internal void ExtractPrimitives(MDL0Object* header, ref ElementDescriptor desc, byte** pOut, byte** pAssets)
{
int count;
uint index = 0, temp;
byte* pData = (byte*)header->PrimitiveData;
byte* pTemp = (byte*)pData;
ushort* indices = (ushort*)_indices.Address;
IMatrixNode[] cache = _polygon.Model._linker.NodeCache;
//Get element count for each primitive type
int d3 = 0, d2 = 0, d1 = 0;
uint p3 = 0, p2 = 0, p1 = 0;
uint[] p1arr = null, p2arr = null, p3arr = null;
bool newGroup = true;
PrimitiveGroup group = new PrimitiveGroup();
ushort id;
//Get counts for each primitive type, and assign face points
NextPrimitive:
byte cmd = *pTemp++;
if (cmd <= 0x38 && cmd >= 0x20)
{
if (newGroup == false)
{
_polygon._primGroups.Add(group);
group = new PrimitiveGroup() { _offset = (uint)((pTemp - 1) - pData) };
newGroup = true;
}
if (!group._nodes.Contains(id = *(bushort*)pTemp) && id != ushort.MaxValue)
group._nodes.Add(id);
}
//Switch by primitive type and increment as well so we can read the count.
switch ((GXListCommand)cmd)
{
//Fill weight cache
case GXListCommand.LoadIndexA: //Positions
group._nodeOffsets.Add(new NodeOffset((uint)(pTemp - pData) - group._offset, cache[*(bushort*)pTemp]));
//Set weight node for facepoint extraction
desc.SetNode(ref pTemp, (byte*)pData);
goto NextPrimitive;
case GXListCommand.LoadIndexB: //Normals
case GXListCommand.LoadIndexC: //UVs
group._nodeOffsets.Add(new NodeOffset((uint)(pTemp - pData) - group._offset, cache[*(bushort*)pTemp]));
pTemp += 4; //Skip
goto NextPrimitive;
case GXListCommand.LoadIndexD: //Lights
Console.WriteLine("There are lights in here!");
pTemp += 4; //Skip
goto NextPrimitive;
case GXListCommand.DrawQuads:
if (newGroup == true) newGroup = false;
d3 += (count = *(bushort*)pTemp) / 2 * 3;
group._headers.Add(new PrimitiveHeader() { Type = WiiPrimitiveType.Quads, Entries = (ushort)count });
break;
case GXListCommand.DrawTriangles:
if (newGroup == true) newGroup = false;
d3 += (count = *(bushort*)pTemp);
group._headers.Add(new PrimitiveHeader() { Type = WiiPrimitiveType.TriangleList, Entries = (ushort)count });
break;
case GXListCommand.DrawTriangleFan:
if (newGroup == true) newGroup = false;
d3 += ((count = *(bushort*)pTemp) - 2) * 3;
group._headers.Add(new PrimitiveHeader() { Type = WiiPrimitiveType.TriangleFan, Entries = (ushort)count });
break;
case GXListCommand.DrawTriangleStrip:
if (newGroup == true) newGroup = false;
d3 += ((count = *(bushort*)pTemp) - 2) * 3;
group._headers.Add(new PrimitiveHeader() { Type = WiiPrimitiveType.TriangleStrip, Entries = (ushort)count });
break;
case GXListCommand.DrawLines:
if (newGroup == true) newGroup = false;
d2 += (count = *(bushort*)pTemp);
group._headers.Add(new PrimitiveHeader() { Type = WiiPrimitiveType.Lines, Entries = (ushort)count });
break;
case GXListCommand.DrawLineStrip:
if (newGroup == true) newGroup = false;
d2 += ((count = *(bushort*)pTemp) - 1) * 2;
group._headers.Add(new PrimitiveHeader() { Type = WiiPrimitiveType.LineStrip, Entries = (ushort)count });
break;
case GXListCommand.DrawPoints:
if (newGroup == true) newGroup = false;
d1 += (count = *(bushort*)pTemp);
group._headers.Add(new PrimitiveHeader() { Type = WiiPrimitiveType.Points, Entries = (ushort)count });
break;
default:
_polygon._primGroups.Add(group);
goto Next; //No more primitives.
}
pTemp += 2;
//Extract facepoints here!
desc.Run(ref pTemp, pAssets, pOut, count, group, ref indices, _polygon.Model._linker.NodeCache);
goto NextPrimitive;
Next: //Create primitives
if (d3 > 0)
{ _triangles = new NewPrimitive(d3, BeginMode.Triangles); p3arr = _triangles._indices; }
else _triangles = null;
if (d2 > 0)
{ _lines = new NewPrimitive(d2, BeginMode.Lines); p2arr = _lines._indices; }
else _lines = null;
if (d1 > 0)
{ _points = new NewPrimitive(d1, BeginMode.Points); p1arr = _points._indices; }
else _points = null;
//Extract indices in reverse order, this way we get CCW winding.
Top:
switch ((GXListCommand)(*pData++))
{
case GXListCommand.LoadIndexA:
case GXListCommand.LoadIndexB:
case GXListCommand.LoadIndexC:
case GXListCommand.LoadIndexD:
pData += 4; //Skip
goto Top;
case GXListCommand.DrawQuads:
count = *(bushort*)pData;
for (int i = 0; i < count; i += 4)
{
p3arr[p3++] = index;
p3arr[p3++] = (uint)(index + 2);
p3arr[p3++] = (uint)(index + 1);
p3arr[p3++] = index;
p3arr[p3++] = (uint)(index + 3);
p3arr[p3++] = (uint)(index + 2);
index += 4;
}
break;
case GXListCommand.DrawTriangles:
count = *(bushort*)pData;
for (int i = 0; i < count; i += 3)
{
p3arr[p3++] = (uint)(index + 2);
p3arr[p3++] = (uint)(index + 1);
p3arr[p3++] = index;
index += 3;
}
break;
case GXListCommand.DrawTriangleFan:
count = *(bushort*)pData;
temp = index++;
for (int i = 2; i < count; i++)
{
p3arr[p3++] = temp;
p3arr[p3++] = (uint)(index + 1);
p3arr[p3++] = index++;
}
index++;
break;
case GXListCommand.DrawTriangleStrip:
count = *(bushort*)pData;
index += 2;
for (int i = 2; i < count; i++)
{
p3arr[p3++] = index;
p3arr[p3++] = (uint)(index - 1 - (i & 1));
p3arr[p3++] = (uint)((index++) - 2 + (i & 1));
}
break;
case GXListCommand.DrawLines:
count = *(bushort*)pData;
for (int i = 0; i < count; i++)
p2arr[p2++] = index++;
break;
case GXListCommand.DrawLineStrip:
count = *(bushort*)pData;
for (int i = 1; i < count; i++)
{
p2arr[p2++] = index++;
p2arr[p2++] = index;
}
index++;
break;
case GXListCommand.DrawPoints:
count = *(bushort*)pData;
for (int i = 0; i < count; i++)
p1arr[p1++] = index++;
break;
default: return;
}
pData += 2 + count * desc.Stride;
goto Top;
}
