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Unity Engine

ShaderPrecisionModel

Options for the shader precision model.
Read time 1 minuteLast updated 5 days ago

Definition

  • Type: Enum
  • Namespace: UnityEditor
  • Assembly: UnityEditor
public enum ShaderPrecisionModel

Remarks

This enumeration allows you to change two things: the default sampler precision and the definition of 
half
.
The default sampler precision is only relevant to samplers that don't explicitly declare a precision. For example, 
sampler2D
uses the default precision, but 
sampler2D_float
uses full precision regardless of the default precision.
Regarding the shader type 
half
, it is defined as either 
float
or 
min16float
(see SL-DataTypesAndPrecision). For the purpose of uploading data to buffers, including constant buffers, the size and alignment is 4 bytes in both cases.

Fields

Value

Description

PlatformDefaultUse the target platform defaults. The default sampler precision is half precision on mobile targets and full precision elsewhere. Also, shader type 
half
is defined as 
min16float
on mobile targets and 
float
elsewhere.
UnifiedUse full sampler precision by default, and explicitly declare when you want to use lower precision. Refer to SL-DataTypesAndPrecision for more information. In addition, 
half
is defined as 
min16float
on all platforms. This sets BuiltinShaderDefine.UNITY_UNIFIED_SHADER_PRECISION_MODEL when Unity compiles shaders.