VoxelEngine/doc/en/block-properties.md

Block properties

Visual

texture

Block texture name (name of the file in textures/blocks/ with no path and extension included, just name)

Texture file must be a png image

texture-faces

Important

Can't be used if texture already specified

An array of 6 texture names for block sides.

Example:

"texture-faces": [
    "grass_side",
    "grass_side",
    "dirt",
    "grass_top",
    "grass_side",
    "grass_side"
]

model

Block model type from list:

• "block" - default block model
• "none" - invisible block (air)
• "X" - grass model (two crossed sprites)
• "aabb" - model based of block hitbox (complex hitbox will be combined into one). Examples: pipes, bulbs, panels.

draw-group

Integer specifying number of block draw group (render order). Used for semi-transparent blocks.

translucent

Enables translucency support in block textures (examples: water, ice). Should only be used when needed, as it impacts performance. Not required for full transparency (grass, flowers).

rotation

Rotation profile (set of available block rotations and behaviour of placing block rotation) from list:

• "none" - no rotation available (default profile)
• "pipe" - wood logs, pipes, pillars
• "pane" - panels, doors, signs

Lighting

emission

An array of 3 integers - R, G, B of light in range [0, 15]

Examples:

• [15, 15, 15] - white with maximal intensity
• [7, 0, 0] - dim red light
• [0, 0, 0] - no emission (default value)

light-passing

Light ignores block if true

sky-light-passing

Vertical sky light ray ignores block if true. (used for water)

shadeless

Turns off block model shading

ambient-occlusion (Vertex-based Ambient-Occlusion)

Determines the presence of the vertex AO effect. Turned-on by default.

Physics

obstacle

Block is not a physical obstacle if false

hitbox

An array of 6 numbers describing an offset an size of a block hitbox.

Array [0.25, 0.0, 0.5, 0.75, 0.4, 0.3] describes hitbox width:

• offset 0.25m east
• offset 0.0m up
• offset 0.5m north
• 0.75m width (from east to west)
• 0.4m height
• 0.3m length (from south to north)

grounded

Is block may only be set on a solid block and destructs on below block destruction.

selectable

Cursor ray will ignore block if false.

replaceable

Is block replaceable. Examples: air, water, grass, flower.

breakable

Is block breakable by mouse click.

Inventory

hidden

If true an item will not be generated for block. picking-item must be specified

picking-item

Item will be chosen on MMB click on the block.

Example: block door:door_open is hidden, so you need to specify picking-item: "door:door.item" to bind it to not hidden door:door block item.

script-name

Used to specify block script name (to reuse one script to multiple blocks). Name must not contain packid:scripts/ and extension. Just name.

ui-layout

Block UI XML layout name. Default: string block id.

Examples for block containermod:container:

• default: containermod:container (containermod/layouts/container.xml)
• if containermod:randombox specified: (containermod/layouts/randombox.xml)

inventory-size

Number of block inventory slots. Default - 0 (no inventory).

Extended blocks

size

Array of three integers. Default value is [1, 1, 1].

Block fields

Block fields allow you to write more data unique to a specified voxel than the user bits allow.

Block fields are declared in the following format:

"fields": {
    "name": {"type": "data_type"},
    "array_name": {"type": "data_type", "length": "array_length"}
}

In addition to type and length, the convert-strategy parameter determines the value conversion strategy when narrowing the data type.

The parameter takes one of two values:

• reset - a value that does not exists in the new range will be reset to 0
• clamp - the value will be reduced to the closest one in the new range

Example: the number 231 when changing the field type from int16 to int8:

• in reset mode will turn into 0
• in clamp mode will turn into 127

Available data types:

Type	Size	Description
int8	1 byte	signed integer 8 bits
int16	2 bytes	signed integer 16 bits
int32	4 bytes	signed integer 32 bits
int64	8 bytes	integer signed 64 bits
float32	4 bytes	floating-point 32 bits
float64	8 bytes	floating-point 64 bits
char	1 byte	character

• Currently, the total sum of the field sizes cannot exceed 240 bytes.
• A field without an array length specification is equivalent to an array of 1 element.
• A character array can be used to store UTF-8 strings.