internal float SampleField(ref Vector3 position)
{
Vector3 localPosition = position - m_translation;
Vector3I samplePos;
Vector2 pos = Vector2.Zero;
MyCsgPrecomputedHelpres.CalculateSamplePosition(ref localPosition, out samplePos, ref pos, m_header.Resolution);
return(GetValueForPosition(ref samplePos, ref pos, true));
}
private float GetValueForPosition(ref Vector3I samplePos, ref Vector2 pos, bool interpolate)
{
float value = 0.0f;
if (interpolate)
{
float fx = pos.X - samplePos.Y;
float fy = pos.Y - samplePos.Z;
float fx1 = 1.0f - fx;
float fy1 = 1.0f - fy;
Vector2I newSamplePos = new Vector2I(samplePos.Y, samplePos.Z);
ushort height;
int newFacePosition = 0;
GetHeightFromBatch(samplePos.X, newSamplePos.X, newSamplePos.Y, out height);
value += height * (fx1 * fy1);
newSamplePos.X = samplePos.Y + 1;
newSamplePos.Y = samplePos.Z;
newFacePosition = MyCsgPrecomputedHelpres.GetFaceForTexcoord(ref newSamplePos, samplePos.X, m_header.Resolution);
GetHeightFromBatch(newFacePosition, newSamplePos.X, newSamplePos.Y, out height);
value += height * (fx * fy1);
newSamplePos.X = samplePos.Y;
newSamplePos.Y = samplePos.Z + 1;
if (newSamplePos.Y < m_header.Resolution)
{
GetHeightFromBatch(samplePos.X, newSamplePos.X, newSamplePos.Y, out height);
value += height * (fx1 * fy);
newSamplePos.X = samplePos.Y + 1;
newFacePosition = MyCsgPrecomputedHelpres.GetFaceForTexcoord(ref newSamplePos, samplePos.X, m_header.Resolution);
GetHeightFromBatch(newFacePosition, newSamplePos.X, newSamplePos.Y, out height);
value += height * (fx * fy);
}
}
else
{
ushort height;
GetHeightFromBatch(samplePos.X, samplePos.Y, samplePos.Z, out height);
value = height;
}
if (MyFakes.ENABLE_PLANET_FROZEN_SEA)
{
return(Math.Max((value * m_maxHillHeight) / (float)m_header.MaxValue, MyCsgPrecomputedHelpres.FROZEN_OCEAN_LEVEL));
}
return((value * m_maxHillHeight) / (float)m_header.MaxValue);
}
private float SignedDistanceInternal(float lodVoxelSize, IMyModule macroModulator, IMyModule detailModulator, ref Vector3 localPosition, float distance)
{
if (distance > 0.0f)
{
float signedDistance = distance - m_averageRadius;
Vector3I samplePos;
Vector2 pos = Vector2.Zero;
MyCsgPrecomputedHelpres.CalculateSamplePosition(ref localPosition, out samplePos, ref pos, m_header.Resolution);
float value = GetValueForPosition(ref samplePos, ref pos, true);
return((signedDistance - value) / lodVoxelSize);
}
return(0.0f);
}
public MyCsgShapePrecomputed(Vector3 translation, float averageRadius, string folderPath, float maxHillHeight)
{
m_maxHillHeight = maxHillHeight;
m_file = new MemoryMappedFile[MyCsgPrecomputedHelpres.NUM_MAPS];
m_reader = new MemoryMappedViewAccessor[MyCsgPrecomputedHelpres.NUM_MAPS][];
for (int i = 0; i < MyCsgPrecomputedHelpres.NUM_MAPS; ++i)
{
string name = null;
MyCsgPrecomputedHelpres.GetNameForFace(i, ref name);
name = Path.Combine(folderPath, name + ".bin");
FileInfo fi = new FileInfo(name);
long length = fi.Length;
m_file[i] = MemoryMappedFile.CreateFromFile(name, FileMode.Open, null, 0, MemoryMappedFileAccess.Read);
// read header separately
m_headerLenght = 2 * sizeof(int) + 2 * sizeof(ushort);
var headerReader = m_file[i].CreateViewAccessor(0, m_headerLenght, MemoryMappedFileAccess.Read);
