Function AimAtTarget

code/game/g_trigger.cpp:751–824

================= AimAtTarget Calculate origin2 so the target apogee will be hit ================= */

=================
*/
void AimAtTarget( gentity_t *self )
{
	gentity_t	*ent;
	vec3_t		origin;
	float		height, gravity, time, forward;
	float		dist;

	VectorAdd( self->absmin, self->absmax, origin );
	VectorScale ( origin, 0.5, origin );

	ent = G_PickTarget( self->target );
	if ( !ent )
	{
		G_FreeEntity( self );
		return;
	}

	if ( self->classname && !Q_stricmp( "trigger_push", self->classname ) )
	{
		if ( (self->spawnflags&2) )
		{//check once a second to see if we should activate or deactivate ourselves
			self->e_ThinkFunc = thinkF_trigger_push_checkclear;
			self->nextthink = level.time + FRAMETIME;
		}

		if ( (self->spawnflags&16) )
		{//relative, not an arc or linear
			VectorCopy( ent->currentOrigin, self->s.origin2 );
			return;
		}
		else if ( (self->spawnflags&4) )
		{//linear, not an arc
			VectorSubtract( ent->currentOrigin, origin, self->s.origin2 );
			VectorNormalize( self->s.origin2 );
			return;
		}
	}

	if ( self->classname && !Q_stricmp( "target_push", self->classname ) )
	{
		if( self->spawnflags & PUSH_CONSTANT )
		{
			VectorSubtract ( ent->s.origin, self->s.origin, self->s.origin2 );
			VectorNormalize( self->s.origin2);
			VectorScale (self->s.origin2, self->speed, self->s.origin2);
			return;
		}
	}
	height = ent->s.origin[2] - origin[2];
	if ( height < 0 )
	{//sqrt of negative is bad!
		height = 0;
	}
	gravity = g_gravity->value;
	if ( gravity < 0 )
	{
		gravity = 0;
	}