- Qt 5.15
- Qt 3D
- QML Types
- PhongAlphaMaterial QML Type
- Qt 5.15.2 Reference Documentation

# PhongAlphaMaterial QML Type

The PhongAlphaMaterial class provides a default implementation of the phong lighting effect with alpha. More...

Import Statement: | import Qt3D.Extras 2.15
Since: | Qt 5.7

- List of all members, including inherited members

## Properties

- alpha : real
- ambient : color
- blendFunctionArg : BlendEquation::BlendFunction
- destinationAlphaArg : BlendEquationArguments::Blending
- destinationRgbArg : BlendEquationArguments::Blending
- diffuse : color
- shininess : real
- sourceAlphaArg : BlendEquationArguments::Blending
- sourceRgbArg : BlendEquationArguments::Blending
- specular : color

## Detailed Description

The phong lighting effect is based on the combination of 3 lighting components ambient, diffuse and specular. The relative strengths of these components are controlled by means of their reflectivity coefficients which are modelled as RGB triplets:

- Ambient is the color that is emitted by an object without any other light source.
- Diffuse is the color that is emitted for rought surface reflections with the lights.
- Specular is the color emitted for shiny surface reflections with the lights.
- The shininess of a surface is controlled by a float property.
- Alpha is the transparency of the surface between 0 (fully transparent) and 1 (opaque).

This material uses an effect with a single render pass approach and performs per fragment lighting. Techniques are provided for OpenGL 2, OpenGL 3 or above as well as OpenGL ES 2.

## Property Documentation

alpha : real

Holds the alpha component of the object which varies between 0 and 1.

The default value is 0.5.

ambient : color

Holds the current ambient color.

blendFunctionArg : BlendEquation::BlendFunction

Holds the blend equation function argument.

See also Qt3DRender::QBlendEquation::BlendFunction.

destinationAlphaArg : BlendEquationArguments::Blending

Holds the blend equation destination alpha blending argument.

See also Qt3DRender::QBlendEquationArguments::Blending.

destinationRgbArg : BlendEquationArguments::Blending

Holds the blend equation destination RGB blending argument.

See also Qt3DRender::QBlendEquationArguments::Blending.

diffuse : color

Holds the current diffuse color.

shininess : real

Holds the current shininess.

sourceAlphaArg : BlendEquationArguments::Blending

Holds the blend equation source alpha blending argument.

See also Qt3DRender::QBlendEquationArguments::Blending.

sourceRgbArg : BlendEquationArguments::Blending

Holds the blend equation source RGB blending argument.

See also Qt3DRender::QBlendEquationArguments::Blending.

specular : color

Holds the current specular color.