Ejemplo n.º 1
0
		public bool intersectWith(Line2D l, Vector2D o)
		{
			bool found=false;
			
			float a1,a2,b1,b2;
			
			// calculate slopes, deal with infinity
			if (End.X -Start.X == 0)
				b1 = (float)1e+10;
			else
				b1 = (End.Y-Start.Y)/(End.X-Start.X);
			
			if (l.End.X-l.Start.X == 0)
				b2 = (float)1e+10;
			else
				b2 = (l.End.Y-l.Start.Y)/(l.End.X-l.Start.X);
			
			// calculate position
			a1 = Start.Y   - b1 *  Start.X;
			a2 = l.Start.Y - b2 * l.Start.X;
			o.X = - (a1-a2)/(b1-b2);
			o.Y = a1 + b1*o.X;
			
			// did the lines cross?
			if (	(Start.X-o.X) *(o.X-End.X)	 >= -ROUNDING_ERROR_32 &&
			    (l.Start.X-o.X)*(o.X-l.End.X)>= -ROUNDING_ERROR_32 &&
			    (Start.Y-o.Y)  *(o.Y-End.Y)  >= -ROUNDING_ERROR_32 &&
			    (l.Start.Y-o.Y)*(o.Y-l.End.Y)>= -ROUNDING_ERROR_32 )
			{
				found = true;
			}
			return found;
		}
Ejemplo n.º 2
0
 public double GetAngleWith(Line2D l)
 {
     Vector2D vect = Vector;
     Vector2D vect2 = l.Vector;
     return vect.GetAngleWith(vect2);
 }
Ejemplo n.º 3
0
 public static Line2D From(float xMin, float yMin, float xMax, float yMax)
 {
     Line2D line = new Line2D();
     line.Start = new Vector2D();
     line.End = new Vector2D();
     line.Start.Set(xMin, yMin);
     line.End.Set(xMax, yMax);
     return line;
 }