gfx_ball.h

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#ifndef __GFX_BALL_H__
#define __GFX_BALL_H__
 
#include "gfx_draw.h"
 
typedef void (*callback_t)(void *args);
 
typedef struct ball {
    gfx_image_handle_t sprite;
 
    signed short x; 
    signed short y; 
    float f_x; 
    float f_y; 
    float dx; 
    float dy; 
    float max_speed; 
    unsigned int colour; 
    signed short radius; 
    callback_t callback; 
    void *args; 
} ball_t;
 
typedef struct wall {
    signed short x1; 
    signed short y1; 
    signed short w; 
    signed short h; 
    signed short x2; 
    signed short y2; 
    float dampening; 
    unsigned int colour; 
    callback_t callback; 
    void *args; 
} wall_t;
 
ball_t *gfxCreateBall(signed short initial_x, signed short initial_y,
                      unsigned int colour, signed short radius, float max_speed,
                      callback_t callback, void *args, gfx_image_handle_t sprite);
 
wall_t *gfxCreateWall(signed short x1, signed short y1, signed short w,
                      signed short h, float dampening, unsigned int colour,
                      callback_t callback, void *args);
 
#define SET_WALL_X 0b1
 
#define SET_WALL_Y 0b10
 
#define SET_WALL_WIDTH 0b100
 
#define SET_WALL_HEIGHT 0b1000
 
#define SET_WALL_AXES SET_WALL_X | SET_WALL_Y
 
#define SET_WALL_SIZE SET_WALL_WIDTH | SET_WALL_HEIGHT
 
#define SET_WALL_ALL SET_WALL_AXES | SET_WALL_SIZE
 
void gfxSetWallProperty(wall_t *wall, signed short x, signed short y,
                        signed short width, signed short height,
                        unsigned char flags);
 
#define SET_BALL_SPEED_X 0b1
 
#define SET_BALL_SPEED_Y 0b10
 
#define SET_BALL_SPEED_MAX 0b100
 
#define SET_BALL_SPEED_AXES SET_BALL_SPEED_X | SET_BALL_SPEED_Y
 
#define SET_BALL_SPEED_ALL SET_BALL_SPEED_AXES | SET_BALL_SPEED_MAX
void gfxSetBallSpeed(ball_t *ball, float dx, float dy, float max_speed,
                     unsigned char flags);
 
void gfxSetBallLocation(ball_t *ball, signed short x, signed short y);
 
signed char gfxCheckBallCollisions(ball_t *ball, callback_t callback, void *args);
 
void gfxUpdateBallPosition(ball_t *ball, unsigned int milli_seconds);
 
#endif