static object _LastObj; // see comments
/// <summary>
/// R_AddEfrags
/// </summary>
public static void AddEfrags(entity_t ent)
{
if (ent.model == null)
return;
_AddEnt = ent;
_LastObj = ent; // lastlink = &ent->efrag;
_EfragTopNode = null;
model_t entmodel = ent.model;
_EMins = ent.origin + entmodel.mins;
_EMaxs = ent.origin + entmodel.maxs;
SplitEntityOnNode(Client.cl.worldmodel.nodes[0]);
ent.topnode = _EfragTopNode;
}
/// <summary>
/// SV_FindTouchedLeafs
/// </summary>
static void FindTouchedLeafs(edict_t ent, mnodebase_t node)
{
if (node.contents == Contents.CONTENTS_SOLID)
{
return;
}
// add an efrag if the node is a leaf
if (node.contents < 0)
{
if (ent.num_leafs == Progs.MAX_ENT_LEAFS)
{
return;
}
mleaf_t leaf = (mleaf_t)node;
int leafnum = Array.IndexOf(sv.worldmodel.leafs, leaf) - 1;
ent.leafnums[ent.num_leafs] = (short)leafnum;
ent.num_leafs++;
return;
}
// NODE_MIXED
mnode_t n = (mnode_t)node;
mplane_t splitplane = n.plane;
int sides = Mathlib.BoxOnPlaneSide(ref ent.v.absmin, ref ent.v.absmax, splitplane);
// recurse down the contacted sides
if ((sides & 1) != 0)
{
FindTouchedLeafs(ent, n.children[0]);
}
if ((sides & 2) != 0)
{
FindTouchedLeafs(ent, n.children[1]);
}
}
/// <summary>
/// R_MarkLights
/// </summary>
static void MarkLights(dlight_t light, int bit, mnodebase_t node)
{
if (node.contents < 0)
{
return;
}
mnode_t n = (mnode_t)node;
mplane_t splitplane = n.plane;
float dist = Vector3.Dot(light.origin, splitplane.normal) - splitplane.dist;
if (dist > light.radius)
{
MarkLights(light, bit, n.children[0]);
return;
}
if (dist < -light.radius)
{
MarkLights(light, bit, n.children[1]);
return;
}
// mark the polygons
for (int i = 0; i < n.numsurfaces; i++)
{
msurface_t surf = Client.cl.worldmodel.surfaces[n.firstsurface + i];
if (surf.dlightframe != _DlightFrameCount)
{
surf.dlightbits = 0;
surf.dlightframe = _DlightFrameCount;
}
surf.dlightbits |= bit;
}
MarkLights(light, bit, n.children[0]);
MarkLights(light, bit, n.children[1]);
}
/// <summary>
/// SV_AddToFatPVS
/// The PVS must include a small area around the client to allow head bobbing
/// or other small motion on the client side. Otherwise, a bob might cause an
/// entity that should be visible to not show up, especially when the bob
/// crosses a waterline.
