Determine the Collision

[Kotov72rus]

Hi, there is a character "name=controller" and the object box "name=box_test".

How to determine the collision with box?, and then perform the desired action.

[macklebee]

If the box has an object script you can use the inherent collision callback (as shown in the template.lua script) and check the collision type given for the controller to drive the desired action. Granted this could be done using the collision callback in any other language as well.

[gamecreator]

The wiki has the simpler, clearer and more thorough example for Collisions Callback, here:

http://www.leadwerks.com/wiki/index.php?title=EntityCollisionCallback

[Kotov72rus]

Thanks

[Kotov72rus]

Why does not work this method?

Without checking the name, works with all objects, that are currently in contact with the object.

 

void _stdcall EntityCollisionCallback( TEntity entity0, TEntity entity1, byte* position, byte* normal, byte* force, flt speed )
{
if(GetEntityKey(entity1,"name")=="test_box")
{
 HideEntity(entity1);
}
}

//Entity box
SetEntityKey(test_box, "name","test_box");

//Controller
SetEntityKey(Controller, "name","controller");
SetEntityCallback(Controller,(byte*)EntityCollisionCallback,ENTITYCALLBACK_COLLISION);

[DaDonik]

The solution is pretty simple, but not obvious if your are not used to C++.

You just can't compare a char* and a string.

if(GetEntityKey(entity1,"name")=="test_box")

 

Where GetEntityKey(...) is returning a char*.

One way to do it would be to convert the char* to a string and then compare the two strings:

std::string strEntityName = GetEntityKey(entity1,"name");
if (strEntityName =="test_box")
{
.....
}

 

if the compiler complains about the std::string, just include the string header:

#include <string>