Subversion Repositories openmsp430

//************************************************************

// externals

//

extern volatile int xdisp1, ydisp1;

extern void set_xy(int, int);

//************************************************************

//

// explode

//

//    make explosion at exp_x, exp_y

//

/* Description:

Generate a visible explosion at position exp_x, exp_y.  This function reads

ints from code space as random numbers to draw points around the exp_x, exp_y

position.  The ints are scaled to 8 bits and added to exp_x, and exp_y to

generate a random position centered on exp_x, exp_y.  A point is displayed at

each position.

*/

void explode(int exp_x, int exp_y)

{

  int i, j, xfin, yfin;

  int *rp;

  rp = (int *)0xF880;             // use code space as randon number

  for(i = 0; i < 32; i++) {

    xfin = exp_x + (*rp++ >> 8);

    yfin = exp_y + (*rp++ >> 8);

    set_xy(xfin, yfin);

    for(j = 0; j < 16384; j++) {

    }

  }

}