/**
* Takes the x and y bounds of the box and queries the heightmap for the minimum and maximum height in the box.
*
* The values are returned in the query box itself as the Z bounds.
*
* This only works if all vertices of the box are in the same face.
*/
public unsafe void GetBounds(ref BoundingBox box)
{
int firstFace = -1;
Vector3 *corners = stackalloc Vector3[8];
box.GetCornersUnsafe(corners);
for (int i = 0; i < 8; ++i)
{
int face;
MyCubemapHelpers.GetCubeFace(ref corners[i], out face);
if (firstFace == -1)
{
firstFace = face;
}
}
BoundingBox query = new BoundingBox(new Vector3(float.PositiveInfinity, float.PositiveInfinity, 0), new Vector3(float.NegativeInfinity, float.NegativeInfinity, 0));
for (int i = 0; i < 8; ++i)
{
Vector2 tex;
MyCubemapHelpers.CalculateTexcoordForFace(ref corners[i], firstFace, out tex);
if (tex.X < query.Min.X)
{
query.Min.X = tex.X;
}
if (tex.X > query.Max.X)
{
query.Max.X = tex.X;
}
if (tex.Y < query.Min.Y)
{
query.Min.Y = tex.Y;
}
if (tex.Y > query.Max.Y)
{
query.Max.Y = tex.Y;
}
}
m_heightmap.Faces[firstFace].GetBounds(ref query);
box.Min.Z = query.Min.Z * m_heightRatio + InnerRadius;
box.Max.Z = query.Max.Z * m_heightRatio + InnerRadius;
}
public bool IntersectLineFace(ref LineD ll, int face, out double startOffset, out double endOffset)
{
Vector2 start, end;
Vector3 from, to;
from = ll.From;
to = ll.To;
MyCubemapHelpers.CalculateTexcoordForFace(ref from, face, out start);
MyCubemapHelpers.CalculateTexcoordForFace(ref to, face, out end);
int steps = (int)Math.Ceiling((end - start).Length() * m_heightmap.Resolution);
double stepsR = 1d / steps;
for (int i = 0; i < steps; i++)
{
from = ll.From + ll.Direction * ll.Length * i * stepsR;
to = ll.From + ll.Direction * ll.Length * (i + 1) * stepsR;
var flen = from.Length();
var tolen = to.Length();
MyCubemapHelpers.CalculateTexcoordForFace(ref from, face, out start);
MyCubemapHelpers.CalculateTexcoordForFace(ref to, face, out end);
from.X = start.X;
from.Y = start.Y;
from.Z = (flen - m_radius - m_minHillHeight) * m_heightRatioRecip;
to.X = end.X;
to.Y = end.Y;
to.Z = (tolen - m_radius - m_minHillHeight) * m_heightRatioRecip;
float newStart, newEnd;
if (m_heightmap[face].QueryLine(ref from, ref to, out newStart, out newEnd))
{
startOffset = Math.Max((i + newStart) * stepsR, 0);
endOffset = 1.0;
return(true);
}
}
startOffset = 0;
endOffset = 1;
return(false);
}
/// <summary>
/// Get the minimum and maximum ranges of terrain height in the area determined by the provided points.
