Compiling and running qslim on Mac OS x

Alec Jacobson

May 23, 2013

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I recently successfully compiled and executed qslim on mac os x. It took a little tweaking but here's how I did it.

fltk

Before anything else, be sure to install fltk. I did this using macports:

sudo port install fltk

libgfx

Then, following the instructions in qslim-2.1/README.txt, I first compiled libgfx:

cd libgfx
./configure

The libpng support seems out of date and I don't really need it so in raster-png.cxx I replaced:

//#ifdef HAVE_LIBPNG
#if false

memcopy was shoing up undefined so I added the following include to raster.cxx:

#include <cstring>

Similarly there was a missing include in time.cxx:

#elif defined(HAVE_TIMES)
#include <sys/times.h>

Know, while inside libgfx I issue:

make -C src

mixkit

First travel inside mixkit and configure:

cd ../mixkit
./configure

Trying to make I got a bunch of errors of the form:

MxDynBlock.h:44:33: Error: 'resize' was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
MxDynBlock.h:44:33: Error: note: declarations in dependent base 'MxBlock<MxStdModel*>' are not found by unqualified lookup
MxDynBlock.h:44:33: Error: note: use 'this->resize' instead

There're at least two ways to fix this. You can add this-> everywhere gcc is tell you to: edit MxStack.h and MxDynBlock.h or you can add -fpermissive to the CXXFLAGS. This is awkwardly done not in mix-config but in ../libgfx/gfx-config. Where you can edit into something like:

CXXFLAGS = -g -O2  -I/Users/ajx/Downloads/qslim-2.1/libgfx/include -DHAVE_CONFIG_H $(WIN_FLAGS) -fpermissive

Alternatively you could have done this when configuring libgfx with:

cd ../libgfx
./configure CXXFLAGS='-fpermissive'
cd ../mixkit/

If you do it this way then you'll get warnings instead of errors. Now you can build with:

make -C src

qslim and qvis

Travel to the qslim tools directory:

cd ../tools/qslim

Here I need to add libfltk_gl to the linker commands in Makefile:

        $(CXX) -o qslim $(OBJS) $(LDFLAGS) $(LIBMIX) -lm -lfltk_gl
...
        $(CXX) -o qvis $(QVIS_OBJS) $(LDFLAGS) $(LIBMIX) $(GUI_LIBS) -lm -lfltk_gl

Then build with:

make

(those fpermissive warnings may show up again, but no problem) Finally I can run the command line program qslim or the gui qvis. For some reason the qui qvis.app immediately closes if I double click on it. But I can run it by issuing:

./qvis.app/Contents/MacOS/qvis

where I'm then prompted to load a .smf file. or

./qvis.app/Contents/MacOS/qvis input.smf

You can call the command line program with:

./qslim -t 1000 -M smf -q 2>/dev/null

which spills the .smf file to stdout It seems .smf format is the same as .obj, at least if there are only vertices and triangular faces. So, you can compose---a rather long---bash oneliner that simplifies an input.obj file to an output.obj file:

grep "^[vf] " input.obj | sed -e "s/^f *\([0-9][0-9]*\)\/[^ ]*  *\([0-9][0-9]*\)\/[^ ]*  *\([0-9][0-9]*\)\/.*/f \1 \2 \3/g" | ./qslim -t 1000 -M smf -q 2>/dev/null | grep "^[vf]" > output.obj

qslim/filters

I also built the "filters" (converters?) with:

cd ../filters
make

Note that ply2smf only acts on stdin and stdout so call it with:

cat input.ply | ./ply2smf >output.smf

Update: I found an easier way to setup the configure script and ensure that all macports libraries are found:

env CPPFLAGS="-I/opt/local/include -fpermissive" LDFLAGS="-L/opt/local/lib" ./configure