[1.12.2] Simplest way to render a moving object?

[nocot]

I'm creating a train mod and I need to place a train object that will change its position every frame (to look like it's moving). I found two modelling programs - Tabula and Workbench. The first one creates a class file that is probably a tesselator instruction set. The second one can create .json and .obj file. All I want is to render a model in a fixed position and rotation that can change every frame.

 

So I mean, I just want to call some function like this every frame:

@SubscribeEvent
public int renderTrain(blahblahEveryFrameEvent event)
{
	renderTrain(MY_MODEL, XPOS, YPOS, ZPOS, ...);
}

 

What is the simplest way through loading model and displaying it by calling a function? Do I really have to mess with all the tile entity stuff?

Or there is somehow no need to call that function manually?

[Cadiboo]

Are you trying to render an entity or are you rendering the train into at GUI or straight into the HUD?

[nocot]

I'm trying to render a train as a normal 3D object, just as any other block or item in the world; so not as the part of HUD. Is it possible to render it as a 3D item, in a player independent position?

[Animefan8888]

2 minutes ago, nocot said:

I'm trying to render a train as a normal 3D object, just as any other block or item in the world; so not as the part of HUD. Is it possible to render it as a 3D item, in a player independent position?

Yes. And does it have to be non cuboud? If not I reccomend using the animation system along with a json and you will need a Tile Entity for this either way.

[Cadiboo]

5 minutes ago, nocot said:

I'm trying to render a train as a normal 3D object, just as any other block or item in the world; so not as the part of HUD. Is it possible to render it as a 3D item, in a player independent position?

Your train is a block?

[nocot]

I'm still on deep research part, so I haven't started writing a mod for good. I think a train cannot be loaded as a block if it has to be moveable - but maybe I'm wrong and something has changed.

 

I know that entity stuff will come for me with writing a train physics and so on, but I still think that making an entity just for displaying a 3D model is a way too complicated and I look for other methods.

 

So, making a train an item isn't that bad idea? I heard that a minecart did something like that too.

[Cadiboo]

1 minute ago, nocot said:

I'm still on deep research part, so I haven't started writing a mod for good. I think a train cannot be loaded as a block if it has to be moveable - but maybe I'm wrong and something has changed.

 

I know that entity stuff will come for me with writing a train physics and so on, but I still think that making an entity just for displaying a 3D model is a way too complicated and I look for other methods.

 

So, making a train an item isn't that bad idea? I heard that a minecart did something like that too.

What????? Forgive the question marks I don’t understand what your saying.

your options are.

1) block - can’t move, occupies physical space in the world

2) item - can’t move, doesn’t occupy space in the world

3) rendering into the GUI - even worse than item

4) entity - movable, rideable, large control over rendering, occupies space in the world

[nocot]

Ahh yeah, forgive me, I'm just a begginner and I just don't understand many things that good. But that's my bad.

 

I must have misinterpretated informations about entities that I've searched, so I must go back and study about it. I think, that's it.

[Animefan8888]

30 minutes ago, nocot said:

Ahh yeah, forgive me, I'm just a begginner and I just don't understand many things that good. But that's my bad.

 

I must have misinterpretated informations about entities that I've searched, so I must go back and study about it. I think, that's it.

Well do you want it to freely move around the world/like a minecart? Or will it be stationary like a model train? Use a custom entity for the first one which can be rendered with any of the proposed methods, though a Java model file might be easiest to implement. But if you feel you need to go back and study a bit more that is fine.

[nocot]

Thank you for the answer. Well, it has to be moving around the world by a track, like a minecart. So I think I'll start with creating an entity based on minecart's one and slightly modifying it. I think it will be a good point to start with entities and to better understand them.

[Cadiboo]

17 minutes ago, nocot said:

Thank you for the answer. Well, it has to be moving around the world by a track, like a minecart. So I think I'll start with creating an entity based on minecart's one and slightly modifying it. I think it will be a good point to start with entities and to better understand them.

Just make a basic entity that extends Minecraft rideable & register it & get it to work, then go into rendering

[nocot]

Hello again. I copied ItemMinecart to my own item which I called ItemTram so I can use it like a normal minecart placer. Then I created an entity which temporarly just extends EntityMinecart and do nothing more. The problem started when I tried to change an entity calling function in my ItemTram class:

 

EntityMinecart entityminecart = EntityMinecart.create(world, d0, d1 + d3, d2, ((ItemMinecart)stack.getItem()).minecartType);

to call my new entity:

EntityTram entityminecart = EntityTram.create(world, d0, d1 + d3, d2, ((ItemTram)stack.getItem()).minecartType);

 

and my entity is:

package com.kg.transportmod;

import net.minecraft.entity.item.EntityMinecart;
import net.minecraft.util.DamageSource;
import net.minecraft.world.World;

public class EntityTram extends EntityMinecart{
  
	public EntityTram(World worldIn, double x, double y, double z, EntityTram.Type type) {
		super(worldIn, x, y, z);
	}

	@Override
	public Type getType() {
		return null;
	}
}

 

Eclipse just gives me an answer that entity tram is not compatible with entity minecart. I can cast to entity tram but a Minecraft gives then a runtime error that it can't be casted to entity tram. What am I doing wrong? Isn't that the way I can copy an entity?

[Draco18s]

Try looking at my thing:

https://github.com/Draco18s/ReasonableRealism/blob/1.12.1/src/main/java/com/draco18s/ores/item/ItemEntityOreCart.java#L96-L143