This class generates a Prefiltered, Mipmapped Radiance Environment Map (PMREM) from a cubeMap environment texture.
This allows different levels of blur to be quickly accessed based on material roughness.
Unlike a traditional mipmap chain, it only goes down to the LOD_MIN level (above), and then creates extra even more
filtered 'mips' at the same LOD_MIN resolution, associated with higher roughness levels. In this way we maintain
resolution to smoothly interpolate diffuse lighting while limiting sampling computation.
// Verge3D: TODO
This constructor creates a new PMREMGenerator.
scene - The given scene.
sigma - (optional) Specifies a blur radius in radians to be applied to the scene before PMREM generation. Default is
near - (optional) The near plane value. Default is
far - (optional) The far plane value. Default is
Generates a PMREM from a supplied Scene, which can be faster than using an image if networking bandwidth is low. Optional near and far planes ensure the scene is rendered in its entirety (the cubeCamera is placed at the origin).
equirectangular - The equirectangular texture.
Generates a PMREM from an equirectangular texture.
cubemap - The cubemap texture.
Generates a PMREM from an cubemap texture.
Pre-compiles the cubemap shader. You can get faster start-up by invoking this method during your texture's network fetch for increased concurrency.
Pre-compiles the equirectangular shader. You can get faster start-up by invoking this method during your texture's network fetch for increased concurrency.
Frees the GPU-related resources allocated by this instance. Call this method whenever this instance is no longer used in your app.
For more info on how to obtain the source code of this module see this page.