World Render Method (c++)

[Jorns2]

Hi, i started programming my game with c++. When i tried to load context,world,window everything is ok. When i call world->Update i give error: attempt to index world a nil value or something like this.

. In definition is virtual void Render();//lua. If i understand this good world->Render method is executed only in .lua script? Why ?

This is caused when i Load map in c++..

 

Thanks for answers.

[Ma-Shell]

9 hours ago, Jorns2 said:

In definition is virtual void Render();//lua. If i understand this good world->Render method is executed only in .lua script? Why ?

No, the comment "//lua" only means that this function is available in lua, as well, but that does not mean, that it is only executed in lua.

As for your other problem, it seems like you might not be setting the variable "world" before calling the Update-function or you are probably setting a function-local variable in the Start-function and then accessing a global variable in the update function or something like that. It's hard to say without seeing your code.

[Jorns2]

I have used a example script from documentation

#include "Leadwerks.h"

using namespace Leadwerks;
Model* model = NULL;
int main(int argc, const char *argv[])
{
    Leadwerks::Window* window = Leadwerks::Window::Create();
    Context* context = Context::Create(window);
    World* world = World::Create();
    Camera* camera = Camera::Create();
    camera->Move(0,0,-3);
    Light* light = DirectionalLight::Create();
    light->SetRotation(35,35,0);
        
    model = Model::Box();
    model->SetColor(0.0,0.0,1.0);

    while (true)
    {
        if (window->Closed() || window->KeyDown(Key::Escape)) return false;
    
        model->Turn(0,Leadwerks::Time::GetSpeed(),0);
        
        Leadwerks::Time::Update();
        world->Update();
        world->Render();
        context->Sync(false);

    }
    return 0;
}

and then:

 

[Ma-Shell]

I am pretty sure, the problem is coming from a LUA script of an object in your map, not from C++. That script has probably a world render or update hook, where it tries to access that variable.

[Jorns2]

now the same problem with window

[gamecreator]

Try removing everything from your project except for main.cpp if you only want to use C/C++.

[Jorns2]

 have removed all, only main.cpp remain

 

 

 

[Ma-Shell]

As I said, you should take a look at the objects on your map and the scripts they have attached!

[Jorns2]

perfect ! big thanks !

[Jorns2]

And now, when i have removed all script from scene and i want to control character in map how i assign a script to playable character from c++. Or how make it with LUA ?