I started to have fun with mechanics of Counter Strike Global Offensive, especially physics of grenades. Here I point out specific functions, lines, and comments from CSGO source code leaks.
Defined in /game/shared/physics_main_shared.cpp, function void CBaseEntity::PhysicsToss( void ). Also this whole function is great point of interest.
/game/shared/physics_main_shared.cpp#L1686
if ( debugoverlay && sv_grenade_trajectory.GetInt() && (GetFlags() & FL_GRENADE) )
{
QAngle angGrTrajAngles;
Vector vec3tempOrientation = (trace.endpos - trace.startpos);
VectorAngles( vec3tempOrientation, angGrTrajAngles );
float flGrTraThickness = sv_grenade_trajectory_thickness.GetFloat();
Vector vec3_GrTrajMin = Vector( 0, -flGrTraThickness, -flGrTraThickness );
Vector vec3_GrTrajMax = Vector( vec3tempOrientation.Length(), flGrTraThickness, flGrTraThickness );
bool bDotted = ( sv_grenade_trajectory_dash.GetInt() && (fmod( gpGlobals->curtime, 0.1f ) < 0.05f) );
//extruded "line" is really a box for more visible thickness
debugoverlay->AddBoxOverlay( trace.startpos, vec3_GrTrajMin, vec3_GrTrajMax, angGrTrajAngles, 0, (bDotted ? 20 : 200), 0, 255, sv_grenade_trajectory_time.GetFloat() );
//per-bounce box
if (trace.fraction != 1.0f)
debugoverlay->AddBoxOverlay( trace.endpos, Vector( -GRENADE_DEFAULT_SIZE, -GRENADE_DEFAULT_SIZE, -GRENADE_DEFAULT_SIZE ), Vector( GRENADE_DEFAULT_SIZE, GRENADE_DEFAULT_SIZE, GRENADE_DEFAULT_SIZE ), QAngle( 0, 0, 0 ), 220, 0, 0, 190, sv_grenade_trajectory_time.GetFloat( ) );
}
Here are screenshots showing boxes, with sv_grenade_trajectory_thickness set to 1
Drawing function reference AddBoxOverlay function, but include "/engine/ivdebugoverlay.h" which is not present. Other function that is defined however is in "/engine/debugoverlay.h". Maybe some engine changes were made while leak happened?