TempleOS-Rijn/SparrowOS/Demo/Graphics/RotateTank.CPP

		$SP,"<1>",1$

















U0 RotateTank()
{
  F64 é,è,ê;
  CDC *dc=DCAlias;
  DocClear;
  DCAllocDepthBuf(dc);
  dc->flags|=DCF_TRANSFORMATION;
  Fs->win_left=TEXT_COLS/2-12;
  Fs->win_right=TEXT_COLS/2+12;
  Fs->win_top=TEXT_ROWS/2-12;
  Fs->win_bottom=TEXT_ROWS/2+12;
  TaskDerivedValsUpdate;

  try {
    while (!ScanChar) {
      DCDepthBufRst(dc);

      é=0.25*Sin(tP/10*2*ã)-ã/2;
      è=0.4*Sin(tP/5*2*ã);
      ê=0.25*Sin(tP/10*2*ã)+ã/2;

      GrIdentEqu(dc->r);
      GrRotYEqu(dc->r,ê);
      GrRotXEqu(dc->r,è);
      GrRotZEqu(dc->r,é);
      GrSetRotMat(dc,dc->r);

      dc->x=Fs->win_pixel_width/2;
      dc->y=Fs->win_pixel_height/2;
//This offsets the image Z so that no parts are
//not drawn because they are in front of the screen.
      dc->z=GR_Z_ALL;
 
      CSpritePlot3(dc,0,0,0,$IB,"<1>",1$);
      WinMgrSync;
      DCFill;
    }
  } catch
    CatchAll;

  DCFill;
  DCDel(dc);
}

RotateTank;

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