3D金字塔图（2）

来源：互联网发布：网络yy语音授课是什么编辑：程序博客网时间：2024/05/19 03:42

以前画过一个金字塔图，效果不是很好（有兴趣的话可以看看我的博客http://blog.csdn.net/chyuanrufeng/article/details/76473056）。这次这个是从另外一个角度观察的，配色自行修改。效果如下：
这里写图片描述

核心代码：

void test1::drawPyramid3( QPainter &painter ){    int w = width();    int h = height();    int x= w/2;    QPointF toppoint(x,h*0.2);     QPointF midbottompoint(x,h*0.9);     QPointF leftbottompoint(w*0.2,h*0.85);     QPointF rightbottompoint(w*0.8,h*0.85);     int laycount = 4;    int hsetp = (leftbottompoint.y()-toppoint.y())/laycount;    float wsetp = (rightbottompoint.x() - leftbottompoint.x())/2;     for (int i = laycount ; i > 0; --i)    {        float bpy = (midbottompoint.y() - toppoint.y())*i/laycount;        float tpy = (midbottompoint.y() - toppoint.y())*0.9/laycount;        QPointF tmpmidbp(x,toppoint.y()+bpy);  //底中间点         QPointF tmpmidtp(x,toppoint.y()+bpy-tpy);  //上部中间点        float txw = wsetp*i*0.95/laycount ;        float hlength = hsetp*i;        QPointF tmpleftbp(x-txw, toppoint.y() + hlength);  //底部左侧点        QPointF tmprightbp(x+txw,toppoint.y() + hlength); //底部右侧点        txw = wsetp*(i-1)/laycount;        //hlength = hsetp*(i-1);        QPointF tmplefttp(x-txw,toppoint.y() + hlength-hsetp*0.9);  //上部左侧点        QPointF tmprighttp(x+txw,toppoint.y() + hlength-hsetp*0.9); //上部右侧点        //左侧面        painter.save();        QPolygonF leftpolygon;        leftpolygon<<  tmpmidbp << tmpmidtp  << tmplefttp << tmpleftbp;        QLinearGradient leftgradient(tmpmidbp.x(),tmpleftbp.y(),tmplefttp.x(),tmplefttp.y());        //leftgradient.setColorAt(0,QColor("#00A8E1").lighter(120));        leftgradient.setColorAt(0,QColor("#FF0000").lighter(120));        leftgradient.setColorAt(0.5,QColor("#00A8E1").dark(100));        leftgradient.setColorAt(1,QColor("#246B95"));        painter.setBrush(leftgradient);        painter.drawPolygon(leftpolygon);        painter.restore();        //右侧        painter.save();        QPolygonF rightpolygon;        rightpolygon << tmpmidbp << tmpmidtp  <<tmprighttp << tmprightbp;        QLinearGradient rightgradient(tmpmidbp.x(),tmpmidbp.y(),tmplefttp.x(),tmplefttp.y());        rightgradient.setColorAt(0,QColor("#78DAFF").darker(120));        rightgradient.setColorAt(0.5,QColor("#00A8E1").dark(100));        rightgradient.setColorAt(1,QColor("#78DAFF"));        painter.setBrush(rightgradient);        painter.drawPolygon(rightpolygon);        painter.restore();        //顶        painter.save();        QPolygonF toppolygon;        toppolygon  << tmpmidtp  <<tmprighttp << tmplefttp;        QLinearGradient topgradient(tmpmidbp.x(),tmpmidbp.y(),tmplefttp.x(),tmplefttp.y());        topgradient.setColorAt(0,QColor("#78DAFF").darker(120));        topgradient.setColorAt(0.5,QColor("#00A8E1").dark(100));        topgradient.setColorAt(1,QColor("#78DAFF"));        painter.setBrush(rightgradient);        painter.drawPolygon(toppolygon);        painter.restore();    }}

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