[Help] How to use Manual mesh correctly

Hi, guys i have a problem when i am doing manual mesh, so i think if anyone can help me. I was trying to use manual mesh to create a triangle geometry for collision, but it jump out an access violation reading error message during run time, seems mScene->createSceneGeometry(new NxOgre::TriangleGeometry(mmsh), Matrix44_Identity); create faild. Does anyone use manual mesh? How can i use it correctly?

Here is my code

NxOgre::ManualMesh manual;
manual.begin(NxOgre::Enums::MeshType_Triangle, 3);
manual.vertex(NxOgre::Vec3(-2, 0, -2));
manual.vertex(NxOgre::Vec3(2, 0, -2));
manual.vertex(NxOgre::Vec3(-2, 0, 2));
NxOgre::Mesh* mmsh=manual.end();

mScene->createSceneGeometry(new NxOgre::TriangleGeometry(mmsh), Matrix44_Identity);


Violation reading message

No one? I have seen the content of the mesh triangle i created, i found the content seems filled with 0x000000, for example when i manual create triangle i give NxOgre::Enums::MeshType_Triangle for mesh type, but the result become MeshType_Unknow and some content are 0x000000, so i guess this is the reason cause it fail to create scene geometry. Why? Is manual mesh not implement yet? Anyone has the problem like this?

You need some indicies.


Some normals would be good too.

You need some indicies.


Some normals would be good too.

what index can you make example please？i am actually making triangle collision mesh for my terrain
,that's why I need to use manual mesh.

Your just giving PhysX a bunch of vertices. How is it supposed to know what your mesh looks like?

Give it some indicies/indexes for the triangles, and some normals to tell PhysX which way the triangles face.

Your just giving PhysX a bunch of vertices. How is it supposed to know what your mesh looks like?

Give it some indicies/indexes for the triangles, and some normals to tell PhysX which way the triangles face.

I tried but still have same problem

Let's have a look at your code then.

Let's have a look at your code then.


NxOgre::ManualMesh manual;
manual.begin(NxOgre::Enums::MeshType_Triangle, 3);
manual.vertex(NxOgre::Vec3(-2, 0, -2));
manual.index(0);
manual.normal(0.0f, 1.0f, 0.0f);
manual.vertex(NxOgre::Vec3(2, 0, -2));
manual.index(1);
manual.normal(0.0f, 1.0f, 0.0f);
manual.vertex(NxOgre::Vec3(-2, 0, 2));
manual.index(2);
manual.normal(0.0f, 1.0f, 0.0f);
NxOgre::Mesh* mmsh=manual.end();

NxOgre::TriangleGeometry* tri=new NxOgre::TriangleGeometry(mmsh);

mScene->createSceneGeometry(new NxOgre::TriangleGeometry(mmsh), Matrix44_Identity);


I would estimate you would need more than one triangle.

I would estimate you would need more than one triangle.

Why need more than one triangle, can't i just create only one triangle for collision?