bool _GetBoundingBoxAABB(int DIM_, ref Vector3 boxA, ref Vector3 boxB, float minV, float maxV, ref Matrix4x4 innerTransform)
{
BoxCollector boxCollector = new BoxCollector();
//BoxCollector boxCollector2 = new BoxCollector(); // for Inner
if (_lineList != null)
{
for (int i = 0, count = (int)_lineList.Length / 2 * 2; i < count; i += 2)
{
//assert( (int)_lineList[i + 0] < _vertexList.size() && (int)_lineList[i + 1] < _vertexList.size() );
Vector3 vertex0 = _vertexList[_lineList[i + 0]];
Vector3 vertex1 = _vertexList[_lineList[i + 1]];
if (vertex0[DIM_] > vertex1[DIM_])
{
_Swap(ref vertex0, ref vertex1);
}
if (vertex0[DIM_] >= maxV || vertex1[DIM_] <= minV)
{
// Out of range.
}
else
{
if (vertex0[DIM_] < minV) /* Begin point smaller than minV */
{
if (!_FuzzyZero(vertex0[DIM_] - vertex1[DIM_])) /* Overlap check( Check for 0 divide ) */
/* Compute cross point in target area(minV) */
{
Vector3 modVertex0 = (vertex0 + (vertex1 - vertex0) * (minV - vertex0[DIM_]) / (vertex1[DIM_] - vertex0[DIM_]));
boxCollector.Collect(modVertex0);
}
}
else
{
boxCollector.Collect(vertex0);
}
if (vertex1[DIM_] > maxV) /* End point bigger than maxV */
{
if (!_FuzzyZero(vertex0[DIM_] - vertex1[DIM_])) /* Overlap check( Check for 0 divide ) */
/* Compute cross point in target area(maxV) */
{
Vector3 modVertex1 = (vertex1 + (vertex0 - vertex1) * (vertex1[DIM_] - maxV) / (vertex1[DIM_] - vertex0[DIM_]));
boxCollector.Collect(modVertex1);
}
}
else
{
boxCollector.Collect(vertex1);
}
}
}
}
boxA = boxCollector.boxA;
boxB = boxCollector.boxB;
if (boxA == boxB)
{
return(false);
}
boxA[DIM_] = minV;
boxB[DIM_] = maxV;
return(true);
}
bool _MakeSlicedBoundingBoxAABB()
{
int SliceCount = _sliceCount;
float f_SliceCount = (float)_sliceCount;
int minimumDim = -1;
float minimumVolume = 0.0f;
Vector3[] minimumBoxA = null;
Vector3[] minimumBoxB = null;
/* memo: Choose minimum box in 3 direction. */
for (int i = 0; i < 3; ++i)
{
/* Compute AABB in 31 dividing box. */
List <Vector3> tempBoxA = new List <Vector3>(SliceCount);
List <Vector3> tempBoxB = new List <Vector3>(SliceCount);
switch (i)
{
case 0: // X
if (minimumDim < 0 || _sliceMode == SliceMode.Auto || _sliceMode == SliceMode.X)
{
Matrix4x4 transform = Matrix4x4.TRS(Vector3.zero, Quaternion.Euler(45.0f, 0.0f, 0.0f), Vector3.one); /* Right Hand(Left Rotation) */
// Limit search range
Vector3 boundingBoxA = _boundingBoxA;
Vector3 boundingBoxB = _boundingBoxB;
boundingBoxA[0] += _thicknessA[0];
boundingBoxB[0] += _thicknessB[0];
float minX = boundingBoxA.x;
float stepX = (boundingBoxB.x - boundingBoxA.x) / f_SliceCount;
float tempVolume = 0.0f;
for (int n = 0; n < SliceCount; ++n)
{
float maxX = minX + stepX;
Vector3 boxA = Vector3.zero, boxB = Vector3.zero;