/// </summary>
static void AddToFatPVS(ref Vector3 org, mnodebase_t node)
{
while (true)
{
// if this is a leaf, accumulate the pvs bits
if (node.contents < 0)
{
if (node.contents != Contents.CONTENTS_SOLID)
{
byte[] pvs = Mod.LeafPVS((mleaf_t)node, sv.worldmodel);
for (int i = 0; i < _FatBytes; i++)
{
_FatPvs[i] |= pvs[i];
}
}
return;
}
mnode_t n = (mnode_t)node;
mplane_t plane = n.plane;
float d = Vector3.Dot(org, plane.normal) - plane.dist;
if (d > 8)
{
node = n.children[0];
}
else if (d < -8)
{
node = n.children[1];
}
else
{ // go down both
AddToFatPVS(ref org, n.children[0]);
node = n.children[1];
}
}
}
static int RecursiveLightPoint(mnodebase_t node, ref Vector3 start, ref Vector3 end)
{
if (node.contents < 0)
{
return(-1); // didn't hit anything
}
mnode_t n = (mnode_t)node;
// calculate mid point
// FIXME: optimize for axial
mplane_t plane = n.plane;
float front = Vector3.Dot(start, plane.normal) - plane.dist;
float back = Vector3.Dot(end, plane.normal) - plane.dist;
int side = front < 0 ? 1 : 0;
if ((back < 0 ? 1 : 0) == side)
{
return(RecursiveLightPoint(n.children[side], ref start, ref end));
}
float frac = front / (front - back);
Vector3 mid = start + (end - start) * frac;
// go down front side
int r = RecursiveLightPoint(n.children[side], ref start, ref mid);
if (r >= 0)
{
return(r); // hit something
}
if ((back < 0 ? 1 : 0) == side)
{
return(-1); // didn't hit anuthing
}
// check for impact on this node
_LightSpot = mid;
_LightPlane = plane;
msurface_t[] surf = Client.cl.worldmodel.surfaces;
int offset = n.firstsurface;
for (int i = 0; i < n.numsurfaces; i++, offset++)
{
if ((surf[offset].flags & Surf.SURF_DRAWTILED) != 0)
{
continue; // no lightmaps
}
mtexinfo_t tex = surf[offset].texinfo;
int s = (int)(Vector3.Dot(mid, tex.vecs[0].Xyz) + tex.vecs[0].W);
int t = (int)(Vector3.Dot(mid, tex.vecs[1].Xyz) + tex.vecs[1].W);
if (s < surf[offset].texturemins[0] || t < surf[offset].texturemins[1])
{
continue;
}
int ds = s - surf[offset].texturemins[0];
int dt = t - surf[offset].texturemins[1];
if (ds > surf[offset].extents[0] || dt > surf[offset].extents[1])
{
continue;
}
if (surf[offset].sample_base == null)
{
return(0);
}
ds >>= 4;
dt >>= 4;
byte[] lightmap = surf[offset].sample_base;
int lmOffset = surf[offset].sampleofs;
short[] extents = surf[offset].extents;
r = 0;
if (lightmap != null)
{
lmOffset += dt * ((extents[0] >> 4) + 1) + ds;
for (int maps = 0; maps < BspFile.MAXLIGHTMAPS && surf[offset].styles[maps] != 255; maps++)
{
int scale = _LightStyleValue[surf[offset].styles[maps]];
r += lightmap[lmOffset] * scale;
lmOffset += ((extents[0] >> 4) + 1) * ((extents[1] >> 4) + 1);
}
r >>= 8;
}
return(r);
}
// go down back side
return(RecursiveLightPoint(n.children[side == 0 ? 1 : 0], ref mid, ref end));
}
/// <summary>
/// R_RecursiveWorldNode
/// </summary>
static void RecursiveWorldNode(mnodebase_t node)
{
if (node.contents == Contents.CONTENTS_SOLID)
{
return; // solid
}
if (node.visframe != _VisFrameCount)
{
return;
}
if (CullBox(ref node.mins, ref node.maxs))
{
return;
}
int c;
// if a leaf node, draw stuff
if (node.contents < 0)
{
mleaf_t pleaf = (mleaf_t)node;
msurface_t[] marks = pleaf.marksurfaces;
int mark = pleaf.firstmarksurface;
c = pleaf.nummarksurfaces;
if (c != 0)
{
do
{
marks[mark].visframe = _FrameCount;