/// </summary>
/// <param name="localPoints">List of points to query</param>
/// <param name="pointCount">Number of points</param>
/// <param name="minHeight">The calculated minimum possible height of terrain</param>
/// <param name="maxHeight">The calculated maximum possible height of terrain</param>
public unsafe void GetBounds(Vector3 *localPoints, int pointCount, out float minHeight, out float maxHeight)
{
int firstFace = -1;
for (int i = 0; i < pointCount; ++i)
{
int face;
MyCubemapHelpers.GetCubeFace(ref localPoints[i], out face);
if (firstFace == -1)
{
firstFace = face;
}
}
BoundingBox query = new BoundingBox(new Vector3(float.PositiveInfinity, float.PositiveInfinity, 0), new Vector3(float.NegativeInfinity, float.NegativeInfinity, 0));
for (int i = 0; i < pointCount; ++i)
{
Vector2 tex;
MyCubemapHelpers.CalculateTexcoordForFace(ref localPoints[i], firstFace, out tex);
if (tex.X < query.Min.X)
{
query.Min.X = tex.X;
}
if (tex.X > query.Max.X)
{
query.Max.X = tex.X;
}
if (tex.Y < query.Min.Y)
{
query.Min.Y = tex.Y;
}
if (tex.Y > query.Max.Y)
{
query.Max.Y = tex.Y;
}
}
m_heightmap.Faces[firstFace].GetBounds(ref query);
minHeight = query.Min.Z * m_heightRatio + InnerRadius;
maxHeight = query.Max.Z * m_heightRatio + InnerRadius;
}
public unsafe void GetBounds(Vector3D *localPoints, int pointCount, out float minHeight, out float maxHeight)
{
int face = -1;
for (int i = 0; i < pointCount; i++)
{
int num3;
Vector3 position = *((Vector3 *)(localPoints + i));
MyCubemapHelpers.GetCubeFace(ref position, out num3);
if (face == -1)
{
face = num3;
}
}
BoundingBox query = new BoundingBox(new Vector3(float.PositiveInfinity, float.PositiveInfinity, 0f), new Vector3(float.NegativeInfinity, float.NegativeInfinity, 0f));
for (int j = 0; j < pointCount; j++)
{
Vector2 vector2;
Vector3 localPos = *((Vector3 *)(localPoints + j));
MyCubemapHelpers.CalculateTexcoordForFace(ref localPos, face, out vector2);
if (vector2.X < query.Min.X)
{
query.Min.X = vector2.X;
}
if (vector2.X > query.Max.X)
{
query.Max.X = vector2.X;
}
if (vector2.Y < query.Min.Y)
{
query.Min.Y = vector2.Y;
}
if (vector2.Y > query.Max.Y)
{
query.Max.Y = vector2.Y;
}
}
this.m_heightmap.Faces[face].GetBounds(ref query);
minHeight = (query.Min.Z * this.m_heightRatio) + this.InnerRadius;
maxHeight = (query.Max.Z * this.m_heightRatio) + this.InnerRadius;
}
protected unsafe ContainmentType IntersectBoundingBoxInternal(ref BoundingBox box, float lodLevel)
{
int firstFace = -1;
uint faces = 0;
bool complicated = false;
float minHeight;
float maxHeight;
Vector3 *corners = stackalloc Vector3[8];
box.GetCornersUnsafe(corners);
for (int i = 0; i < 8; ++i)
{
int face;
MyCubemapHelpers.GetCubeFace(ref corners[i], out face);
if (firstFace == -1)
{
firstFace = face;
}
else if (firstFace != face)
{
complicated = true;
}
faces |= (uint)(1 << face);
}
if (Vector3.Zero.IsInsideInclusive(ref box.Min, ref box.Max))
{
minHeight = 0;
}
else
{
var clamp = Vector3.Clamp(Vector3.Zero, box.Min, box.Max);
minHeight = clamp.Length();
}
{ // Calculate furthest point in BB
Vector3 end;
Vector3 c = box.Center;
if (c.X < 0)
{
end.X = box.Min.X;
}
else
{
end.X = box.Max.X;
}
if (c.Y < 0)
{
end.Y = box.Min.Y;
}
else
{
end.Y = box.Max.Y;
}
if (c.Z < 0)
{
end.Z = box.Min.Z;
}
else
{
end.Z = box.Max.Z;
}
maxHeight = end.Length();
}
if (complicated)
{
return(IntersectBoundingBoxCornerCase(ref box, faces, corners, minHeight, maxHeight));
}
BoundingBox query = new BoundingBox(new Vector3(float.PositiveInfinity, float.PositiveInfinity, minHeight), new Vector3(float.NegativeInfinity, float.NegativeInfinity, maxHeight));
for (int i = 0; i < 8; ++i)
{
Vector2 tex;
MyCubemapHelpers.CalculateTexcoordForFace(ref corners[i], firstFace, out tex);
if (tex.X < query.Min.X)
{
query.Min.X = tex.X;
}
if (tex.X > query.Max.X)
{
query.Max.X = tex.X;
}
if (tex.Y < query.Min.Y)
{
query.Min.Y = tex.Y;
}
if (tex.Y > query.Max.Y)
{
query.Max.Y = tex.Y;
}
}
query.Min.Z = ((query.Min.Z - m_radius - m_detailScale) - m_minHillHeight) * m_heightRatioRecip;
query.Max.Z = ((query.Max.Z - m_radius) - m_minHillHeight) * m_heightRatioRecip;
return(m_heightmap.Faces[firstFace].QueryHeight(ref query));
}