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[1.15.2]How do I fire events?


kyazuki

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My mod changes player's height on every tick.

So I use EntityEvent.EyeHeight#SetNewHeight method.

I want to fire the event on every tick.

This cord doesn't work.

What's wrong?

@SubscribeEvent
  public static void sethitboxPlayer(TickEvent.PlayerTickEvent event) {
    float hitboxScale = event.player.getHeight() * scale;
    AxisAlignedBB playerBoundingBox = event.player.getBoundingBox();
    event.player.setBoundingBox(new AxisAlignedBB(playerBoundingBox.minX, playerBoundingBox.minY, playerBoundingBox.minZ, playerBoundingBox.maxX, playerBoundingBox.minY + hitboxScale, playerBoundingBox.maxZ));
    
    Pose pose = event.player.getPose();
    EntitySize size = event.player.getSize(pose);
    net.minecraftforge.event.entity.EntityEvent.EyeHeight evt = new net.minecraftforge.event.entity.EntityEvent.EyeHeight(event.player, pose, size, event.player.getEyeHeight(pose));
    net.minecraftforge.common.MinecraftForge.EVENT_BUS.post(evt);
  }

 

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Just because you fired the event doesn't mean Forge is listening. And Forge is never listening to its own events. Events are for mods to listen to and do what they want.

 

(read: that's not how you set the eye height)

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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Sorry for my lack of explanation.

I set the eye height by this cord.

It works, but it fires only when the pose changes.

Can't I fire Forge events manually in my mod?

@SubscribeEvent
  public static void setEyePlayer(EntityEvent.EyeHeight event) {
    if (event.getEntity() instanceof PlayerEntity) {
      PlayerEntity player = (PlayerEntity) event.getEntity();
      event.setNewHeight(event.getOldHeight() * scale);
    }
  }

 

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10 minutes ago, kyazuki said:

Can't I fire Forge events manually in my mod?

You can; however, that is not what you want to do in this case.

Why do you want to change the eye height every tick? What are you trying to achieve?

AFAIK you only need to change the eye height when the event fires, as the event is used for all cases of determining an entity's eye height.

 

31 minutes ago, Draco18s said:

And Forge is never listening to its own events.

I think there are a few exceptions such as ForgeInternalHandler.

Edited by DavidM

Some tips:

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2. Always post your code.

3. Never copy and paste code. You won't learn anything from doing that.

4. 

Quote

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5. Learn to use your IDE, especially the debugger.

6.

Quote

The "picture that's worth 1000 words" only works if there's an obvious problem or a freehand red circle around it.

Support & Bug Reports:

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1. Read the EAQ before asking for help. Remember to provide the appropriate log(s).

2. Versions below 1.11 are no longer supported due to their age. Update to a modern version of Minecraft to receive support.

 

 

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10 minutes ago, kyazuki said:

Can't I fire Forge events manually in my mod?

Yes you can. However you fire the event and your event only sets the events new height. It doesn't actually set the eye height. When the event is normally fired you'll notice that after it has fired forge takes the new eye height from the event and uses that.

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3 minutes ago, DavidM said:

I think there are a few exceptions such as ForgeInternalHandler.

Fair enough, but in general, Forge fires events and doesn't listen for them.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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20 minutes ago, DavidM said:

Why do you want to change the eye height every tick? What are you trying to achieve?

My mod makes player tall as the player walks.

@SubscribeEvent
  public static void calc(TickEvent.PlayerTickEvent event) {
    if (!event.player.world.isRemote()) {
      walkDistance = event.player.distanceWalkedModified / 0.6f;
      scale = walkDistance * 0.001f + minScale;
    }
  }

However, I can't access player's height.

So I change render scale, hitbox and eye height.

@SubscribeEvent
  public static void onRenderPlayerPre(RenderPlayerEvent.Pre event) {
    event.getMatrixStack().push();
    event.getMatrixStack().scale(1.0f, scale, 1.0f);
  }

  @SubscribeEvent
  public static void onRenderPlayerPost(RenderPlayerEvent.Post event) {
    event.getMatrixStack().pop();
  }
@SubscribeEvent
  public static void sethitboxPlayer(TickEvent.PlayerTickEvent event) {
    float hitboxScale = event.player.getHeight() * scale;
    AxisAlignedBB playerBoundingBox = event.player.getBoundingBox();
    event.player.setBoundingBox(new AxisAlignedBB(playerBoundingBox.minX, playerBoundingBox.minY, playerBoundingBox.minZ, playerBoundingBox.maxX, playerBoundingBox.minY + hitboxScale, playerBoundingBox.maxZ));
    //Fire EyeHeightEvent
  }
@SubscribeEvent
  public static void setEyePlayer(EntityEvent.EyeHeight event) {
    if (event.getEntity() instanceof PlayerEntity) {
      PlayerEntity player = (PlayerEntity) event.getEntity();
      event.setNewHeight(event.getOldHeight() * scale);
    }
  }

 

Edited by kyazuki
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You can subscribe to PlayerTickEvent and manually change Entity::eyeHeight to fit your need. After that, simply simulate what Entity#recalculateSize does on the PlayerEntity.

Some tips:

Spoiler

Modder Support:

Spoiler

1. Do not follow tutorials on YouTube, especially TechnoVision (previously called Loremaster) and HarryTalks, due to their promotion of bad practice and usage of outdated code.

2. Always post your code.

3. Never copy and paste code. You won't learn anything from doing that.

4. 

Quote

Programming via Eclipse's hotfixes will get you nowhere

5. Learn to use your IDE, especially the debugger.

6.

Quote

The "picture that's worth 1000 words" only works if there's an obvious problem or a freehand red circle around it.

Support & Bug Reports:

Spoiler

1. Read the EAQ before asking for help. Remember to provide the appropriate log(s).

2. Versions below 1.11 are no longer supported due to their age. Update to a modern version of Minecraft to receive support.

 

 

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5 minutes ago, DavidM said:

You can subscribe to PlayerTickEvent and manually change Entity::eyeHeight to fit your need. After that, simply simulate what Entity#recalculateSize does on the PlayerEntity.

Entity::eyeHeight is private...

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8 minutes ago, kyazuki said:

Entity::eyeHeight is private...

Use reflection.

Some tips:

Spoiler

Modder Support:

Spoiler

1. Do not follow tutorials on YouTube, especially TechnoVision (previously called Loremaster) and HarryTalks, due to their promotion of bad practice and usage of outdated code.

2. Always post your code.

3. Never copy and paste code. You won't learn anything from doing that.

4. 

Quote

Programming via Eclipse's hotfixes will get you nowhere

5. Learn to use your IDE, especially the debugger.

6.

Quote

The "picture that's worth 1000 words" only works if there's an obvious problem or a freehand red circle around it.

Support & Bug Reports:

Spoiler

1. Read the EAQ before asking for help. Remember to provide the appropriate log(s).

2. Versions below 1.11 are no longer supported due to their age. Update to a modern version of Minecraft to receive support.

 

 

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