Subversion Repositories openmsp430

#include "spacewar.h"

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

// externals

//

extern volatile int xinit, yinit;

extern void cline(int, int);

extern void point(rkt_data *);

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

//

// rkt1

//

//    draws rocket # 1

//

/* Description:

Draws rocket 1 made of five lines.  This rocket looks like the starship

enterprise.  Also draws rocket 1 torpedos as points.

*/

void rocket1(rkt_data *rkt1)

{

int dif_yx, sum_yx;

int xfin, yfin;

  dif_yx = (rkt1->ysize >> 1) - (rkt1->xsize >> 1);

  sum_yx = (rkt1->ysize >> 1) + (rkt1->xsize >> 1);

  xinit = rkt1->xdisp + rkt1->xsize;

  yinit = rkt1->ydisp + rkt1->ysize;

  xfin = rkt1->xdisp - (rkt1->xsize >> 1);

  yfin = rkt1->ydisp - (rkt1->ysize >> 1);

  cline(xfin, yfin);                      // draw line #1

  xfin = xinit - dif_yx;

  yfin = yinit + sum_yx;

  xinit -= sum_yx;

  yinit -= dif_yx;

  cline(xfin, yfin);                      // draw line #2

  xfin = xinit + sum_yx;

  yfin = yinit + dif_yx;

  cline(xfin, yfin);                      // draw line #3

  xfin = xinit + dif_yx;

  yfin = yinit - sum_yx;

  cline(xfin, yfin);                      // draw line #4

  xfin = xinit - sum_yx + dif_yx;

  yfin = yinit - sum_yx - dif_yx;

  cline(xfin, yfin);                      // draw line #5

  point(rkt1);                            // update and draw rkt1's torpedoes

}