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Adding the mouse cursor to HUD?

Raptor-chan
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Raptor-chan
Hello,

I'm new to UScript and a friend of mine pointed me to a tutorial on the UDN that shows how to get the mouse cursor to show up and interact with a level in UDK. I'm slowly going through this tutorial, but I seem to be having a couple of issues. I'm getting 3 errors that I'm not sure how to fix. I don't want to open UDK until these can be fixed. I don't want to mess up my project or UDK in general. I've already had to reinstall UDK multiple times due to various issues.

Any help would be greatly appreciated. Thank you!!

Errors:
th_Mouse_interaction_UDK_errors.png

MouseInterfaceInteractionInterface.uc 
class MouseInterfaceInteractionInterface extends Object;

interface MouseInterfaceInteractionInterface

// Called when the left mouse button is pressed
function MouseLeftPressed(Vector MouseWorldOrigin, Vector MouseWorldDirection, Vector HitLocation, Vector HitNormal);

// Called when the left mouse button is released
function MouseLeftReleased(Vector MouseWorldOrigin, Vector MouseWorldDirection);

// Called when the right mouse button is pressed
function MouseRightPressed(Vector MouseWorldOrigin, Vector MouseWorldDirection, Vector HitLocation, Vector HitNormal);

// Called when the right mouse button is released
function MouseRightReleased(Vector MouseWorldOrigin, Vector MouseWorldDirection);

// Called when the middle mouse button is pressed
function MouseMiddlePressed(Vector MouseWorldOrigin, Vector MouseWorldDirection, Vector HitLocation, Vector HitNormal);

// Called when the middle mouse button is released
function MouseMiddleReleased(Vector MouseWorldOrigin, Vector MouseWorldDirection);

// Called when the middle mouse button is scrolled up
function MouseScrollUp(Vector MouseWorldOrigin, Vector MouseWorldDirection);

// Called when the middle mouse button is scrolled down
function MouseScrollDown(Vector MouseWorldOrigin, Vector MouseWorldDirection);

// Called when the mouse is moved over the actor
function MouseOver(Vector MouseWorldOrigin, Vector MouseWorldDirection);

// Called when the mouse is moved out from the actor (when it was previously over it)
function MouseOut(Vector MouseWorldOrigin, Vector MouseWorldDirection);

// Returns the hit location of the mouse trace
function Vector GetHitLocation();

// Returns the hit normal of the mouse trace
function Vector GetHitNormal();

// Returns the mouse world origin calculated by the deprojection within the canvas
function Vector GetMouseWorldOrigin();

// Returns the mouse world direction calculated by the deprojection within the canvas
function Vector GetMouseWorldDirection();

DefaultProperties
{
}

MouseInterfaceKActor.uc 
class MouseInterfaceKActor extends KActor
Implements(MouseInterfaceInteractionInterface);

var Vector CachedMouseHitLocation;
var Vector CachedMouseHitNormal;
var Vector CachedMouseWorldOrigin;
var Vector CachedMouseWorldDirection;

// ===
// MouseInterfaceInteractionInterface implementation
// ===
function MouseLeftPressed(Vector MouseWorldOrigin, Vector MouseWorldDirection, Vector HitLocation, Vector HitNormal)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = HitLocation;
  CachedMouseHitNormal = HitNormal;
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 0);
}

function MouseLeftReleased(Vector MouseWorldOrigin, Vector MouseWorldDirection)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = Vect(0.f, 0.f, 0.f);
  CachedMouseHitNormal = Vect(0.f, 0.f, 0.f);
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 1);
}

function MouseRightPressed(Vector MouseWorldOrigin, Vector MouseWorldDirection, Vector HitLocation, Vector HitNormal)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = HitLocation;
  CachedMouseHitNormal = HitNormal;
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 2);
}

function MouseRightReleased(Vector MouseWorldOrigin, Vector MouseWorldDirection)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = Vect(0.f, 0.f, 0.f);
  CachedMouseHitNormal = Vect(0.f, 0.f, 0.f);
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 3);
}

function MouseMiddlePressed(Vector MouseWorldOrigin, Vector MouseWorldDirection, Vector HitLocation, Vector HitNormal)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = HitLocation;
  CachedMouseHitNormal = HitNormal;
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 4);
}

