added controls for Zorin-Barr transformation

Only when using the compilation flag PANO_EXTENDED_CONTROLS. It is not
yet working, it remains to implement in the vertex shader.

openglcanvas.cpp

@@ -96,6 +96,18 @@ void OpenGLCanvas::change_fov_max(int new_fov_max){
     updateGL();
 }
 
+void OpenGLCanvas::change_zb_lambda(int new_zb_lambda){
+    zblambda=(float)new_zb_lambda/1000;
+    fprintf(stderr,"zb_lambda=%f\n",zblambda);
+    updateGL();
+}
+
+void OpenGLCanvas::change_zb_R(int new_zb_R){
+    zbR=(float)new_zb_R/1000;
+    fprintf(stderr,"zb_R=%f\n",zbR);
+    updateGL();
+}
+
 //void OpenGLCanvas::change_scale(double s){
 
 //    if (scale!=s && s>=0.0 && s<=1.0) scale = s;

openglcanvas.h

@@ -53,6 +53,8 @@ public slots:
     void change_fov(double f);
     void change_fov(int new_fov);
     void change_fov_max(int new_fov_max);
+    void change_zb_lambda(int new_zb_lambda);
+    void change_zb_R(int new_zb_R);
 //    void change_scale(double s);
     void change_center_lambda(double lambda);
     void change_center_phi(double phi);

pano_interface_1.pro

@@ -6,6 +6,9 @@
 
 QT       += core gui opengl
 
+# uncomment to show in the main window controls for other methods
+DEFINES += PANO_EXTENDED_CONTROLS
+
 # compiler specific settings
 darwin-g++*|macx-g++*|linux-g++*|win32-g++*|cygwin-g++* {
 QMAKE_CXXFLAGS += -ansi -pedantic -Wno-long-long
@@ -75,7 +78,8 @@ HEADERS  += panowindow1.h \
     image_read.h \
     files.h
 
-FORMS    += panowindow1.ui
+FORMS    += panowindow1.ui \
+    extended_controls.ui
 
 OTHER_FILES += \
     shaders/fragment_shader.frag \

panowindow1.cpp

 #include "panowindow1.h"
+#ifdef PANO_EXTENDED_CONTROLS
+#include "ui_extended_controls.h"
+#else
 #include "ui_panowindow1.h"
+#endif
 
 PanoWindow1::PanoWindow1(QWidget *parent) :
     QWidget(parent),