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#ifndef __BANGDOTS_H__2010
#define __BANGDOTS_H__2010
#include "config.h"
#include "u-iff.h"
/*! \brief A list of colours
*
* Remember that the colour-list length is one less than the actual
* number of elements. See the get_life_colour() function for further
* information.
*/
typedef struct Sparkle_life_colours {
SDL_Color *clist; //!< colour list if multiple colours
unsigned cl_len; //!< length of colour list excluding the last duplicated element
} sparkle_life_colours_t;
/*! \brief sparkles for the "particle engine"
*
* Sparkles can have a single colour or may change colour. The colour
* is chosen from a list.
*/
typedef struct Sparkle {
float x; //!< X-position
float y; //!< Y-position
float dx; //!< delta X
float dy; //!< delta Y
float life; //!< When reduced to 0, kill
float decay; //!< Amount by which to reduce life each time dot is drawn
union {
RD_VIDEO_TYPE col; //!< colour if a single colour is used
struct {
sparkle_life_colours_t *fading; //!< fading colours
Uint32 oldfadecol; //!< we save the last generated colour here for testing if pixel was overwritten
};
};
unsigned short spty; //!< sparcle type
} sparkle_t;
extern sparkle_life_colours_t hot_colours;
extern sparkle_life_colours_t cool_colours;
Uint32 get_life_colour(float life, sparkle_life_colours_t *fcols, SDL_Surface *surf);
/*! \brief initialise sparkles engine
*
* Initialises the engine, the information about parameters and colours
* is read from the file with filename datafn.
*
* \param iff iff context (call by value!)
* \return NULL on error
*/
sparkle_t *init_sparkles(uiff_ctx_t iff);
/*! \brief Create bangdots
*
* Bangdots are used for explosions etc.
*/
void makebangdots(int xbang, int ybang, int xvel, int yvel, SDL_Surface * s,
int power, int amtdots);
/*! \brief Draw the sparkles (bangdots (explosion), plume dots, etc.)
*
* \param surf Surface to draw on.
*/
void draw_sparkles(SDL_Surface *surf);
/*! \brief Move and age bangdots.
*
* This function moves all sparkles and cools them. If they are too
* cool or have moved out of the screen they are set to inactive
* status. Also all sparkles are inactivated which collide with
* something or leave the screen.
*/
void update_sparkles(SDL_Surface *surf);
/*! \brief Reset all sparkles/dots.
*
* The sparkles/dots are reset so that no more dots are active.
*/
void reset_sparkles(void);
void create_plumedots(int num, short x, short y, short heading, short angle, float speed);
#endif
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