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There are two overloaded tex3D volume texture lookup functions:
This function performs a 3D volume texture lookup.
| ret tex3D(s, t) |
|---|
Where:
| Name | In/Out | Template Type | Component Type | Size |
|---|---|---|---|---|
| s | in | object | sampler3D | 3 |
| t | in | vector | float | 3 |
| ret | out | vector | float | 4 |
This intrinsic function is supported in the following (or above) shader versions:
| Vertex Shader | Pixel Shader |
|---|---|
| n/a | ps_1_1 |
This function performas a 3D volume texture lookup also, but also uses the partial derivatives to help pick the LOD.
| ret tex3D(s, t, ddx, ddy) |
|---|
Where:
| Name | In/Out | Template Type | Component Type | Size |
|---|---|---|---|---|
| s | in | object | sampler3D | 1 |
| t | in | vector | float | 3 |
| ddx | in | vector | float | 3 |
| ddy | in | vector | float | 3 |
| ret | out | vector | float | 4 |
This intrinsic function is supported in the following (or above) shader versions:
| Vertex Shader | Pixel Shader |
|---|---|
| n/a | ps_2_0 |