public override bool getGuidance(Vector3D pos, ref Vector3D guide, ref float weight, float height)
{
if (!base.getGuidance(pos, ref guide, ref weight, height))
{
return(false);
}
// size: 5x2x1, meaning 12.5 x 5 x 2.5
// approximated by y = -(x+6.25)^2*0.008, see http://tinyurl.com/gnm5akr
// for X flip, see below
var localCoords = Vector3D.Transform(pos, this.cubeBlock.WorldMatrixNormalizedInv);
localCoords.X = -localCoords.X; // just mirror, todo redo the equation
if (localCoords.Z < -1.25 || localCoords.Z > 1.25)
{
return(false);
}
localCoords.Y -= height; // guide height above rail -- so we track the actual slope
// closest point to a poly is not entirely trivial and I cba solving it manually, so resort to the laziest approach possible: BINARY SEARCH.
double x = 0.0;
bool success = MinSearch.find_smallest(ref x, xpar => distance(localCoords.X, localCoords.Y, xpar), localCoords.X, -6.25, 6.25, 10);
// MyLog.Default.WriteLine(String.Format("success {0} finding x {1} which has guidefn {2} at {3}", success, x, guidefn(x), localCoords));
if (!success)
{
return(false);
}
var localGuidepoint = new Vector3D(-x, guidefn(x) + height, 0);
var worldGuidepoint = Vector3D.Transform(localGuidepoint, this.cubeBlock.WorldMatrix);
guide += worldGuidepoint;
weight += 1;
return(true);
}
public override bool getGuidance(Vector3D pos, ref Vector3D guide, ref float weight, float height)
{
if (!base.getGuidance(pos, ref guide, ref weight, height))
{
return(false);
}
// size: 5x1x1, meaning 12.5 x 2.5 x 2.5
// approximated by y = (x+6.25)^2*0.008-2.5, see http://tinyurl.com/j9q6fc4
// except with flipped x because whyy
var localCoords = Vector3D.Transform(pos, this.cubeBlock.WorldMatrixNormalizedInv);
localCoords.X = -localCoords.X; // just mirror, todo redo the equation
if (localCoords.Z < -1.25 || localCoords.Z > 1.25)
{
return(false);
}
// "rail coords"
localCoords.Y -= height; // see above
double x = 0.0;
bool success = MinSearch.find_smallest(ref x, xpar => distance(localCoords.X, localCoords.Y, xpar), localCoords.X, -6.25, 6.25, 10);
if (!success)
{
return(false);
}
var localGuidepoint = new Vector3D(-x, railfn(x) + height, 0);
var worldGuidepoint = Vector3D.Transform(localGuidepoint, this.cubeBlock.WorldMatrix);
guide += worldGuidepoint;
weight += 1;
return(true);
}