Setting Up Your Project for the Leap Motion Controller

Before you can make use of the Leap Motion controller in Torque 3D you will need to download the Leap Motion SDK from their web site and extract it to a convenient directory. As of this writing you need to be invited into their developer program in order to gain access to their SDK.

Configure Your project.conf

With the Leap Motion SDK in place, you will need to modify your project's buildFiles/config/project.conf file in a text editor. The first step is to let Torque 3D's Project Generator know where the Leap Motion SDK is located. The easiest way to do this is to add the $LEAPMOTION_SDK_PATH global variable to the top of your project.conf file. For example:

$LEAPMOTION_SDK_PATH = "C:\Users\dwyand_2\Downloads\LeapMotion\Leap_Developer_Kit_0.7.1_Windows\Leap_SDK";

You may also create a Windows environmental variable named TORQUE_LEAPMOTION_PATH that also provides an absolute path to the Leap Motion SDK. Going this route doesn't store the path within the project.conf file, which may be required if multiple developers are working on the same project.

The second addition to your project.conf file is a reference to the Torque 3D's Project Generator module for the Leap Motion. Add the following between the Torque3D::beginConfig() and Torque3D::endConfig() lines:

    // Include Leap Motion module
    includeModule( 'leapMotion' );

With these changes in place you may run your project's generateProjects.bat file to rebuild the various Visual Studio files.

Example project.conf

Here is a complete example of a project.conf file with all of the required changes:

<?php

// Set this true to enable hifi networking instead of standard.
// In general ... hifi is designed to better deal with fast
// moving players in close proximity to each other, such as
// a racing game.
$TORQUE_HIFI_NET = false;

// Set this to true to enable the ExtendedMove class.  This
// allows the passing of absolute position and rotation input
// device information from the client to the server.
$TORQUE_EXTENDED_MOVE = false;

// Our path to the Leap Motion SDK:
$LEAPMOTION_SDK_PATH = "C:\Users\dwyand_2\Downloads\LeapMotion\Leap_Developer_Kit_0.7.1_Windows\Leap_SDK";

// Configure Torque 3D
Torque3D::beginConfig( "win32", "MarbleMotion" );

    // Include Leap Motion module
    includeModule( 'leapMotion' );
        
    // Enable for optional minidump debugging support
    // addProjectDefine( 'TORQUE_MINIDUMP' );
        
Torque3D::endConfig();

?>

Required DLLs

Before you may run your freshly compiled game you will need to include the appropriate Leap Motion DLLs with your game's executable. As of the Leap Motion SDK v0.7.1 these files are located in the Leap_SDK/lib/x86 directory. Specifically you should copy the Leap.dll (the release library) and Leapd.dll (the debug library) into the same directory as your game's executable. When it comes time to release your game you only need to include the Leap.dll library.