C code:

• Renamed AABB to AABB3
• Added AABB2
• Put common code for intersections in ray2.c into a separate function kmLine2WithLineIntersection, that finds the intersection point, but also returns the "factor" values, so it can be checked if we are looking for a two segment intersection, an infinite ray to segment or whatever C++ code:
• Added the AABB2 class
• Added a quad class (non axis aligned box)
• Added the unary minus operator to vec*.h
• Added the BoundVec2 class : ( this is subject to be changed : for now the main reason to use this name instead of "ray" is for comparisons, and when moving to 3d, this class can define a ray, a line, or a plane , depending on its interpretation )

Added linear interpolation for vectors and also for scalars. Also fixed a couple of return values that were giving errors in VS2010. Removed unnnecessary temp variable in kmVec4Normalize.

• add all functions for kazmath/.h (except kazmath/GL/.h)
• lkazmath.km* for all functions
• use lkazmath._New or lkazmath._NewWithArray or lkazmath.*NewWithTbl to create a object (struct in C)
• method ToArray, ToTbl for vec_, mat_
• OOP support (without prefix km${StructName}), for example

mat3 = lkazmath.kmMat3New()
mat3:ToArray()

or you can use

lkazmath.kmMat3ToArray(mat3)

• alter args(such as kmScalar *out are removed from function params), see lua__kmMat4RotationToAxisAngle, lua__kmLine2WithLineIntersection

see More...

Fixed errors that I did not dectect when compiling the library, and found them when using it.

Also changed the overloaded operators so dot and cross product are no longer used for operator*.

Unfortunately, the current GL stack implementation crashes when calling it from different threads using multiple OpenGL contexts. As I required this specific functionality, I forked kazmath and implemented a TLS based context switch for the stack module (see http://github.com/starbugs/kazmath).

With my modifications, the only thing people have to do when they switch GL contexts is to call kmGLSetCurrentContext(void *) providing a reference to some external context representation that is constant for the lifecycle of a given real GL context. kazmath will then provide a stack for each context automatically (without any changes to the stack interface). My modifications merely require linking to libpthread.

Some background info: I am authoring a GL-based UI framework for iOS/Mac OS X which uses kazmath for most of the math and vector stuff (http://github.com/starbugs/icedcoffee). My modifications have been tested by a very small group of people currently experimenting with my framework -- no issues so far.

Anyway, I thought I just give you a ping and ask whether you're interested in pulling these changes? Maybe they are beneficial to others...

Big thanks for the great library!

Tobias

I wanted to know what is the following variable used for.

File ray2.c on line 31:

• 31: kmScalar ub = ((x2 - x1) * (y1 - y3) - (y2 - y1) * (x1 - x3)) / denom;

It is declared and initialized but never used.

on lines 33,34

• 33: kmScalar x = x1 + ua * (x2 - x1);
• 34: kmScalar y = y1 + ua * (y2 - y1);

ua variable is used two times.

Was the ua variable on line 34 meant to be ub?

Hi.

Im getting an error while building the library per instructions.

