/// <summary>
/// Mod_LoadModel
/// Loads a model into the cache
/// </summary>
private ModelData Load(ModelData mod, Boolean crash, ModelType type)
{
var name = mod.Name;
if (mod.Type != type)
{
ModelData newMod = null;
switch (type)
{
case ModelType.Brush:
newMod = new BrushModelData(Host.Model.SubdivideSize, Host.RenderContext.NoTextureMip);
newMod.CopyFrom(mod);
break;
case ModelType.Alias:
newMod = new AliasModelData(Host.RenderContext.NoTextureMip);
newMod.CopyFrom(mod);
break;
case ModelType.Sprite:
newMod = new SpriteModelData(Host.RenderContext.NoTextureMip);
newMod.CopyFrom(mod);
break;
}
newMod.Name = mod.Name;
Remove(name);
mod = newMod;
Add(mod.Name, mod);
}
if (!mod.IsLoadRequired)
{
if (mod.Type == ModelType.Alias)
{
if (Host.Cache.Check(mod.cache) != null)
{
return(mod);
}
}
else
{
return(mod); // not cached at all
}
}
// Load the file
var buf = FileSystem.LoadFile(mod.Name);
if (buf == null)
{
if (crash)
{
Utilities.Error("Mod_NumForName: {0} not found", mod.Name);
}
return(null);
}
// Allocate a new model
Allocate(mod, buf);
return(mod);
}
private static int FanLength(AliasModelData m, int starttri, int startv)
{
mesh._Used[starttri] = 2;
var triangles = m.Triangles;
//last = &triangles[starttri];
var vidx = triangles[starttri].vertindex;
mesh._StripVerts[0] = vidx[startv % 3];
mesh._StripVerts[1] = vidx[(startv + 1) % 3];
mesh._StripVerts[2] = vidx[(startv + 2) % 3];
mesh._StripTris[0] = starttri;
mesh._StripCount = 1;
var m1 = vidx[(startv + 0) % 3];
var m2 = vidx[(startv + 2) % 3];
var lastfacesfront = triangles[starttri].facesfront;
// look for a matching triangle
nexttri:
for (var j = starttri + 1; j < mesh._AliasHdr.numtris; j++) //, check++)
{
vidx = triangles[j].vertindex;
if (triangles[j].facesfront != lastfacesfront)
{
continue;
}
for (var k = 0; k < 3; k++)
{
if (vidx[k] != m1)
{
continue;
}
if (vidx[(k + 1) % 3] != m2)
{
continue;
}
// this is the next part of the fan
// if we can't use this triangle, this tristrip is done
if (mesh._Used[j] != 0)
{
goto done;
}
// the new edge
m2 = vidx[(k + 2) % 3];
mesh._StripVerts[mesh._StripCount + 2] = m2;
mesh._StripTris[mesh._StripCount] = j;
mesh._StripCount++;
mesh._Used[j] = 2;
goto nexttri;
}
}
done:
// clear the temp used flags
for (var j = starttri + 1; j < mesh._AliasHdr.numtris; j++)
{
if (mesh._Used[j] == 2)
{
mesh._Used[j] = 0;
}
}
return(mesh._StripCount);
}
/// <summary>
/// Mod_LoadModel
/// Loads a model into the cache
/// </summary>
public ModelData LoadModel(ModelData mod, Boolean crash, ModelType type)
{
var name = mod.Name;
if (mod.Type != type)
{
ModelData newMod = null;
switch (type)
{
case ModelType.mod_brush:
newMod = new BrushModelData(Host.Model.SubdivideSize, Host.RenderContext.NoTextureMip);
newMod.CopyFrom(mod);
break;
case ModelType.mod_alias:
newMod = new AliasModelData(Host.RenderContext.NoTextureMip);
newMod.CopyFrom(mod);
break;
case ModelType.mod_sprite:
newMod = new SpriteModelData(Host.RenderContext.NoTextureMip);
newMod.CopyFrom(mod);
break;
}
newMod.Name = mod.Name;
