Showing the changes to interface/src/HandControl.cpp (1 of 7 files). Show all
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| 1 | +// | |
| 2 | +// HandControl.cpp | |
| 3 | +// interface | |
| 4 | +// | |
| 5 | +// Created by Jeffrey Ventrella | |
| 6 | +// Copyright (c) 2013 High Fidelity, Inc. All rights reserved. | |
| 7 | +// | |
| 8 | + | |
| 9 | +#include "HandControl.h" | |
| 10 | + | |
| 11 | +// this class takes mouse movements normalized within the screen | |
| 12 | +// dimensions and uses those to determine avatar hand movements, as well | |
| 13 | +// as states for ramping up and ramping down the amplitude of such movements. | |
| 14 | +// | |
| 15 | +// This class might expand to accommodate 3D input devices | |
| 16 | +// | |
| 17 | + | |
| 18 | +HandControl::HandControl() { | |
| 19 | + | |
| 20 | + _enabled = false; | |
| 21 | + _width = 0; | |
| 22 | + _height = 0; | |
| 23 | + _startX = 0; | |
| 24 | + _startY = 0; | |
| 25 | + _x = 0; | |
| 26 | + _y = 0; | |
| 27 | + _lastX = 0; | |
| 28 | + _lastY = 0; | |
| 29 | + _velocityX = 0; | |
| 30 | + _velocityY = 0; | |
| 31 | + _rampUpRate = 0.05; | |
| 32 | + _rampDownRate = 0.02; | |
| 33 | + _envelope = 0.0f; | |
| 34 | +} | |
| 35 | + | |
| 36 | +void HandControl::setScreenDimensions( int width, int height ) { | |
| 37 | + _width = width; | |
| 38 | + _height = height; | |
| 39 | + _startX = _width / 2; | |
| 40 | + _startY = _height / 2; | |
| 41 | +} | |
| 42 | + | |
| 43 | +void HandControl::update( int x, int y ) { | |
| 44 | + _lastX = _x; | |
| 45 | + _lastY = _y; | |
| 46 | + _x = x; | |
| 47 | + _y = y; | |
| 48 | + _velocityX = _x - _lastX; | |
| 49 | + _velocityY = _y - _lastY; | |
| 50 | + | |
| 51 | + // if the mouse is moving, ramp up the envelope to increase amplitude of hand movement... | |
| 52 | + if (( _velocityX != 0 ) | |
| 53 | + || ( _velocityY != 0 )) { | |
| 54 | + _enabled = true; | |
| 55 | + if ( _envelope < 1.0 ) { | |
| 56 | + _envelope += _rampUpRate; | |
| 57 | + if ( _envelope >= 1.0 ) { | |
| 58 | + _envelope = 1.0; | |
| 59 | + } | |
| 60 | + } | |
| 61 | + } | |
| 62 | + | |
| 63 | + // if not enabled ramp down the envelope to decrease amplitude of hand movement... | |
| 64 | + if ( ! _enabled ) { | |
| 65 | + if ( _envelope > 0.0 ) { | |
| 66 | + _envelope -= _rampDownRate; | |
| 67 | + if ( _envelope <= 0.0 ) { | |
| 68 | + _startX = _width / 2; | |
| 69 | + _startY = _height / 2; | |
| 70 | + _envelope = 0.0; | |
| 71 | + } | |
| 72 | + } | |
| 73 | + } | |
| 74 | + | |
| 75 | + _leftRight = 0.0; | |
| 76 | + _downUp = 0.0; | |
| 77 | + _backFront = 0.0; | |
| 78 | + | |
| 79 | + // if envelope is greater than zero, apply mouse movement to values to be output | |
| 80 | + if ( _envelope > 0.0 ) { | |
| 81 | + _leftRight += ( ( _x - _startX ) / (float)_width ) * _envelope; | |
| 82 | + _downUp += ( ( _y - _startY ) / (float)_height ) * _envelope; | |
| 83 | + } | |
| 84 | +} | |
| 85 | + | |
| 86 | +glm::vec3 HandControl::getValues() { | |
| 87 | + return glm::vec3( _leftRight, _downUp, _backFront ); | |
| 88 | +} | |
| 89 | + | |
| 90 | +void HandControl::stop() { | |
| 91 | + _enabled = false; | |
| 92 | +} | |
| 93 | + | |