if (_GetBoundingBoxAABB(0, ref boxA, ref boxB, minX, maxX, ref transform))
{
boxA.x = minX;
boxB.x = maxX;
tempBoxA.Add(boxA);
tempBoxB.Add(boxB);
tempVolume += _GetBoxVolume(boxA, boxB);
}
minX = maxX;
}
if (tempVolume > Mathf.Epsilon)
{
minimumDim = 0;
minimumVolume = tempVolume;
minimumBoxA = tempBoxA.ToArray();
minimumBoxB = tempBoxB.ToArray();
}
}
break;
case 1: // Y
if (minimumDim < 0 || _sliceMode == SliceMode.Auto || _sliceMode == SliceMode.Y)
{
Matrix4x4 transform = Matrix4x4.TRS(Vector3.zero, Quaternion.Euler(0.0f, 45.0f, 0.0f), Vector3.one); /* Right Hand(Left Rotation) */
// Limit search range
Vector3 boundingBoxA = _boundingBoxA;
Vector3 boundingBoxB = _boundingBoxB;
boundingBoxA[1] += _thicknessA[1];
boundingBoxB[1] += _thicknessB[1];
float minY = boundingBoxA.y;
float stepY = (boundingBoxB.y - boundingBoxA.y) / f_SliceCount;
float tempVolume = 0.0f;
for (int n = 0; n < SliceCount; ++n)
{
float maxY = minY + stepY;
Vector3 boxA = Vector3.zero, boxB = Vector3.zero;
if (_GetBoundingBoxAABB(1, ref boxA, ref boxB, minY, maxY, ref transform))
{
boxA.y = minY;
boxB.y = maxY;
tempBoxA.Add(boxA);
tempBoxB.Add(boxB);
tempVolume += _GetBoxVolume(boxA, boxB);
}
minY = maxY;
}
if (tempVolume > Mathf.Epsilon)
{
if (_sliceMode == SliceMode.Y || minimumVolume > tempVolume)
{
minimumDim = 1;
minimumVolume = tempVolume;
minimumBoxA = tempBoxA.ToArray();
minimumBoxB = tempBoxB.ToArray();
}
}
}
break;
case 2: // Z
if (minimumDim < 0 || _sliceMode == SliceMode.Auto || _sliceMode == SliceMode.Z)
{
Matrix4x4 transform = Matrix4x4.TRS(Vector3.zero, Quaternion.Euler(0.0f, 0.0f, 45.0f), Vector3.one); /* Right Hand(Left Rotation) */
// Limit search range
Vector3 boundingBoxA = _boundingBoxA;
Vector3 boundingBoxB = _boundingBoxB;
boundingBoxA[2] += _thicknessA[2];
boundingBoxB[2] += _thicknessB[2];
float minZ = boundingBoxA.z;
float stepZ = (boundingBoxB.z - boundingBoxA.z) / f_SliceCount;
float tempVolume = 0.0f;
for (int n = 0; n < SliceCount; ++n)
{
float maxZ = minZ + stepZ;
Vector3 boxA = Vector3.zero, boxB = Vector3.zero;
if (_GetBoundingBoxAABB(2, ref boxA, ref boxB, minZ, maxZ, ref transform))
{
boxA.z = minZ;
boxB.z = maxZ;
tempBoxA.Add(boxA);
tempBoxB.Add(boxB);
tempVolume += _GetBoxVolume(boxA, boxB);
}
minZ = maxZ;
}
if (tempVolume > Mathf.Epsilon)
{
if (_sliceMode == SliceMode.Z || minimumVolume > tempVolume)
{
minimumDim = 2;
minimumVolume = tempVolume;
minimumBoxA = tempBoxA.ToArray();
minimumBoxB = tempBoxB.ToArray();
}
}
}
break;
}
}
if (minimumDim < 0 || minimumBoxA == null || minimumBoxA.Length == 0)
{
return(false);
}
Vector3 thicknessA = _thicknessA;
Vector3 thicknessB = _thicknessB;
thicknessA[minimumDim] = 0;
thicknessB[minimumDim] = 0;
if (_minThickness != Vector3.zero)
{
for (int i = 0; i < minimumBoxA.Length; ++i)
{
