Defines a Material generated depending on which properties are set. 更多...
| import 语句： | import QtQuick3D 1.15 |
| 继承： |
Before a Model can be rendered in a scene, it must have at least one material to define how the mesh is shaded. The DefaultMaterial is the easiest way to define such a material. Even if you define a DefaultMaterial with no properties set, a valid mesh will be rendered, because the mesh defines some sensible defaults.
As you change the properties of the DefaultMaterial, behind the scenes new shaders are generated, and the property values are bound. The complexity of a shader depends on a combination of the properties that are set on it, and the context of the scene itself.
|
blendMode : enumeration |
This property determines how the colors of the model rendered blend with those behind it.
| 常量 | 描述 |
|---|---|
DefaultMaterial.SourceOver
|
Default blend mode. Opaque objects occlude objects behind them. |
DefaultMaterial.Screen
|
Colors are blended using an inverted multiply, producing a lighter result. This blend mode is order-independent; if you are using semi-opaque objects and experiencing popping as faces or models sort differently, using Screen blending is one way to produce results without popping. |
DefaultMaterial.Multiply
|
Colors are blended using a multiply, producing a darker result. This blend mode is also order-independent. |
DefaultMaterial.Overlay
|
A mix of Multiply and Screen modes, producing a result with higher contrast. |
DefaultMaterial.ColorBurn
|
Colors are blended by inverted division where the result also is inverted, producing a darker result. Darker than Multiply. |
DefaultMaterial.ColorDodge
|
Colors are blended by inverted division, producing a lighter result. Lighter than Screen. |
|
bumpAmount : real |
This property controls the amount of simulated displacement for the
bumpMap
or
normalMap
。默认值为
0
disabling the bump effect. The range is [0, 1].
|
bumpMap : Texture |
This property defines a grayscale Texture to simulate fine geometry displacement across the surface of the material. Brighter pixels indicate raised regions. The amount of the effect is controlled by the bumpAmount 特性。
注意： bump maps will not affect the silhouette of a model. Use a displacementMap if this is required.
|
diffuseColor : color |
This property determines the base color for the material. Set to black to create a purely-specular material (e.g. metals or mirrors).
|
diffuseLightWrap : real |
This property determines the amount of light wrap for the translucency map. A value of 0 will not wrap the light at all, while a value of 1 will wrap the light all around the object.
|
diffuseMap : Texture |
This property defines a Texture to apply to the material. Using Texture with transparency will also apply the alpha channel as an opacity map.
|
emissiveColor : color |
This property determines the color of self-illumination for this material.
|
emissiveFactor : real |
This property determines the amount of self-illumination from the material. In a scene with black ambient lighting, a material with an emissive factor of 0 will appear black wherever the light does not shine on it. Turning the emissive factor to 1 will cause the material to appear in its diffuse color instead.
注意： When you want a material to not be affected by lighting, instead of using 100% emissiveFactor consider setting the lightingMode to /c DefaultMaterial .NoLighting for a performance benefit.
|
emissiveMap : Texture |
This property sets a Texture to be used to set the emissive factor for different parts of the material. Using a grayscale image will not affect the color of the result, while using a color image will produce glowing regions with the color affected by the emissive map.
|
fresnelPower : real |
This property decreases head-on reflections (looking directly at the surface) while maintaining reflections seen at grazing angles. The default value is
0
disabling the fresnel effect.
|
indexOfRefraction : real |
This property controls what angles of reflections are affected by the
fresnelPower
。默认为
1.45
. The value must be greater or equal to
1.0
.
注意：
No known material in the world have ior much greater than
3.0
.
|
lighting : enumeration |
This property defines which lighting method is used when generating this material.
默认值为
DefaultMaterial.FragmentLighting
当使用
DefaultMaterial.FragmentLighting
, diffuse and specular lighting are calculated for each rendered pixel. Certain effects (such as a Fresnel or bump map) require
DefaultMaterial.FragmentLighting
to work.
