private Leaf[] GetLeafs(Stream stream)
{
Lump lump = header.lumps[(int)LumpType.LUMP_LEAFS];
Leaf[] leafData = new Leaf[lump.length / 56];
stream.Position = lump.offset;
for (int i = 0; i < leafData.Length; i++)
{
leafData[i] = new Leaf();
leafData[i].contents = (ContentsFlag)UtilityReader.ReadInt(stream);
leafData[i].cluster = UtilityReader.ReadShort(stream);
leafData[i].area = UtilityReader.ReadShort(stream);
leafData[i].flags = UtilityReader.ReadShort(stream);
leafData[i].mins = new short[3];
leafData[i].mins[0] = UtilityReader.ReadShort(stream);
leafData[i].mins[1] = UtilityReader.ReadShort(stream);
leafData[i].mins[2] = UtilityReader.ReadShort(stream);
leafData[i].maxs = new short[3];
leafData[i].maxs[0] = UtilityReader.ReadShort(stream);
leafData[i].maxs[1] = UtilityReader.ReadShort(stream);
leafData[i].maxs[2] = UtilityReader.ReadShort(stream);
leafData[i].firstleafface = UtilityReader.ReadUShort(stream);
leafData[i].numleaffaces = UtilityReader.ReadUShort(stream);
leafData[i].firstleafbrush = UtilityReader.ReadUShort(stream);
leafData[i].numleafbrushes = UtilityReader.ReadUShort(stream);
leafData[i].leafWaterDataID = UtilityReader.ReadShort(stream);
}
return leafData;
}
public bool IsVisible(Vector3D start, Vector3D end)
{
Vector3D vDirection = end - start;
Vector3D vPoint = start;
int iStepCount = (int)vDirection.Length();
vDirection /= iStepCount;
Leaf pLeaf = new Leaf() { area = -1 };
while (iStepCount > 0)
{
vPoint += vDirection;
pLeaf = GetLeafForPoint(vPoint);
if (pLeaf.area != -1)
{
if (
(pLeaf.contents & ContentsFlag.CONTENTS_SOLID) == ContentsFlag.CONTENTS_SOLID
|| (pLeaf.contents & ContentsFlag.CONTENTS_DETAIL) == ContentsFlag.CONTENTS_DETAIL
)
{
break;
}
}
iStepCount--;
}
return (pLeaf.contents & ContentsFlag.CONTENTS_SOLID) != ContentsFlag.CONTENTS_SOLID;
}