3rdparty/qwtplot3d/qwtplot3d.pri          |    8 ++++----
 3rdparty/qwtplot3d/qwtplot3d.pro          |    3 ---
 3rdparty/qwtplot3d/src/qwt3d_io_gl2ps.cpp |    2 +-
 3rdparty/qwtplot3d/src/qwt3d_label.cpp    |    2 +-
 4 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/3rdparty/qwtplot3d/qwtplot3d.pri b/3rdparty/qwtplot3d/qwtplot3d.pri
index 45a0c3e..16bbe53 100755
--- a/3rdparty/qwtplot3d/qwtplot3d.pri
+++ b/3rdparty/qwtplot3d/qwtplot3d.pri
@@ -8,6 +8,8 @@ DEPENDPATH += src \
     3rdparty\gl2ps
 INCLUDEPATH += .
 
+LIBS+=-lgl2ps
+
 # Input
 HEADERS += include/qwt3d_extglwidget.h \
     include/qwt3d_color.h \
@@ -37,8 +39,7 @@ HEADERS += include/qwt3d_extglwidget.h \
     include/qwt3d_volumeplot.h \
     include/qwt3d_graphplot.h \
     include/qwt3d_multiplot.h \
-    include/qwt3d_io_gl2ps.h \
-    3rdparty/gl2ps/gl2ps.h
+    include/qwt3d_io_gl2ps.h
 SOURCES += src/qwt3d_extglwidget.cpp \
     src/qwt3d_axis.cpp \
     src/qwt3d_color.cpp \
@@ -62,5 +63,4 @@ SOURCES += src/qwt3d_extglwidget.cpp \
     src/qwt3d_function.cpp \
     src/qwt3d_gridplot.cpp \
     src/qwt3d_meshplot.cpp \
-    src/qwt3d_io_gl2ps.cpp \
-    3rdparty/gl2ps/gl2ps.c
+    src/qwt3d_io_gl2ps.cpp
diff --git a/3rdparty/qwtplot3d/qwtplot3d.pro b/3rdparty/qwtplot3d/qwtplot3d.pro
index 95c8e26..18d03e3 100755
--- a/3rdparty/qwtplot3d/qwtplot3d.pro
+++ b/3rdparty/qwtplot3d/qwtplot3d.pro
@@ -31,9 +31,6 @@ RCC_DIR      = $$DESTDIR/tmp
 MOC_DIR      = $$DESTDIR/tmp
 
 DEFINES     += GL2PS_HAVE_LIBPNG
-INCLUDEPATH += ../zlib/
-INCLUDEPATH += ../libpng/
-LIBS        += ../libpng/libpng.a
 
 # install
 target.path = lib
diff --git a/3rdparty/qwtplot3d/src/qwt3d_io_gl2ps.cpp b/3rdparty/qwtplot3d/src/qwt3d_io_gl2ps.cpp
index bc7a9d8..589cfd2 100755
--- a/3rdparty/qwtplot3d/src/qwt3d_io_gl2ps.cpp
+++ b/3rdparty/qwtplot3d/src/qwt3d_io_gl2ps.cpp
@@ -6,7 +6,7 @@
 #include <locale.h>
 
 #include "qwt3d_openglhelper.h"
-#include "../3rdparty/gl2ps/gl2ps.h"
+#include "gl2ps.h"
 #include "qwt3d_io_gl2ps.h"
 #include "qwt3d_plot.h"
 
diff --git a/3rdparty/qwtplot3d/src/qwt3d_label.cpp b/3rdparty/qwtplot3d/src/qwt3d_label.cpp
index 7e54ad9..cc8bd60 100755
--- a/3rdparty/qwtplot3d/src/qwt3d_label.cpp
+++ b/3rdparty/qwtplot3d/src/qwt3d_label.cpp
@@ -1,7 +1,7 @@
 #include <qbitmap.h>
 #include "qwt3d_label.h"
 #include "qwt3d_plot.h"
-#include "../3rdparty/gl2ps/gl2ps.h"
+#include "gl2ps.h"
 
 using namespace Qwt3D;