Initial commit.

16 files changed, 4765 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7163e7a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+*.swp
+/.sconsign.dblite
+*.vim
+*.o
+/gressd
+*.exe
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..c496c3d
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "common"]
+	path = common
+	url = git://git.jvnv.net/gress-common
diff --git a/SConstruct b/SConstruct
new file mode 100644
index 0000000..2952dbc
--- /dev/null
+++ b/SConstruct
@@ -0,0 +1,33 @@
+import os
+
+env = Environment(
+	ENV = os.environ,
+)
+
+AddOption('--release', action = 'store_true')
+AddOption('--profiling', action = 'store_true')
+AddOption('--mingw32', action = 'store_true')
+
+env.Append(CPPPATH = ['.', 'common'])
+
+# cross-compiling
+if GetOption('mingw32'):
+	env.Append(LIBS = ['winmm', 'wsock32', 'ws2_32', 'mingw32', 'noise', 'boost_filesystem-mt-s', 'boost_system-mt-s', 'boost_thread_win32-mt-s'])
+	env.Append(LINKFLAGS = ['-static-libgcc', '-static-libstdc++'])
+	env.Append(CPPFLAGS = ['-D_WIN32_WINDOWS', '-DBOOST_THREAD_USE_LIB'])
+	env['CXX'] = 'i486-mingw32-g++'
+else:
+	env.Append(LIBS = ['noise', 'boost_filesystem', 'boost_thread'])
+
+if not GetOption('release'):
+	env.Append(CPPFLAGS = ['-Wall', '-g'])
+
+if GetOption('profiling'):
+	env.Append(CPPFLAGS = ['-pg'])
+	env.Append(LINKFLAGS = ['-pg'])
+
+Export('env')
+
+env.Program('gressd.exe' if GetOption('mingw32') else 'gressd', Glob('*.cpp') + Glob('common/*.cpp') + ['noiseutils/noiseutils.cpp'])
+
+# vim: syn=python
diff --git a/common b/common
new file mode 160000
+Subproject 1211f632092db824fb2c880063599f7642c34f3
diff --git a/connection.cpp b/connection.cpp
new file mode 100644
index 0000000..3b5076c
--- /dev/null
+++ b/connection.cpp
@@ -0,0 +1,59 @@
+#include "connection.h"
+#include "vector.h"
+
+using std::min;
+using std::max;
+
+Connection::Connection(boost::asio::io_service& io_service_) : io_service(io_service_), socket(io_service_) {
+}
+
+float Connection::distance(float px, float pz) {
+	bool in_width = px > pos.x && px < pos.x+1;
+	bool in_height = pz > pos.z && pz < pos.z+1;
+
+	if(in_width && in_height)
+		return 0;
+
+	Vector2 p(px, pz);
+
+	float a = (p - pos.xz()).length();
+	float b = (p - (pos.xz() + Vector2(1, 0))).length();
+	float c = (p - (pos.xz() + Vector2(0, 1))).length();
+	float d = (p - (pos.xz() + Vector2(1, 1))).length();
+
+	float dist = min(min(min(a, b), c), d);
+
+	if(in_width)
+		dist = min(dist, (float)min(abs(pos.z - pz), abs(pos.z+1 - pz)));
+	if(in_height)
+		dist = min(dist, (float)min(abs(pos.x - px), abs(pos.x+1 - px)));
+
+	return dist;
+}
+
+std::set<std::pair<int64_t, int64_t> > Connection::check_chunks() {
+	// TODO: make configurable
+	const int chunk_size = 32;
+	const int chunk_dist_threshold = chunk_size*4;
+
+	// list of chunks client should hold
+	std::set<std::pair<int64_t, int64_t> > new_chunks;
+	int i = pos.x - chunk_dist_threshold;
+	i -= i % chunk_size;
+	for(; i < pos.x + chunk_dist_threshold; i += chunk_size) {
+		int j = pos.z - chunk_dist_threshold;
+		j -= j % chunk_size;
+		for(; j < pos.z + chunk_dist_threshold; j += chunk_size) {
+			if(chunk_indices.find(std::pair<int64_t, int64_t>(i, j)) != chunk_indices.end())
+				continue;
+			float a = i - pos.x + chunk_size/2;
+			float b = j - pos.z + chunk_size/2;
+			if(sqrtf(a*a + b*b) < chunk_dist_threshold) {
+				chunk_indices.insert(std::pair<int64_t, int64_t>(i, j));
+				new_chunks.insert(std::pair<int64_t, int64_t>(i, j));
+			}
+		}
+	}
+
+	return new_chunks;
+}
diff --git a/connection.h b/connection.h
new file mode 100644
index 0000000..78603e4
--- /dev/null
+++ b/connection.h
@@ -0,0 +1,30 @@
+#ifndef CONNECTION_H
+#define CONNECTION_H
+
+#include "vector.h"
+
+#include <boost/shared_ptr.hpp>
+#include <boost/asio.hpp>
+
+#include <set>
+
+class Connection {
+	private:
+		boost::asio::io_service& io_service;
+
+	public:
+		typedef boost::shared_ptr<Connection> p;
+
+		boost::asio::ip::tcp::socket socket;
+
+		Connection(boost::asio::io_service& io_service_);
+
+		float distance(float px, float pz);
+		std::set<std::pair<int64_t, int64_t> > check_chunks();
+
+		/* data */
+		Vector3 pos;
+		std::set<std::pair<int64_t, int64_t> > chunk_indices;
+};
+
+#endif
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..a7a1c34
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,28 @@
+#include "server.h"
+
+#include <boost/asio.hpp>
+#include <boost/thread.hpp>
+
+#ifdef WIN32
+/* hachish fix for mingw builds */
+namespace boost {
+	void tss_cleanup_implemented() { }
+}
+#endif
+
+int main(int argc, char **argv) {
+	boost::asio::io_service io_service;
+	Server server(io_service);
+
+	std::size_t num_threads = 1;
+	std::vector<boost::shared_ptr<boost::thread> > threads;
+	for(std::size_t i = 0; i < num_threads; i++) {
+		boost::shared_ptr<boost::thread> thread(new boost::thread(boost::bind(&boost::asio::io_service::run, &io_service)));
+		threads.push_back(thread);
+	}
+	for(std::size_t i = 0; i < num_threads; i++) {
+		threads[i]->join();
+	}
+
+	return 0;
+}
diff --git a/noiseutils/COPYING.txt b/noiseutils/COPYING.txt
new file mode 100644
index 0000000..cbee875
--- /dev/null
+++ b/noiseutils/COPYING.txt
@@ -0,0 +1,504 @@
+		  GNU LESSER GENERAL PUBLIC LICENSE

