85 lines
2.2 KiB
Text
85 lines
2.2 KiB
Text
You need to have the GPC library installed on your system to build
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some of the scenery generation tools, otherwise you won't be able to
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create scenery.
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Unfortunately, because of wording conflicts between the GPC license
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and the GPL licence used by TerraGear we are unable to include the GPC
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library with the Flight Gear distribution.
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Under Debian you can get the library as libgpcl-dev from the non-free
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repository and you are good to go.
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If you have to compile manually, you can get the library from:
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http://www.cs.man.ac.uk/aig/staff/alan/software/
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This library comes as a single source file and header with no build
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directions or Makefile. So, here are some directions contributed by
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Riley Rainey <riley.rainey@websimulations.com> with additional notes
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by Curt Olson:
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1. Download the GPC library source code from URL:
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http://www.cs.man.ac.uk/aig/staff/alan/software
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2. Unpack it; the current version seems to be 2.31:
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$ zcat gpc231.tar.Z | tar xvf -
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3. ***IMPORTANT STEP*** ***DO NOT SKIP***
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This is important step if you want to use gpc to generate quality
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scenery!
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Before building the library, edit the gpc.h file and change
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GPC_EPSILON to something bigger. You may experiment with this
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value, but the following seems to work well for me:
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#define GPC_EPSILON (0.000001)
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4. Copy in the Makefile attached to this message:
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$ cp Makefile ./gpc231
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5. Check install paths. Edit the Makefile and make sure the install
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paths are satisfactory. Also make sure that all the make commands
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have leading tabs (i.e. that the tabs aren't expanded out into 8
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spaces) otherwise the make will fail.
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6. Build and install it:
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$ cd ./gpc231
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$ make
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$ su
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Password:
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# make install
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-------------------------- snip ------------------------------
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# Unix/Linux makefile for GPC 2.32
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#
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# Riley Rainey (riley.rainey@websimulations.com)
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# Ralf Gerlich (ralf.gerlich (at) custom-scenery (dot) org)
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CFLAGS = -O -g
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PREFIX=/usr/local
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libgenpolyclip.a: gpc.o
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rm -f $@
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ar cr $@ $<
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ranlib $@
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clean:
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rm -f libgenpolyclip.a *.o core *~
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install: libgenpolyclip.a
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-mkdir -p $(PREFIX)/lib
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-mkdir -p $(PREFIX)/include
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install libgenpolyclip.a $(PREFIX)/lib/libgenpolyclip.a
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install gpc.h $(PREFIX)/include/gpc.h
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