Bug ? I get crash on CallBack B3worldDef using b3CreateMeshShape.

[Ronniko]

float WorldCallBack(float frictionA, uint64_t userMaterialIdA,
float frictionB, uint64_t userMaterialIdB)
{ return frictionB; }

b3WorldDef B3worldDef;
B3worldDef.restitutionCallback = WorldCallBack;

//than i created b3CreateBoxMesh fine.
b3MeshData* mesh = b3CreateBoxMesh(0,2f,0,60f,10f,60f,true);

//created fine b3CreateMeshShape
b3CreateMeshShape( b3BodyId bodyId, const b3ShapeDef* def, const b3MeshData* mesh, b3Vec3 scale );

My program crash when HullBox touch BoxMesh, than do WorldCallBack and crash.

If i do
B3worldDef.restitutionCallback = NULL;

i not get crash. All work fine. HullBox collided with BoxMesh.

[erincatto]

b3MeshData must remain in scope. The data is not cloned into Box3D.

[Ronniko]

b3MeshData must remain in scope.

What does this mean? I don't understand the point.
Please give a more detailed answer and advice on how to do it right.
And how to get a working right, my callback with b3MeshData ?

[erincatto]

Give me the call stack of your crash.

[Ronniko]

Its debug mode Box3D b3RecPlayer_SetDebugShapeCallbacks ? I dont using debug mode Box3D. I want read docs about debug mode box3D.
Or simple windows event crash error info ?

[erincatto]

Make a build with debug info and give me the call stack.

[Ronniko]

I write on fasm assembler 32bits. Problem run in debug mode box3D.
I looking my crash in IDA Pro. My WorldCallBack work fine.
float WorldCallBack(float frictionA, uint64_t userMaterialIdA,
float frictionB, uint64_t userMaterialIdB)
{ return frictionB; }

I get crash in b3Contact_GetData asm command AND [EBX+44h],FFEFFFFFh

[Ronniko]

EBX = 0Ch its wrong value. Must be some address.

[Ronniko]

Can I replace callback and using b3World_GetContactEvents instead callback ?
It's almost the same thing, isn't it?