public static float GetLengthAS(this SplineBase spline, int curve, float error)
{
Vector3[] v = new Vector3[4];
v[0] = spline.GetControlPoint(curve * 3);
v[1] = spline.GetControlPoint(curve * 3 + 1);
v[2] = spline.GetControlPoint(curve * 3 + 2);
v[3] = spline.GetControlPoint(curve * 3 + 3);
float length = 0.0f;
AddIfClose(v, ref length, error); /* kick off recursion */
return(length);
}
public static Vector3[] Slice(this SplineBase spline, int curve, float t)
{
Vector3 p1 = spline.GetControlPoint(curve * 3);
Vector3 p2 = spline.GetControlPoint(curve * 3 + 1);
Vector3 p3 = spline.GetControlPoint(curve * 3 + 2);
Vector3 p4 = spline.GetControlPoint(curve * 3 + 3);
Vector3 p12 = (p2 - p1) * t + p1;
Vector3 p23 = (p3 - p2) * t + p2;
Vector3 p34 = (p4 - p3) * t + p3;
Vector3 p123 = (p23 - p12) * t + p12;
Vector3 p234 = (p34 - p23) * t + p23;
Vector3 p1234 = (p234 - p123) * t + p123;
return(new[] { p1, p12, p123, p1234, p234, p34, p4 });
}
public static float GetLengthAS(this SplineBase spline, float error)
{
float totalLength = 0.0f;
Vector3[] v = new Vector3[4];
int curveCount = spline.CurveCount;
for (int curve = 0; curve < curveCount; ++curve)
{
v[0] = spline.GetControlPoint(curve * 3);
v[1] = spline.GetControlPoint(curve * 3 + 1);
v[2] = spline.GetControlPoint(curve * 3 + 2);
v[3] = spline.GetControlPoint(curve * 3 + 3);
float length = 0.0f;
AddIfClose(v, ref length, error);
totalLength += length;
}
return(totalLength);
}
private int HitTest(SplineBase spline, out float minDistance)
{
minDistance = float.PositiveInfinity;
if (Camera == null)
{
Debug.LogError("Camera is null");
return(-1);
}
if (RuntimeSelection.gameObjects == null)
{
return(-1);
}
Vector3[] controlPoints = new Vector3[spline.ControlPointCount];
for (int j = 0; j < controlPoints.Length; j++)
{
controlPoints[j] = spline.GetControlPoint(j);
}
minDistance = SelectionMargin * SelectionMargin;
int selectedIndex = -1;
Vector2 mousePositon = Input.mousePosition;
for (int i = 0; i < controlPoints.Length; ++i)
{
Vector3 ctrlPoint = controlPoints[i];
if (spline.IsControlPointLocked(i))
{
continue;
}
Vector2 pt = Camera.WorldToScreenPoint(ctrlPoint);
float mag = (pt - mousePositon).sqrMagnitude;
if (mag < minDistance)
{
minDistance = mag;
selectedIndex = i;
}
}
return(selectedIndex);
}
