// ============================================= Curve related
//this is very slow
public static void Split(BGCurvePoint @from, BGCurvePoint to, int parts, Action <Vector3, Vector3> action)
{
var noControls = @from.ControlType == BGCurvePoint.ControlTypeEnum.Absent && to.ControlType == BGCurvePoint.ControlTypeEnum.Absent;
if (noControls)
{
action(@from.PositionWorld, to.PositionWorld);
}
else
{
var fromPos = @from.PositionWorld;
var toPos = to.PositionWorld;
var control1 = @from.ControlSecondWorld;
var control2 = to.ControlFirstWorld;
var bothControls = @from.ControlType != BGCurvePoint.ControlTypeEnum.Absent && to.ControlType != BGCurvePoint.ControlTypeEnum.Absent;
if (!bothControls && @from.ControlType == BGCurvePoint.ControlTypeEnum.Absent)
{
control1 = control2;
}
var prev = fromPos;
for (var i = 1; i < parts + 1; i++)
{
var ratio = i / (float)parts;
var currentPosition = bothControls
? BGCurveFormulas.BezierCubic(ratio, fromPos, control1, control2, toPos)
: BGCurveFormulas.BezierQuadratic(ratio, fromPos, control1, toPos);
action(prev, currentPosition);
prev = currentPosition;
}
}
}
/// <summary>Tangent in World coordinates </summary>
public static Vector3 CalculateTangent(BGCurvePoint @from, BGCurvePoint to, float t)
{
if (@from.ControlType == BGCurvePoint.ControlTypeEnum.Absent && to.ControlType == BGCurvePoint.ControlTypeEnum.Absent)
{
return((to.PositionWorld - @from.PositionWorld).normalized);
}
if (@from.ControlType != BGCurvePoint.ControlTypeEnum.Absent && to.ControlType != BGCurvePoint.ControlTypeEnum.Absent)
{
return(BGCurveFormulas.BezierCubicDerivative(t, @from.PositionWorld, @from.ControlSecondWorld, to.ControlFirstWorld, to.PositionWorld).normalized);
}
return(BGCurveFormulas.BezierQuadraticDerivative(t, @from.PositionWorld, @from.ControlType == BGCurvePoint.ControlTypeEnum.Absent ? to.ControlFirstWorld : @from.ControlSecondWorld,
to.PositionWorld).normalized);
}
//copy paste from math, not sure how to refactor it
public static Vector3 CalculatePosition(BGCurvePoint @from, BGCurvePoint to, float t)
{
if (@from.ControlType == BGCurvePoint.ControlTypeEnum.Absent && to.ControlType == BGCurvePoint.ControlTypeEnum.Absent)
{
return(Vector3.Lerp(@from.PositionWorld, to.PositionWorld, t));
}
if (@from.ControlType != BGCurvePoint.ControlTypeEnum.Absent && to.ControlType != BGCurvePoint.ControlTypeEnum.Absent)
{
return(BGCurveFormulas.BezierCubic(t, @from.PositionWorld, @from.ControlSecondWorld, to.ControlFirstWorld, to.PositionWorld));
}
return(BGCurveFormulas.BezierQuadratic(t, @from.PositionWorld, @from.ControlType == BGCurvePoint.ControlTypeEnum.Absent ? to.ControlFirstWorld : @from.ControlSecondWorld,
to.PositionWorld));
}
