NewtonConvexHull problem

[Guest]

We are working on a game for a class using the newton engine for physics. We are having trouble getting the NewtonConvexHull to fit around our milkshape model. If anyone could help us that would be great.

[ASD]

I can help you, I'm using Newton engine with Irrlicht and have sucsessfully passed throu many problems, and convex hulls to What is the problem?

[EvilleJedi]

I don't know what the original posters problem is but I am trying to get the vertice cloud information from the mesh

Code: Select all

scene::IMeshBuffer*      mb      = NULL;
video::S3DVertex*      mb_vertices   = NULL;
int bufferCount = mesharray[1]->getMesh(0)->getMeshBufferCount ( );
		for ( int i = 0; i < bufferCount; i++ )
		{
			mb = mesharray[1]->getMesh(0)->getMeshBuffer ( i );
			mb_vertices = (video::S3DVertex*)mb->getVertices ( );
		}
	void *vertex = mb->getVertices(); 
	core::vector3df vertices;
	Float* Verts;
        // find center of vertices in array
        for(u16 j=0; j < mb->getVertexCount(); j++)
	{
            vertices = ((video::S3DVertex*)vertex)[j].Pos;	
	    //Verts=????
	}
PObjectArray[1]->collision = NewtonCreateConvexHull(nWorld, mb->getVertexCount(),Verts, 128, NULL);

even though its sorta cobbled together from other posts
that is where I get stuck, how to convert from the vertices themselves to the data in memory

[hansmbakker]

asd, is your code open source?

i'd like to use the newton engine with it's vehicles and buoyancy but i don't know where to start. It would be a great help if I could have a look in your project and your code.

I have read merciors tutorial but i still find it very hard, because there are so few 'bridging-tutorials' for combinig newton and irrlicht. I also don't exactly understand how to use matrices and vertices which you have to use to fil a NewtonConvexHull.

Please, can I have a look in you code?

[Guest]

This is the code sniuppet which shows how I creates NewtonConvexHull
i_WranglerRigidBodyMesh = smgr->getMesh("D:\\3DDevelop\\irrlicht-0.7\\examples\\02.Quake3Map\\Debug\\media\\Wrangler\\wranglerrigidbody.3ds");
int imb, v_c, i_c;
int c1i;
IMeshBuffer *m_b;
u16* indices;
float vert[1236][3];
v_c=0;
for (imb=0; imb<i_WranglerRigidBodyMesh->getMesh(0)->getMeshBufferCount(); imb++)
{
m_b = i_WranglerRigidBodyMesh->getMesh(0)->getMeshBuffer(imb);
video::S3DVertex* vertices = (irr::video::S3DVertex*)m_b->getVertices();
i_c = m_b->getIndexCount();
indices = m_b->getIndices();

for (i_c=0; i_c<m_b->getIndexCount(); i_c++)
{
c1i = indices[i_c];
vert[i_c][0] = vertices[c1i].Pos.X;
vert[i_c][1] = vertices[c1i].Pos.Y;
vert[i_c][2] = vertices[c1i].Pos.Z;
v_c++;
}
}

n_WranglerCol = NewtonCreateConvexHull(nWorld, 1236, &vert[0][0], 12, NULL);

vert array must be [x][3], where x - number of indeces(or vertices, I don't remember) in your mesh

[keless]

"vert array must be [x][3], where x - number of indeces(or vertices, I don't remember) in your mesh "

it looks like its the number of indices, since 3 would be the verts (x,y,z)