+		       Version 2.1, February 1999

+

+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.

+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

+ Everyone is permitted to copy and distribute verbatim copies

+ of this license document, but changing it is not allowed.

+

+[This is the first released version of the Lesser GPL.  It also counts

+ as the successor of the GNU Library Public License, version 2, hence

+ the version number 2.1.]

+

+			    Preamble

+

+  The licenses for most software are designed to take away your

+freedom to share and change it.  By contrast, the GNU General Public

+Licenses are intended to guarantee your freedom to share and change

+free software--to make sure the software is free for all its users.

+

+  This license, the Lesser General Public License, applies to some

+specially designated software packages--typically libraries--of the

+Free Software Foundation and other authors who decide to use it.  You

+can use it too, but we suggest you first think carefully about whether

+this license or the ordinary General Public License is the better

+strategy to use in any particular case, based on the explanations below.

+

+  When we speak of free software, we are referring to freedom of use,

+not price.  Our General Public Licenses are designed to make sure that

+you have the freedom to distribute copies of free software (and charge

+for this service if you wish); that you receive source code or can get

+it if you want it; that you can change the software and use pieces of

+it in new free programs; and that you are informed that you can do

+these things.

+

+  To protect your rights, we need to make restrictions that forbid

+distributors to deny you these rights or to ask you to surrender these

+rights.  These restrictions translate to certain responsibilities for

+you if you distribute copies of the library or if you modify it.

+

+  For example, if you distribute copies of the library, whether gratis

+or for a fee, you must give the recipients all the rights that we gave

+you.  You must make sure that they, too, receive or can get the source

+code.  If you link other code with the library, you must provide

+complete object files to the recipients, so that they can relink them

+with the library after making changes to the library and recompiling

+it.  And you must show them these terms so they know their rights.