mark++;
} while (--c != 0);
}
// deal with model fragments in this leaf
if (pleaf.efrags != null)
{
StoreEfrags(pleaf.efrags);
}
return;
}
// node is just a decision point, so go down the apropriate sides
mnode_t n = (mnode_t)node;
// find which side of the node we are on
mplane_t plane = n.plane;
double dot;
switch (plane.type)
{
case Planes.PLANE_X:
dot = _ModelOrg.X - plane.dist;
break;
case Planes.PLANE_Y:
dot = _ModelOrg.Y - plane.dist;
break;
case Planes.PLANE_Z:
dot = _ModelOrg.Z - plane.dist;
break;
default:
dot = Vector3.Dot(_ModelOrg, plane.normal) - plane.dist;
break;
}
int side = (dot >= 0 ? 0 : 1);
// recurse down the children, front side first
RecursiveWorldNode(n.children[side]);
// draw stuff
c = n.numsurfaces;
if (c != 0)
{
msurface_t[] surf = Client.cl.worldmodel.surfaces;
int offset = n.firstsurface;
if (dot < 0 - QDef.BACKFACE_EPSILON)
{
side = Surf.SURF_PLANEBACK;
}
else if (dot > QDef.BACKFACE_EPSILON)
{
side = 0;
}
for (; c != 0; c--, offset++)
{
if (surf[offset].visframe != _FrameCount)
{
continue;
}
// don't backface underwater surfaces, because they warp
if ((surf[offset].flags & Surf.SURF_UNDERWATER) == 0 && ((dot < 0) ^ ((surf[offset].flags & Surf.SURF_PLANEBACK) != 0)))
{
continue; // wrong side
}
// if sorting by texture, just store it out
if (_glTexSort.Value != 0)
{
if (!_IsMirror || surf[offset].texinfo.texture != Client.cl.worldmodel.textures[_MirrorTextureNum])
{
surf[offset].texturechain = surf[offset].texinfo.texture.texturechain;
surf[offset].texinfo.texture.texturechain = surf[offset];
}
}
else if ((surf[offset].flags & Surf.SURF_DRAWSKY) != 0)
{
surf[offset].texturechain = _SkyChain;
_SkyChain = surf[offset];
}
else if ((surf[offset].flags & Surf.SURF_DRAWTURB) != 0)
{
surf[offset].texturechain = _WaterChain;
_WaterChain = surf[offset];
}
else
{
DrawSequentialPoly(surf[offset]);
}
}
}
// recurse down the back side
RecursiveWorldNode(n.children[side == 0 ? 1 : 0]);
}
/// <summary>
/// R_SplitEntityOnNode
/// </summary>
static void SplitEntityOnNode(mnodebase_t node)
{
if (node.contents == Contents.CONTENTS_SOLID)
return;
// add an efrag if the node is a leaf
if (node.contents < 0)
{
if (_EfragTopNode == null)
_EfragTopNode = node as mnode_t;
mleaf_t leaf = (mleaf_t)(object)node;
// grab an efrag off the free list
efrag_t ef = Client.cl.free_efrags;
if (ef == null)
{
Con.Print("Too many efrags!\n");
return; // no free fragments...
}
Client.cl.free_efrags = Client.cl.free_efrags.entnext;
ef.entity = _AddEnt;
// add the entity link
// *lastlink = ef;
if (_LastObj is entity_t)
{
((entity_t)_LastObj).efrag = ef;
}
else
{
((efrag_t)_LastObj).entnext = ef;
}
_LastObj = ef; // lastlink = &ef->entnext;
ef.entnext = null;
// set the leaf links
ef.leaf = leaf;
ef.leafnext = leaf.efrags;
leaf.efrags = ef;
return;
}
// NODE_MIXED
mnode_t n = node as mnode_t;
if (n == null)
return;
mplane_t splitplane = n.plane;
int sides = Mathlib.BoxOnPlaneSide(ref _EMins, ref _EMaxs, splitplane);
if (sides == 3)
{
// split on this plane
// if this is the first splitter of this bmodel, remember it
if (_EfragTopNode == null)
_EfragTopNode = n;
}
// recurse down the contacted sides
if ((sides & 1) != 0)
SplitEntityOnNode(n.children[0]);
if ((sides & 2) != 0)
SplitEntityOnNode(n.children[1]);
}