ShaderNode类 参考

#include <ShaderTest.h>

类 ShaderNode 继承关系图:

ShaderNode 的协作图:

Public 成员函数
	CREATE_FUNC (ShaderNode)
virtual void	update (float dt) override
virtual void	setPosition (const cocos2d::Vec2 &newPosition) override
virtual void	draw (cocos2d::Renderer *renderer, const cocos2d::Mat4 &transform, uint32_t flags) override

静态 Public 成员函数
static ShaderNode *	shaderNodeWithVertex (const std::string &vert, const std::string &frag)

Protected 成员函数
	ShaderNode ()
	~ShaderNode ()
bool	initWithVertex (const std::string &vert, const std::string &frag)
void	loadShaderVertex (const std::string &vert, const std::string &frag)
virtual void	setProgramState (cocos2d::backend::ProgramState *programState) override
void	updateUniforms ()

Protected 属性
cocos2d::Vec2	_center
cocos2d::Vec2	_resolution
float	_time
std::string	_vertFileName
std::string	_fragFileName
cocos2d::CustomCommand	_customCommand
cocos2d::backend::UniformLocation	_locResolution
cocos2d::backend::UniformLocation	_locCenter
cocos2d::backend::UniformLocation	_locMVP
cocos2d::backend::UniformLocation	_locTime
cocos2d::backend::UniformLocation	_locSinTime
cocos2d::backend::UniformLocation	_locCosTime
cocos2d::backend::UniformLocation	_locScreenSize

详细描述

在文件 ShaderTest.h 第 138 行定义.

构造及析构函数说明

ShaderNode()

ShaderNode::ShaderNode ( )

protected

在文件 ShaderTest.cpp 第 74 行定义.

:_center(Vec2(0.0f, 0.0f))
,_resolution(Vec2(0.0f, 0.0f))
,_time(0.0f)
{
}

被这些函数引用 shaderNodeWithVertex().

这是这个函数的调用关系图:

~ShaderNode()

ShaderNode::~ShaderNode ( )

protected

在文件 ShaderTest.cpp 第 81 行定义.

{
}

成员函数说明

CREATE_FUNC()

ShaderNode::CREATE_FUNC

(

ShaderNode

)

draw()

void ShaderNode::draw ( cocos2d::Renderer *  renderer, const cocos2d::Mat4 &  transform, uint32_t  flags  )

overridevirtual

在文件 ShaderTest.cpp 第 169 行定义.

{
    _customCommand.init(_globalZOrder, transform, flags);
    
    _programState->setUniform(_locResolution, &_resolution, sizeof(_resolution));
    _programState->setUniform(_locCenter, &_center, sizeof(_center));
 
 
    auto projectionMatrix = Director::getInstance()->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);
    auto finalMatrix = projectionMatrix * transform;
 
    _programState->setUniform(_locMVP, finalMatrix.m, sizeof(finalMatrix.m));
 
    float time = Director::getInstance()->getTotalFrames() * Director::getInstance()->getAnimationInterval();
    Vec4 uTime(time / 10.0f, time, time * 2.0f, time * 4.0f);
    Vec4 sinTime(time / 8.0f, time / 4.0f, time / 2.0f, sinf(time));
    Vec4 cosTime(time / 8.0f, time / 4.0f, time / 2.0f, cosf(time));
 
    _programState->setUniform(_locTime, &uTime, sizeof(uTime));
    _programState->setUniform(_locSinTime, &sinTime, sizeof(sinTime));
    _programState->setUniform(_locCosTime, &cosTime, sizeof(cosTime));
 
    renderer->addCommand(&_customCommand);
    CC_INCREMENT_GL_DRAWN_BATCHES_AND_VERTICES(1, 6);
}

引用了 _center, _customCommand, _locCenter, _locCosTime, _locMVP, _locResolution, _locSinTime, _locTime , 以及 _resolution.

initWithVertex()

bool ShaderNode::initWithVertex ( const std::string &  vert, const std::string &  frag  )

protected

在文件 ShaderTest.cpp 第 94 行定义.

