I've written a simple vec3 class, which implements the */+- operators:
class vec3
{
public:
vec3():
x(0.0f),y(0.0f),z(0.0f)
{}
vec3(float ix, float iy, float iz):
x(ix),y(iy),z(iz)
{}
vec3 operator+(const vec3& v){
vec3 vec(x+v.x,y+v.y,z+v.z);
return vec;
}
vec3 operator-(const vec3& v){
vec3 vec(x-v.x,y-v.y,z-v.z);
return vec;
}
vec3 operator*(const float& s){
vec3 vec(x*s,y*s,z*s);
return vec;
}
vec3 operator/(const float& d){
flot div = 1.0f/d;
vec3 vec(x*div,y*div,z*div);
return vec;
}
float x, y, z;
};
I wish to bind these operators via luabridge, in some way similar to:
getGlobalNamespace(L)
.beginClass<vec3>("vec3");
.addConstructor<void (*) (const float&, const float& const float&)>()
.addData ("x", &vec3::x)
.addData ("z", &vec3::z)
.addData ("z", &vec3::y)
.addFunction("__add",(vec3*(vec3::*)(vec3)) &vec3::operator+);
.addFunction("__sub",(vec3*(vec3::*)(vec3)) &vec3::operator-);
.addFunction("__mul",(vec3*(vec3::*)(float)) &vec3::operator*);
.addFunction("__div",(vec3*(vec3::*)(float)) &vec3::operator/);
.endClass();
So that I can then call the functions in lua like so:
onUpdate = function (e, dt)
e.position = e.position + e.velocity * dt;
end
When I place a breakpoint in the *operator for the vec3 class, it does hit it, but the rhs float is undefined.
If I change the lua code to:
onUpdate = function (e, dt)
e.position = e.position + e.velocity
end
Then the rhs vec3 is also undefined. So it looks like the argument is not being passed correctly.
I then changed the registration to:
getGlobalNamespace(L)
.beginClass<vec3>("vec3");
.addConstructor<void (*) (const float&, const float& const float&)>()
.addData ("x", &vec3::x)
.addData ("z", &vec3::z)
.addData ("z", &vec3::y)
.addFunction("__add",(vec3*(vec3::*)(const vec3&)) &vec3::operator+);
.addFunction("__sub",(vec3*(vec3::*)(const vec3&)) &vec3::operator-);
.addFunction("__mul",(vec3*(vec3::*)(const float&)) &vec3::operator*);
.addFunction("__div",(vec3*(vec3::*)(const float&)) &vec3::operator/);
.endClass();
But now the member data of the vec3, or the float argument is undefined. If I move past this breakpoint, luabdridge throws the following exception:
Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.
The only thing I can think of is that I have somehow not registered the function correctly.
So my question is this: How do I bind the operator correctly, and ensure that the argument type is correct, and how do I correctly call it in lua?