function MouseMiddleReleased(Vector MouseWorldOrigin, Vector MouseWorldDirection)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = Vect(0.f, 0.f, 0.f);
  CachedMouseHitNormal = Vect(0.f, 0.f, 0.f);
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 5);
}

function MouseScrollUp(Vector MouseWorldOrigin, Vector MouseWorldDirection)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = Vect(0.f, 0.f, 0.f);
  CachedMouseHitNormal = Vect(0.f, 0.f, 0.f);
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 6);
}

function MouseScrollDown(Vector MouseWorldOrigin, Vector MouseWorldDirection)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = Vect(0.f, 0.f, 0.f);
  CachedMouseHitNormal = Vect(0.f, 0.f, 0.f);
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 7);
}

function MouseOver(Vector MouseWorldOrigin, Vector MouseWorldDirection)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = Vect(0.f, 0.f, 0.f);
  CachedMouseHitNormal = Vect(0.f, 0.f, 0.f);
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 8);
}

function MouseOut(Vector MouseWorldOrigin, Vector MouseWorldDirection)
{
  CachedMouseWorldOrigin = MouseWorldOrigin;
  CachedMouseWorldDirection = MouseWorldDirection;
  CachedMouseHitLocation = Vect(0.f, 0.f, 0.f);
  CachedMouseHitNormal = Vect(0.f, 0.f, 0.f);
  TriggerEventClass(class'SeqEvent_MouseInput', Self, 9);
}

function Vector GetHitLocation()
{
  return CachedMouseHitLocation;
}

function Vector GetHitNormal()
{
  return CachedMouseHitNormal;
}

function Vector GetMouseWorldOrigin()
{
  return CachedMouseWorldOrigin;
}

function Vector GetMouseWorldDirection()
{
  return CachedMouseWorldDirection;
}

defaultproperties
{
  SupportedEvents(4)=class'SeqEvent_MouseInput'
}

MouseInterfacePlayerInput.uc 
class MouseInterfacePlayerInput extends PlayerInput;

// Stored mouse position. Set to private write as we don't want other classes to modify it, but still allow other classes to access it.
var IntPoint MousePosition; 

event PlayerInput(float DeltaTime)
{
  // Handle mouse 
  // Ensure we have a valid HUD
  if (myHUD != None) 
  {
    // Add the aMouseX to the mouse position and clamp it within the viewport width
    MousePosition.X = Clamp(MousePosition.X + aMouseX, 0, myHUD.SizeX); 
    // Add the aMouseY to the mouse position and clamp it within the viewport height
    MousePosition.Y = Clamp(MousePosition.Y - aMouseY, 0, myHUD.SizeY); 
  }

  Super.PlayerInput(DeltaTime);
}

defaultproperties
{
}

MouseInterfacePlayerController.uc 
class MouseInterfacePlayerController extends PlayerController;

// Null this function
function UpdateRotation(float DeltaTime);

defaultproperties
{   
  // Set the input class to the mouse interface player input
  InputClass=class'MouseInterfacePlayerInput'
}

MouseInterfaceHUD.uc 
class MouseInterfaceHUD extends HUD;

// The texture which represents the cursor on the screen
var const Texture2D CursorTexture;
// The color of the cursor
var const Color CursorColor;
// Pending left mouse button pressed event
var bool PendingLeftPressed;
// Pending left mouse button released event
var bool PendingLeftReleased;
// Pending right mouse button pressed event
var bool PendingRightPressed;
// Pending right mouse button released event
var bool PendingRightReleased;
// Pending middle mouse button pressed event
var bool PendingMiddlePressed;
// Pending middle mouse button released event
var bool PendingMiddleReleased;
// Pending mouse wheel scroll up event
var bool PendingScrollUp;
// Pending mouse wheel scroll down event
var bool PendingScrollDown;
// Cached mouse world origin
var Vector CachedMouseWorldOrigin;
// Cached mouse world direction
var Vector CachedMouseWorldDirection;
// Last mouse interaction interface
var MouseInterfaceInteractionInterface LastMouseInteractionInterface;

event PostRender()
{
  local MouseInterfacePlayerInput MouseInterfacePlayerInput;
  local MouseInterfaceInteractionInterface MouseInteractionInterface;
  local Vector HitLocation, HitNormal;

  Super.PostRender();