if (minimumDim != 0)
{
_ComputeMinThickness(ref minimumBoxA[i].x, ref minimumBoxB[i].x, _minThickness.x);
}
if (minimumDim != 1)
{
_ComputeMinThickness(ref minimumBoxA[i].y, ref minimumBoxB[i].y, _minThickness.y);
}
if (minimumDim != 2)
{
_ComputeMinThickness(ref minimumBoxA[i].z, ref minimumBoxB[i].z, _minThickness.z);
}
}
int end = minimumBoxA.Length - 1;
if (minimumDim == 0)
{
_ComputeMinThickness(ref minimumBoxA[0].x, ref minimumBoxB[end].x, _minThickness.x);
}
if (minimumDim == 1)
{
_ComputeMinThickness(ref minimumBoxA[0].y, ref minimumBoxB[end].y, _minThickness.y);
}
if (minimumDim == 2)
{
_ComputeMinThickness(ref minimumBoxA[0].z, ref minimumBoxB[end].z, _minThickness.z);
}
}
if (_scale != Vector3.one)
{
for (int i = 0; i < minimumBoxA.Length; ++i)
{
minimumBoxA[i] = ScaledVector(minimumBoxA[i], _scale);
minimumBoxB[i] = ScaledVector(minimumBoxB[i], _scale);
}
}
if (thicknessA != Vector3.zero || thicknessB != Vector3.zero)
{
for (int i = 0; i < minimumBoxA.Length; ++i)
{
minimumBoxA[i] += thicknessA;
minimumBoxB[i] += thicknessB;
}
}
if (_offset != Vector3.zero)
{
for (int i = 0; i < minimumBoxA.Length; ++i)
{
minimumBoxA[i] += _offset;
minimumBoxB[i] += _offset;
}
}
{
BoxCollector boxCollector = new BoxCollector();
boxCollector.Collect(minimumBoxA);
boxCollector.Collect(minimumBoxB);
if (boxCollector.isAnything)
{
_reducedBoxA = boxCollector.boxA;
_reducedBoxB = boxCollector.boxB;
}
}
_slicedDimention = minimumDim;
_slicedBoundingBoxA = minimumBoxA.Clone() as Vector3[];
_slicedBoundingBoxB = minimumBoxB.Clone() as Vector3[];
_slicedBoundingBoxC = minimumBoxA.Clone() as Vector3[];
_slicedBoundingBoxD = minimumBoxB.Clone() as Vector3[];
/* AB ... Plane of begin CD ... Plane of end */
/* AB / CD are diagonal planes. AB / CD planes are parallel. */
/* Adjacent CD/AB is equal minimumDim(X,Y,Z). */
/* Adjacent CD/AB is equal after Combine optimized. */
for (int i = 0; i < minimumBoxA.Length; ++i)
{
_slicedBoundingBoxB[i][minimumDim] = _slicedBoundingBoxA[i][minimumDim];
_slicedBoundingBoxC[i][minimumDim] = _slicedBoundingBoxD[i][minimumDim];
}
/* Combine optimized.(Optimized vertices, exclude begin/end plane.) */
for (int i = 1; i < minimumBoxA.Length; ++i)
{
/* Average VertexA. */
Vector3 boxA1 = minimumBoxA[i];
Vector3 boxA0 = minimumBoxA[i - 1];
boxA0[minimumDim] = boxA1[minimumDim];
Vector3 boxAM = (boxA1 + boxA0) / 2.0f;
/* Copy arrangemented vertexA. */
_slicedBoundingBoxA[i] = boxAM;
_slicedBoundingBoxC[i - 1] = boxAM;
/* Average VertexB */
Vector3 boxB0 = minimumBoxB[i - 1];
Vector3 boxB1 = minimumBoxB[i];
boxB1[minimumDim] = boxB0[minimumDim];
Vector3 boxBM = (boxB1 + boxB0) / 2.0f;
/* Copy arrangemented vertexB. */
_slicedBoundingBoxB[i] = boxBM;
_slicedBoundingBoxD[i - 1] = boxBM;
}
return(true);
}
