I have a float Capabilty for players and I have it so that it increases by 0.05 when a certain item is used.

But when I use the item it does not increase exactly. (For example, instead of going from 1.05 to 1.1, it goes to 1.0999999).

How would I fix this?

 

Relevant code:

// SkillLevel.java
public class SkillLevel implements ISkillLevel {

    private float level = 1F;

    @Override
    public void remove(float num) {
        this.level -= num;
    }

    @Override
    public void add(float num) { this.level += num; }

    @Override
    public void set(float num) {
        this.level = num;
    }

    @Override
    public float getLevel() {
        return this.level;
    }

public static class SkillLevelProvider implements ICapabilitySerializable<FloatNBT> {

    @CapabilityInject(ISkillLevel.class)
    public static Capability<ISkillLevel> SKILL_CAP;

    private LazyOptional<ISkillLevel> instance = LazyOptional.of(SKILL_CAP::getDefaultInstance);

    @Nonnull
    @Override
    public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap, @Nullable Direction side) {
        return SKILL_CAP.orEmpty(cap, instance);
    }
    @Override
    public FloatNBT serializeNBT() {
        return (FloatNBT) SKILL_CAP.getStorage().writeNBT(SKILL_CAP, instance.orElseThrow(() -> new IllegalArgumentException("LazyOptional cannot be empty!")), null);
    }

    @Override
    public void deserializeNBT(FloatNBT nbt) {
        SKILL_CAP.getStorage().readNBT(SKILL_CAP, instance.orElseThrow(() -> new IllegalArgumentException("LazyOptional cannot be empty!")), null, nbt);
    }
}

@Override
    public ActionResult<ItemStack> onItemRightClick(World worldIn, PlayerEntity playerIn, Hand handIn) {
      ISkillLevel skill = playerIn.getCapability(SkillLevel.SkillLevelProvider.SKILL_CAP).orElse(null);
      skill.add(0.05f);
      System.out.println(skill.getLevel());
    }

Thanks!

5 minutes ago, ScottBot10 said:

How would I fix this?

Make a computer that has infinite accuracy. Your problem lies with the precision of floating point notation.

https://floating-point-gui.de/

2 minutes ago, diesieben07 said:

Another one:

https://www.youtube.com/watch?v=PZRI1IfStY0

 

Either change your units so you don't need fractions (e.g. don't store $2.55, store 255 cents) or use BigDecimal.

Thanks! Works now.