{
    _vertFileName = vert;
    _fragFileName = frag;
 
    loadShaderVertex(vert, frag);
 
    _time = 0;
    _resolution = Vec2(SIZE_X, SIZE_Y);
 
    scheduleUpdate();
 
    setContentSize(Size(SIZE_X, SIZE_Y));
    setAnchorPoint(Vec2(0.5f, 0.5f));
    
    // init custom command
    auto layout = _programState->getVertexLayout();
    layout->setAttribute("a_position", 0, backend::VertexFormat::FLOAT2, 0, false);
 
    float w = SIZE_X, h = SIZE_Y;
    Vec2 vertices[6] = { Vec2(0.0f,0.0f), Vec2(w,0.0f), Vec2(w,h), Vec2(0.0f,0.0f), Vec2(0.0f,h), Vec2(w,h) };
    layout->setLayout(sizeof(Vec2));
 
    /*
     * TODO: the Y-coordinate of subclasses are flipped in metal
     *
     * keywords: CC_USE_METAL , CC_USE_GL
     */
    
    _customCommand.createVertexBuffer(sizeof(Vec2), 6, CustomCommand::BufferUsage::STATIC);
    _customCommand.updateVertexBuffer(vertices, sizeof(vertices));
 
    _customCommand.setDrawType(CustomCommand::DrawType::ARRAY);
 
    return true;
}

引用了 _customCommand, _fragFileName, _resolution, _time, _vertFileName, loadShaderVertex(), SIZE_X , 以及 SIZE_Y.

函数调用图:

loadShaderVertex()

void ShaderNode::loadShaderVertex ( const std::string &  vert, const std::string &  frag  )

protected

在文件 ShaderTest.cpp 第 131 行定义.

{
    auto fileUtiles = FileUtils::getInstance();
 
    // frag
    auto fragmentFilePath = fileUtiles->fullPathForFilename(frag);
    auto fragSource = fileUtiles->getStringFromFile(fragmentFilePath);
 
    // vert
    std::string vertSource;
    if (vert.empty()) {
        vertSource = position_vert; 
    } else {
        std::string vertexFilePath = fileUtiles->fullPathForFilename(vert);
        vertSource = fileUtiles->getStringFromFile(vertexFilePath);
    }
    auto program = backend::Device::getInstance()->newProgram(vertSource.c_str(), fragSource.c_str());
    auto programState = new backend::ProgramState(program);
    setProgramState(programState);
    CC_SAFE_RELEASE(programState);
    CC_SAFE_RELEASE(program);
}

引用了 setProgramState().

被这些函数引用 initWithVertex().

函数调用图:

这是这个函数的调用关系图:

setPosition()

void ShaderNode::setPosition ( const cocos2d::Vec2 &  newPosition )

overridevirtual

在文件 ShaderTest.cpp 第 159 行定义.

{
    Node::setPosition(newPosition);
    auto position = getPosition();
    auto frameSize = Director::getInstance()->getOpenGLView()->getFrameSize();
    auto visibleSize = Director::getInstance()->getVisibleSize();
    auto retinaFactor = Director::getInstance()->getOpenGLView()->getRetinaFactor();
    _center = Vec2(position.x * frameSize.width / visibleSize.width * retinaFactor, position.y * frameSize.height / visibleSize.height * retinaFactor);
}

引用了 _center.

setProgramState()

virtual void ShaderNode::setProgramState ( cocos2d::backend::ProgramState *  programState )

inlineoverrideprotectedvirtual

在文件 ShaderTest.h 第 155 行定义.

    {
        if (programState != _programState)
        {
            CC_SAFE_RELEASE_NULL(_programState);
            _programState = programState;
            CC_SAFE_RETAIN(_programState);
        }
        _customCommand.getPipelineDescriptor().programState = programState;
        updateUniforms();
    }

引用了 _customCommand , 以及 updateUniforms().

被这些函数引用 loadShaderVertex().

函数调用图:

这是这个函数的调用关系图:

shaderNodeWithVertex()

ShaderNode * ShaderNode::shaderNodeWithVertex ( const std::string &  vert, const std::string &  frag  )

static

在文件 ShaderTest.cpp 第 85 行定义.

{
    auto node = new (std::nothrow) ShaderNode();
    node->initWithVertex(vert, frag);
    node->autorelease();
 
    return node;
}

引用了 ShaderNode().

被这些函数引用 ShaderMonjori::init(), ShaderMandelbrot::init(), ShaderJulia::init(), ShaderHeart::init(), ShaderFlower::init(), ShaderPlasma::init(), ShaderLensFlare::init() , 以及 ShaderGlow::init().

