// Hook displacements into the bsp tree
static void DispTreeLeafnum(World world)
{
//
// get the number of displacements per leaf
//
List<dDispTri> tris = new List<dDispTri>();
world.dispCollTrees = new DispCollTree[world.DispIndexToFaceIndex.Length];
List<dDispVert> verts = new List<dDispVert>();
int currTri = 0, currVert = 0;
for (int i = 0; i < world.DispIndexToFaceIndex.Length; i++)
{
int j;
int faceIndex = world.DispIndexToFaceIndex[i];
int dispId = world.faces_t[faceIndex].dispinfo;
ddispinfo_t info = world.ddispinfos[dispId];
int power = info.power;
int nVerts = (((1 << (power)) + 1) * ((1 << (power)) + 1));
verts.Clear();
// fail code
for (j = 0; j < nVerts; j++)
{
verts.Add(world.dispVerts[j + currVert]);
}
currVert += nVerts;
int nTris = ((1 << (power)) * (1 << (power)) * 2);
tris.Clear();
for (j = 0; j < nTris; j++)
{
tris.Add(world.dispTris[j + currTri]);
}
currTri += nTris;
Displacement displace = new Displacement();
displace.Surface = new DispSurface();
DispSurface dispSurf = displace.Surface;
dispSurf.m_PointStart = info.startPosition;
dispSurf.m_Contents = info.contents;
displace.InitDispInfo(info.power, info.minTess, info.smoothingAngle, verts, tris);
dispSurf.m_Index = faceIndex;
face_t face = world.faces_t[faceIndex];
if (face.numedges > 4)
continue;
Vector3[] surfPoints = new Vector3[4];
dispSurf.m_PointCount = face.numedges;
for (j = 0; j < face.numedges; j++)
{
int eIndex = world.surfEdges[face.firstedge + j];
if (eIndex < 0)
surfPoints[j] = world.verts[world.edges[-eIndex].v[1]].position;
else
surfPoints[j] = world.verts[world.edges[eIndex].v[0]].position;
}
dispSurf.m_Points = surfPoints;
dispSurf.FindSurfPointStartIndex();
dispSurf.AdjustSurfPointData();
//
// generate the collision displacement surfaces
//
world.dispCollTrees[i] = new DispCollTree();
DispCollTree dispTree = world.dispCollTrees[i];
//
// check for null faces, should have been taken care of in vbsp!!!
//
if (dispSurf.m_PointCount != 4)
continue;
displace.Create();
// new collision
dispTree.Create(displace);
DispTreeLeafnum_r(world, faceIndex, i, 0);
}
}
//-----------------------------------------------------------------------------
// Purpose: allocate and initialize the displacement collision tree data
// Input: pDisp - displacement surface data
// Output: success? (true/false)
//-----------------------------------------------------------------------------
public bool Create(Displacement pDisp)
{
// Displacement size.
Power = pDisp.Power;
// Displacement contents.
DispSurface pSurf = pDisp.Surface;
m_Contents = pSurf.m_Contents;
// Displacement stab direction = base face normal.
m_StabDir = pSurf.GetNormal();
// Copy the base surface points.
for (int iPt = 0; iPt < 4; iPt++)
{
m_SurfPoints[iPt] = pSurf.m_Points[iPt];
}
// Allocate collision tree data.
bool ResultNodes = Nodes_Alloc();
bool ResultVert = AllocVertData();
bool ResultTris = Tris_Alloc();
if (!ResultTris || !ResultVert || !ResultNodes)
{
// Clean up
m_pNodes = null;
m_NodeCount = 0;
m_pVerts = null;
m_pOriginalVerts = null;
m_pVertNormals = null;
m_VertCount = 0;
m_pTris = null;
m_nTriCount = 0;
return false;
}
// Copy the vertices and vertex normals.
for (int iVert = 0; iVert < m_VertCount; iVert++)
{
m_pVerts[iVert] = pDisp.Verts[iVert].m_Vert;
m_pOriginalVerts[iVert] = m_pVerts[iVert];
m_pVertNormals[iVert] = pDisp.Verts[iVert].m_Normal;
}
// Copy the triangle flags data.
for (int iTri = 0; iTri < m_nTriCount; ++iTri )
{
ushort[] ind = pDisp.Tris[iTri].m_iIndex;
m_pTris[iTri].m_uiVerts = ind;
m_pTris[iTri].m_nFlags = pDisp.Tris[iTri].m_uiTags;
// Calculate the surface props.
float totalAlpha = 0.0f;
for (int iVert = 0; iVert < 3; ++iVert)
{
totalAlpha += pDisp.Verts[m_pTris[iTri].m_uiVerts[iVert]].m_Alpha;
}
m_pTris[iTri].m_iSurfProp = 0;
if (totalAlpha > 382.5f)
{
m_pTris[iTri].m_iSurfProp = 1;
}
// Add the displacement surface flag!
m_pTris[iTri].m_nFlags |= (1 << 0);
Tri_CalcPlane(iTri);
}
// create leaf nodes
Leafs_Create();
// create tree nodes
Nodes_Create();
// create the bounding box of the displacement surface + the base face
CalcFullBBox();
// tree successfully created!
return true;
}