+

+  We protect your rights with a two-step method: (1) we copyright the

+library, and (2) we offer you this license, which gives you legal

+permission to copy, distribute and/or modify the library.

+

+  To protect each distributor, we want to make it very clear that

+there is no warranty for the free library.  Also, if the library is

+modified by someone else and passed on, the recipients should know

+that what they have is not the original version, so that the original

+author's reputation will not be affected by problems that might be

+introduced by others.

+

+  Finally, software patents pose a constant threat to the existence of

+any free program.  We wish to make sure that a company cannot

+effectively restrict the users of a free program by obtaining a

+restrictive license from a patent holder.  Therefore, we insist that

+any patent license obtained for a version of the library must be

+consistent with the full freedom of use specified in this license.

+

+  Most GNU software, including some libraries, is covered by the

+ordinary GNU General Public License.  This license, the GNU Lesser

+General Public License, applies to certain designated libraries, and

+is quite different from the ordinary General Public License.  We use

+this license for certain libraries in order to permit linking those

+libraries into non-free programs.

+

+  When a program is linked with a library, whether statically or using

+a shared library, the combination of the two is legally speaking a

+combined work, a derivative of the original library.  The ordinary

+General Public License therefore permits such linking only if the

+entire combination fits its criteria of freedom.  The Lesser General

+Public License permits more lax criteria for linking other code with

+the library.

+

+  We call this license the "Lesser" General Public License because it

+does Less to protect the user's freedom than the ordinary General

+Public License.  It also provides other free software developers Less

+of an advantage over competing non-free programs.  These disadvantages

+are the reason we use the ordinary General Public License for many

+libraries.  However, the Lesser license provides advantages in certain

+special circumstances.

+

+  For example, on rare occasions, there may be a special need to

+encourage the widest possible use of a certain library, so that it becomes

+a de-facto standard.  To achieve this, non-free programs must be

+allowed to use the library.  A more frequent case is that a free

+library does the same job as widely used non-free libraries.  In this

+case, there is little to gain by limiting the free library to free

+software only, so we use the Lesser General Public License.

+

+  In other cases, permission to use a particular library in non-free

+programs enables a greater number of people to use a large body of

+free software.  For example, permission to use the GNU C Library in

+non-free programs enables many more people to use the whole GNU

+operating system, as well as its variant, the GNU/Linux operating

+system.

+

+  Although the Lesser General Public License is Less protective of the

+users' freedom, it does ensure that the user of a program that is

+linked with the Library has the freedom and the wherewithal to run

+that program using a modified version of the Library.

+

+  The precise terms and conditions for copying, distribution and

+modification follow.  Pay close attention to the difference between a

+"work based on the library" and a "work that uses the library".  The

+former contains code derived from the library, whereas the latter must

+be combined with the library in order to run.

+

+		  GNU LESSER GENERAL PUBLIC LICENSE

+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

+

+  0. This License Agreement applies to any software library or other

+program which contains a notice placed by the copyright holder or

+other authorized party saying it may be distributed under the terms of

+this Lesser General Public License (also called "this License").

+Each licensee is addressed as "you".

+

+  A "library" means a collection of software functions and/or data

+prepared so as to be conveniently linked with application programs

+(which use some of those functions and data) to form executables.

+

+  The "Library", below, refers to any such software library or work

+which has been distributed under these terms.  A "work based on the

+Library" means either the Library or any derivative work under

+copyright law: that is to say, a work containing the Library or a

+portion of it, either verbatim or with modifications and/or translated

+straightforwardly into another language.  (Hereinafter, translation is

+included without limitation in the term "modification".)

+

+  "Source code" for a work means the preferred form of the work for

+making modifications to it.  For a library, complete source code means

+all the source code for all modules it contains, plus any associated

+interface definition files, plus the scripts used to control compilation

+and installation of the library.

+

+  Activities other than copying, distribution and modification are not

+covered by this License; they are outside its scope.  The act of

+running a program using the Library is not restricted, and output from

+such a program is covered only if its contents constitute a work based

+on the Library (independent of the use of the Library in a tool for

+writing it).  Whether that is true depends on what the Library does

+and what the program that uses the Library does.

+  

+  1. You may copy and distribute verbatim copies of the Library's

+complete source code as you receive it, in any medium, provided that

+you conspicuously and appropriately publish on each copy an

+appropriate copyright notice and disclaimer of warranty; keep intact

+all the notices that refer to this License and to the absence of any

+warranty; and distribute a copy of this License along with the

+Library.