  // Ensure that we aren't using ScaleForm and that we have a valid cursor
  if (!UsingScaleForm && CursorTexture != None)
  {
    // Ensure that we have a valid PlayerOwner
    if (PlayerOwner != None)
    {
      // Cast to get the MouseInterfacePlayerInput
      MouseInterfacePlayerInput = MouseInterfacePlayerInput(PlayerOwner.PlayerInput);

      // If we're not using scale form and we have a valid cursor texture, render it
      if (MouseInterfacePlayerInput != None)
      {
        // Set the canvas position to the mouse position
        Canvas.SetPos(MouseInterfacePlayerInput.MousePosition.X, MouseInterfacePlayerInput.MousePosition.Y);
        // Set the cursor color
        Canvas.DrawColor = CursorColor;
        // Draw the texture on the screen
        Canvas.DrawTile(CursorTexture, CursorTexture.SizeX, CursorTexture.SizeY, 0.f, 0.f, CursorTexture.SizeX, CursorTexture.SizeY,, true);
      }
    }
  }

  // Get the current mouse interaction interface
  MouseInteractionInterface = GetMouseActor(HitLocation, HitNormal);

  // Handle mouse over and mouse out
  // Did we previously had a mouse interaction interface?
  if (LastMouseInteractionInterface != None)
  {
    // If the last mouse interaction interface differs to the current mouse interaction
    if (LastMouseInteractionInterface != MouseInteractionInterface)
    {
      // Call the mouse out function
      LastMouseInteractionInterface.MouseOut(CachedMouseWorldOrigin, CachedMouseWorldDirection);
      // Assign the new mouse interaction interface
      LastMouseInteractionInterface = MouseInteractionInterface; 

      // If the last mouse interaction interface is not none
      if (LastMouseInteractionInterface != None)
      {
        // Call the mouse over function
        LastMouseInteractionInterface.MouseOver(CachedMouseWorldOrigin, CachedMouseWorldDirection); // Call mouse over
      }
    }
  }
  else if (MouseInteractionInterface != None)
  {
    // Assign the new mouse interaction interface
    LastMouseInteractionInterface = MouseInteractionInterface; 
    // Call the mouse over function
    LastMouseInteractionInterface.MouseOver(CachedMouseWorldOrigin, CachedMouseWorldDirection); 
  }

  if (LastMouseInteractionInterface != None)
  {
    // Handle left mouse button
    if (PendingLeftPressed)
    {
      if (PendingLeftReleased)
      {
        // This is a left click, so discard
        PendingLeftPressed = false;
        PendingLeftReleased = false;
      }
      else
      {
        // Left is pressed
        PendingLeftPressed = false;
        LastMouseInteractionInterface.MouseLeftPressed(CachedMouseWorldOrigin, CachedMouseWorldDirection, HitLocation, HitNormal);
      }
    }
    else if (PendingLeftReleased)
    {
      // Left is released
      PendingLeftReleased = false;
      LastMouseInteractionInterface.MouseLeftReleased(CachedMouseWorldOrigin, CachedMouseWorldDirection);
    }

    // Handle right mouse button
    if (PendingRightPressed)
    {
      if (PendingRightReleased)
      {
        // This is a right click, so discard
        PendingRightPressed = false;
        PendingRightReleased = false;
      }
      else
      {
        // Right is pressed
        PendingRightPressed = false;
        LastMouseInteractionInterface.MouseRightPressed(CachedMouseWorldOrigin, CachedMouseWorldDirection, HitLocation, HitNormal);
      }
    }
    else if (PendingRightReleased)
    {
      // Right is released
      PendingRightReleased = false;
      LastMouseInteractionInterface.MouseRightReleased(CachedMouseWorldOrigin, CachedMouseWorldDirection);
    }

    // Handle middle mouse button
    if (PendingMiddlePressed)
    {
      if (PendingMiddleReleased)
      {
        // This is a middle click, so discard 
        PendingMiddlePressed = false;
        PendingMiddleReleased = false;
      }
      else
      {
        // Middle is pressed
        PendingMiddlePressed = false;
        LastMouseInteractionInterface.MouseMiddlePressed(CachedMouseWorldOrigin, CachedMouseWorldDirection, HitLocation, HitNormal);
      }
    }
    else if (PendingMiddleReleased)
    {
      PendingMiddleReleased = false;
      LastMouseInteractionInterface.MouseMiddleReleased(CachedMouseWorldOrigin, CachedMouseWorldDirection);
    }

