update docs structure

doc/en/3.Block-properties.md → doc/en/block-properties.md

@@ -1,4 +1,5 @@
 # Block properties
+
 ## Visual
 
 ### *texture*
@@ -128,3 +129,8 @@ Examples for block `containermod:container`:
 
 Number of block inventory slots. Default - 0 (no inventory).
 
+## Extended blocks
+
+### *size*
+
+Array of three integers. Default value is `[1, 1, 1]`.

doc/en/console.md

@@ -0,0 +1,109 @@
+# Console
+
+To work with the command interpreter, use the **console** library.
+
+## Commands creation
+
+To create a console command, use the following function:
+
+```python
+console.add_command(scheme: str, executor: function)
+```
+
+Scheme has the following syntax:
+
+```
+name positional arguments {keyword arguments}
+```
+
+Name may contain:
+- latin letters
+- digits (except the first character)
+- `.`, `_`, `-`
+
+Positional arguments are separated by spaces and have the following syntax:
+
+```
+name:type                        (option 1)
+name:type=default                (option 2)
+name:type~origin                 (option 3)
+name:type=default~origin         (option 4)
+```
+
+Available types:
+- **int** - integer
+- **num** - floating-point number
+- **str** - string
+- **sel** - selector (object id represented by an integer)
+- **enum** - enumeration
+
+Options 3 and 4 show the `~` operator that allows you to use relative values. *Origin* - the value relative to which the user will be specified. For example, the player's position.
+
+The relative operator only works with numbers (num or int)
+
+Variables assigned via **console.set** can be specified as origin values.
+
+Example:
+
+```python
+x:num~pos.x
+```
+
+Variables may be specified as default values ​​using the `$` prefix:
+
+```python
+t:int=$time
+```
+
+Enumerations are declared the following way:
+
+```python
+mode:[replace|destruct|none]
+```
+
+Or with a variable:
+
+```python
+mode:enum $modes
+```
+
+Selectors are specified with the `@` prefix. At the moment they are unused due to the lack of an object model. Should be made optional and use variables:
+
+```python
+obj:sel=$obj.id # obj.id - player id
+```
+
+Keyword arguments are specified in a special block, delimited by curly braces `{ }`, following the same pattern as positional arguments.
+
+Example:
+
+```python
+eval name:str="World" {greeting:str='Hello'}
+```
+
+## Command scheme examples
+
+Schemes of standard commands can be found in the file `res/script/stdcmd.lua`.
+
+Example - command **tp**:
+
+```python
+tp obj:sel=$obj.id x:num~pos.x y:num~pos.y z:num~pos.z
+```
+
+Full lua code of the command creation:
+
+```lua
+console.add_command(
+    "tp obj:sel=$obj.id x:num~pos.x y:num~pos.y z:num~pos.z",
+    "Teleport object",
+    function (args, kwargs)
+        player.set_pos(unpack(args))
+    end
+)
+```
+
+- Checked values ​​of positional arguments are passed to **args**.
+- A table of keyword argument values ​​is passed to **kwargs**.
+
+The command interpreter performs type checking and casting automatically.

doc/en/main-page.md

@@ -0,0 +1,14 @@
+# Documentation
+
+## Sections
+
+- [Engine usage recommendations](engine-use-recommendations.md)
+- [Content-packs](content-packs.md)
+- [Block properties](block-properties.md)
+- [Item properties](item-properties.md)
+- [XML UI building](xml-ui-layouts.md)
+- [Assets preloading](assets-preload.md)
+- [Audio](audio.md)
+- [Scripting](scripting.md)
+- [Console](console.md)
+- [Block models](block-models.md)