+

+  You may charge a fee for the physical act of transferring a copy,

+and you may at your option offer warranty protection in exchange for a

+fee.

+

+  2. You may modify your copy or copies of the Library or any portion

+of it, thus forming a work based on the Library, and copy and

+distribute such modifications or work under the terms of Section 1

+above, provided that you also meet all of these conditions:

+

+    a) The modified work must itself be a software library.

+

+    b) You must cause the files modified to carry prominent notices

+    stating that you changed the files and the date of any change.

+

+    c) You must cause the whole of the work to be licensed at no

+    charge to all third parties under the terms of this License.

+

+    d) If a facility in the modified Library refers to a function or a

+    table of data to be supplied by an application program that uses

+    the facility, other than as an argument passed when the facility

+    is invoked, then you must make a good faith effort to ensure that,

+    in the event an application does not supply such function or

+    table, the facility still operates, and performs whatever part of

+    its purpose remains meaningful.

+

+    (For example, a function in a library to compute square roots has

+    a purpose that is entirely well-defined independent of the

+    application.  Therefore, Subsection 2d requires that any

+    application-supplied function or table used by this function must

+    be optional: if the application does not supply it, the square

+    root function must still compute square roots.)

+

+These requirements apply to the modified work as a whole.  If

+identifiable sections of that work are not derived from the Library,

+and can be reasonably considered independent and separate works in

+themselves, then this License, and its terms, do not apply to those

+sections when you distribute them as separate works.  But when you

+distribute the same sections as part of a whole which is a work based

+on the Library, the distribution of the whole must be on the terms of

+this License, whose permissions for other licensees extend to the

+entire whole, and thus to each and every part regardless of who wrote

+it.

+

+Thus, it is not the intent of this section to claim rights or contest

+your rights to work written entirely by you; rather, the intent is to

+exercise the right to control the distribution of derivative or

+collective works based on the Library.

+

+In addition, mere aggregation of another work not based on the Library

+with the Library (or with a work based on the Library) on a volume of

+a storage or distribution medium does not bring the other work under

+the scope of this License.

+

+  3. You may opt to apply the terms of the ordinary GNU General Public

+License instead of this License to a given copy of the Library.  To do

+this, you must alter all the notices that refer to this License, so

+that they refer to the ordinary GNU General Public License, version 2,

+instead of to this License.  (If a newer version than version 2 of the

+ordinary GNU General Public License has appeared, then you can specify

+that version instead if you wish.)  Do not make any other change in

+these notices.

+

+  Once this change is made in a given copy, it is irreversible for

+that copy, so the ordinary GNU General Public License applies to all

+subsequent copies and derivative works made from that copy.

+

+  This option is useful when you wish to copy part of the code of

+the Library into a program that is not a library.

+

+  4. You may copy and distribute the Library (or a portion or

+derivative of it, under Section 2) in object code or executable form

+under the terms of Sections 1 and 2 above provided that you accompany

+it with the complete corresponding machine-readable source code, which

+must be distributed under the terms of Sections 1 and 2 above on a

+medium customarily used for software interchange.

+

+  If distribution of object code is made by offering access to copy

+from a designated place, then offering equivalent access to copy the

+source code from the same place satisfies the requirement to

+distribute the source code, even though third parties are not

+compelled to copy the source along with the object code.

+

+  5. A program that contains no derivative of any portion of the

+Library, but is designed to work with the Library by being compiled or

+linked with it, is called a "work that uses the Library".  Such a

+work, in isolation, is not a derivative work of the Library, and

+therefore falls outside the scope of this License.

+

+  However, linking a "work that uses the Library" with the Library

+creates an executable that is a derivative of the Library (because it

+contains portions of the Library), rather than a "work that uses the

+library".  The executable is therefore covered by this License.

+Section 6 states terms for distribution of such executables.

+

+  When a "work that uses the Library" uses material from a header file

+that is part of the Library, the object code for the work may be a

+derivative work of the Library even though the source code is not.

+Whether this is true is especially significant if the work can be

+linked without the Library, or if the work is itself a library.  The

+threshold for this to be true is not precisely defined by law.

