# lv_gltf_environment.h (/api/libs/gltf/gltf_environment/lv_gltf_environment_h)
Functions [#functions]
lv_gltf_ibl_sampler_set_cube_map_pixel_resolution [#lv_gltf_ibl_sampler_set_cube_map_pixel_resolution]
Set the resolution for each cubemap face
```c title=" " lineNumbers=1
void lv_gltf_ibl_sampler_set_cube_map_pixel_resolution(lv_gltf_ibl_sampler_t *sampler, uint32_t resolution)
```
Parameters
| Name | Type | Description |
| ------------ | -------------------------------------------------------------------------- | ------------------------------------------------------------------ |
| `sampler` | | |
| `resolution` | | of each cube map face in pixels (recommended: 64-512 for embedded) |
lv_gltf_environment_set_angle [#lv_gltf_environment_set_angle]
Set the rotation angle of the environment map
```c title=" " lineNumbers=1
void lv_gltf_environment_set_angle(lv_gltf_environment_t *env, float angle)
```
Parameters
| Name | Type | Description |
| ------- | -------------------------------------------------------------------------- | -------------------------- |
| `env` | | pointer to the environment |
| `angle` | `float` | rotation angle in degrees |
lv_gltf_ibl_sampler_create [#lv_gltf_ibl_sampler_create]
Create an IBL sampler for processing environment images
```c title=" " lineNumbers=1
lv_gltf_ibl_sampler_t * lv_gltf_ibl_sampler_create(void)
```
**Returns:** — pointer to the created sampler, or NULL on failure
Can be safely deleted after environments are created
lv_gltf_ibl_sampler_delete [#lv_gltf_ibl_sampler_delete]
Delete an IBL sampler
```c title=" " lineNumbers=1
void lv_gltf_ibl_sampler_delete(lv_gltf_ibl_sampler_t *sampler)
```
Parameters
| Name | Type | Description |
| --------- | -------------------------------------------------------------------------- | -------------------------------- |
| `sampler` | | pointer to the sampler to delete |
lv_gltf_environment_create [#lv_gltf_environment_create]
Create an environment from an HDR or JPEG panoramic image for IBL rendering
```c title=" " lineNumbers=1
lv_gltf_environment_t * lv_gltf_environment_create(lv_gltf_ibl_sampler_t *sampler, const char *file_path)
```
Parameters
| Name | Type | Description |
| ----------- | -------------------------------------------------------------------------- | -------------------------------------------------------------------------------- |
| `sampler` | | IBL sampler defining output resolution (can be deleted after this call) |
| `file_path` | `const char *` | path to equirectangular environment image, or NULL to use default embedded image |
**Returns:** — pointer to the created environment, or NULL on failure
The source image will be downsampled to the sampler's texture\_size
The environment can be shared across multiple glTF objects
lv_gltf_environment_delete [#lv_gltf_environment_delete]
Delete an environment
```c title=" " lineNumbers=1
void lv_gltf_environment_delete(lv_gltf_environment_t *environment)
```
Parameters
| Name | Type | Description |
| ------------- | -------------------------------------------------------------------------- | ------------------------------------ |
| `environment` | | pointer to the environment to delete |
Macros [#macros]
LV_GLTF_DEFAULT_CUBE_MAP_RESOLUTION [#lv_gltf_default_cube_map_resolution]
```c title=" " lineNumbers=1
#define LV_GLTF_DEFAULT_CUBE_MAP_RESOLUTION 128
```
Dependencies [#dependencies]