Controlable Water Waves

Copyright info

All code in this tutorial is protected by the [GPL License].
All text in this tutorial is protected by the [FDL License].

Tutorial by: GGodis

Mailto: ggodis@yahoo.com

This tut is about how to make controlable water waves For this tut we have to modify three files, that would be : "gl_warp.c, gl_local.h and gl_main.c"

First open up "gl_local.h", go to the line that says :

 
 
 extern cvar_t *r_lightlevel;
 
 

And paste this below:

 
 
extern cvar_t *r_wave; // Water waves
 
 

Ok, in this file we are done. Now open "gl_main.c" Go to the line that looks like this :

 
 
 cvar_t *r_lightlevel;
 
 

Paste this below it :

 
 
 cvar_t *r_wave; // Water waves
 
 

And now go to the function caled : void R_Register( void ) Find this line :

 
 
 r_lightlevel = ri.Cvar_Get ("r_lightlevel", "0", 0);
 
 

And paste this below it :

 
 
 r_wave = ri.Cvar_Get ("r_wave", "2", 0); // Water waves
 
 

Ok, this file is done !
Now open the last file caled "gl_warp.c". Go to the function caled "EmitWaterPolys" And paste this at the begining

 
 
 vec3_t nv; // Water waves
 
 

Now in the same function go to line : "qglTexCoord2f (s, t);" And at the botom of this line paste the water wave code :

 
 
//=============== Water waves ============
 if (!(fa->texinfo->flags & SURF_FLOWING))
 {
 nv[0] =v[0];
 nv[1] =v[1];
 #if !id386
 nv[2] =v[2] + r_wave->value *sin(v[0]*0.025+r_newrefdef.time)*sin(v[2]*0.05+r_newrefdef.time)
 + r_wave->value *sin(v[1]*0.025+r_newrefdef.time*2)*sin(v[2]*0.05+r_newrefdef.time);
 #else
 nv[2] =v[2] + r_wave->value *sin(v[0]*0.025+rdt)*sin(v[2]*0.05+r_newrefdef.time)
 + r_wave->value *sin(v[1]*0.025+rdt*2)*sin(v[2]*0.05+rdt);
 #endif
 
 qglVertex3fv (nv);
 }
 else
//============= Water waves end. ==============
 
 qglVertex3fv (v);
 }
 qglEnd ();
 }
}
 
 

Thats all ! Enjoy the water waves.

Tutorial Originally found at: