im having quite a small problem yet i dont know the solution to.
i have a c# application, and a managed c++ dll. in the c++ dll i have a native implementation of a funtion, and in the managed c++ i wrap that native implementation with another class.
and i pass form c# to managed c++ class 2 objects with abunch of variables in each.
that managed c++ class intrun passes these values to the native class, calculates something, assigns the result back in variables. and as soon i get mack to my managed c++ class, from the native class, these values disaplear, and im back with my old values.
that will result in old values in c#.
here is my code:
managed mix c++
public __nogc class tkRigidBody { ... void GetTransformationsSeperate(float p11, float p12, float p13, float m11, float m12, float m13, float m21, float m22, float m23, float m31, float m32, float m33) { m_Transformations = m_RigidBody->GetTransform(); p11 = m_Transformations.pos[0]; p12 = m_Transformations.pos[1]; p13 = m_Transformations.pos[2]; m_Position[0] = m_Transformations.pos[0]; m_Position[1] = m_Transformations.pos[1]; m_Position[2] = m_Transformations.pos[2]; m11 = m_Transformations.rot[0][0]; m12 = m_Transformations.rot[0][1]; m13 = m_Transformations.rot[0][2]; m21 = m_Transformations.rot[1][0]; m22 = m_Transformations.rot[1][1]; m23 = m_Transformations.rot[1][2]; m31 = m_Transformations.rot[2][0]; m32 = m_Transformations.rot[2][1]; m33 = m_Transformations.rot[2][2]; } }; /************************************************** MANAGED FOR TOKAMAK PHYSICS **************************************************/ public __gc class tkMRigidBody { ... void GetTransformations(ngVector3 *position, ngMatrix *rotation) { t->GetTransformationsSeperate(position->X, position->Y, position->Z, rotation->M11, rotation->M12, rotation->M13, rotation->M21, rotation->M22, rotation->M23, rotation->M31, rotation->M32, rotation->M33); } }; |
and here is my c# code that i call the "GetTransformations" function from the "tkMRigidBody" managed class.
m_RigidBody.GetTransformations(m_vPosition, m_mRotation); |
so why r my variables loosing there values what am i doing wrong
problem passigng variables from c# to mined C++
Hakop000
void GetTransformationsSeperate(float &p11, float &p12, float &p13,
float &m11, float &m12, float &m13,
float &m21, float &m22, float &m23,
float &m31, float &m32, float &m33)
BruceH12
and notice that im using "position->X" to pass to the function.
Seth M. Livingston
Only lvalues can be bound to non-const references. I guess ngVector3::X etc. are properties where the getter returns an rvalue. You could use autos to hold the values an assign back to the properties (which would call the setter). E.g.:
void GetTransformations(ngVector3 *position, ngMatrix *rotation)
{
float posX, posY, posZ, rotM11 ... ; // all LValues
t->GetTransformationsSeperate(posX, posY, posZ, rotM11, ..);
position->X = posX; // invokes setter
// ...
}
-hg