headerReader.Read(0, out m_header.MaxValue);
headerReader.Read(sizeof(ushort), out m_header.BatchSize);
headerReader.Read(2 * sizeof(ushort), out m_header.TypeSize);
headerReader.Read(2 * sizeof(ushort) + sizeof(int), out m_header.Resolution);
headerReader.Dispose();
var batchSectorsCount = m_header.Resolution / m_header.BatchSize;
long batchLength = m_header.TypeSize * m_header.BatchSize * m_header.BatchSize;
m_reader[i] = new MemoryMappedViewAccessor[batchSectorsCount * batchSectorsCount];
for (int j = 0; j < batchSectorsCount; ++j)
{
for (int k = 0; k < batchSectorsCount; ++k)
{
int batchIndex = j * batchSectorsCount + k;
long offset = m_headerLenght + j * batchSectorsCount * batchLength + k * batchLength;
long size = batchLength;
m_reader[i][batchIndex] = m_file[i].CreateViewAccessor(offset, size, MemoryMappedFileAccess.Read);
}
}
}
m_batchLength = m_header.BatchSize * m_header.BatchSize * m_header.TypeSize;
m_sectorCount = m_header.Resolution / m_header.BatchSize;
m_averageRadius = averageRadius;
m_translation = translation;
m_innerRadius = averageRadius;
m_outerRadius = averageRadius + m_maxHillHeight;
}
internal override ContainmentType Contains(ref BoundingBox queryAabb, ref BoundingSphere querySphere, float lodVoxelSize)
{
ContainmentType outerContainment, innerContainment;
BoundingSphere sphere = new BoundingSphere(
m_translation,
m_outerRadius + lodVoxelSize);
sphere.Contains(ref queryAabb, out outerContainment);
if (outerContainment == ContainmentType.Disjoint)
{
return(ContainmentType.Disjoint);
}
sphere.Radius = m_innerRadius - lodVoxelSize;
sphere.Contains(ref queryAabb, out innerContainment);
if (innerContainment == ContainmentType.Contains)
{
return(ContainmentType.Contains);
}
float minDistance = float.MaxValue;
float maxDistance = -float.MaxValue;
Vector3 localPosition = queryAabb.Min - m_translation;
float distance = localPosition.LengthSquared();
if (distance < 0.01f)
{
return(ContainmentType.Intersects);
}
Vector3I samplePos;
Vector2 pos = Vector2.Zero;
MyCsgPrecomputedHelpres.CalculateSamplePosition(ref localPosition, out samplePos, ref pos, m_header.Resolution);
float value = GetValueForPosition(ref samplePos, ref pos, true);
minDistance = MathHelper.Min(minDistance, value);
maxDistance = MathHelper.Max(maxDistance, value);
localPosition = queryAabb.Max - m_translation;
distance = localPosition.LengthSquared();
if (distance < 0.01f)
{
return(ContainmentType.Intersects);
}
MyCsgPrecomputedHelpres.CalculateSamplePosition(ref localPosition, out samplePos, ref pos, m_header.Resolution);
value = GetValueForPosition(ref samplePos, ref pos, true);
minDistance = MathHelper.Min(minDistance, value);
maxDistance = MathHelper.Max(maxDistance, value);
sphere.Radius = m_innerRadius + maxDistance + lodVoxelSize;
sphere.Contains(ref queryAabb, out outerContainment);
if (outerContainment == ContainmentType.Disjoint)
{
return(ContainmentType.Disjoint);
}
sphere.Radius = m_innerRadius + minDistance - lodVoxelSize;
sphere.Contains(ref queryAabb, out innerContainment);
if (innerContainment == ContainmentType.Contains)
{
return(ContainmentType.Contains);
}
return(ContainmentType.Intersects);
}
