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Inaccurate Gravity Vector

Discussion in 'Programming Questions and Suggestions' started by Flaschenhaxel, Mar 19, 2019.

Thread Status:
This last post in this thread was made more than 31 days old.
  1. Flaschenhaxel Trainee Engineer

    Messages:
    2
    I am currently working on a script that searches for the nearest point directly over a given point(T) over the surface of the Planet, so I can drop a Crate with parachutes on that given point.
    The Problem is that i do not understand the new IntergridCommunicationSystem and I need T on the Surface as well as the Gravity Vector at T on a ship not connected to the grid at T. I tried to get both via .GetPosition() and .GetNaturalGravity from a RemoteControl and display the X,Y,Z Components on a LCD screen, Copy them and paste Them in the Programming Block on the ship. After tests it shows that on short ranges it is accurate, the higher up i go the further i move from the base, seen on the X,Y plane. thats a problem as i plan to position a ship on the ege of the planets gravitywell.
    I think the reason why is that the LCD display just shows whole Numbers no decimal places and so the Gravity Vector i get might be inaccurate.
    Is there a way to show a more accurate representation of the Gravity Vector on the LCD panel, or does someone know a better way to transmit the Informations needed?

    Code:
    public void Main()
    
    {
    
    //Setting up Variables
    IMyRemoteControl RC = GridTerminalSystem.GetBlockWithName("Remote Control") as IMyRemoteControl;
    var lcd = GridTerminalSystem.GetBlockWithName("LCD Panel") as IMyTextPanel;
    var lcd2 = GridTerminalSystem.GetBlockWithName("LCD Panel 2") as IMyTextPanel;
    //Getting Target Coordiantes and putting them on the LCD
    double x = Math.Floor(RC.GetPosition().GetDim(0));		 
    double y = Math.Floor(RC.GetPosition().GetDim(1));		 
    double z = Math.Floor(RC.GetPosition().GetDim(2));
    string str = x.ToString() + ", " + y.ToString() + ", " + z.ToString();	
    lcd.WritePublicText(str);
    lcd.ShowTextureOnScreen();
    lcd.ShowPublicTextOnScreen();
    // and the same with the Gravity Vector
    double a = Math.Floor(RC.GetNaturalGravity().GetDim(0));		 
    double b = Math.Floor(RC.GetNaturalGravity().GetDim(1));		 
    double c = Math.Floor(RC.GetNaturalGravity().GetDim(2));
    string Grav = a.ToString() + ", " + b.ToString() + ", " + c.ToString();	
    lcd2.WritePublicText(Grav);
    lcd2.ShowTextureOnScreen();
    lcd2.ShowPublicTextOnScreen();
    }
    The code for T and the Gravity Vector
    Code:
    Vector3D BaseGPS = new Vector3D(-51326, -28395, 16533); // Coordiantes of T
    IMyRemoteControl RemoteControl = GridTerminalSystem.GetBlockWithName("Remote Control") as IMyRemoteControl;
    IMyTextPanel LCD = GridTerminalSystem.GetBlockWithName("Text panel") as IMyTextPanel;
    Vector3D GV = new Vector3D(8,4,-3); // Gravity Vector
    
    Vector3D CurrentPos = RemoteControl.GetPosition();
    Vector3D q = CurrentPos-BaseGPS;
    double p = q.X * GV.X + q.Y * GV.Y + q.Z * GV.Z; //finding out Space engineers doesnt understand a normal scalar
    double v = GV.Length();										 //Calculation of the nearest point above T step by step to minimize errors
    double a = p/(v*v);
    Vector3D M;
    M.X = a * GV.X;
    M.Y = a * GV.Y;
    M.Z = a * GV.Z;
    Vector3D Destination = BaseGPS + M;
    
    //Displaying Coordinates of the nearest point above T on the LCD to add them manualy to my GPS
    double x = Math.Floor(Destination.GetDim(0));		 
    double y = Math.Floor(Destination.GetDim(1));		 
    double z = Math.Floor(Destination.GetDim(2));
    string Dest = x.ToString() + ", " + y.ToString() + ", " + z.ToString();	
    
    LCD.WritePublicText(Dest);
    LCD.ShowTextureOnScreen();
    LCD.ShowPublicTextOnScreen();
    
    
    and the code to find the nearest point above T

    I know the math i am doing but I don't know how to code exept what i learned in a beginners course and what i thought my self yesterday.
     
  2. Malware Master Engineer

    Messages:
    9,428
    You say the LCD just shows whole numbers, but you are doing that yourself by flooring the destination.X, Y and Z. By doing that you're just getting the whole numbers.
     
  3. Flaschenhaxel Trainee Engineer

    Messages:
    2
    Thank you very much. This fixed it for me.
     
Thread Status:
This last post in this thread was made more than 31 days old.