Last change
on this file was
80,
checked in by Sam Hocevar, 12 years ago

 Adding the Golgotha source code. Not sure what's going to be interesting
in there, but since it's all public domain, there's certainly stuff to
pick up.

File size:
1.4 KB

Line  

1  /********************************************************************** <BR>


2  This file is part of Crack dot Com's free source code release of


3  Golgotha. <a href="http://www.crack.com/golgotha_release"> <BR> for


4  information about compiling & licensing issues visit this URL</a>


5  <PRE> If that doesn't help, contact Jonathan Clark at


6  golgotha_source@usa.net (Subject should have "GOLG" in it)


7  ***********************************************************************/


8 


9  #include "objs/fire_angle.hh"


10  #include "math/pi.hh"


11  #include <math.h>


12 


13  i4_bool g1_calc_fire_angle(i4_float x_y_dist,


14  i4_float z1,


15  i4_float z2,


16  i4_float g,


17  i4_float vo,


18  i4_float &theta)


19  {


20  if (z1!=z2)


21  {


22  i4_float z_dist=z2z1;


23  i4_float b=x_y_dist * sqrt(1  (4 * z_dist * g)/(2 * vo*vo));


24  i4_float c=(2 * z_dist);


25 


26  // ignore the +b solution because it occurs in negative time


27 


28  i4_float cos_theta2=(x_y_dist  b)/c;


29  if (cos_theta2>=1 && cos_theta2<=1)


30  {


31  theta=acos(cos_theta2);


32  return i4_T;


33  }


34  return i4_F;


35  }


36  else


37  {


38  i4_float cos_theta=g * x_y_dist / (2 * vo*vo);


39 


40  if (cos_theta>=1 && cos_theta<=1)


41  {


42  theta=acos(cos_theta);


43  if (theta>=i4_pi()/4)


44  theta=i4_pi()/2theta;


45 


46 


47  return i4_T;


48  }


49  return i4_F;


50  }


51  }


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