ModelCache.RemoveAll(k => k.Name == name);
mod = newMod;
ModelCache.Add(mod);
}
if (!mod.IsLoadRequired)
{
if (mod.Type == ModelType.mod_alias)
{
if (Host.Cache.Check(mod.cache) != null)
{
return(mod);
}
}
else
{
return(mod); // not cached at all
}
}
//
// load the file
//
var buf = FileSystem.LoadFile(mod.Name);
if (buf == null)
{
if (crash)
{
Utilities.Error("Mod_NumForName: {0} not found", mod.Name);
}
return(null);
}
//
// allocate a new model
//
CurrentModel = mod;
mod.IsLoadRequired = false;
switch (BitConverter.ToUInt32(buf, 0)) // LittleLong(*(unsigned *)buf))
{
case ModelDef.IDPOLYHEADER:
LoadAliasModel(( AliasModelData )mod, buf);
break;
case ModelDef.IDSPRITEHEADER:
LoadSpriteModel(( SpriteModelData )mod, buf);
break;
default:
LoadBrushModel(( BrushModelData )mod, buf);
break;
}
return(mod);
}
/// <summary>
/// BuildTris
/// Generate a list of trifans or strips for the model, which holds for all frames
/// </summary>
private static void BuildTris(AliasModelData m)
{
var bestverts = new int[1024];
var besttris = new int[1024];
// Uze
// All references to pheader from model.c changed to _AliasHdr (former paliashdr)
//
// build tristrips
//
var stverts = m.STVerts;
var triangles = m.Triangles;
mesh._NumOrder = 0;
mesh._NumCommands = 0;
Array.Clear(mesh._Used, 0, mesh._Used.Length); // memset (used, 0, sizeof(used));
int besttype = 0, len;
for (var i = 0; i < mesh._AliasHdr.numtris; i++)
{
// pick an unused triangle and start the trifan
if (mesh._Used[i] != 0)
{
continue;
}
var bestlen = 0;
for (var type = 0; type < 2; type++)
{
for (var startv = 0; startv < 3; startv++)
{
if (type == 1)
{
len = mesh.StripLength(m, i, startv);
}
else
{
len = mesh.FanLength(m, i, startv);
}
if (len > bestlen)
{
besttype = type;
bestlen = len;
for (var j = 0; j < bestlen + 2; j++)
{
bestverts[j] = mesh._StripVerts[j];
}
for (var j = 0; j < bestlen; j++)
{
besttris[j] = mesh._StripTris[j];
}
}
}
}
// mark the tris on the best strip as used
for (var j = 0; j < bestlen; j++)
{
mesh._Used[besttris[j]] = 1;
}
if (besttype == 1)
{
mesh._Commands[mesh._NumCommands++] = bestlen + 2;
}
else
{
mesh._Commands[mesh._NumCommands++] = -(bestlen + 2);
}
var uval = Union4b.Empty;
for (var j = 0; j < bestlen + 2; j++)
{
// emit a vertex into the reorder buffer
var k = bestverts[j];
mesh._VertexOrder[mesh._NumOrder++] = k;
// emit s/t coords into the commands stream
float s = stverts[k].s;
float t = stverts[k].t;
if (triangles[besttris[0]].facesfront == 0 && stverts[k].onseam != 0)
{
s += mesh._AliasHdr.skinwidth / 2; // on back side
}
s = (s + 0.5f) / mesh._AliasHdr.skinwidth;
t = (t + 0.5f) / mesh._AliasHdr.skinheight;
uval.f0 = s;
mesh._Commands[mesh._NumCommands++] = uval.i0;
uval.f0 = t;
mesh._Commands[mesh._NumCommands++] = uval.i0;
}
}
mesh._Commands[mesh._NumCommands++] = 0; // end of list marker
ConsoleWrapper.DPrint("{0,3} tri {1,3} vert {2,3} cmd\n", mesh._AliasHdr.numtris, mesh._NumOrder, mesh._NumCommands);
mesh._AllVerts += mesh._NumOrder;
mesh._AllTris += mesh._AliasHdr.numtris;
}
