Engine API Reference - v1.77.0
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    Class BasicMaterial

    A BasicMaterial is for rendering unlit geometry, either using a constant color or a color map modulated with a color.

    // Create a new Basic material
    const material = new pc.BasicMaterial();

    // Set the material to have a texture map that is multiplied by a red color
    material.color.set(1, 0, 0);
    material.colorMap = diffuseMap;

    // Notify the material that it has been modified
    material.update();

    Hierarchy (View Summary)

    Index

    Properties

    alphaTest alphaToCoverage color colorMap cull name stencilBack stencilFront userId

    Accessors

    alphaWrite blendState blendType blueWrite depthBias depthFunc depthState depthTest depthWrite greenWrite redWrite shader slopeDepthBias

    Methods

    clone copy deleteParameter destroy getParameter setParameter update

    Properties

    alphaTest: number = 0

    The alpha test reference value to control which fragments are written to the currently active render target based on alpha value. All fragments with an alpha value of less than the alphaTest reference value will be discarded. alphaTest defaults to 0 (all fragments pass).

    alphaToCoverage: boolean = false

    Enables or disables alpha to coverage (WebGL2 only). When enabled, and if hardware anti-aliasing is on, limited order-independent transparency can be achieved. Quality depends on the number of MSAA samples of the current render target. It can nicely soften edges of otherwise sharp alpha cutouts, but isn't recommended for large area semi-transparent surfaces. Note, that you don't need to enable blending to make alpha to coverage work. It will work without it, just like alphaTest.

    color: Color = ...

    The flat color of the material (RGBA, where each component is 0 to 1).

    colorMap: null | Texture = null

    The color map of the material (default is null). If specified, the color map is modulated by the color property.

    cull: number = CULLFACE_BACK

    Controls how triangles are culled based on their face direction with respect to the viewpoint. Can be:

    • CULLFACE_NONE: Do not cull triangles based on face direction.
    • CULLFACE_BACK: Cull the back faces of triangles (do not render triangles facing away from the view point).
    • CULLFACE_FRONT: Cull the front faces of triangles (do not render triangles facing towards the view point).

    Defaults to CULLFACE_BACK.

    name: string = 'Untitled'

    The name of the material.

    stencilBack: null | StencilParameters = null

    Stencil parameters for back faces (default is null).

    stencilFront: null | StencilParameters = null

    Stencil parameters for front faces (default is null).

    userId: string = ''

    A unique id the user can assign to the material. The engine internally does not use this for anything, and the user can assign a value to this id for any purpose they like. Defaults to an empty string.

    Accessors

    • get alphaWrite(): boolean

      Gets whether the alpha channel is written to the color buffer.

      Returns boolean

    • set alphaWrite(value: boolean): void

      Sets whether the alpha channel is written to the color buffer. If true, the red component of fragments generated by the shader of this material is written to the color buffer of the currently active render target. If false, the alpha component will not be written. Defaults to true.

      Parameters

      • value: boolean

      Returns void

    • get blendType(): number

      Gets the blend mode for this material.

      Returns number

    • set blendType(type: number): void

      Sets the blend mode for this material. Controls how fragment shader outputs are blended when being written to the currently active render target. Can be:

      Defaults to BLEND_NONE.

      Parameters

      • type: number

      Returns void

    • get blueWrite(): boolean

      Gets whether the blue channel is written to the color buffer.

      Returns boolean

    • set blueWrite(value: boolean): void

      Sets whether the blue channel is written to the color buffer. If true, the red component of fragments generated by the shader of this material is written to the color buffer of the currently active render target. If false, the blue component will not be written. Defaults to true.

      Parameters

      • value: boolean

      Returns void

    • get depthBias(): number

      Gets the offset for the output depth buffer value.

      Returns number

    • set depthBias(value: number): void

      Sets the offset for the output depth buffer value. Useful for decals to prevent z-fighting. Typically a small negative value (-0.1) is used to render the mesh slightly closer to the camera.

      Parameters

      • value: number

      Returns void

    • get depthTest(): boolean

      Gets whether depth testing is enabled.

      Returns boolean

    • set depthTest(value: boolean): void

      Sets whether depth testing is enabled. If true, fragments generated by the shader of this material are only written to the current render target if they pass the depth test. If false, fragments generated by the shader of this material are written to the current render target regardless of what is in the depth buffer. Defaults to true.

      Parameters

      • value: boolean

      Returns void

    • get depthWrite(): boolean

      Gets whether depth writing is enabled.

      Returns boolean

    • set depthWrite(value: boolean): void

      Sets whether depth writing is enabled. If true, fragments generated by the shader of this material write a depth value to the depth buffer of the currently active render target. If false, no depth value is written. Defaults to true.

      Parameters

      • value: boolean

      Returns void

    • get greenWrite(): boolean

      Gets whether the green channel is written to the color buffer.

      Returns boolean

    • set greenWrite(value: boolean): void

      Sets whether the green channel is written to the color buffer. If true, the red component of fragments generated by the shader of this material is written to the color buffer of the currently active render target. If false, the green component will not be written. Defaults to true.

      Parameters

      • value: boolean

      Returns void

    • get redWrite(): boolean

      Gets whether the red channel is written to the color buffer.

      Returns boolean

    • set redWrite(value: boolean): void

      Sets whether the red channel is written to the color buffer. If true, the red component of fragments generated by the shader of this material is written to the color buffer of the currently active render target. If false, the red component will not be written. Defaults to true.

      Parameters

      • value: boolean

      Returns void

    • get slopeDepthBias(): number

      Gets the offset for the output depth buffer value based on the slope of the triangle relative to the camera.

      Returns number

    • set slopeDepthBias(value: number): void

      Sets the offset for the output depth buffer value based on the slope of the triangle relative to the camera.

      Parameters

      • value: number

      Returns void

    Methods

    • Retrieves the specified shader parameter from a material.

      Parameters

      • name: string

        The name of the parameter to query.

      Returns any

      The named parameter.

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