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