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Diffstat (limited to 'uiInteract.h')
| -rw-r--r-- | uiInteract.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/uiInteract.h b/uiInteract.h new file mode 100644 index 0000000..d7bfe6b --- /dev/null +++ b/uiInteract.h @@ -0,0 +1,131 @@ +/********************************************* + * Header file: + * UI INTERFACE + * Author: + * Br. Helfrich + * Summary: + * This module will create an OpenGL window, + * enter the OpenGL main loop, and accept events. + * The main methods are: + * 1. Constructors - Create the window + * 2. run() - Run the main loop + * 3. callback - Specified in Run, this user-provided + * function will get called with every frame + * 4. isDown() - Is a given key pressed on this loop? + **********************************************/ + +#ifndef UI_INTERFACE_H +#define UI_INTERFACE_H + + #include "point.h" + +/******************************************** + * INTERFACE + * All the data necessary to keep our graphics + * state in memory + ********************************************/ +class Interface +{ +public: + // Default constructor useful for setting up the random variables + // or for opening the file for output + Interface() { initialize(0, 0x0000, "Window", Point(-50, 50), Point(50, -50)); }; + + // Constructor if you want to set up the window with anything but + // the default parameters + Interface(int argc, char ** argv, const char * title, Point topLeft, Point bottomRight) + { + initialize(argc, argv, title, topLeft, bottomRight); + } + + // Destructor, incase any housecleaning needs to occr + ~Interface(); + + // This will set the game in motion + void run(void (*callBack)(const Interface *, void *), void *p); + + // Is it time to redraw the screen + bool isTimeToDraw(); + + // Set the next draw time based on current time and time period + void setNextDrawTime(); + + // Retrieve the next tick time... the time of the next draw. + unsigned int getNextTick() { return nextTick; }; + + // How many frames per second are we configured for? + void setFramesPerSecond(double value); + + // Key event indicating a key has been pressed or not. The callbacks + // should be the only onces to call this + void keyEvent(int key, bool fDown); + void keyEvent(); + + // Current frame rate + double frameRate() const { return timePeriod; }; + + // Get various key events + int isDown() const { return isDownPress; }; + int isUp() const { return isUpPress; }; + int isLeft() const { return isLeftPress; }; + int isRight() const { return isRightPress; }; + bool isSpace() const { return isSpacePress; }; + + static void *p; // for client + static void (*callBack)(const Interface *, void *); + +private: + void initialize(int argc, char ** argv, const char * title, Point topLeft, Point bottomRight); + + static bool initialized; // only run the constructor once! + static double timePeriod; // interval between frame draws + static unsigned int nextTick; // time (from clock()) of our next draw + + static int isDownPress; // is the down arrow currently pressed? + static int isUpPress; // " up " + static int isLeftPress; // " left " + static int isRightPress; // " right " + static bool isSpacePress; // " space " +}; + + + +/************************************************************************ + * DRAW CALLBACK + * This is the main callback from OpenGL. It gets called constantly by + * the graphics engine to refresh and draw the window. Here we will + * clear the background buffer, draw on it, and send it to the forefront + * when the appropriate time period has passsed. + * + * Note: This and all other callbacks can't be member functions, they must + * have global scope for OpenGL to see them. + *************************************************************************/ +void drawCallback(); + +/************************************************************************ + * KEY DOWN CALLBACK + * When a key on the keyboard has been pressed, we need to pass that + * on to the client. Currnetly, we are only registering the arrow keys + *************************************************************************/ +void keyDownCallback(int key, int x, int y); + +/************************************************************************ + * KEY UP CALLBACK + * When the user has released the key, we need to reset the pressed flag + *************************************************************************/ +void keyUpCallback(int key, int x, int y); + +/*************************************************************** + * KEYBOARD CALLBACK + * Generic callback to a regular ascii keyboard event, such as + * the space bar or the letter 'q' + ***************************************************************/ +void keyboardCallback(unsigned char key, int x, int y); + +/************************************************************************ + * RUN + * Set the game in action. We will get control back in our drawCallback + *************************************************************************/ +void run(); + +#endif // UI_INTERFACE_H |