public static Mesh2D Paddle(P3 topLeft, float width, float height, P3 position, float roofPct)
{
P3[] vertices = new P3[paddleVerts.Length + 2];
int i; float dx = width / (paddleVerts.Length - 1), dy = roofPct * height;
for (i = 0; i < paddleVerts.Length; i++)
{
vertices[i] = V3.New(topLeft.X + dx * i, topLeft.Y + dy * (1 - (float)paddleVerts[i]), 0);
}
vertices[i] = new V3(topLeft.X + width, topLeft.Y + height, 0); //br
vertices[i + 1] = new V3(topLeft.X, topLeft.Y + height, 0); //bl
return(new Mesh2D(vertices, position));
}
public Result IntersectsWith(Edge other, out P3 intersectionPoint)
{
intersectionPoint = null;
float denom = ((other.Tail.Y - other.Head.Y) * (Tail.X - Head.X)) - ((other.Tail.X - other.Head.X) * (Tail.Y - Head.Y));
float numeA = ((other.Tail.X - other.Head.X) * (Head.Y - other.Head.Y)) - ((other.Tail.Y - other.Head.Y) * (Head.X - other.Head.X));
float numeB = ((Tail.X - Head.X) * (Head.Y - other.Head.Y)) - ((Tail.Y - Head.Y) * (Head.X - other.Head.X));
if (denom == 0)
{
if (numeA == 0 && numeB == 0) //find out if coincident seg touches us
{
V3 n = other.ToVector().Perpendicular2DLeftHanded().UnitVector;
Edge perp = new Edge(other.Head + n, other.Head);
Edge perp2 = new Edge(other.Tail + n, other.Tail);
P3 o;
if (Edge.Result.Intersecting == perp.IntersectsWith(this, out o))
{
intersectionPoint = o;
return(Edge.Result.Intersecting);
}
if (Edge.Result.Intersecting == perp2.IntersectsWith(this, out o))
{
intersectionPoint = o;
return(Edge.Result.Intersecting);
}
return(Result.Coincident);
}
return(Result.Parallel);
}
float ua = numeA / denom;
float ub = numeB / denom;
if (ua >= 0 && ua <= 1.0 && ub >= 0 && ub <= 1.0)
{
// Get the intersection point.
intersectionPoint = V3.New(Head.X + ua * (Tail.X - Head.X), Head.Y + ua * (Tail.Y - Head.Y), 0);
return(Result.Intersecting);
}
return(Result.NotIntersecting);
}
public V3 ToV3()
{
return(V3.New(this));
}