函数调用图:

这是这个函数的调用关系图:

update()

void ShaderNode::update ( float  dt )

overridevirtual

在文件 ShaderTest.cpp 第 154 行定义.

{
    _time += dt;
}

引用了 _time.

updateUniforms()

void ShaderNode::updateUniforms ( )

protected

在文件 ShaderTest.cpp 第 195 行定义.

{
    if(_programState == nullptr)
        return;
 
    _locResolution  = _programState->getUniformLocation("resolution");
    _locCenter      = _programState->getUniformLocation("center");
    _locMVP         = _programState->getUniformLocation("u_MVPMatrix");
    _locTime        = _programState->getUniformLocation("u_Time");
    _locSinTime     = _programState->getUniformLocation("u_SinTime");
    _locCosTime     = _programState->getUniformLocation("u_CosTime");
    _locScreenSize  = _programState->getUniformLocation("u_screenSize");
    
    const Vec2& frameSize = Director::getInstance()->getOpenGLView()->getFrameSize();
    float retinaFactor = Director::getInstance()->getOpenGLView()->getRetinaFactor();
    auto screenSizeInPixels = frameSize * retinaFactor;
    _programState->setUniform(_locScreenSize, &screenSizeInPixels, sizeof(screenSizeInPixels));
}

引用了 _locCenter, _locCosTime, _locMVP, _locResolution, _locScreenSize, _locSinTime , 以及 _locTime.

被这些函数引用 setProgramState().

这是这个函数的调用关系图:

类成员变量说明

_center

cocos2d::Vec2 ShaderNode::_center

protected

在文件 ShaderTest.h 第 169 行定义.

被这些函数引用 draw() , 以及 setPosition().

_customCommand

cocos2d::CustomCommand ShaderNode::_customCommand

protected

在文件 ShaderTest.h 第 174 行定义.

被这些函数引用 draw(), initWithVertex() , 以及 setProgramState().

_fragFileName

std::string ShaderNode::_fragFileName

protected

在文件 ShaderTest.h 第 173 行定义.

被这些函数引用 initWithVertex().

_locCenter

cocos2d::backend::UniformLocation ShaderNode::_locCenter

protected

在文件 ShaderTest.h 第 177 行定义.

被这些函数引用 draw() , 以及 updateUniforms().

_locCosTime

cocos2d::backend::UniformLocation ShaderNode::_locCosTime

protected

在文件 ShaderTest.h 第 181 行定义.

被这些函数引用 draw() , 以及 updateUniforms().

_locMVP

cocos2d::backend::UniformLocation ShaderNode::_locMVP

protected

在文件 ShaderTest.h 第 178 行定义.

被这些函数引用 draw() , 以及 updateUniforms().

_locResolution

cocos2d::backend::UniformLocation ShaderNode::_locResolution

protected

在文件 ShaderTest.h 第 176 行定义.

被这些函数引用 draw() , 以及 updateUniforms().

_locScreenSize

cocos2d::backend::UniformLocation ShaderNode::_locScreenSize

protected

在文件 ShaderTest.h 第 182 行定义.

被这些函数引用 updateUniforms().

_locSinTime

cocos2d::backend::UniformLocation ShaderNode::_locSinTime

protected

在文件 ShaderTest.h 第 180 行定义.

被这些函数引用 draw() , 以及 updateUniforms().

_locTime

cocos2d::backend::UniformLocation ShaderNode::_locTime

protected

在文件 ShaderTest.h 第 179 行定义.

被这些函数引用 draw() , 以及 updateUniforms().

_resolution

cocos2d::Vec2 ShaderNode::_resolution

protected

在文件 ShaderTest.h 第 170 行定义.

被这些函数引用 draw() , 以及 initWithVertex().

_time

float ShaderNode::_time

protected

在文件 ShaderTest.h 第 171 行定义.

被这些函数引用 initWithVertex() , 以及 update().

_vertFileName

std::string ShaderNode::_vertFileName

protected

在文件 ShaderTest.h 第 172 行定义.

被这些函数引用 initWithVertex().

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该类的文档由以下文件生成:

• /Users/yujizhu/Documents/Git/cocos2d-x-4.0/tests/cpp-tests/Classes/ShaderTest/ShaderTest.h
• /Users/yujizhu/Documents/Git/cocos2d-x-4.0/tests/cpp-tests/Classes/ShaderTest/ShaderTest.cpp