+

+  If such an object file uses only numerical parameters, data

+structure layouts and accessors, and small macros and small inline

+functions (ten lines or less in length), then the use of the object

+file is unrestricted, regardless of whether it is legally a derivative

+work.  (Executables containing this object code plus portions of the

+Library will still fall under Section 6.)

+

+  Otherwise, if the work is a derivative of the Library, you may

+distribute the object code for the work under the terms of Section 6.

+Any executables containing that work also fall under Section 6,

+whether or not they are linked directly with the Library itself.

+

+  6. As an exception to the Sections above, you may also combine or

+link a "work that uses the Library" with the Library to produce a

+work containing portions of the Library, and distribute that work

+under terms of your choice, provided that the terms permit

+modification of the work for the customer's own use and reverse

+engineering for debugging such modifications.

+

+  You must give prominent notice with each copy of the work that the

+Library is used in it and that the Library and its use are covered by

+this License.  You must supply a copy of this License.  If the work

+during execution displays copyright notices, you must include the

+copyright notice for the Library among them, as well as a reference

+directing the user to the copy of this License.  Also, you must do one

+of these things:

+

+    a) Accompany the work with the complete corresponding

+    machine-readable source code for the Library including whatever

+    changes were used in the work (which must be distributed under

+    Sections 1 and 2 above); and, if the work is an executable linked

+    with the Library, with the complete machine-readable "work that

+    uses the Library", as object code and/or source code, so that the

+    user can modify the Library and then relink to produce a modified

+    executable containing the modified Library.  (It is understood

+    that the user who changes the contents of definitions files in the

+    Library will not necessarily be able to recompile the application

+    to use the modified definitions.)

+

+    b) Use a suitable shared library mechanism for linking with the

+    Library.  A suitable mechanism is one that (1) uses at run time a

+    copy of the library already present on the user's computer system,

+    rather than copying library functions into the executable, and (2)

+    will operate properly with a modified version of the library, if

+    the user installs one, as long as the modified version is

+    interface-compatible with the version that the work was made with.

+

+    c) Accompany the work with a written offer, valid for at

+    least three years, to give the same user the materials

+    specified in Subsection 6a, above, for a charge no more

+    than the cost of performing this distribution.

+

+    d) If distribution of the work is made by offering access to copy

+    from a designated place, offer equivalent access to copy the above

+    specified materials from the same place.

+

+    e) Verify that the user has already received a copy of these

+    materials or that you have already sent this user a copy.

+

+  For an executable, the required form of the "work that uses the

+Library" must include any data and utility programs needed for

+reproducing the executable from it.  However, as a special exception,

+the materials to be distributed need not include anything that is

+normally distributed (in either source or binary form) with the major

+components (compiler, kernel, and so on) of the operating system on

+which the executable runs, unless that component itself accompanies

+the executable.

+

+  It may happen that this requirement contradicts the license

+restrictions of other proprietary libraries that do not normally

+accompany the operating system.  Such a contradiction means you cannot

+use both them and the Library together in an executable that you

+distribute.

+

+  7. You may place library facilities that are a work based on the

+Library side-by-side in a single library together with other library

+facilities not covered by this License, and distribute such a combined

+library, provided that the separate distribution of the work based on

+the Library and of the other library facilities is otherwise

+permitted, and provided that you do these two things:

+

+    a) Accompany the combined library with a copy of the same work

+    based on the Library, uncombined with any other library

+    facilities.  This must be distributed under the terms of the

+    Sections above.

+

+    b) Give prominent notice with the combined library of the fact

+    that part of it is a work based on the Library, and explaining

+    where to find the accompanying uncombined form of the same work.

+

+  8. You may not copy, modify, sublicense, link with, or distribute

+the Library except as expressly provided under this License.  Any

+attempt otherwise to copy, modify, sublicense, link with, or

+distribute the Library is void, and will automatically terminate your

+rights under this License.  However, parties who have received copies,

+or rights, from you under this License will not have their licenses

+terminated so long as such parties remain in full compliance.

+

+  9. You are not required to accept this License, since you have not

+signed it.  However, nothing else grants you permission to modify or

+distribute the Library or its derivative works.  These actions are

+prohibited by law if you do not accept this License.  Therefore, by

+modifying or distributing the Library (or any work based on the

+Library), you indicate your acceptance of this License to do so, and

+all its terms and conditions for copying, distributing or modifying

+the Library or works based on it.

