Curves, Create Custom Cubic Curves In Editor For Use In Code - Epic Wiki
# Curves, Create Custom Cubic Curves In Editor For Use In Code
# Contents
# Overview
This wiki tutorial shows you how to get custom hand crafted curves into C++ !
This uses a combination of UE4 blueprints and UE4 c++ to enable you to create custom effects and physics movement curves in pure C++ with the ease of UE4's visual curve editor!
Below is a picture of the final result!
I draw this curve in the editor and and can now use it in C++ !
# UE4 Curve Asset
# UE4 Curve Editor
# .h
UCLASS()
class AYourCharacter : public ACharacter
{
GENERATED_UCLASS_BODY()
/** Joy Curve */
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category="JoyCurve")
UCurveFloat* JoyCurve;
//Rama's Draw Point wrapper
FORCEINLINE void DrawPoint
(
const FVector& Loc,
const float Size = 7,
const FColor& Color = FColor::Red,
const float Duration=-1.f
) const {
DrawDebugPoint(
GetWorld(),
Loc,
Size, //thickness
Color,
false,
Duration
);
}
# .cpp
//Tick void AYourCharacter::Tick(float DeltaTime) { Super::Tick(DeltaTime); //~~~~~~~~~~~~ //~~~ Draw the Curve! ~~~ if(JoyCurve) { for(float v = 0; v < 1; v+=0.01) { DrawPoint(GetActorLocation() + FVector(v * 128,0,128 * JoyCurve->GetFloatValue(v)) ); } } else { //UE_LOG "Joy CURVE IS INVALID!!!!"; } }
# Character BP
Compile the above addition to your Character class!
Now set the asset reference that you made in the code, in the editor in your character BP!
# Conclusion
Enjoy!
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