/*public void CutByRect (Vector3 pos, Vector3 size)
* /// Splits all segments so that each intersection with AABB rect has a node
* {
* for (int i=0; i<13; i++) //spline could be divided in 12 parts maximum
* {
* List<Vector3> newNodes = new List<Vector3>();
*
* for (int n=0; n<nodes.Length-1; n++)
* {
* //early check - if inside/outside rect
* Vector3 min = Vector3.Min(nodes[n], nodes[n+1]);
* Vector3 max = Vector3.Max(nodes[n], nodes[n+1]);
*
* if (max.x < pos.x || min.x > pos.x+size.x ||
* max.z < pos.z || min.z > pos.z+size.z)
* { newNodes.Add(nodes[n+1]); continue; } //fully outside
* if (min.x > pos.x && max.x < pos.x+size.x &&
* min.z > pos.z && max.z < pos.z+size.z)
* { newNodes.Add(nodes[n+1]); continue; } //fully inside
*
* //splitting
* float sp = segments[s].IntersectRect(pos, size);
* if (sp < 0.0001f || sp > 0.999f)
* { newSegments.Add(segments[s]); continue; } //no intersection
*
* (Segment s1, Segment s2) = segments[s].GetSplitted(sp);
* newSegments.Add(s1);
* newSegments.Add(s2);
* }
*
* bool segemntsCountChanged = segments.Length != newSegments.Count;
* segments = newSegments.ToArray();
* if (!segemntsCountChanged) break; //if no nodes added - exiting 12 iterations
* }
* }*/
public void CutAA(float val, CutAxis axis)
/// Cuts the line creating points on horizontal line with X coordinate
{
List <Vector3> newNodes = new List <Vector3>(capacity: nodes.Length)
{
nodes[0]
};
for (int n = 0; n < nodes.Length - 1; n++)
{
float pos0 = axis == CutAxis.AxisX ? nodes[n].x : nodes[n].z;
float pos1 = axis == CutAxis.AxisX ? nodes[n + 1].x : nodes[n + 1].z;
// early check - on one side only
if (pos0 < val && pos1 < val)
{
newNodes.Add(nodes[n + 1]); continue;
}
if (pos0 > val && pos1 > val)
{
newNodes.Add(nodes[n + 1]); continue;
}
// cutting
float percent = (pos0 - val) / (pos0 - pos1);
newNodes.Add(new Vector3(
nodes[n].x * (1 - percent) + nodes[n + 1].x * percent,
nodes[n].y * (1 - percent) + nodes[n + 1].y * percent,
nodes[n].z * (1 - percent) + nodes[n + 1].z * percent));
newNodes.Add(nodes[n + 1]);
}
nodes = newNodes.ToArray();
}
public Spline[] RemoveOuter(float val, CutAxis axis, CutSide side)
/// Removes segment if any of the segment nodes is less than x
/// Will split spline in several, returns new splitted splines
/// Subtract a bit (or add if side is positive) from x when using together wit Cut: +0.0001f*(int)side
{
List <Spline> newSplines = new List <Spline>();
List <Vector3> currSpline = null;
for (int n = 0; n < nodes.Length; n++)
{
bool isOuter = axis == CutAxis.AxisX ? nodes[n].x > val : nodes[n].z > val;
if (side == CutSide.Negative)
{
isOuter = !isOuter;
}
// starting new spline
if (currSpline == null)
{
if (!isOuter)
{
currSpline = new List <Vector3>();
currSpline.Add(nodes[n]);
}
//ignoring if under x
}
else
{
//ending spline
if (isOuter)
{
newSplines.Add(new Spline(currSpline.ToArray()));
currSpline = null;
}
//adding node
else
{
currSpline.Add(nodes[n]);
}
}
}
if (currSpline != null)
{
newSplines.Add(new Spline(currSpline.ToArray()));
}
return(newSplines.ToArray());
}