+

+  10. Each time you redistribute the Library (or any work based on the

+Library), the recipient automatically receives a license from the

+original licensor to copy, distribute, link with or modify the Library

+subject to these terms and conditions.  You may not impose any further

+restrictions on the recipients' exercise of the rights granted herein.

+You are not responsible for enforcing compliance by third parties with

+this License.

+

+  11. If, as a consequence of a court judgment or allegation of patent

+infringement or for any other reason (not limited to patent issues),

+conditions are imposed on you (whether by court order, agreement or

+otherwise) that contradict the conditions of this License, they do not

+excuse you from the conditions of this License.  If you cannot

+distribute so as to satisfy simultaneously your obligations under this

+License and any other pertinent obligations, then as a consequence you

+may not distribute the Library at all.  For example, if a patent

+license would not permit royalty-free redistribution of the Library by

+all those who receive copies directly or indirectly through you, then

+the only way you could satisfy both it and this License would be to

+refrain entirely from distribution of the Library.

+

+If any portion of this section is held invalid or unenforceable under any

+particular circumstance, the balance of the section is intended to apply,

+and the section as a whole is intended to apply in other circumstances.

+

+It is not the purpose of this section to induce you to infringe any

+patents or other property right claims or to contest validity of any

+such claims; this section has the sole purpose of protecting the

+integrity of the free software distribution system which is

+implemented by public license practices.  Many people have made

+generous contributions to the wide range of software distributed

+through that system in reliance on consistent application of that

+system; it is up to the author/donor to decide if he or she is willing

+to distribute software through any other system and a licensee cannot

+impose that choice.

+

+This section is intended to make thoroughly clear what is believed to

+be a consequence of the rest of this License.

+

+  12. If the distribution and/or use of the Library is restricted in

+certain countries either by patents or by copyrighted interfaces, the

+original copyright holder who places the Library under this License may add

+an explicit geographical distribution limitation excluding those countries,

+so that distribution is permitted only in or among countries not thus

+excluded.  In such case, this License incorporates the limitation as if

+written in the body of this License.

+

+  13. The Free Software Foundation may publish revised and/or new

+versions of the Lesser General Public License from time to time.

+Such new versions will be similar in spirit to the present version,

+but may differ in detail to address new problems or concerns.

+

+Each version is given a distinguishing version number.  If the Library

+specifies a version number of this License which applies to it and

+"any later version", you have the option of following the terms and

+conditions either of that version or of any later version published by

+the Free Software Foundation.  If the Library does not specify a

+license version number, you may choose any version ever published by

+the Free Software Foundation.

+

+  14. If you wish to incorporate parts of the Library into other free

+programs whose distribution conditions are incompatible with these,

+write to the author to ask for permission.  For software which is

+copyrighted by the Free Software Foundation, write to the Free

+Software Foundation; we sometimes make exceptions for this.  Our

+decision will be guided by the two goals of preserving the free status

+of all derivatives of our free software and of promoting the sharing

+and reuse of software generally.

+

+			    NO WARRANTY

+

+  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO

+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.

+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR

+OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY

+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE

+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE

+LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME

+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

+

+  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN

+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY

+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU

+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR

+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE

+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING

+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A

+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF

+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH

+DAMAGES.

+

+		     END OF TERMS AND CONDITIONS

+

+           How to Apply These Terms to Your New Libraries

+

+  If you develop a new library, and you want it to be of the greatest

+possible use to the public, we recommend making it free software that

+everyone can redistribute and change.  You can do so by permitting

+redistribution under these terms (or, alternatively, under the terms of the

+ordinary General Public License).

+

+  To apply these terms, attach the following notices to the library.  It is

+safest to attach them to the start of each source file to most effectively

+convey the exclusion of warranty; and each file should have at least the

+"copyright" line and a pointer to where the full notice is found.

+

+    <one line to give the library's name and a brief idea of what it does.>

+    Copyright (C) <year>  <name of author>

+

+    This library is free software; you can redistribute it and/or

+    modify it under the terms of the GNU Lesser General Public

+    License as published by the Free Software Foundation; either

+    version 2.1 of the License, or (at your option) any later version.

