/// <summary>
/// Creates an instance of <see cref="IntersectionPoint"/> with values for its public fields based on <paramref name="point"/>: <see cref="ExtrudedPointUV.Parameter"/>, <see cref="ExtrudedPointUV.Point"/> and <see cref="ExtrudedPointUV.UV"/> values.
/// <see cref="FirstPointSegmentIndex"/> and <see cref="FirstPointSegmentIndex2"/> are based on <paramref name="pointIndices"/>.
/// <see cref="SecondPointSegmentIndex"/> and <see cref="SecondPointSegmentIndex2"/> are based on <paramref name="otherPointIndices"/>.
/// </summary>
/// <param name="point">The <see cref="ExtrudedPointUV"/> supplying <see cref="Parameter"/>, <see cref="Point"/> and <see cref="UV"/> values.</param>
/// <param name="pointIndices">The <see cref="ExtrudedPointUV"/> supplying <see cref="FirstPointSegmentIndex"/> and <see cref="FirstPointSegmentIndex2"/> values.</param>
/// <param name="otherPointIndices">The <see cref="ExtrudedPointUV"/> supplying <see cref="SecondPointSegmentIndex"/> and <see cref="SecondPointSegmentIndex2"/> values.</param>
public IntersectionPoint(ExtrudedPointUV point, ExtrudedPointUV pointIndices, ExtrudedPointUV otherPointIndices)
{
Parameter = point.Parameter;
Point = point.Point;
UV = point.UV;
FirstPointSegmentIndex = pointIndices.LinePointSegmentIndex;
FirstPointSegmentIndex2 = pointIndices.LinePointSegmentIndex2;
SecondPointSegmentIndex = otherPointIndices.LinePointSegmentIndex;
SecondPointSegmentIndex2 = otherPointIndices.LinePointSegmentIndex2;
}
/// <summary>
/// Determines if an extruded point is closer to a line (on a segment-by-segment basis) than the extrusion amount.
/// </summary>
/// <param name="extrudedPoint">Extruded test point</param>
/// <param name="linePointList">List of points defining the line</param>
/// <param name="extrusionAmount">The extrusion amount</param>
internal static bool IsCloserThanExtrusionDistance_Segmentwise(ExtrudedPointUV extrudedPoint, SegmentwiseLinePointListUV linePointList, float extrusionAmount)
{
var linePoints = linePointList.Points;
var linePointsMaximumDelta = linePointList.MaxSegmentDistance;
var numSegments = linePoints.Count - 1;
Vector2 point = extrudedPoint.Point;
var segmentIndex = Math.Max(0, Math.Min(numSegments - 1, extrudedPoint.LinePointSegmentIndex));
var segmentIndex2 = Math.Max(0, Math.Min(numSegments - 1, extrudedPoint.LinePointSegmentIndex2));
bool isCloser = false;
var extrusionAmountAbs = Mathf.Abs(extrusionAmount);
var extrusionAmountSquared = extrusionAmount * extrusionAmount;
//We'll look every *numSteps* points to see what's closest. We will increase it if the line point is much further away than the extrusion distance.
int numSteps = 1;
for (int i = 0; i < numSegments; i += numSteps)
{
if (i != segmentIndex && i != segmentIndex2)
{
isCloser = LineSegmentUtil.IsPointWithinDistanceOfSegment(linePoints[i].Point, linePoints[i + 1].Point, point, extrusionAmountSquared);
}
if (isCloser)
{
break;
}
else
{
var distanceDiff = (linePoints[i].Point - point).magnitude - extrusionAmountAbs;
numSteps = Mathf.FloorToInt(Mathf.Max(1f, distanceDiff / linePointsMaximumDelta));
}
}
return(isCloser);
}
/// <summary>
/// Creates an instance of <see cref="LinePointUV"/> with values for its public field taken from an extruded point <see cref="SegmentwiseExtrudedPointListUV"/>.
/// </summary>
/// <param name="extrudedPoint">The extruded point fromm which to take <see cref="Parameter"/>, <see cref="Point"/> and <see cref="UV"/> values.</param>
public LinePointUV(ExtrudedPointUV extrudedPoint) : this(extrudedPoint.Parameter, extrudedPoint.Point, extrudedPoint.UV)
{
}
/// <summary> Gets the position of a <see cref="ExtrudedPointUV"/>.</summary>
/// <param name="vector2WithUV">The <see cref="ExtrudedPointUV"/>.</param>
private static Vector2 GetVector(ExtrudedPointUV vector2WithUV)
{
return(vector2WithUV.Point);
}
/// <summary> Gets the average of two <see cref="ExtrudedPointUV"/>, not really caring about the line point segment indexes for the purposes of ClosestPointAlongSegmentwiseLine.</summary>
/// <param name="firstVector">The first vector</param>
/// <param name="secondVector">The second vector</param>
/// <param name="fractionOfSecond"> The weight of the second vector in the average</param>
private static ExtrudedPointUV GetAverage(ExtrudedPointUV firstVector, ExtrudedPointUV secondVector, float fractionOfSecond)
{
var averagedLinePoint = new LinePointUV(firstVector).AverageWith(new LinePointUV(secondVector), fractionOfSecond);
return(new ExtrudedPointUV(averagedLinePoint, firstVector.LinePointSegmentIndex, firstVector.LinePointSegmentIndex2));
}
/// <summary>
/// Creates a new instance of <see cref="Vector2WithUV"/> with <see cref="Point"/> and <see cref="UV"/> values from a <paramref name="extrudedPointUV"/>.
/// </summary>
/// <param name="extrudedPointUV">The <see cref="ExtrudedPointUV"/> from which to take <see cref="Point"/> and <see cref="UV"/> values.</param>
internal Vector2WithUV(ExtrudedPointUV extrudedPointUV) : this(extrudedPointUV.Point, extrudedPointUV.UV)
{
}