当使用
DefaultMaterial.NoLighting
no lighting is calculated. This mode is (predictably) very fast, and quite effective when image maps are used that do not need to be shaded by lighting.
| 常量 | 描述 |
|---|---|
DefaultMaterial.NoLighting
|
No lighting is calculated. |
DefaultMaterial.FragmentLighting
|
Per-fragment lighting is calculated. |
|
normalMap : Texture |
This property defines a RGB image used to simulate fine geometry displacement across the surface of the material. The RGB channels indicate XYZ normal deviations. The amount of the effect is controlled by the bumpAmount 特性。
注意： Normal maps will not affect the silhouette of a model. Use a displacementMap if this is required.
|
opacity : real |
This property drops the opacity of just this material, separate from the model. The default is
1.0
. The range is [0.0, 1.0].
|
opacityChannel : enumeration |
This property defines the texture channel used to read the opacity value from
opacityMap
。默认值为
Material.A
.
| 常量 | 描述 |
|---|---|
Material.R
|
Read value from texture R channel. |
Material.G
|
Read value from texture G channel. |
Material.B
|
Read value from texture B channel. |
Material.A
|
Read value from texture A channel. |
|
opacityMap : Texture |
This property defines a Texture used to control the opacity differently for different parts of the material.
|
roughnessChannel : enumeration |
This property defines the texture channel used to read the roughness value from
roughnessMap
。默认值为
Material.R
.
| 常量 | 描述 |
|---|---|
Material.R
|
Read value from texture R channel. |
Material.G
|
Read value from texture G channel. |
Material.B
|
Read value from texture B channel. |
Material.A
|
Read value from texture A channel. |
|
roughnessMap : Texture |
This property defines a Texture to control the specular roughness of the material. If the texture contains multiple channels(RGBA), then the correct channel can be set using the roughnessChannel 特性。
|
specularAmount : real |
This property controls the strength of specularity (highlights and reflections). The default value is
0
disabling the specularity. The range is [0.0, 1.0].
注意： This property does not affect the specularReflectionMap , but does affect the amount of reflections from a scene's SceneEnvironment::lightProbe .
注意：
Unless your mesh is high resolution, you may need to use
DefaultMaterial.FragmentLighting
to get good specular highlights from scene lights.
|
specularMap : Texture |
This property defines a RGB Texture to modulate the amount and the color of specularity across the surface of the material. These values are multiplied by the specularAmount .
|
specularModel : enumeration |
This property determines which functions are used to calculate specular highlights for lights in the scene.
| 常量 | 描述 |
|---|---|
DefaultMaterial.Default
|
Specular lighting uses default lighting model. |
DefaultMaterial.KGGX
|
Specular lighting uses GGX lighting model. |
DefaultMaterial.KWard
|
Specular lighting uses Ward lighting model. |
|
specularReflectionMap : Texture |
This property sets a Texture used for specular highlights on the material. By default the Texture is applied using environmental mapping (not UV mapping): as you rotate the model the map will appear as though it is reflecting from the environment. Specular Reflection maps are an easy way to add a high-quality look with relatively low cost.
注意： Using a Light Probe in your SceneEnvironment for image-based lighting will automatically use that image as the specular reflection.
注意： Crisp images cause your material to look very glossy. The more you blur your image, the softer your material will appear.
|
specularRoughness : real |
This property controls the size of the specular highlight generated from lights, and the clarity of reflections in general. Larger values increase the roughness, softening specular highlights and blurring reflections.
|
specularTint : real |
This property defines a color used to adjust the specular reflections. Use white for no effect
|
translucencyChannel : enumeration |
This property defines the texture channel used to read the translucency value from
translucencyMap
。默认值为
Material.A
.
| 常量 | 描述 |
|---|---|
Material.R
|
Read value from texture R channel. |
Material.G
|
Read value from texture G channel. |
Material.B
|
Read value from texture B channel. |
Material.A
|
Read value from texture A channel. |
|
translucencyMap : Texture |
This property defines a grayscale Texture controlling how much light can pass through the material from behind.
|
translucentFalloff : real |
This property defines the amount of falloff for the translucency based on the angle of the normals of the object to the light source.
|
vertexColorsEnabled : bool |
When this property is enabled, the material will use vertex colors from the mesh. These will be multiplied by any other colors specified for the material.
