Bullet physics animator

[dlangdev]

hey gbox,

can you post your updated irrbullet project file up. i can't build the version posted by the author. version too old, i guess.

thanks.

[wuallen]

I compile these code, but I get very bad effect. the pin becames dark, and FPS is very low, about 5 or 6, did anyone else get the same bad effect? I don't know where is the problem?

[gbox]

hey wuallen

complie with release option then speed up

i meet same dark problem but another project work well i dont now why? too

dlangdev here is soruce

http://jga.or.kr/sboard/download.asp?bo ... ta&idx=114

[full.metal.coder]

I've never managed to get this thing working so I ended writing a Bullet wrapper using a completely different approach. You may be interested in having a look at the code : http://first-king.svn.sf.net/svnroot/fi ... k/physics/

It works quite well but unfortunatley requires to patch Bullet for performance and flexibility reasons (mesh data sharing, physics aware of animations, character controller, ... ). I've reported the issues on Bullet forums and task tracker so it should be integrated soon.

[wuallen]

i meet same dark problem but another project work well i dont now why? too

I got the answer of the dark problem.

http://irrlicht.sourceforge.net/phpBB2/ ... p?p=165929[/u]

[wuallen]

I've never managed to get this thing working so I ended writing a Bullet wrapper using a completely different approach. You may be interested in having a look at the code : http://first-king.svn.sf.net/svnroot/fi ... k/physics/

It works quite well but unfortunatley requires to patch Bullet for performance and flexibility reasons (mesh data sharing, physics aware of animations, character controller, ... ). I've reported the issues on Bullet forums and task tracker so it should be integrated soon.

thank your replying. At least I got the clue of my slow problem. It is really a problem of mine, I have been so worried about this. can you explain how to patch this problem, for me, more waiting more pains.

[EvilAlex]

Thanks to the author of the code!
I haven't use this exact code, but rather, used it as a tutorial to write my own. Bullet has very poor documentation (or it's just me too lazy to search), so this code helped a lot.
Thanks again! =)

[go]

OK

I edit first Irrlicht and bullet animator sourcecode for Irrlicht 1.4.2 and bullet 2.7.2 ver in visualc++ 2008

i up the sourcecode.

before compile this code, you shoud make your Extras\GIMPACT\include folder in your visual studio include option.

and I'll make serialized ver source either

thanks


http://xn--u8jua7b1498a.jp/dl

[go]

I made Bullet Physics Class figure

http://xn--u8jua7b1498a.jp/wiki/images/ ... hysics.jpg

[Jiang]

OK

I edit first Irrlicht and bullet animator sourcecode for Irrlicht 1.4.2 and bullet 2.7.2 ver in visualc++ 2008

i up the sourcecode.

before compile this code, you shoud make your Extras\GIMPACT\include folder in your visual studio include option.

and I'll make serialized ver source either

thanks


http://xn--u8jua7b1498a.jp/dl

Hey go,

I downloaded the above zip file, but failed to open it. My 7-zip reported me invalid zip file format. Tried several times but had no luck.

Would you please check the zip file again.

Thank you for your time.

[wEEp]

from where do i get the Bullet library? ;O

[link3rn3l]

100% working

compiled with irrlicht SVN:

http://code.google.com/p/fenixpack/downloads/list


thanks for the wrapper..!!!

[enif]

Hi!

Thes animator code works great with Irrlicht 1.6 and Bullet 2.75. Thanks! Great work!

Because I am using 513x513 terrain nodes in my game, I had to change this method in CBulletPhysicsUtils.cpp:

Code: Select all

btTriangleMesh * ConvertTerrainToBulletTriangleMesh(
    irr::scene::ITerrainSceneNode* terrain,
    const irr::core::vector3df& Scaling)
      {
         //mesh converting

            btVector3 vertices[3];
            irr::u32 j,k,index,numVertices,numIndices;
            irr::u16* mb_indices16;
			irr::u32* mb_indices32;
			video::E_INDEX_TYPE indicesType;
            btTriangleMesh *triangleMesh;

            irr::scene::ITerrainSceneNode *pTerrain = terrain;


			scene::CDynamicMeshBuffer* buffer = 0;

			numVertices = terrain->getMesh()->getMeshBuffer(0)->getVertexCount();
			if (numVertices <= 65536)
			{
				//small enough for 16bit buffers
				buffer = new scene::CDynamicMeshBuffer(video::EVT_2TCOORDS, video::EIT_16BIT);
			}
			else
			{
				//we need 32bit buffers
				buffer = new scene::CDynamicMeshBuffer(video::EVT_2TCOORDS, video::EIT_32BIT);
			}

            pTerrain->getMeshBufferForLOD(*buffer, 0);

            numVertices = buffer->getVertexCount();
            numIndices = buffer->getIndexCount();
			indicesType = buffer->getIndexType();

			if (indicesType == video::EIT_16BIT)
			{
				mb_indices16 = buffer->getIndices();

				irr::video::S3DVertex2TCoords* mb_vertices = (irr::video::S3DVertex2TCoords*)buffer->getVertices();
				btTriangleMesh *pTriMesh = new btTriangleMesh();
				irr::core::vector3df scaling = Scaling;

				for(j = 0; j < numIndices; j += 3)
				{ 
					//index into irrlicht data
					for (k = 0; k < 3; k++)
					{
						index = mb_indices16[j+k];

						// we apply scaling factor directly to verticies
						vertices[k] = btVector3(mb_vertices[index].Pos.X*scaling.X,
						mb_vertices[index].Pos.Y*scaling.Y,
						mb_vertices[index].Pos.Z*scaling.Z);
					}

					pTriMesh->addTriangle(vertices[0], vertices[1], vertices[2]);
				}

				triangleMesh = pTriMesh;
			}
			else if (indicesType == video::EIT_32BIT)
			{
				mb_indices32 = (u32*)buffer->getIndices();

				irr::video::S3DVertex2TCoords* mb_vertices = (irr::video::S3DVertex2TCoords*)buffer->getVertices();
				btTriangleMesh *pTriMesh = new btTriangleMesh();
				irr::core::vector3df scaling = Scaling;

				for(j = 0; j < numIndices; j += 3)
				{ 
					//index into irrlicht data
					for (k = 0; k < 3; k++)
					{
						index = mb_indices32[j+k];

						// we apply scaling factor directly to verticies
						vertices[k] = btVector3(mb_vertices[index].Pos.X*scaling.X,
						mb_vertices[index].Pos.Y*scaling.Y,
						mb_vertices[index].Pos.Z*scaling.Z);
					}

					pTriMesh->addTriangle(vertices[0], vertices[1], vertices[2]);
				}

				triangleMesh = pTriMesh;
			}
			else
			{
				// bad indices type!
				buffer->drop();

				return NULL;
			}

			buffer->drop();

			return  triangleMesh;
      }

Works for me...

The old code works perfectly for 256x256 terrains (aka 65536 vertices limit), but for anything bigger, you are lost.