AlliedModders - Moving the endpoint of a traceray back along it slightly?

Alright so this is for my teleport command, which a few people are running.

I am trying to implement the ability to not get stuck in walls when you are aiming at one, but I'm not sure how to go about it.

This is what I have at the moment:

PHP Code:


		
			
    decl Float:vAngles[3];
    decl Float:vOrigin[3];    
    
    GetClientEyePosition(client,vOrigin);
    GetClientEyeAngles(client, vAngles);
    
    //get endpoint for teleport
    new Handle:trace = TR_TraceRayFilterEx(vOrigin, vAngles, MASK_SHOT, RayType_Infinite, TraceEntityFilterPlayer);
        
    if(TR_DidHit(trace))
    {        
            TR_GetEndPosition(g_pos, trace);
            
            g_pos[2] += 10.0;    
    }
    else
    {
        PrintToChat(client, "[SM] %s", "Could not teleport player");
        CloseHandle(trace);
        return false;
    }
    
    CloseHandle(trace);
    return true;

I am assuming I will have to use GetVectorDistance(vOrigin,g_pos), subtract a bit off it, and then combine that with the view angles to somehow get the end point.

Any help would be muchly appreciated.