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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 | |||