Class PMREMGenerator

This class generates a Prefiltered, Mipmapped Radiance Environment Map (PMREM) from a cubeMap environment texture.

Remarks

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.

See

Constructors

constructor

Methods

compileCubemapShader compileEquirectangularShader dispose fromCubemap fromEquirectangular fromScene

Constructors

constructor

  • new PMREMGenerator(renderer): PMREMGenerator

  • This constructor creates a new PMREMGenerator.

    Parameters

    Returns PMREMGenerator

Methods

compileCubemapShader

  • compileCubemapShader(): void

  • Pre-compiles the cubemap shader

    Returns void

    Remarks

    You can get faster start-up by invoking this method during your texture's network fetch for increased concurrency.

compileEquirectangularShader

  • compileEquirectangularShader(): void

  • Pre-compiles the equirectangular shader

    Returns void

    Remarks

    You can get faster start-up by invoking this method during your texture's network fetch for increased concurrency.

dispose

  • dispose(): void

  • Frees the GPU-related resources allocated by this instance

    Returns void

    Remarks

    Call this method whenever this instance is no longer used in your app.

fromCubemap

fromEquirectangular

fromScene

  • fromScene(scene, sigma?, near?, far?): WebGLRenderTarget<Texture>

  • Generates a PMREM from a supplied Scene, which can be faster than using an image if networking bandwidth is low

    Parameters

    • scene: Scene

      The given scene.

    • Optionalsigma: number

      Specifies a blur radius in radians to be applied to the scene before PMREM generation. Default 0.

    • Optionalnear: number

      The near plane value. Default 0.1.

    • Optionalfar: number

      The far plane value. Default 100.

    Returns WebGLRenderTarget<Texture>

    Remarks

    Optional near and far planes ensure the scene is rendered in its entirety (the cubeCamera is placed at the origin).

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