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Bezier is a single header only C++ library for Bezier curve calculations and manipulations.

License: MIT License

CMake 1.38% C++ 98.36% Shell 0.27%

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compile error

bezier/include/bezier/bezier.h:62:9: error: array must be initialized with a brace-enclosed initializer

readme slip of the pen

p = cubicBezier.valueAt(0); // (120, 60)
should be
p = cubicBezier.valueAt(0); // (120, 160)

Tests won't compile.

Tests won't compile!
(I am new to C++. Am I doing something wrong?)

nacl@laptop:~/thinz/bezier-master$ cmake .
-- The C compiler identification is GNU 10.1.0
-- The CXX compiler identification is GNU 10.1.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/nacl/thinz/bezier-master
nacl@laptop:~/thinz/bezier-master$ make
Scanning dependencies of target derivative-tests
[ 25%] Building CXX object tests/CMakeFiles/derivative-tests.dir/derivative-tests.cpp.o
In file included from /home/nacl/thinz/bezier-master/tests/derivative-tests.cpp:22:
/home/nacl/thinz/bezier-master/include/bezier.h: In member function ‘float Bezier::Vec2::operator[](size_t) const’:
/home/nacl/thinz/bezier-master/include/bezier.h:255:29: error: ‘stderr’ was not declared in this scope
  255 |                     fprintf(stderr, "Erroneous axis: " BEZIER_SIZE_T_FORMAT ". Returning 0.\n", axis);
      |                             ^~~~~~
/home/nacl/thinz/bezier-master/include/bezier.h:28:1: note: ‘stderr’ is defined in header ‘<cstdio>’; did you forget to ‘#include <cstdio>’?
   27 | #include <array>
  +++ |+#include <cstdio>
   28 | 
/home/nacl/thinz/bezier-master/include/bezier.h:255:21: error: ‘fprintf’ was not declared in this scope; did you mean ‘rintf’?
  255 |                     fprintf(stderr, "Erroneous axis: " BEZIER_SIZE_T_FORMAT ". Returning 0.\n", axis);
      |                     ^~~~~~~
      |                     rintf
/home/nacl/thinz/bezier-master/include/bezier.h: In member function ‘float& Bezier::Vec2::operator[](size_t)’:
/home/nacl/thinz/bezier-master/include/bezier.h:270:29: error: ‘stderr’ was not declared in this scope
  270 |                     fprintf(stderr, "Erroneous axis: " BEZIER_SIZE_T_FORMAT ". Returning x.\n", axis);
      |                             ^~~~~~
/home/nacl/thinz/bezier-master/include/bezier.h:270:29: note: ‘stderr’ is defined in header ‘<cstdio>’; did you forget to ‘#include <cstdio>’?
/home/nacl/thinz/bezier-master/include/bezier.h:270:21: error: ‘fprintf’ was not declared in this scope; did you mean ‘rintf’?
  270 |                     fprintf(stderr, "Erroneous axis: " BEZIER_SIZE_T_FORMAT ". Returning x.\n", axis);
      |                     ^~~~~~~
      |                     rintf
/home/nacl/thinz/bezier-master/include/bezier.h: At global scope:
/home/nacl/thinz/bezier-master/include/bezier.h:632:19: error: declaration of template parameter ‘N’ shadows template parameter
  632 |         template <size_t N>
      |                   ^~~~~~
/home/nacl/thinz/bezier-master/include/bezier.h:628:15: note: template parameter ‘N’ declared here
  628 |     template <size_t N>
      |               ^~~~~~
tests/CMakeFiles/derivative-tests.dir/build.make:62: recipe for target 'tests/CMakeFiles/derivative-tests.dir/derivative-tests.cpp.o' failed
make[2]: *** [tests/CMakeFiles/derivative-tests.dir/derivative-tests.cpp.o] Error 1
CMakeFiles/Makefile2:87: recipe for target 'tests/CMakeFiles/derivative-tests.dir/all' failed
make[1]: *** [tests/CMakeFiles/derivative-tests.dir/all] Error 2
Makefile:94: recipe for target 'all' failed
make: *** [all] Error 2

When adding #include <cstdio> to bezier.h :

nacl@laptop:~/thinz/bezier-master$ make
Scanning dependencies of target derivative-tests
[ 25%] Building CXX object tests/CMakeFiles/derivative-tests.dir/derivative-tests.cpp.o
In file included from /home/nacl/thinz/bezier-master/tests/derivative-tests.cpp:22:
/home/nacl/thinz/bezier-master/include/bezier.h:633:19: error: declaration of template parameter ‘N’ shadows template parameter
  633 |         template <size_t N>
      |                   ^~~~~~
/home/nacl/thinz/bezier-master/include/bezier.h:629:15: note: template parameter ‘N’ declared here
  629 |     template <size_t N>
      |               ^~~~~~
tests/CMakeFiles/derivative-tests.dir/build.make:62: recipe for target 'tests/CMakeFiles/derivative-tests.dir/derivative-tests.cpp.o' failed
make[2]: *** [tests/CMakeFiles/derivative-tests.dir/derivative-tests.cpp.o] Error 1
CMakeFiles/Makefile2:87: recipe for target 'tests/CMakeFiles/derivative-tests.dir/all' failed
make[1]: *** [tests/CMakeFiles/derivative-tests.dir/all] Error 2
Makefile:94: recipe for target 'all' failed
make: *** [all] Error 2

Call to non-constexpr function error when Bezier::Bezier<VARIABLE> initialization

I would like to calculate Bezier in the runtime as:
Bezier::Bezier<path.rows()> cubicBezier({ }); where path.rows() is the number of 2D point. However, it does not allow me to do so. Could you help about that issue? Can't we assign this in the runtime?
Thanks in advance

Hvordan Finner Jeg Midtpunkten?

Hei Øystein!

Unnskyld, jeg vet dette er et gammelt prosjekt, man hvordan finner jeg midpointten av kurven?

If this functionality is not yet available, I'll figure it out and send a PR!

(Please excuse my Norsk, I am still learning!)
Rich

Extraction of points on the curve

I created a cubic Bézier curve, how should I extract the points on the curve, I want to use it for path planning

Add documentation?

It doesn't seem like there is any documentation for this library. I guess I'll just try to figure it out, but it would be great if you could add some documentation.

workflow problem matcher

I see you have created a workflow file. This is very good :)
May I suggest you add a problem matcher. Then warnings will show in PRs like this https://github.com/githubdoe/DFTFringe/pull/60/files

For GCC this one works great https://github.com/ammaraskar/gcc-problem-matcher but you should probably have one per compiler

very helpful， thanks a lot!

👍👍👍

rule of 3/5/0

your code is used in https://github.com/githubdoe/DFTFringe and I'm currently trying to fix all warning in the code.

When using newer compiler, I get following warning :
warning: implicitly-declared 'Bezier::Vec2& Bezier::Vec2::operator=(const Bezier::Vec2&)' is deprecated [-Wdeprecated-copy]
This is because the code does not respect the rule of 3/5/0
https://en.cppreference.com/w/cpp/language/rule_of_three

If you consider a fix I will happily integrate it to our code

how to find the 30% of the total line curve length.

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