Q3bsp

Demonmage · Post by **Demonmage** » Tue Sep 09, 2003 5:28 am

Hi,people!
Do its level in GtkRadiant 1.2.11, load in Irrlitch 0.4 and see that halfs of triangles no. I think this because of CULL FACE.
Please help.

niko · Post by **niko** » Tue Sep 09, 2003 8:32 am

It seems that some people have this problem. Is it getting better when you disable backface culling? Like yourQuakeSceneNode->setMaterialFlag(video::EMF_BACK_FACE_CULLING, false); ?

WhytWulf · Post by **WhytWulf** » Wed Sep 10, 2003 1:46 am

Nope, I just played around with it and I got the same result.. actually not quite true. first time I put my q3node->setMaterialFlag(video::EMF_BACK_FACE_CULLING, false); in teh wrong place... got a nice crash out of it

second time in the right place, but no visiable change. It looks almost like the vertexs are getting sorted wrong, causing the some face normals to point inside a brush while others point the correct why ..hmmm

WhytWulf · Post by **WhytWulf** » Wed Sep 10, 2003 2:01 am

I just used a different BSP compilier, it fixed all the problems and seems better too

http://www.inficad.com/~mnichol/dummies/index

It works and is simple to understand..

Demonmage · Post by **Demonmage** » Wed Sep 10, 2003 5:49 am

WhytWulf wrote:I just used a different BSP compilier, it fixed all the problems and seems better too

http://www.inficad.com/~mnichol/dummies/index

It works and is simple to understand..

Please, put tools me on mail, but that reference does not work!
tsantsinger@mail.ru

rt · Post by rt » Fri Dec 12, 2003 12:17 am

WhytWulf wrote:I just used a different BSP compilier, it fixed all the problems and seems better too
http://www.inficad.com/~mnichol/dummies/index
It works and is simple to understand..

i think that q3map2 is actually the compiler that GtkRadiant uses. i came across the problem you mentioned of a bsp level being loaded with only half of it's triangles showing. the following image is a simple hollow box room created in gtkRadiant and exported to bsp then loaded in irrlicht

i started playing around with the command line switches and came up with a solution that seems to work. it seems the problem is that the first bsp build option in gtkradiant has the -meta command which apparently doesn't work well with irrlicht. what i did was create my own .bat files to create the bsp like so:
build_basic_bsp.bat

Code: Select all

 "C:/Program Files/GtkRadiant-1.3/q3map2" -v -game quake3 -fs_basepath "C:/Program Files/Quake III Arena/" "C:/Program Files/Quake III Arena/baseq3/maps/my_irr_map.map" > "C:/Program Files/GtkRadiant-1.3/junk.txt"
pause

basically i jus removed the -meta switch

.. note that this does not create any lighting effects. if you want lighting then create another .bat with the -light switch, then run the basic_bsp.bat first followed by the lighting.bat file.(http://www.teamtomko.com/lighting_bsp.jpg) for more info read this http://shaderlab.com/q3map2/manual/

here is a shot of the same level without the triangle trouble

niko · Post by **niko** » Fri Dec 12, 2003 9:38 am

Ah, cool. Finally a solution for this problem. We'll point the next 1000 users with this question to this thread.

SkyFlash · Post by **SkyFlash** » Sun Dec 14, 2003 6:34 pm

Is is possible to find the cause for this bug and fix it in Irrlicht?
I am not a 3D programmer, but I can debug fairly well, so if someone will point me in the right direction I may find it. I am a complete Irrlicht newbie though so I will have to go through reading the source code first.

Its really an annoying bug, cause I am currently lacking the Q3 editor and the bsp tool to fix it for me... I am on dialup, and have problems downloading a 34MB file...

SkyFlash

niko · Post by **niko** » Wed Jan 21, 2004 11:02 am

SkyFlash wrote:Is is possible to find the cause for this bug and fix it in Irrlicht?

