public Vector2[] CalculateEvenlySpacedPoints(float spacing, float resolution = 1)
{
List <Vector2> evenlySpacedPoints = new List <Vector2>();
evenlySpacedPoints.Add(Curve[0]);
Vector2 previousPoint = Curve[0];
float dstSinceLastEvenPoint = 0;
for (int segmentIndex = 0; segmentIndex < Curve.NumSegments; segmentIndex++)
{
Vector2[] p = Curve.GetPointsInSegment(segmentIndex);
float controlNetLength = Vector2.Distance(p[0], p[1]) + Vector2.Distance(p[1], p[2]) + Vector2.Distance(p[2], p[3]);
float estimatedCurveLength = Vector2.Distance(p[0], p[3]) + controlNetLength / 2f;
int divisions = Mathf.CeilToInt(estimatedCurveLength * resolution * 10);
float t = 0;
while (t <= 1)
{
t += 1f / divisions;
Vector2 pointOnCurve = Bezier.EvaluateCubic(p[0], p[1], p[2], p[3], t);
dstSinceLastEvenPoint += Vector2.Distance(previousPoint, pointOnCurve);
while (dstSinceLastEvenPoint >= spacing)
{
float overshootDst = dstSinceLastEvenPoint - spacing;
Vector2 newEvenlySpacedPoint = pointOnCurve + (previousPoint - pointOnCurve).normalized * overshootDst;
evenlySpacedPoints.Add(newEvenlySpacedPoint);
dstSinceLastEvenPoint = overshootDst;
previousPoint = newEvenlySpacedPoint;
}
previousPoint = pointOnCurve;
}
}
return(evenlySpacedPoints.ToArray());
}
void Input()
{
Event guiEvent = Event.current;
Vector2 mousePos = HandleUtility.GUIPointToWorldRay(guiEvent.mousePosition).origin;
if (guiEvent.type == EventType.MouseDown && guiEvent.shift)
{
if (guiEvent.button == 0)
{
if (selectedSegmentIndex != -1)
{
Undo.RecordObject(curve.Creator, "Split segment");
curve.SplitSegment(mousePos, selectedSegmentIndex);
}
else if (!curve.IsClosed)
{
Undo.RecordObject(curve.Creator, "Add segment");
curve.AddSegment(mousePos);
}
}
}
// if (guiEvent.type == EventType.MouseDown && guiEvent.control && guiEvent.button == 0)
// {
// if (_selectedSegmentIndex != -1)
// {
// Undo.RecordObject(_curve.Creator, "Split segment");
// _curve.SplitSegment(mousePos, _selectedSegmentIndex);
// }
// }
if (guiEvent.type == EventType.MouseDown && guiEvent.button == 1)
{
float minDstToAnchor = curve.Creator.AnchorDiameter * .5f;
int closestAnchorIndex = -1;
for (int i = 0; i < curve.NumPoints; i += 3)
{
float dst = Vector2.Distance(mousePos, curve[i]);
if (dst < minDstToAnchor)
{
minDstToAnchor = dst;
closestAnchorIndex = i;
}
}
if (closestAnchorIndex != -1)
{
Undo.RecordObject(curve.Creator, "Delete segment");
curve.DeleteSegment(closestAnchorIndex);
}
}
if (guiEvent.type == EventType.MouseMove)
{
float minDstToSegment = SEGMENT_SELECT_DISTANCE_THRESHOLD;
int newSelectedSegmentIndex = -1;
for (int i = 0; i < curve.NumSegments; i++)
{
Vector2[] points = curve.GetPointsInSegment(i);
Handles.DrawBezier(points[0], points[3], points[1], points[2], Color.green, null, 2);
float dst = HandleUtility.DistancePointBezier(mousePos, points[0], points[3], points[1], points[2]);
if (dst < minDstToSegment)
{
minDstToSegment = dst;
newSelectedSegmentIndex = i;
}
}
if (newSelectedSegmentIndex != selectedSegmentIndex)
{
selectedSegmentIndex = newSelectedSegmentIndex;
HandleUtility.Repaint();
}
}
HandleUtility.AddDefaultControl(0);
}