Victor Anton Dominguez sephirot47

## UE4 Little UMG or Set UMG size or Set UMG Position .cpp
/*
The key to this is to make a normal UMG, but use the Blueprint function SetAnchors, where Minimum and Maximum inputs to this function go from 0.0 -> 1.0 (normalized screen size).
For example, if I want to put an UMG which only occupies the right bottom corner of the screen, I would use:
	SetAnchors, where Minimum = (0.5, 0.5) and Maximum = (1.0, 1.0)
*/

## UE4 Interesting documentation links
UFUNCTION: https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/Reference/Functions/index.html
RAY TRACING: https://wiki.unrealengine.com/Trace_Functions

## UE4 Set-Change Material .cpp
void ChangeMaterial(UMaterial *material)
{
	TArray<UStaticMeshComponent*> meshes;
	GetComponents<UStaticMeshComponent>(meshes); //Get all the mesh components
	for (UStaticMeshComponent *mesh : meshes)
		mesh->SetMaterial(0, material);            //For each mesh component, set the material (the 0 is the element index of the material)
}

## gist:8e475b090d4314b6a628
/*
IMPORTANT!
In order to be able to use this functions, in the file "YourProject.h" change this:

    #include "EngineMinimal.h"

For this:

    #include "Engine.h"

## GLSL Raymarch ShaderToy tutorial and example code
/*
a shader executes per pixel
so every thing you see here is he function for every pixel

raymarching is in principe a function that finds the closest point to any surface in the world
then we move our point by that distance and use the same function,
the function will probably be closer to an object in the world every time
and after about 40 to 200 iterations you'll either have found an object or
missed them all into infinity

## UE4 UPROPERTY UFUNCTION
UPROPERTY(EditAnywhere, Category=Pawn)
float speed;

UFUNCTION(BlueprintCallable, Category=Attachment)
void do() { }

## UE4 Bind Action
character->InputComponent->BindAction("Jump", IE_Pressed, this, &AMyCharacter::HandleJump);
character->InputComponent->BindAction("Jump", IE_Released, this, &AMyCharacter::HandleJump);

## UE4 World to screen point
//From the actor's viewport (camera)
FVector2D result;
UGameplayStatics::GetPlayerController(actor, 0)->ProjectWorldLocationToScreen(pointInWorld, result);
//result now has the screen point(x,y)

## UE4 Get Player Controller of an Actor
UGameplayStatics::GetPlayerController(actor, 0)

## UE4 Load Texture

//En el constructor (no el BeginPlay)

UTexture2D *texture;
static ConstructorHelpers::FObjectFinder<UTexture2D> Texture(TEXT("/Game/StarterContent/Textures/T_Spark_Core.T_Spark_Core"));
texture = Texture.Object;
	/*
	The key to this is to make a normal UMG, but use the Blueprint function SetAnchors, where Minimum and Maximum inputs to this function go from 0.0 -> 1.0 (normalized screen size).
	For example, if I want to put an UMG which only occupies the right bottom corner of the screen, I would use:
	SetAnchors, where Minimum = (0.5, 0.5) and Maximum = (1.0, 1.0)
	*/
	UFUNCTION: https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/Reference/Functions/index.html
	RAY TRACING: https://wiki.unrealengine.com/Trace_Functions
	void ChangeMaterial(UMaterial *material)
	{
	TArray<UStaticMeshComponent*> meshes;
	GetComponents<UStaticMeshComponent>(meshes); //Get all the mesh components
	for (UStaticMeshComponent *mesh : meshes)
	mesh->SetMaterial(0, material); //For each mesh component, set the material (the 0 is the element index of the material)
	}
	/*
	IMPORTANT!
	In order to be able to use this functions, in the file "YourProject.h" change this:

	#include "EngineMinimal.h"

	For this:

	#include "Engine.h"
	/*
	a shader executes per pixel
	so every thing you see here is he function for every pixel

	raymarching is in principe a function that finds the closest point to any surface in the world
	then we move our point by that distance and use the same function,
	the function will probably be closer to an object in the world every time
	and after about 40 to 200 iterations you'll either have found an object or
	missed them all into infinity
	UPROPERTY(EditAnywhere, Category=Pawn)
	float speed;

	UFUNCTION(BlueprintCallable, Category=Attachment)
	void do() { }
	character->InputComponent->BindAction("Jump", IE_Pressed, this, &AMyCharacter::HandleJump);
	character->InputComponent->BindAction("Jump", IE_Released, this, &AMyCharacter::HandleJump);
	//From the actor's viewport (camera)
	FVector2D result;
	UGameplayStatics::GetPlayerController(actor, 0)->ProjectWorldLocationToScreen(pointInWorld, result);
	//result now has the screen point(x,y)

	//En el constructor (no el BeginPlay)

	UTexture2D *texture;
	static ConstructorHelpers::FObjectFinder<UTexture2D> Texture(TEXT("/Game/StarterContent/Textures/T_Spark_Core.T_Spark_Core"));
	texture = Texture.Object;