Last night, I made a long debugging session, and I've found the bug. I'll include a fix into the next release of the engine, but for all of you who can't wait, I'll post the corrected code into here. In CQ3LevelMesh.cpp, there is a method called CQ3LevelMesh::constructMesh(). In the big switch inside, replace the case 3 and case 1 with the following code:

Code: Select all

case 3: // mesh vertices
			case 1: // normal polygons
				{
					for (s32 tf=0; tf<Faces[i].numMeshVerts; tf+=3)
					{
						s32 idx = meshBuffer->getVertexCount();
						s32 vidxes[3];

						vidxes[0] = MeshVerts[Faces[i].meshVertIndex + tf +0] 
							+ Faces[i].vertexIndex;
						vidxes[1] = MeshVerts[Faces[i].meshVertIndex + tf +1] 
							+ Faces[i].vertexIndex;
						vidxes[2] = MeshVerts[Faces[i].meshVertIndex + tf +2]
							+ Faces[i].vertexIndex;

						// add all three vertices

						for (s32 vu=0; vu<3; ++vu)
						{
							video::S3DVertex2TCoords currentVertex;
							tBSPVertex *v = &Vertices[vidxes[vu]];

							//currentVertex.Color = video::SColor(v->color[3], v->color[0], v->color[1], v->color[2]);
							currentVertex.Color.set(255,255,255,255);

							currentVertex.Pos.X = v->vPosition[0];
							currentVertex.Pos.Y = v->vPosition[2];
							currentVertex.Pos.Z =  v->vPosition[1];
							currentVertex.Normal.X = v->vNormal[0];
							currentVertex.Normal.Y = v->vNormal[2];
							currentVertex.Normal.Z = v->vNormal[1];
							currentVertex.TCoords.X = v->vTextureCoord[0];
							currentVertex.TCoords.Y = v->vTextureCoord[1];
							currentVertex.TCoords2.X = v->vLightmapCoord[0];
							currentVertex.TCoords2.Y = v->vLightmapCoord[1];

							meshBuffer->Vertices.push_back(currentVertex);
						}

						// add indexes

						meshBuffer->Indices.push_back(idx);
						meshBuffer->Indices.push_back(idx+1);
						meshBuffer->Indices.push_back(idx+2);
					}
				}
				break;

buhatkj · Post by **buhatkj** » Wed Jan 21, 2004 5:15 pm

wow...where do you get these levels? i have been having trouble finding good free levels on the web.
-Ted

niko · Post by **niko** » Wed Jan 21, 2004 7:27 pm

I found it on planetquake.com

fretnoize · Post by **fretnoize** » Tue Feb 03, 2004 8:15 am

does this problem still happen sometimes with more complicated geometry, regardless of removing the -meta tag with q3bsp2? I started adding more complex geometry into my scene then noticed triangles disappearing on SOME faces, definately not 1/2 of them like the -meta problem, but occasionally. I can post a screenshot if needed. I'm wondering if my problem is related to this or if its caused entirely by something else.

niko · Post by **niko** » Tue Feb 03, 2004 10:53 am

Did you apply the patch I posted above? And you still have missing faces?

fretnoize · Post by **fretnoize** » Tue Feb 03, 2004 11:18 am

No, I haven't applied the patch yet.
Sorry for the confusion, I was basically asking if these problems still occur ocasionally when you haven't installed the patch, but instead you are using the posted work-around, which was to remove the -meta flag from the q3map2 command line options.

I guess I'll try installing the patch anyway. Was a little hesitant, since I'm pretty new to the engine, didn't want to end up breaking something, heh

fretnoize · Post by **fretnoize** » Tue Feb 03, 2004 12:51 pm

My geometry looks fine with the patch installed.

So if anyone is using the work-around posted, be aware that the problem can still occur. I'd recommend installing the patch

Irrlicht Engine

Q3bsp

Q3bsp

half a solution to a half triangle problem

wow, nice level!