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Leap Motion input device support

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DavidWyand-GG 2013-01-23 14:38:13 -05:00
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Engine/source/platform/input/leapMotion/leapMotionUtil.cpp Normal file
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//-----------------------------------------------------------------------------
// Copyright (c) 2012 GarageGames, LLC
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//-----------------------------------------------------------------------------
#include "platform/input/leapMotion/leapMotionUtil.h"
namespace LeapMotionUtil
{
void convertPosition(const Leap::Vector& inPosition, F32& x, F32& y, F32& z)
{
// Convert to Torque coordinates. The conversion is:
//
// Motion Torque
// x y z --> x -z y
x = inPosition.x; // x = x
y = -inPosition.z; // y = -z
z = inPosition.y; // z = y;
}
void convertPosition(const Leap::Vector& inPosition, Point3F& outPosition)
{
// Convert to Torque coordinates. The conversion is:
//
// Motion Torque
// x y z --> x -z y
outPosition.x = inPosition.x; // x = x
outPosition.y = -inPosition.z; // y = -z
outPosition.z = inPosition.y; // z = y;
}
void convertHandRotation(const Leap::Hand& hand, MatrixF& outRotation)
{
// We need to convert from Motion coordinates to
// Torque coordinates. The conversion is:
//
// Motion Torque
// a b c a b c a -c b
// d e f --> -g -h -i --> -g i -h
// g h i d e f d -f e
const Leap::Vector& handToFingers = hand.direction();
Leap::Vector handFront = -handToFingers;
const Leap::Vector& handDown = hand.palmNormal();
Leap::Vector handUp = -handDown;
Leap::Vector handRight = handUp.cross(handFront);
outRotation.setColumn(0, Point4F( handRight.x, -handRight.z, handRight.y, 0.0f));
outRotation.setColumn(1, Point4F( -handFront.x, handFront.z, -handFront.y, 0.0f));
outRotation.setColumn(2, Point4F( handUp.x, -handUp.z, handUp.y, 0.0f));
outRotation.setPosition(Point3F::Zero);
}
void calculateHandAxisRotation(const MatrixF& handRotation, const F32& maxHandAxisRadius, Point2F& outRotation)
{
const VectorF& controllerUp = handRotation.getUpVector();
outRotation.x = controllerUp.x;
outRotation.y = controllerUp.y;
// Limit the axis angle to that given to us
if(outRotation.len() > maxHandAxisRadius)
{
outRotation.normalize(maxHandAxisRadius);
}
// Renormalize to the range of 0..1
if(maxHandAxisRadius != 0.0f)
{
outRotation /= maxHandAxisRadius;
}
}
void convertPointableRotation(const Leap::Pointable& pointable, MatrixF& outRotation)
{
// We need to convert from Motion coordinates to
// Torque coordinates. The conversion is:
//
// Motion Torque
// a b c a b c a -c b
// d e f --> -g -h -i --> -g i -h
// g h i d e f d -f e
Leap::Vector pointableFront = -pointable.direction();
Leap::Vector pointableRight = Leap::Vector::up().cross(pointableFront);
Leap::Vector pointableUp = pointableFront.cross(pointableRight);
outRotation.setColumn(0, Point4F( pointableRight.x, -pointableRight.z, pointableRight.y, 0.0f));
outRotation.setColumn(1, Point4F( -pointableFront.x, pointableFront.z, -pointableFront.y, 0.0f));
outRotation.setColumn(2, Point4F( pointableUp.x, -pointableUp.z, pointableUp.y, 0.0f));
outRotation.setPosition(Point3F::Zero);
}
}