints();
Vector2 end = start + direction;
LineHit closest = PhysicsUtils.CheckLineCollision(points[3], points[0], start, end);
for (int i = 0; i <= 2; i++)
{
Vector2 p1 = points[i];
Vector2 p2 = points[i + 1];
LineHit hit = PhysicsUtils.CheckLineCollision(p1, p2, start, end);
if (hit.hit)
{
if (!closest.hit || Vector2.Distance(hit.hitPoint, start) < Vector2.Distance(closest.hitPoint, start))
{
closest = hit;
}
}
}
if (!closest.hit)
{
return(null);
}
RaycastHit raycastHit = new RaycastHit(closest.hitPoint, entity, Vector2.Distance(closest.hitPoint, start));
return(raycastHit);
}
public PolyLineCreator(int id, int defaultLength, Brush stroke, double strokeThickness, LineHit lineHit, ShapeSerializer shapeSerializer) : base(shapeSerializer)
{
this.id = id;
this.defaultLength = defaultLength;
this.stroke = stroke;
this.strokeThickness = strokeThickness;
this.lineHit = lineHit;
exampleFactory = new Lazy <PolyLineObject>(() => new PolyLineObject(id, new Point(0, 0), new Point(0, 0), Brushes.Transparent, 0, lineHit));
}
public RectangleCreator(int id, int defaultLength, int defaultHeight, Brush stroke, double strokeThickness, Brush fill, LineHit lineHit, ShapeSerializer shapeSerializer) : base(shapeSerializer)
{
this.id = id;
this.defaultLength = defaultLength;
this.defaultHeight = defaultHeight;
this.stroke = stroke;
this.strokeThickness = strokeThickness;
this.fill = fill;
this.lineHit = lineHit;
exampleFactory = new Lazy <RectangleObject>(() => new RectangleObject(id, new Point(0, 0), new Point(0, 0), Brushes.Transparent, 0, Brushes.Transparent, lineHit));
}
// Find the hitpoints of two colliding polygons via Line collision
public Vector2[] FindPolygonHitpoints(Line[] poly1, Line[] poly2)
{
List <Vector2> collisionPoints = new List <Vector2>();
foreach (Line line1 in poly1)
{
foreach (Line line2 in poly2)
{
LineHit lineHit = PhysicsUtils.CheckLineCollision(line1.p1, line1.p2, line2.p1, line2.p2);
if (lineHit.hit)
{
collisionPoints.Add(lineHit.hitPoint);
}
}
}
return(collisionPoints.ToArray());
}
// Check for the collision of two lines using cramers rule
public static LineHit CheckLineCollision(Vector2 p1, Vector2 p2, Vector2 q1, Vector2 q2)
{
Vector2 a = p2 - p1;
Vector2 b = q2 - q1;
Vector2 c = q1 - p1;
// Check if parallel;
LineHit linehit = new LineHit();
linehit.hitPoint = Vector2.Zero;
linehit.hit = false;
if (SealMath.Approximately(a.X / b.X, a.Y / b.Y))
{
return(linehit);
}
// Use Cramers Rule to solve
float D = (a.X * b.Y) - (a.Y * b.X);
float D_x = (c.X * b.Y) - (c.Y * b.X);
float D_y = (a.X * c.Y) - (a.Y * c.X);
float x = D_x / D;
float y = D_y / D;
if ((0 <= x && x <= 1) && (0 <= y && y <= 1))
{
linehit.hitPoint = p1 + x * a;
linehit.hit = true;
}
return(linehit);
}
public FreeRectangleBehaviour(RectangleState state, LineHit lineHit) : base(state)
{
this.lineHit = lineHit;
}
public PointPolyLineBehaviour(PoliLineState lineState, LineHit lineHit) : base(lineState)
{
this.lineHit = lineHit;
}
public PolyLineObject(int id, System.Windows.Point start, System.Windows.Point end, Brush stroke, double strokeThickness, LineHit lineHit)
{
Freeze();
ShapeId = id;
state = new PoliLineState {
StrokeThickness = strokeThickness, Points = new List <System.Windows.Point> {
start, end
}
};
freeBehaviour = new FreePoliLineBehaviour(state, lineHit);
currentBehaviour = freeBehaviour;
behaviours = new List <ShapeBehaviour <PoliLineState> > {
new PointPolyLineBehaviour(state, lineHit),
new SelectPolyLineBehaviour(state),
freeBehaviour
};
Shape = new DrawingVisual();
Stroke = stroke;
Unfreeze();
}
public RectangleObject(int id, Point leftTop, Point rightBottom, Brush stroke, double strokeThickness, Brush fill, LineHit lineHit)
{
Freeze();
ShapeId = id;
var rightTop = new Point(rightBottom.X, leftTop.Y);
var leftBottom = new Point(leftTop.X, rightBottom.Y);
state = new RectangleState {
TopLeft = leftTop, TopRight = rightTop, BottomRight = rightBottom, BottomLeft = leftBottom, StrokeThickness = strokeThickness
};
freeBehaviour = new FreeRectangleBehaviour(state, lineHit);
behaviours = new List <ShapeBehaviour <RectangleState> > {
new ResizeRectangleBehaviour(state, lineHit),
new SelectRectangleBehaviour(state),
freeBehaviour,
};
currentBehaviour = freeBehaviour;
Shape = new DrawingVisual();
Stroke = stroke;
Fill = fill;
Unfreeze();
}
public FreePoliLineBehaviour(PoliLineState lineState, LineHit lineHit) : base(lineState)
{
this.lineHit = lineHit;
}
public ResizeRectangleBehaviour(RectangleState shapeState, LineHit lineHit) : base(shapeState)
{
this.lineHit = lineHit;
}
public void Start()
{
var host = new Host();
var lineHit = new LineHit();
var propCache = new PropertyCache();
var shapeSerializer = new ShapeSerializer(propCache);
var sceneStore = new JsonSceneStore();
var rotateParam = new RotateParam {
Angle = 0
};
var rotateView = new IntInputView {
DataContext = new RotateViewModel(rotateParam)
};
var thiknessParam = new ThiknessParam {
Thikness = 5
};
var thiknessView = new IntInputView {
DataContext = new ThiknessViewModel(thiknessParam)
};
var colorParam = new ColorParam {
Color = Colors.Black
};
var colorView = new ColorView {
DataContext = new ColorViewModel <IShapeObject>(colorParam)
};
var fillParam = new FillParam {
Color = Colors.Transparent
};
var fillView = new ColorView {
DataContext = new ColorViewModel <IFillObject>(fillParam)
};
var vm = new HostViewModel(
host.Canvas,
new List <ShapeToolParam> {
new ShapeToolParam("Поворот", rotateView, rotateParam),
new ShapeToolParam("Толщина", thiknessView, thiknessParam),
new ShapeToolParam("Цвет", colorView, colorParam),
new ShapeToolParam("Заливка", fillView, fillParam),
},
sceneStore,
new ShapeTool(0, LoadImage("pack://application:,,,/Painter;component/Resources/Images/line.png"),
new PolyLineCreator(0, 50, Brushes.Black, 10, lineHit, shapeSerializer)),
new ShapeTool(1, LoadImage("pack://application:,,,/Painter;component/Resources/Images/rectangle.png"),
new RectangleCreator(1, 50, 50, Brushes.Black, 10, Brushes.Transparent, lineHit, shapeSerializer))
);
host.DataContext = vm;
App.Current.MainWindow = host;
host.Show();
}