sbr@hiltrud ~/Code/kazmath/build $ make
Scanning dependencies of target kazmath
[  5%] Building C object kazmath/CMakeFiles/kazmath.dir/mat4.c.o
[ 11%] Building C object kazmath/CMakeFiles/kazmath.dir/mat3.c.o
[ 16%] Building C object kazmath/CMakeFiles/kazmath.dir/plane.c.o
[ 22%] Building C object kazmath/CMakeFiles/kazmath.dir/vec4.c.o
[ 27%] Building C object kazmath/CMakeFiles/kazmath.dir/quaternion.c.o
[ 33%] Building C object kazmath/CMakeFiles/kazmath.dir/vec2.c.o
[ 38%] Building C object kazmath/CMakeFiles/kazmath.dir/vec3.c.o
[ 44%] Building C object kazmath/CMakeFiles/kazmath.dir/utility.c.o
[ 50%] Building C object kazmath/CMakeFiles/kazmath.dir/aabb2.c.o
[ 55%] Building C object kazmath/CMakeFiles/kazmath.dir/aabb3.c.o
[ 61%] Building C object kazmath/CMakeFiles/kazmath.dir/ray2.c.o
[ 66%] Building C object kazmath/CMakeFiles/kazmath.dir/ray3.c.o
[ 72%] Building C object kazmath/CMakeFiles/kazmath.dir/GL/mat4stack.c.o
[ 77%] Building C object kazmath/CMakeFiles/kazmath.dir/GL/matrix.c.o
[ 83%] Linking C static library libkazmath.a
[ 83%] Built target kazmath
[ 88%] Generating ../../tests/main.cpp
Scanning dependencies of target kazmath_tests
[ 94%] Building CXX object tests/CMakeFiles/kazmath_tests.dir/main.cpp.o
In file included from /home/sbr/Code/kazmath/tests/main.cpp:5:0:
/home/sbr/Code/kazmath/tests/test_quaternion.h: In member function ‘void TestQuaternion::test_quaternion_slerp_edge_case()’:
/home/sbr/Code/kazmath/tests/test_quaternion.h:33:36: error: ‘isnan’ was not declared in this scope
         assert_true(!isnan(result.x));
                                    ^
/home/sbr/Code/kazmath/tests/kaztest/kaztest.h:15:43: note: in definition of macro ‘assert_true’
 #define assert_true(actual) _assert_true((actual), __FILE__, __LINE__)
                                           ^
/home/sbr/Code/kazmath/tests/test_quaternion.h:33:36: note: suggested alternative:
         assert_true(!isnan(result.x));
                                    ^
/home/sbr/Code/kazmath/tests/kaztest/kaztest.h:15:43: note: in definition of macro ‘assert_true’
 #define assert_true(actual) _assert_true((actual), __FILE__, __LINE__)
                                           ^
In file included from /usr/include/c++/5/random:38:0,
                 from /usr/include/c++/5/bits/stl_algo.h:66,
                 from /usr/include/c++/5/algorithm:62,
                 from /home/sbr/Code/kazmath/tests/kaztest/kaztest.h:9,
                 from /home/sbr/Code/kazmath/tests/main.cpp:5:
/usr/include/c++/5/cmath:641:5: note:   ‘std::isnan’
     isnan(_Tp __x)
     ^
tests/CMakeFiles/kazmath_tests.dir/build.make:76: recipe for target 'tests/CMakeFiles/kazmath_tests.dir/main.cpp.o' failed
make[2]: *** [tests/CMakeFiles/kazmath_tests.dir/main.cpp.o] Error 1
CMakeFiles/Makefile2:140: recipe for target 'tests/CMakeFiles/kazmath_tests.dir/all' failed
make[1]: *** [tests/CMakeFiles/kazmath_tests.dir/all] Error 2
Makefile:160: recipe for target 'all' failed
make: *** [all] Error 2

Im using gcc 5.4.0. on Ubuntu.

hi~ @Kazade I forked this lua-binding

so far so good.

• add all functions for kazmath/.h (except kazmath/GL/.h)
• lkazmath.km* for all functions
• use lkazmath._New or lkazmath._NewWithArray or lkazmath.*NewWithTbl to create a object (struct in C)
• method ToArray, ToTbl for vec_, mat_
• OOP support (without prefix km${StructName}), for example

mat3 = lkazmath.kmMat3New()
mat3:ToArray()

or you can use

lkazmath.kmMat3ToArray(mat3)

• alter args(such as kmScalar *out are removed from function params), see lua__kmMat4RotationToAxisAngle, lua__kmLine2WithLineIntersection

... in .c , .h files and kazmath.config so it will compile in C89 (--pedantic) and changed one instance (kazmath/quaternion.c) of a block /* ... */ comment to #if 0 ... #endif so fixing the contained line comments wouldn't break anything

I'm probably going to contribute some collision/response related functions to kazmath somewhere in near future, and introduce new types such as kmOBB, kmEllipse, kmTriangle, ...

You can see video of the math in action here: http://www.youtube.com/watch?v=HYW2lI3alG0

You can see the current code that is still unfinished and some math is broken here (at top of file everything prefixed with km): https://github.com/Cloudef/colhck/blob/master/test/coltest.c

Though, I have question regarding kmAABBExtent, will this kind of type be pulled in or should the original kmAABB be replaced?

