Errors while trying to draw HUD

Development Programming & Scripting UI
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1

I’m currently on part 3.5 of the beginner fps tutorial, and am trying to write the code nessacary in order to draw the hud.
Only problem is, once i write in the code, i get about 24 errors, consisting of messages like:

>`'TileItem': undeclared identifier	
>'FCanvasTileItem': undeclared identifier	
>'CrossHairDrawPosition': undeclared identifier	
>identifier "SE_BLEND_Translucent" is undefined

this is my HUD header file:

#include "GameFramework/HUD.h"
#include "BasicFpsHUD.generated.h"

/**
 * 
 */
UCLASS()
class BASICFPS_API ABasicFpsHUD : public AHUD
{
	GENERATED_BODY()
	

protected:
	//creates a pointer to a crosshair texture that will be drawn at the center of the screen.
	UPROPERTY(EditAnywhere)
	UTexture2D * CrosshairTexture;


public:
	//calls for the HUD to be drawn.
	virtual void DrawHUD() override;


	
	
};

This is my HUD cpp file:

// Fill out your copyright notice in the Description page of Project Settings.

#include "BasicFpsHUD.h"


void ABasicFpsHUD::DrawHUD()
{
	Super::DrawHUD();

	if (CrosshairTexture)
	{
		//find the center of the canvas on the HUD.
		FVector2D Center(Canvas->ClipX * 0.5f, Canvas->ClipY * 0.5f);

		//offset by half the dimensions so that the centre of the texture aligns with the center of the canvas.
		FVector2D CrossHairDrawPosition(Center.X - (CrosshairTexture->GetSurfaceWidth() * 0.5f);


		//draw crosshair at the centrepoint.
		FCanvasTileItem TitleItem(CrossHairDrawPosition, CrosshairTexture->Resource, FLinearColor::White);
		TileItem.BlendMode = SE_BLEND_Translucent;
		Canvas->DrawItem(TileItem);
	}
}

I’m thinking a missing header file, but the problem is: which one?

part of the tutorial i’m on:

https://docs.unrealengine.com/latest/INT/Programming/Tutorials/FirstPersonShooter/3/5/index.html

EDIT:

I’ve fixed the problem, there were mostly a few typos, in conjunction to too few argument types passed into CrossHairDrawPosition

the orginal code was:

FVector2D CrossHairDrawPosition(Center.X - (CrosshairTexture->GetSurfaceWidth() * 0.5f)))

instead of:

FVector2D CrossHairDrawPosition(Center.X - (CrosshairTexture->GetSurfaceWidth() * 0.5f), Center.Y - (CrosshairTexture->GetSurfaceHeight) * 0.5f);
2

I have the same problem.Have you solved this problem?

3

Unfortunately not, but i’ll keep you posted if i do get a solution

4

At least I see one misprint:
On line 20 there is FCanvasTileItem TitleItem but next it is named TileItem

Next error may be caused bu obsolete syntax - try to use ESimpleElementBlendMode::SE_BLEND_Translucent instead of SE_BLEND_Translucent

5

See edit in the post: I’ve fixed the problem

6

But I was told that I used the undefined type “UCanvas”,whats wrong?

7

But I was told that I used the undefined type “UCanvas”,whats wrong?

8

But I was told that I used the undefined type “UCanvas”,whats wrong?

9

I know this is old, but I found the solution. UE4 changed the way it includes files. It used to be all in one, but now you must include files individually. Search the UE4 C++ API for each item for the header file.

for these, they are:

#include "Runtime/Engine/Classes/Engine/Texture2D.h"
#include "Runtime/Engine/Public/CanvasItem.h"
#include "Runtime/Engine/Classes/Engine/Canvas.h"
10

Thanks for providing these headers, I was stuck on this for so long!