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1.16.5 Change sprinting modifier, SPEED_MODIFIER_SPRINTING


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Hi, I'm trying to change the sprinting modifier for an entity extended from a HorseEntity. I have tried overriding the setSprinting method from LivingEntity like so.

	private static final UUID SPEED_MODIFIER_SPRINTING_UUID = UUID.fromString("662A6B8D-DA3E-4C1C-8813-96EA6097278D");
	private static final AttributeModifier SPEED_MODIFIER_SPRINTING = new AttributeModifier(SPEED_MODIFIER_SPRINTING_UUID, "Sprinting speed boost", 5.0D , AttributeModifier.Operation.MULTIPLY_TOTAL);

	@Override
	public void setSprinting(boolean p_70031_1_) {
		this.setSharedFlag(3, p_70031_1_);
	    ModifiableAttributeInstance modifiableattributeinstance = this.getAttribute(Attributes.MOVEMENT_SPEED);
	    if (modifiableattributeinstance.getModifier(SPEED_MODIFIER_SPRINTING_UUID) != null) {
	       modifiableattributeinstance.removeModifier(SPEED_MODIFIER_SPRINTING);
	    }
	    if (p_70031_1_) {
	       modifiableattributeinstance.addTransientModifier(SPEED_MODIFIER_SPRINTING);
	    }
	}

But the method does not seem to be run when sprinting. The only other way I can think to do this is using an access transformer to make the modifier public.

Any help would be greatly appreciated.

Edited by henzo800
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You need to make your own modifier with its own ID (otherwise Minecraft will ignore you and consider the two modifiers the same).

Then add your own modifier on top of the vanilla modifier.

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Ok, so I have created my modifier like so,

private static final UUID CAR_SPEED_MODIFIER_SPRINTING_UUID = UUID.fromString("889db856-9d63-45c8-8f9a-b9ac68b509a3");
private static final AttributeModifier CAR_SPEED_MODIFIER_SPRINTING = new AttributeModifier(CAR_SPEED_MODIFIER_SPRINTING_UUID, "Sprinting speed boost", 5.0D , AttributeModifier.Operation.MULTIPLY_TOTAL);

//constructors and whatnot

	@Override //overriding net.minecraft.entity.LivingEntity.setSprinting
	public void setSprinting(boolean p_70031_1_) {
		this.setSharedFlag(3, p_70031_1_);
	    ModifiableAttributeInstance modifiableattributeinstance = this.getAttribute(Attributes.MOVEMENT_SPEED);
	    if (modifiableattributeinstance.getModifier(CAR_SPEED_MODIFIER_SPRINTING_UUID) != null) {
	       modifiableattributeinstance.removeModifier(CAR_SPEED_MODIFIER_SPRINTING);
	       STAR.LOGGER.debug("Sprint overr c1:" + CAR_SPEED_MODIFIER_SPRINTING_UUID);
	    }
	    if (p_70031_1_) {
	       modifiableattributeinstance.addTransientModifier(CAR_SPEED_MODIFIER_SPRINTING);
	       STAR.LOGGER.debug("Sprint overr c2:" + CAR_SPEED_MODIFIER_SPRINTING_UUID);
	    }
	}

But the override method still does not seem to be running at all. Is there an event or something I need to use.

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Ha, lol, I got confused between galloping and sprinting.

Turns out horses gallop not sprint. Anyway I just override the gallop method instead and it works a treat. 

Thanks for your help

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