The reason for introducing kmAABBExtent is reduced memory usage.

Had to rename the max and min functions due to conflicts with other libraries and used the prefix km as in all other functions.

Added component wise multiplication and division.

Also added operators for the c++ classes ( += , -= , *=, /= ). From my point of view, the overloaded operator * in the C++ that does the dot product should perform the component wise multiplication, more in line with what happens in GLSL, and use a static dot function inside the class. But, I guess that making that change would break code using the library, and I didn't touch it.

Also moved the .h files for kazmathxx outside the src directory. That is weird when you have to make an :

include <kathmath/src/vec2.h>

There is a small typo in lua/README.md.

Should read example rather than exmaple.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

to be honest not sure if this is even an issue?

kmMat4* kmMat4Scaling(kmMat4* pOut, const kmScalar x, const kmScalar y, kmScalar z) kmMat4* kmMat4Translation(kmMat4* pOut, const kmScalar x, kmScalar y, const kmScalar z)

const missing on scaling z and translation y

there may be others

'make' command error: "isnan was not declared in this scope"

Fix could be adding the line: using std::isnan; right after the includes in the same file.

Steps to reproduce:

git clone https://github.com/Kazade/kazmath.git
cd kazmath
mkdir build
cd build
cmake ..
make

produces:

/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:53:34: warning: variadic
      templates are a C++11 extension [-Wc++11-extensions]
    template<typename T, typename... Args>
                                 ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:60:34: warning: variadic
      templates are a C++11 extension [-Wc++11-extensions]
    template<typename T, typename... Args>
                                 ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:96:5: error: exception
      specification of overriding function is more lax than base version
    ~AssertionError() noexcept (true) {
    ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/stdexcept:76:13: note:
      overridden virtual function is here
    virtual ~logic_error() _NOEXCEPT;
            ^
In file included from /Users/jamiltron/opt/kazmath/tests/main.cpp:5:
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:96:22: error: expected ';'
      at end of declaration list
    ~AssertionError() noexcept (true) {
                     ^
                     ;
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:85:9: error: member
      initializer 'file' does not name a non-static data member or base class
        file(""),
        ^~~~~~~~
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:91:9: error: member
      initializer 'file' does not name a non-static data member or base class
        file(file_and_line.first),
        ^~~~~~~~~~~~~~~~~~~~~~~~~
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:121:13: warning: 'auto'
      type specifier is a C++11 extension [-Wc++11-extensions]
            auto file_and_line = std::make_pair(file, line);
            ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:129:13: warning: 'auto'
      type specifier is a C++11 extension [-Wc++11-extensions]
            auto file_and_line = std::make_pair(file, line);
            ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:137:13: warning: 'auto'
      type specifier is a C++11 extension [-Wc++11-extensions]
            auto file_and_line = std::make_pair(file, line);
            ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:146:13: warning: 'auto'
      type specifier is a C++11 extension [-Wc++11-extensions]
            auto file_and_line = std::make_pair(file, line);
            ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:154:13: warning: 'auto'
      type specifier is a C++11 extension [-Wc++11-extensions]
            auto file_and_line = std::make_pair(file, line);
            ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:162:13: warning: 'auto'
      type specifier is a C++11 extension [-Wc++11-extensions]
            auto file_and_line = std::make_pair(file, line);
            ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:171:13: warning: 'auto'
      type specifier is a C++11 extension [-Wc++11-extensions]
            auto file_and_line = std::make_pair(file, line);
            ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:293:41: error: a space is
      required between consecutive right angle brackets (use '> >')
    std::vector<std::shared_ptr<TestCase>> instances_;
                                        ^~
                                        > >
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:189:29: warning:
