1.1 --- a/sdr/demo.p.glsl	Wed Apr 11 16:59:45 2012 +0300
     1.2 +++ b/sdr/demo.p.glsl	Wed Apr 11 18:35:12 2012 +0300
     1.3 @@ -3,7 +3,7 @@
     1.4  	vec3 pos = gl_TexCoord[0].xyz * 2.0 - 1.0;
     1.5  
     1.6  	float len = length(pos);
     1.7 -	float val = 0.2 / (len * len);
     1.8 +	float val = 0.1 / (len * len);
     1.9  
    1.10  	gl_FragColor = vec4(-pos / len, val);
    1.11  }

     2.1 --- a/src/ui.cc	Wed Apr 11 16:59:45 2012 +0300
     2.2 +++ b/src/ui.cc	Wed Apr 11 18:35:12 2012 +0300
     2.3 @@ -62,16 +62,31 @@
     2.4  
     2.5  SideWindow::SideWindow()
     2.6  {
     2.7 -	QSlider *zslider = new QSlider(Qt::Horizontal);
     2.8 -	zslider->setRange(0, 256);
     2.9 -	zslider->setValue(volray_getvalue(VOLRAY_ZCURSOR) * 256.0);
    2.10 -	connect(zslider, SIGNAL(valueChanged(int)), this, SLOT(zslider_change(int)));
    2.11 +	QGroupBox *groupbox = new QGroupBox("Volume slice");
    2.12 +	{
    2.13 +		QCheckBox *chk_clip = new QCheckBox("clip");
    2.14 +		chk_clip->setChecked(false);
    2.15 +		connect(chk_clip, SIGNAL(stateChanged(int)), this, SLOT(clip_change(int)));
    2.16  
    2.17 -	QVBoxLayout *vbox = new QVBoxLayout;
    2.18 -	vbox->addWidget(zslider);
    2.19 +		QSlider *zslider = new QSlider(Qt::Horizontal);
    2.20 +		zslider->setRange(0, 256);
    2.21 +		zslider->setValue(volray_getvalue(VOLRAY_ZCURSOR) * 256.0);
    2.22 +		connect(zslider, SIGNAL(valueChanged(int)), this, SLOT(zslider_change(int)));
    2.23 +
    2.24 +		QVBoxLayout *vbox = new QVBoxLayout;
    2.25 +		vbox->addWidget(chk_clip);
    2.26 +		vbox->addWidget(zslider);
    2.27 +
    2.28 +		groupbox->setLayout(vbox);
    2.29 +	}
    2.30  
    2.31  	QWidget *win = new QWidget;
    2.32  	setWidget(win);
    2.33 +
    2.34 +	QVBoxLayout *vbox = new QVBoxLayout;
    2.35 +	vbox->addWidget(groupbox);
    2.36 +	vbox->addStretch();
    2.37 +
    2.38  	win->setLayout(vbox);
    2.39  }
    2.40  
    2.41 @@ -80,6 +95,10 @@
    2.42  	volray_setvalue(VOLRAY_ZCURSOR, (float)val / 256.0);
    2.43  }
    2.44  
    2.45 +void SideWindow::clip_change(int checked)
    2.46 +{
    2.47 +	volray_setvalue(VOLRAY_ZCLIP, checked);
    2.48 +}
    2.49  
    2.50  void post_redisplay()
    2.51  {

     3.1 --- a/src/ui.h	Wed Apr 11 16:59:45 2012 +0300
     3.2 +++ b/src/ui.h	Wed Apr 11 18:35:12 2012 +0300
     3.3 @@ -25,6 +25,7 @@
     3.4  	Q_OBJECT
     3.5  private slots:
     3.6  	void zslider_change(int val);
     3.7 +	void clip_change(int checked);
     3.8  
     3.9  public:
    3.10  	SideWindow();

     4.1 --- a/src/volray.cc	Wed Apr 11 16:59:45 2012 +0300
     4.2 +++ b/src/volray.cc	Wed Apr 11 18:35:12 2012 +0300
     4.3 @@ -96,6 +96,8 @@
     4.4  		post_redisplay();
     4.5  		break;
     4.6  
     4.7 +	case VOLRAY_ZCLIP:
     4.8 +
     4.9  	default:
    4.10  		break;
    4.11  	}