    // Handle middle mouse button scroll up
    if (PendingScrollUp)
    {
      PendingScrollUp = false;
      LastMouseInteractionInterface.MouseScrollUp(CachedMouseWorldOrigin, CachedMouseWorldDirection);
    }

    // Handle middle mouse button scroll down
    if (PendingScrollDown)
    {
      PendingScrollDown = false;
      LastMouseInteractionInterface.MouseScrollDown(CachedMouseWorldOrigin, CachedMouseWorldDirection);
    }
  }
}

function MouseInterfaceInteractionInterface GetMouseActor(optional out Vector HitLocation, optional out Vector HitNormal)
{
  local MouseInterfaceInteractionInterface MouseInteractionInterface;
  local MouseInterfacePlayerInput MouseInterfacePlayerInput;
  local Vector2D MousePosition;
  local Actor HitActor;

  // Ensure that we have a valid canvas and player owner
  if (Canvas == None || PlayerOwner == None)
  {
    return None;
  }

  // Type cast to get the new player input
  MouseInterfacePlayerInput = MouseInterfacePlayerInput(PlayerOwner.PlayerInput);

  // Ensure that the player input is valid
  if (MouseInterfacePlayerInput == None)
  {
    return None;
  }

  // We stored the mouse position as an IntPoint, but it's needed as a Vector2D
  MousePosition.X = MouseInterfacePlayerInput.MousePosition.X;
  MousePosition.Y = MouseInterfacePlayerInput.MousePosition.Y;
  // Deproject the mouse position and store it in the cached vectors
  Canvas.DeProject(MousePosition, CachedMouseWorldOrigin, CachedMouseWorldDirection);

  // Perform a trace actor interator. An interator is used so that we get the top most mouse interaction
  // interface. This covers cases when other traceable objects (such as static meshes) are above mouse
  // interaction interfaces.
  ForEach TraceActors(class'Actor', HitActor, HitLocation, HitNormal, CachedMouseWorldOrigin + CachedMouseWorldDirection * 65536.f,         CachedMouseWorldOrigin,,, TRACEFLAG_Bullet)
  {
    // Type cast to see if the HitActor implements that mouse interaction interface
    MouseInteractionInterface = MouseInterfaceInteractionInterface(HitActor);
    if (MouseInteractionInterface != None)
    {
      return MouseInteractionInterface;
    }
  }

  return None;
}

function Vector GetMouseWorldLocation()
{
  local MouseInterfacePlayerInput MouseInterfacePlayerInput;
  local Vector2D MousePosition;
  local Vector MouseWorldOrigin, MouseWorldDirection, HitLocation, HitNormal;

  // Ensure that we have a valid canvas and player owner
  if (Canvas == None || PlayerOwner == None)
  {
    return Vect(0, 0, 0);
  }

  // Type cast to get the new player input
  MouseInterfacePlayerInput = MouseInterfacePlayerInput(PlayerOwner.PlayerInput);

  // Ensure that the player input is valid
  if (MouseInterfacePlayerInput == None)
  {
    return Vect(0, 0, 0);
  }

  // We stored the mouse position as an IntPoint, but it's needed as a Vector2D
  MousePosition.X = MouseInterfacePlayerInput.MousePosition.X;
  MousePosition.Y = MouseInterfacePlayerInput.MousePosition.Y;
  // Deproject the mouse position and store it in the cached vectors
  Canvas.DeProject(MousePosition, MouseWorldOrigin, MouseWorldDirection);

  // Perform a trace to get the actual mouse world location.
  Trace(HitLocation, HitNormal, MouseWorldOrigin + MouseWorldDirection * 65536.f, MouseWorldOrigin , true,,, TRACEFLAG_Bullet);
  return HitLocation;
}

defaultproperties
{
  CursorColor=(R=255,G=255,B=255,A=255)
  CursorTexture=Texture2D'EngineResources.Cursors.Arrow'
}
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Replies

  • Raptor-chan
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    Raptor-chan
    I got the MouseInterfaceInteractionInterface file fixed (had to remove the class line).I created my own HUD so I don't need any references to Scaleform or GFx. I've been removing those parts of the code and come up with this error:

    th_scaleform_error.png

    Is there a way to delete the reference to scaleform without hurting the rest of my files? Any help would be greatly appreciated. Thank you!
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