      range-based for loop is a C++11 extension [-Wc++11-extensions]
        for(std::string name: names) {
                            ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:193:22: warning:
      range-based for loop is a C++11 extension [-Wc++11-extensions]
        for(U& method: methods) {
                     ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:194:47: error: no member
      named 'bind' in namespace 'std'; did you mean 'find'?
            std::function<void()> func = std::bind(method, dynamic_cast<...
                                         ~~~~~^~~~
                                              find
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:862:1: note:
      'find' declared here
find(_InputIterator __first, _InputIterator __last, const _Tp& __value_)
^
In file included from /Users/jamiltron/opt/kazmath/tests/main.cpp:5:
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:195:30: error: expected
      expression
            tests_.push_back([=]() {
                             ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:209:9: warning: 'auto' type
      specifier is a C++11 extension [-Wc++11-extensions]
        auto new_tests = tests_;
        ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:210:9: warning: 'auto' type
      specifier is a C++11 extension [-Wc++11-extensions]
        auto new_names = names_;
        ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:226:40: warning:
      range-based for loop is a C++11 extension [-Wc++11-extensions]
        for(std::function<void ()> test: new_tests) {
                                       ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:243:23: error: no member
      named 'file' in 'AssertionError'
                if(!e.file.empty()) {
                    ~ ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:244:50: error: no member
      named 'file' in 'AssertionError'
                    std::cout << "        " << e.file << ":" << e.line <...
                                               ~ ^
/Users/jamiltron/opt/kazmath/tests/kaztest/kaztest.h:246:41: error: no member
      named 'file' in 'AssertionError'
                    std::ifstream ifs(e.file);
                                      ~ ^
/Users/jamiltron/opt/kazmath/tests/main.cpp:27:43: error: expected expression
        std::vector<void (TestAABB::*)()>({&TestAABB::test_aabb_expand_t...
                                          ^
/Users/jamiltron/opt/kazmath/tests/main.cpp:28:9: error: expected expression
        {"TestAABB::test_aabb_expand_to_contain", "TestAABB::test_aabb_c...
        ^
/Users/jamiltron/opt/kazmath/tests/main.cpp:32:43: error: expected expression
        std::vector<void (TestMat3::*)()>({&TestMat3::test_mat3_inverse...
                                          ^
/Users/jamiltron/opt/kazmath/tests/main.cpp:33:9: error: expected expression
        {"TestMat3::test_mat3_inverse", "TestMat3::test_mat3_transpose"...
        ^
/Users/jamiltron/opt/kazmath/tests/main.cpp:37:43: error: expected expression
        std::vector<void (TestMat4::*)()>({&TestMat4::test_mat4_inverse...
                                          ^
/Users/jamiltron/opt/kazmath/tests/main.cpp:38:9: error: expected expression
        {"TestMat4::test_mat4_inverse", "TestMat4::test_mat4_and_quatern...
        ^
/Users/jamiltron/opt/kazmath/tests/main.cpp:42:44: error: expected expression
        std::vector<void (TestPlane::*)()>({&TestPlane::test_plane_extra...
                                           ^
/Users/jamiltron/opt/kazmath/tests/main.cpp:43:9: error: expected expression
        {"TestPlane::test_plane_extraction_from_matrix", "TestPlane::tes...
        ^
/Users/jamiltron/opt/kazmath/tests/main.cpp:47:49: error: expected expression
        std::vector<void (TestQuaternion::*)()>({&TestQuaternion::test_q...
                                                ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
14 warnings and 20 errors generated.
make[2]: *** [tests/CMakeFiles/kazmath_tests.dir/main.cpp.o] Error 1
make[1]: *** [tests/CMakeFiles/kazmath_tests.dir/all] Error 2
make: *** [all] Error 2

Currently, trying to build on Windows using the Visual C++ compiler bundled with Visual Studio causes the following error (plus a host of warnings concerning uninitialized variables):

Cannot open include file: 'pthread.h': No such file or directory : matrix.c

I am trying to use Kazmath for my engine, but I am having issues with incorrect lookAt, so I launched the test and I got this :

./kazmath_tests

1.000000 0.000000 0.000000

1.000000 0.000000 0.000000 /home/gpinchon/Bureau/projects/OpenGL/kazmath/tests/test_mat4.cpp:66: error: Failure in test_mat4_and_quaternion_consistency: kmMat4AreEqual(&tmp, &mat) FAILURE: 1 out of 37 tests failed (1 failures). Test time: 0.00 seconds.