// fusion de la forme de base (liner, margelle) et rectangle exterieur
// pour la triangulation
// voir http://www.geometrictools.com/Documentation/TriangulationByEarClipping.pdf
protected void MergedInnerAndOuter()
{
Bounds polyBounds = _polygon.bounds;
Vector3 extents = polyBounds.extents;
Vector3 center = polyBounds.center;
// Pythagore
float translation = _outlineOffset * 1.41421356f; // sqrt (2)
Vector2 upRightDir = new Vector2 (1, 1).normalized * translation;
Vector2 upRight = new Vector2 (center.x + extents.x, center.z + extents.z) + upRightDir;
Vector2 downRightDir = new Vector2 (1, -1).normalized * translation;
Vector2 downRight = new Vector2 (center.x + extents.x, center.z - extents.z) + downRightDir;
Vector2 downLeftDir = new Vector2 (-1, -1).normalized * translation;
Vector2 downLeft = new Vector2 (center.x - extents.x, center.z - extents.z) + downLeftDir;
Vector2 upLeftDir = new Vector2 (-1, 1).normalized * translation;
Vector2 upLeft = new Vector2 (center.x - extents.x, center.z + extents.z) + upLeftDir;
PolygonRawData outerRawPoly = new PolygonRawData ();
outerRawPoly.Add (upRight);
outerRawPoly.Add (downRight);
outerRawPoly.Add (downLeft);
outerRawPoly.Add (upLeft);
Polygon outerPolygon = new Polygon (outerRawPoly);
_mergedPolygon = PolygonOperation.MergeInnerAndOuter (_polygon, outerPolygon);
}
// fusionne deux polygones. Inner doit etre totalement inclus dans outer
// permet la triangulation d'un polygonr avec un trou --> plage
// voir http://www.geometrictools.com/Documentation/TriangulationByEarClipping.pdf
public static MergedPolygon MergeInnerAndOuter(Polygon inner, Polygon outer)
{
MergedPolygon mergedPolygon = new MergedPolygon ();
PolygonRawData mergedPolyRaw = new PolygonRawData ();
MutuallyVisibleVertices mvv = FindMutuallyVisibleVertices (inner, outer);
LoopedList<Point2> innerPoints = inner.GetPoints ();
LoopedList<Point2> outerPoints = outer.GetPoints ();
int innerIndex = 0;
for (; innerIndex <= mvv.innerIndex; ++innerIndex)
{
mergedPolyRaw.Add (innerPoints[innerIndex]);
}
mergedPolygon.originalIndex0 = mergedPolyRaw.Count - 1;
mergedPolygon.originalIndex1 = mergedPolyRaw.Count;
for (int counter = 0, outerIndex = mvv.outerIndex;
counter < outerPoints.Count;
++counter, --outerIndex)
{
mergedPolyRaw.Add (outerPoints[outerIndex]);
}
mergedPolyRaw.Add (outerPoints[mvv.outerIndex] + mvv.duplicatedMVVOffset);
mergedPolygon.duplicatedIndex1 = mergedPolyRaw.Count - 1;
mergedPolyRaw.Add (innerPoints[mvv.innerIndex] + mvv.duplicatedMVVOffset);
mergedPolygon.duplicatedIndex0 = mergedPolyRaw.Count - 1;
for (; innerIndex < innerPoints.Count; ++innerIndex)
{
mergedPolyRaw.Add (innerPoints[innerIndex]);
}
mergedPolygon.polygonRawData = mergedPolyRaw;
// Debug.Log (mergedPolygon.originalIndex0 + " " + mergedPolygon.originalIndex1 + " " + mergedPolygon.duplicatedIndex0 + " " + mergedPolygon.duplicatedIndex1);
return mergedPolygon;
}