+

+    This library is distributed in the hope that it will be useful,

+    but WITHOUT ANY WARRANTY; without even the implied warranty of

+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

+    Lesser General Public License for more details.

+

+    You should have received a copy of the GNU Lesser General Public

+    License along with this library; if not, write to the Free Software

+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

+

+Also add information on how to contact you by electronic and paper mail.

+

+You should also get your employer (if you work as a programmer) or your

+school, if any, to sign a "copyright disclaimer" for the library, if

+necessary.  Here is a sample; alter the names:

+

+  Yoyodyne, Inc., hereby disclaims all copyright interest in the

+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.

+

+  <signature of Ty Coon>, 1 April 1990

+  Ty Coon, President of Vice

+

+That's all there is to it!

+

+

diff --git a/noiseutils/noiseutils.cpp b/noiseutils/noiseutils.cpp
new file mode 100644
index 0000000..ddcac1b
--- /dev/null
+++ b/noiseutils/noiseutils.cpp
@@ -0,0 +1,1298 @@
+// noiseutils.cpp

+//

+// Copyright (C) 2003-2005 Jason Bevins

+//

+// This library is free software; you can redistribute it and/or modify it

+// under the terms of the GNU Lesser General Public License as published by

+// the Free Software Foundation; either version 2.1 of the License, or (at

+// your option) any later version.

+//

+// This library is distributed in the hope that it will be useful, but WITHOUT

+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public

+// License (COPYING.txt) for more details.

+//

+// You should have received a copy of the GNU Lesser General Public License

+// along with this library; if not, write to the Free Software Foundation,

+// Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

+//

+// The developer's email is jlbezigvins@gmzigail.com (for great email, take

+// off every 'zig'.)

+//

+

+#include <fstream>

+

+#include <noise/interp.h>

+#include <noise/mathconsts.h>

+

+#include "noiseutils.h"

+

+using namespace noise;

+using namespace noise::model;

+using namespace noise::module;

+

+// Bitmap header size.

+const int BMP_HEADER_SIZE = 54;

+

+// Direction of the light source, in compass degrees (0 = north, 90 = east,

+// 180 = south, 270 = east)

+const double DEFAULT_LIGHT_AZIMUTH = 45.0;

+

+// Amount of contrast between light and dark areas.

+const double DEFAULT_LIGHT_CONTRAST  =  1.0;

+

+// Elevation of the light source above the horizon, in degrees (0 = on

+// horizon, 90 = directly overhead)

+const double DEFAULT_LIGHT_ELEVATION = 45.0;

+

+//////////////////////////////////////////////////////////////////////////////

+// Miscellaneous functions

+

+namespace noise

+{

+

+  namespace utils

+  {

+

+    // Performs linear interpolation between two 8-bit channel values.

+    inline noise::uint8 BlendChannel (const uint8 channel0,

+      const uint8 channel1, float alpha)

+    {

+      float c0 = (float)channel0 / 255.0;

+      float c1 = (float)channel1 / 255.0;

+      return (noise::uint8)(((c1 * alpha) + (c0 * (1.0f - alpha))) * 255.0f);

+    }

+

+    // Performs linear interpolation between two colors and stores the result

+    // in out.

+    inline void LinearInterpColor (const Color& color0, const Color& color1,

+      float alpha, Color& out)

+    {

+      out.alpha = BlendChannel (color0.alpha, color1.alpha, alpha);

+      out.blue  = BlendChannel (color0.blue , color1.blue , alpha);

+      out.green = BlendChannel (color0.green, color1.green, alpha);

+      out.red   = BlendChannel (color0.red  , color1.red  , alpha);

+    }

+

+    // Unpacks a floating-point value into four bytes.  This function is

+    // specific to Intel machines.  A portable version will come soon (I

+    // hope.)

+    inline noise::uint8* UnpackFloat (noise::uint8* bytes, float value)

+    {

+      noise::uint8* pBytes = (noise::uint8*)(&value);

+      bytes[0] = *pBytes++;

+      bytes[1] = *pBytes++;

+      bytes[2] = *pBytes++;

+      bytes[3] = *pBytes++;

+      return bytes;

+    }

+

+    // Unpacks a 16-bit integer value into two bytes in little endian format.

+    inline noise::uint8* UnpackLittle16 (noise::uint8* bytes,

+      nois