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/**********************************************************************************************
*
* raylib Gestures System - Gestures Detection and Usage Functions (Android and HTML5)
*
* Copyright (c) 2015 Marc Palau and Ramon Santamaria
*
* This software is provided "as-is", without any express or implied warranty. In no event
* will the authors be held liable for any damages arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose, including commercial
* applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not claim that you
* wrote the original software. If you use this software in a product, an acknowledgment
* in the product documentation would be appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
* as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/
#ifndef GESTURES_H
#define GESTURES_H
#ifndef PI
#define PI 3.14159265358979323846
#endif
#define DEG2RAD (PI / 180.0f)
#define RAD2DEG (180.0f / PI)
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Types and Structures Definition
// NOTE: Below types are required for GESTURES_STANDALONE usage
//----------------------------------------------------------------------------------
#ifndef __cplusplus
// Boolean type
typedef enum { false, true } bool;
#endif
// Vector2 type
typedef struct Vector2 {
float x;
float y;
} Vector2;
// Gestures type
// NOTE: It could be used as flags to enable only some gestures
typedef enum {
GESTURE_NONE = 1,
GESTURE_TAP = 2,
GESTURE_DOUBLETAP = 4,
GESTURE_HOLD = 8,
GESTURE_DRAG = 16,
GESTURE_SWIPE_RIGHT = 32,
GESTURE_SWIPE_LEFT = 64,
GESTURE_SWIPE_UP = 128,
GESTURE_SWIPE_DOWN = 256,
GESTURE_PINCH_IN = 512,
GESTURE_PINCH_OUT = 1024
} Gestures;
typedef enum { TOUCH_UP, TOUCH_DOWN, TOUCH_MOVE } TouchAction;
// Gesture events
// NOTE: MAX_TOUCH_POINTS fixed to 4
typedef struct {
int touchAction;
int pointCount;
int pointerId[4];
Vector2 position[4];
} GestureEvent;
#ifdef __cplusplus
extern "C" { // Prevents name mangling of functions
#endif
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void SetGesturesEnabled(unsigned int gestureFlags); // Enable a set of gestures using flags
bool IsGestureDetected(int gesture); // Check if a gesture have been detected
void ProcessGestureEvent(GestureEvent event); // Process gesture event and translate it into gestures
void UpdateGestures(void); // Update gestures detected (must be called every frame)
int GetTouchPointsCount(void); // Get touch points count
int GetGestureDetected(void); // Get latest detected gesture
float GetGestureHoldDuration(void); // Get gesture hold time in milliseconds
Vector2 GetGestureDragVector(void); // Get gesture drag vector
float GetGestureDragAngle(void); // Get gesture drag angle
Vector2 GetGesturePinchVector(void); // Get gesture pinch delta
float GetGesturePinchAngle(void); // Get gesture pinch angle
#ifdef __cplusplus
}
#endif
#endif // GESTURES_H
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