Load Obj Models

[drok0920]

Hello,

I would like to know if it is possible to load obj models to use for items/entities.  Im using 1.12.  If this is possible could you please inform me how to do it.

 

Thank you,

Drok

[V0idWa1k3r]

For entities you need your own obj model loader/renderer.

For items/blocks you need to put your model and material(.obj and .mtl files) in an appropriate models subfolder in your assets, point to that model through a blockstates file for example(if you are using forge's blockstates for items) and you are done. There are a few thing you need to know:

1. When specifying an obj model to be used you must include the obj extension in the path too.

2. You must call OBJLoader.INSTANCE.addDomain(modid) with your modid as a parameter before the models are loaded.

Here(and the resources folder) is an example provided by forge itself.

[drok0920]

2 minutes ago, V0idWa1k3r said:

Thank you for the help although i am still a bit confused.  So I just point to it in the item.json / blockstate.json and then call  OBJLoader.INSTANCE.addDomain(modid) in preinit?

 

[V0idWa1k3r]

Pretty much, although I've never done it through the item.json model and I do not know if it is possible. You can still have obj models for items as forge can use blockstates files to define item models.

And you should probably call it not in your preinit but in your ModelRegistryEvent or at least in your client proxy. but yeah, that's pretty much it.

[drok0920]

Ok can you give me an example on how to use block state for items?  And how do i use model registry event.

[V0idWa1k3r]

Blockstates for items: blockstates files, model loading (yep, it is the same stuff I've already linked as that code uses blockstates for items(to be fair it uses them for itemblocks but there is no difference whatsoever for other items too)). The idea is - when you are loading a model for an item forge will first look in the models/item folder to find the model file, and if it can't find any it will look in your blockstates folder for the blockstates file. The syntax is absolutely the same and everything functions as you would expect it to, just for items instead of blocks.

ModelRegistryEvent. 

[drok0920]

Ok thank you so much for your help.

[drok0920]

Ok i have tried to implement this to no avail.  Any idea what im doing wrong?

 

Spoiler

ak47.json:

{
    "forge_marker": 1,
    "defaults": {
        "textures": {
            "#Material": "progressiveg:ak47_oak" //the identifier must be a name of a material defined by the "model" obj's .mtl file
        },
        "model": "progressiveg:ak47_0.obj"
     },
    "variants": {
        "normal": [{
            "textures": {
                "#Material": "progressiveg:ak47_oak" //the identifier must be a name of a material defined by the "model" obj's .mtl file
            }
        }],
        "oak_1": [{
            "textures": {
                "#Material": "progressiveg:ak47_oak" //the identifier must be a name of a material defined by the "model" obj's .mtl file
        }
        }]
    }
}

{
    "forge_marker": 1,
    "defaults": {
        "textures": {
			"#Material": "progressiveg:ak47_oak" //the identifier must be a name of a material defined by the "model" obj's .mtl file
        },
        "model": "progressiveg:ak47_0.obj"
     },
    "variants": {
        "normal": [{
			"textures": {
				"#Material": "progressiveg:ak47_oak" //the identifier must be a name of a material defined by the "model" obj's .mtl file
			}
		}],
        "oak_1": [{
            "textures": {
				"#Material": "progressiveg:ak47_oak" //the identifier must be a name of a material defined by the "model" obj's .mtl file
        }
        }]
    }
}

 

ModRegistryEvent:

@SubscribeEvent
    public static void registerModels(ModelRegistryEvent event)
    {
        OBJLoader.INSTANCE.addDomain("progressiveg");
        Item[] woodItems = {
            ModItems.ak47
        };
        for (Item item : woodItems) {
        	ModelLoader.setCustomModelResourceLocation(item, 0, new ModelResourceLocation(item.getRegistryName(), "normal"));
        	ModelLoader.setCustomModelResourceLocation(item, 1, new ModelResourceLocation(item.getRegistryName(), "oak_1"));
        }
    }

 

 

And i attached a picture of my asset folders and what it looks like in game.

 

[V0idWa1k3r]

Show the log file, it usually contains descriptive errors. Also make sure that your material(not the file) is actually called Material.

 

[drok0920]

https://pastebin.com/R4HxgLqT

I see that one of the problems is it's looking for the wrong material so ill fix that but there are alot of other errors

[V0idWa1k3r]

Caused by: java.io.FileNotFoundException: progressiveg:models/item/ak_47_0.mtl

Yeah, fix the wrong material and post the new log. Remember that the obj file must also be named the same as the mtl file.

[drok0920]

https://pastebin.com/whCW3B2h

Sorry about the last paste bin didnt realize it thought it was spam lol.

Edited June 27, 2017 by drok0920
Changed Pastebin link to most recent.

[V0idWa1k3r]

Caused by: java.lang.RuntimeException: OBJLoader.Parser: Exception parsing line #232: `f 66/1/1 67/2/1 65/3/1`

Your model's face definition is invalid. 

Caused by: java.lang.NullPointerException

    at net.minecraftforge.client.model.obj.OBJModel$Material.access$100(OBJModel.java:595) ~[OBJModel$Material.class:?]

Looks like something went wrong with the material, it might be null. Post your obj file somewhere so I can check if it is correct.

[drok0920]

Ok here it is also does it matter if faces are triangulated or not?

ak47_0.obj

[V0idWa1k3r]

1 minute ago, drok0920 said:

also does it matter if faces are triangulated or not?

I am not sure, I'll try it out later.

 

L #230 : usemtl None

You need to provide an actual material for the object in your model editor.

Also should there not be an object definition(o name) at the beggining of the file right after the material file definition?  

 

It seems that you've made your model incorrectly in your model editor.

[drok0920]

I made it in blender and it did have a material  it just exported the material with the name None but i edited it and changed the name on both the obj and the mtl but i still get the other errors like the one on like 232

[V0idWa1k3r]

Well, I've tested it and it seems that triangulated faces load and render just fine for items so that seems to not be an issue.

Can you please provide new fixed obj and mtl files?

[drok0920]

Hehe i just realized when i went to get the files for you that i have two copies of the files and i edited the wrong one which is why i still got  the error.  It works fine now thank you!

[drok0920]

Hmm the UV coords dont seem to import correctly and i doing something wrong?  They work in my modelling soft ware but not in minecraft.

[V0idWa1k3r]

Minecraft inverts the V axis for whatever reason afaik. Flip the UV map vertically and it should work.

[theozove]

I do not understand anything, I have to put the model in the models folder and then I run the "gradlew.bat"?

[Thegametutor101]

@drok0920 I know this post was made a long time ago but I am also having similar errors to yours in this post...can you please tell me what did you change in your files to get from the black and purple cube in the middle of the screen to the 3d model you wanted??

That might help me out. I've gone through this post 4 times and the links provided in it and still cant fix that issue.

 

If you can help me...Thank you!

Edited April 21, 2019 by Thegametutor101