reflect
Returns a reflection vector using an incident ray and a surface normal.
| ret reflect(i, n) |
|---|
Parameters
| Item | Description |
|---|---|
| i |
[in] A floating-point, incident vector. |
| n |
[in] A floating-point, normal vector. |
Return Value
A floating-point, reflection vector.
Remarks
This function calculates the reflection vector using the following formula: v = i - 2 * n * dot(i n) .
Type Description
| Name | Template Type | Component Type | Size |
|---|---|---|---|
| i | vector | float | any |
| n | vector | float | same dimension(s) as input i |
| ret | vector | float | same dimension(s) as input i |
Minimum Shader Model
This function is supported in the following shader models.
| Shader Model | Supported |
|---|---|
| Shader Model 1 (DirectX HLSL) and higher shader models | yes |