C++ (Cpp) CCDrawNode::clear示例

void CCClipOut::update(float time) {
    CCClippingNode* clipper = (CCClippingNode*)getTarget();
    CCDrawNode* stencil = (CCDrawNode*)clipper->getStencil();
    
    // clear
    stencil->clear();
    
    // build polygon
    float distance = m_distance * (1 - time);
    if(distance < FLT_EPSILON) {
        CCPoint v[] = {
            CCPointZero,
            CCPointZero,
            CCPointZero,
            CCPointZero
        };
        stencil->drawPolygon(v, 4, cc4fGREEN, 0, cc4fTRANSPARENT);
    } else {
        CCPoint v[] = {
            m_p1,
            m_p2,
            ccp(m_p2.x + distance * m_cos,
                m_p2.y + distance * m_sin),
            ccp(m_p1.x + distance * m_cos,
                m_p1.y + distance * m_sin)
        };
        stencil->drawPolygon(v, 4, cc4fGREEN, 0, cc4fTRANSPARENT);
    }
}

示例#2

显示文件

文件： CCClipIn.cpp 项目： aboduo/cocos2dx-classical

void CCClipIn::update(float time) {
    CCClippingNode* clipper = (CCClippingNode*)getTarget();
    CCDrawNode* stencil = (CCDrawNode*)clipper->getStencil();
    
    // clear
    stencil->clear();
    
    // build polygon
    float distance = m_distance * time;
    CCPoint v[] = {
        m_p1,
        m_p2,
        ccp(m_p2.x + distance * m_cos,
            m_p2.y + distance * m_sin),
        ccp(m_p1.x + distance * m_cos,
            m_p1.y + distance * m_sin)
    };
    stencil->drawPolygon(v, 4, cc4fGREEN, 0, cc4fTRANSPARENT);
}