Options
Options are not adjustable but fixed options of the material. They are used to set custom values for common material options. The type of ULON node is Option.
The syntax is the following:
Option option_name = value(s)Preprocessor Auto Generation for Shaders#
You can access options in the shader using the following defines:
- GET_OPTION_<option name in uppercase> — available for all types of options.
| Option name | Option’s define | Possible values |
|---|---|---|
| Transparent | GET_OPTION_TRANSPARENT |
0 — opaque (default) 1 — alpha test 2 — blend 3 — water |
| Order | GET_OPTION_ORDER |
-128..127 0 — default order |
| Depth mask | GET_OPTION_DEPTH_MASK | 0 or 1 |
| Depth test | GET_OPTION_DEPTH_TEST | 0 or 1 |
| Two sided | GET_OPTION_TWO_SIDED | 0 or 1 |
| Cast shadow | GET_OPTION_CAST_PROJ_OMNI_SHADOW | 0 or 1 |
| Cast world shadow | GET_OPTION_CAST_WORLD_SHADOW | 0 or 1 |
| Overlap | GET_OPTION_OVERLAP | 0 or 1 |
- OPTION_<option name in uppercase> — defined only if an option has a positive value.
| Option name | Option’s define | Additional define(s) |
|---|---|---|
| Transparent | OPTION_TRANSPARENT |
0 — OPAQUE 1 — ALPHA_TEST 2 — TRANSPARENT_BLEND 3 — TRANSPARENT_WATER |
| Order | OPTION_ORDER | — |
| Depth mask | OPTION_DEPTH_MASK | — |
| Depth test | OPTION_DEPTH_TEST | — |
| Two sided | OPTION_TWO_SIDED | 1 — TWO_SIDED |
| Cast shadow | OPTION_CAST_PROJ_OMNI_SHADOW | — |
| Cast world shadow | OPTION_CAST_WORLD_SHADOW | — |
| Overlap | OPTION_OVERLAP | 1 — OVERLAP_RENDER |
For various blend modes the source and destination defines are generated:
BLEND_SRC_FUNC_<source blend option name in uppercase>
BLEND_DEST_FUNC_<destination blend option name in uppercase>
// Examples
BLEND_SRC_FUNC_SRC_ALPHA
BLEND_DEST_FUNC_ONE_MINUS_SRC_ALPHAUsage Examples#
BaseMaterial
{
Option depth_test = false
Option transparent = 2
Option blend_src = src_alpha
Option blend_dest = one_minus_src_alpha
}Types of Options#
blend_src#
String
A node that allows you to set a blending option value (only for transparent objects and decals). It is a source image representing polygon color.
Available values:
- zero — RGBA components of the source/destination image color are multiplied by zero.
- one — RGBA components of the source/destination image color are multiplied by one.
- src_color — RGBA components of the source/destination image color are multiplied by the mR, mG, mB, mA components (per component).
- one_minus_src_color — RGBA components of the source/destination image color are multiplied by the 1 - mR, 1 - mG, 1 - mB, 1 - mA components (per component).
- src_alpha — RGBA components of the source/destination image color are multiplied by the mA component.
- one_minus_src_alpha — RGBA components of the source/destination image color are multiplied by the 1 - mA component.
- dest_color — RGBA components of the source/destination image color are multiplied by the bR, bG, bB, bA components (per component).
- one_minus_dest_color — RGBA components of the source/destination image color are multiplied by the 1 - bR, 1 - bG, 1 - bB, 1 - bA components (per component).
- dest_alpha — RGBA components of the source/destination image color are multiplied by the bA component.
- one_minus_dest_alpha — RGBA components of the source/destination image color are multiplied by the 1 - bA component.
mR, mG, mB, mA are normalized Red, Blue, Green and Alpha material image channels;
bR, bG, bB, bA are normalized Red, Blue, Green and Alpha background image channels.
blend_dest#
String
A node that allows you to set a blending option value (only for transparent objects and decals). It is a destination image representing screen buffer color.
Available values:
- zero — RGBA components of the source/destination image color are multiplied by zero.
- one — RGBA components of the source/destination image color are multiplied by one.
- src_color — RGBA components of the source/destination image color are multiplied by the mR, mG, mB, mA components (per component).
- one_minus_src_color — RGBA components of the source/destination image color are multiplied by the 1 - mR, 1 - mG, 1 - mB, 1 - mA components (per component).
- src_alpha — RGBA components of the source/destination image color are multiplied by the mA component.
- one_minus_src_alpha — RGBA components of the source/destination image color are multiplied by the 1 - mA component.
- dest_color — RGBA components of the source/destination image color are multiplied by the bR, bG, bB, bA components (per component).
- one_minus_dest_color — RGBA components of the source/destination image color are multiplied by the 1 - bR, 1 - bG, 1 - bB, 1 - bA components (per component).
- dest_alpha — RGBA components of the source/destination image color are multiplied by the bA component.
- one_minus_dest_alpha — RGBA components of the source/destination image color are multiplied by the 1 - bA component.
mR, mG, mB, mA are normalized Red, Blue, Green and Alpha material image channels;
bR, bG, bB, bA are normalized Red, Blue, Green and Alpha background image channels.
order#
Char
Rendering order of the material. Specifies the priority of the material rendering (only for Object and Decal).
Available values:
- -128 .. 127. The default value is 0. The higher the rendering order, the lower the rendering priority (the material with the -128 order will be rendered first).
shadow_mask#
Integer
A shadow mask used to control shadows cast by an object lit by light sources (only for Object and Decal).
Available values:
- Integer number, representing a mask. The default value is ~0.
viewport_mask#
Integer
A viewport mask (only for Object and Decal).
Available values:
- Integer number, representing a mask. The default value is ~0.
depth_mask#
Boolean
A flag indicating if writing in the depth buffer is enabled for a material (only for Object).
Available values:
- false — not used
- true — used (by default)
depth_test#
Boolean
A flag indicating if the Depth Test option is enabled for a material (only for Object).
Available values:
- false — disabled
- true — enabled (by default)
two_sided#
Boolean
A flag indicating if the Two Sided option is enabled for a material (only for Object).
Available values:
- false — disabled (by default)
- true — enabled
cast_shadow#
Boolean
A flag indicating if the Cast Proj and Omni Shadow option is enabled for a material (only for Object).
Available values:
- false — disabled
- true — enabled (by default)
cast_world_shadow#
Boolean
A flag indicating if the Cast World shadow option is enabled for a material (only for Object).
Available values:
- false — disabled
- true — enabled (by default)
transparent#
Indicates how and when an object with this material will be rendered (only for Object). A lower value gives a higher priority in the rendering queue.
Available values:
Integer
- 0 = TRANSPARENT_NONE — opaque geometry that renders in deferred pass into GBuffer
- 1 = TRANSPARENT_ALPHA_TEST — opaque geometry with enabled alpha test that renders in the deferred pass into GBuffer
- 2 = TRANSPARENT_BLEND — transparent geometry that renders in forward passes
- 3 = TRANSPARENT_WATER — water objects that renders in the deferred pass
or a String
- none = TRANSPARENT_NONE
- alpha_test = TRANSPARENT_ALPHA_TEST
- blend = TRANSPARENT_BLEND
- water = TRANSPARENT_WATER