void Init(P3[] relativeVertices, P3 position)
{
if (relativeVertices.Length < 3)
{
throw new Exception("need at least 3 pts for a poly");
}
relativeVertices = P3.Clone(relativeVertices);
this.relativeVertices = relativeVertices;
this.position = position;
cache();
}
public CustomVertex.TransformedColored[] ToScreen(float scaleFactor, Color color)
{
if (!dirty && oldScalefactor == scaleFactor)
{
return(cachedScreenPts);
}
oldScalefactor = scaleFactor;
dirty = false;
int nv = vertices.Count;
cachedScreenPts = new CustomVertex.TransformedColored[nv + 2]; //center pt + closed poly
cachedScreenPts[0] = Make(centerOfGravity.Clone().ScaleBy(scaleFactor), Jitter(color, 5));
for (int i = 0; i < nv + 1; i++)
{
cachedScreenPts[i + 1] = Make(vertices[i % nv].Clone().ScaleBy(scaleFactor), Jitter(color, 5));
}
return(cachedScreenPts);
}
public Mesh2D Clone()
{
trash = new Mesh2D(P3.Clone(relativeVertices), position.Clone());
trash.velocity = this.velocity.Clone();
return(trash);
}