models

Models is where Minecraft models are literally defined and you can find them at

📦resource_pack.zip
  └── 📁assets
       └── 📁minecraft
           └── 📁models
               └── 📁item
                   └── 📑diamond.json

models are defined by assets/<namespace>/models/example.json which inside a json is put as <namespace>:example.json

An example of a common item would be

{
  "parent": "minecraft:item/generated",
  "textures": {
    "layer0": "minecraft:item/diamond"
  }
}

and something like a sword

{
  "parent": "minecraft:item/handheld",
  "textures": {
    "layer0": "minecraft:item/diamond_sword"
  }
}

Parameter	Description
parent	The parents are reference to other models that will copy exactly that model and will make the changes that are specified, in this case it is reference to assets/minecraft/models/item/handheld.json
textures	here the texture is defined by models, in the case of item/generated it has “layer0” and “layer1” which is used in armor trims

example of layer0 & layer1

diamond_helmet_iron_trim.json

{
  "parent": "minecraft:item/generated",
  "textures": {
    "layer0": "minecraft:item/diamond_helmet",
    "layer1": "minecraft:trims/items/helmet_trim_iron"
  }
}

Useful Parents

minecraft:item/generated

{
  "parent": "minecraft:item/generated",
  "textures": {
    "layer0": "minecraft:item/allay_spawn_egg"
  }
}

minecraft:item/handheld

{
  "parent": "minecraft:item/handheld",
  "textures": {
    "layer0": "minecraft:item/diamond_sword"
  }
}

minecraft:item/trident_throwing

{
  "parent": "minecraft:item/trident_throwing",
  "textures": {
    "layer0": "minecraft:item/trident",
    "particle": "minecraft:item/trident"
  }
}

minecraft:item/trident_in_hand

{
  "parent": "minecraft:item/trident_in_hand",
  "textures": {
    "layer0": "minecraft:item/trident",
    "particle": "minecraft:item/trident"
  }
}

minecraft:block/crop

{
  "parent": "minecraft:block/crop",
  "textures": {
    "crop": "minecraft:block/wheat_stage0"
  }
}

minecraft:block/leaves

{
    "parent": "minecraft:block/leaves",
    "textures": {
        "all": "minecraft:block/custom/palm_leaves"
    }
}

minecraft:block/cross

{
    "parent": "minecraft:block/cross",
    "textures": {
        "cross": "minecraft:block/custom/palm_sapling"
    }
}

minecraft:block/cube_all

{
    "parent": "minecraft:block/cube_all",
    "textures": {
        "all": "minecraft:block/custom/palm_planks"
    }
}

minecraft:block/cube_column

{
    "parent": "minecraft:block/cube_column",
    "textures": {
        "end": "minecraft:block/custom/stripped_palm_log_top",
        "side": "minecraft:block/custom/stripped_palm_log"
    }
}

minecraft:block/cube_column_horizontal

{
    "parent": "minecraft:block/cube_column_horizontal",
    "textures": {
        "end": "minecraft:block/custom/palm_log",
        "side": "minecraft:block/custom/palm_log"
    }
}

minecraft:block/template_command_block

{
  "parent": "minecraft:block/template_command_block",
  "textures": {
    "back": "minecraft:block/chain_command_block_back",
    "front": "minecraft:block/chain_command_block_front",
    "side": "minecraft:block/chain_command_block_side"
  }
}

minecraft:block/cube_column_uv_locked_x

{
  "parent": "minecraft:block/cube_column_uv_locked_x",
  "textures": {
    "end": "minecraft:block/cherry_log_top",
    "side": "minecraft:block/cherry_log"
  }
}

minecraft:block/cube_column_uv_locked_y

{
  "parent": "minecraft:block/cube_column_uv_locked_y",
  "textures": {
    "end": "minecraft:block/cherry_log_top",
    "side": "minecraft:block/cherry_log"
  }
}

minecraft:block/cube_column_uv_locked_z

{
  "parent": "minecraft:block/cube_column_uv_locked_z",
  "textures": {
    "end": "minecraft:block/cherry_log_top",
    "side": "minecraft:block/cherry_log"
  }
}

minecraft:block/pressure_plate_up

{
  "parent": "minecraft:block/pressure_plate_up",
  "textures": {
    "texture": "minecraft:block/cherry_planks"
  }
}

minecraft:block/template_anvil

{
  "parent": "minecraft:block/template_anvil",
  "textures": {
    "top": "minecraft:block/chipped_anvil_top"
  }
}