HDR files

In this section you will get to know how to use and store HDR files.

Agenda:

HDR - Environmental mapping files with wide bit range

HDR - Environmental mapping files with wide bit range.

In SkyRenderer one can use HDR as in every other rendering engine, but you have to organize them in a proper
way. HDR files are stored in 'background_hdrs' subdirectory. You may access full path using renderer context's
get_abs_path functionality

renderer_context.get_abs_path("", AssetsTypes.BACKGROUND_HDRS)

Inside a directory there are always at least two files: HDR and .json config. In some cases, when there is
a batch used, there would be n json-hdr file pairs accompanied by additional, proxy json in which there is a
mapping of mentioned n* json-hdr pairs.

You can learn more about parametrizing HDRs in HDRTextureProvider tutorial.

    import json
    from pathlib import Path
    from skyrenderer.cases.utils import MaterialsSceneComposer
    from skyrenderer.core.asset_manager.asset_manager import AssetsTypes

    scene_composer = MaterialsSceneComposer(antialiasing_level=32)
    hdr_directory = scene_composer.renderer_context.get_abs_path("", AssetsTypes.BACKGROUND_HDRS)
    scene_composer.log_info(hdr_directory)
    pink_sunrise_dir = scene_composer.renderer_context.get_abs_path("pink_sunrise", AssetsTypes.BACKGROUND_HDRS)
    for entry in pink_sunrise_dir.iterdir():
        scene_composer.log_info(entry.name)
    with open(pink_sunrise_dir.joinpath("pink_sunrise.json"), "r") as file:
        config_content = json.load(file)
    scene_composer.log_info("Single HDR:")
    scene_composer.log_info(config_content)
    batch_hdr_dir = scene_composer.renderer_context.get_abs_path("batch_hdr", AssetsTypes.BACKGROUND_HDRS)
    with open(Path(batch_hdr_dir).joinpath("batch_hdr.json"), "r") as file:
        config_content = json.load(file)
    scene_composer.log_info("Batch HDR:")
    scene_composer.log_info(config_content)

2025-01-29 13:51:17,697 | skyrenderer.scene.renderer_context |  INFO: Root paths:
- root path: /dli/skyenvironment/skyrenderer/skyrenderer
- assets path: /dli/mount/assets
- config path: /dli/skyenvironment/skyrenderer/skyrenderer/config
- gpu sources path: /dli/skyenvironment/skyrenderer/skyrenderer/optix_sources/sources
- cache path: /dli/mount/cache
- ptx cache path: compiled_ptx/ptx
- ocio path: ocio_configs/aces_1.2/config.ocio

2025-01-29 13:51:17,727 | skyrenderer |  INFO: /dli/mount/assets/renderer/background_hdrs

2025-01-29 13:51:17,728 | skyrenderer |  INFO: pink_sunrise_8k.hdr

2025-01-29 13:51:17,729 | skyrenderer |  INFO: pink_sunrise.json

2025-01-29 13:51:17,731 | skyrenderer |  INFO: Single HDR:

2025-01-29 13:51:17,732 | skyrenderer |  INFO: {'map_path': 'pink_sunrise_8k.hdr', 'parameters': {'gamma': 1.5, 'intensity': 3}}

2025-01-29 13:51:17,733 | skyrenderer |  INFO: Batch HDR:

2025-01-29 13:51:17,733 | skyrenderer |  INFO: {'map_path': '{}', 'config_proxy': ['blaubeuren_church_square_8k.json', 'leadenhall_market_8k.json', 'flower_road_4k.json'], 'internal_lights_count': 10}

Summary

In this section you have learnt:

HDR files are stored in 'background_hdrs' subdirectory.
In HDR's directories HDR files are accompanied by .json files.

HDR files

HDR - Environmental mapping files with wide bit range.

Summary

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