内容

• 特性
• 公共函数
• 公共槽
• 信号
• 详细描述

QGoochMaterial Class

class Qt3DExtras ::QGoochMaterial

The QGoochMaterial provides a material that implements the Gooch shading model, popular in CAD and CAM applications. 更多...

头：	#include <QGoochMaterial>
CMake:	find_package(Qt6 COMPONENTS 3dextras REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::3dextras)
qmake:	QT += 3dextras
Since:	Qt 5.7
继承：	Qt3DRender::QMaterial

• 所有成员列表，包括继承成员

特性

alpha : float beta : float cool : QColor diffuse : QColor

shininess : float specular : QColor warm : QColor

公共函数

	QGoochMaterial (Qt3DCore::QNode * parent = nullptr)
float	alpha () const
float	beta () const
QColor	cool () const
QColor	diffuse () const
float	shininess () const
QColor	specular () const
QColor	warm () const

公共槽

void	setAlpha (float alpha )
void	setBeta (float beta )
void	setCool (const QColor & cool )
void	setDiffuse (const QColor & diffuse )
void	setShininess (float shininess )
void	setSpecular (const QColor & specular )
void	setWarm (const QColor & warm )

信号

void	alphaChanged (float alpha )
void	betaChanged (float beta )
void	coolChanged (const QColor & cool )
void	diffuseChanged (const QColor & diffuse )
void	shininessChanged (float shininess )
void	specularChanged (const QColor & specular )
void	warmChanged (const QColor & warm )

详细描述

The Gooch lighting model uses both color and brightness to help show the curvature of 3D surfaces. This is often better than models such as Phong that rely purely upon changes in brightness. In situations such as in CAD and CAM applications where photorealism is not a goal, the Gooch shading model in conjunction with some kind of silhouette edge inking is a popular solution.

The Gooch lighting model is explained fully in the original Gooch paper . The Gooch model mixes a diffuse object color with a user-provided cool color and warm color to produce the end points of a color ramp that is used to shade the object based upon the cosine of the angle between the vector from the fragment to the light source and the fragment's normal vector. Optionally, a specular highlight can be added on top. The relative contributions to the cool and warm colors by the diffuse color are controlled by the alpha and beta properties respecitvely.

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.

特性文档编制

alpha : float

Holds the current alpha value. The start point of the color ramp used by the Gooch shader is calculated as {c = cool + alpha * diffuse}.

访问函数：

float	alpha () const
void	setAlpha (float alpha )

通知程序信号：

void	alphaChanged (float alpha )

beta : float

Holds the current beta value. The start point of the color ramp used by the Gooch shader is calculated as {c = warm + beta * diffuse}.

访问函数：

float	beta () const
void	setBeta (float beta )

通知程序信号：

void	betaChanged (float beta )

cool : QColor

Holds the current cool color.

访问函数：

QColor	cool () const
void	setCool (const QColor & cool )

通知程序信号：

void	coolChanged (const QColor & cool )

diffuse : QColor

Holds the current diffuse color.

访问函数：

QColor	diffuse () const
void	setDiffuse (const QColor & diffuse )

通知程序信号：

void	diffuseChanged (const QColor & diffuse )

shininess : float

Holds the current shininess value. Higher values of shininess result in a smaller and brighter highlight.

访问函数：

float	shininess () const
void	setShininess (float shininess )

通知程序信号：

void	shininessChanged (float shininess )

specular : QColor

Holds the current specular color.

访问函数：

QColor	specular () const
void	setSpecular (const QColor & specular )

通知程序信号：

void	specularChanged (const QColor & specular )

warm : QColor

Holds the current warm color.

访问函数：

QColor	warm () const
void	setWarm (const QColor & warm )

通知程序信号：

void	warmChanged (const QColor & warm )

成员函数文档编制

QGoochMaterial:: QGoochMaterial ( Qt3DCore::QNode * parent = nullptr)

Constructs a new QGoochMaterial instance with parent object parent .