Initial commit.

.github/workflows/build.yml

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+name: build
+on: [push, pull_request]
+jobs:
+  #windows:
+  #  runs-on: windows-latest
+  #  defaults:
+  #    run:
+  #      shell: msys2 {0}
+  #  steps:
+  #    - uses: actions/checkout@v4
+  #    - uses: msys2/setup-msys2@v2
+  #      with:
+  #        msystem: MINGW64
+  #        update: true
+  #        install: make mingw-w64-x86_64-gcc mingw-w64-x86_64-perl-win32-tieregistry
+  #    - name: Build and Test
+  #      run: |
+  #        : # Fix Perl locale issue
+  #        export LC_ALL=en_US.utf8
+  #        : # Fix Perl search path/Win32::TieRegistry version issue
+  #        dir=D:/a/_temp/msys64/mingw64/lib/perl5/site_perl
+  #        mkdir -p $dir/5.38.2/Win32
+  #        ln $dir/5.32.1/Win32/TieRegistry.pm $dir/5.38.2/Win32/TieRegistry.pm
+  #        : # Downgrade zlib version to match LuaLaTex
+  #        pkg=mingw-w64-x86_64-zlib
+  #        ver=1.3-1
+  #        file=$pkg-$ver-any.pkg.tar.zst
+  #        curl -LO https://repo.msys2.org/mingw/mingw64/$file
+  #        pacman -U --noconfirm $file
+  #        : # Install TeX Live packages
+  #        pacman -S --noconfirm mingw-w64-x86_64-texlive-luatex mingw-w64-x86_64-texlive-latex-extra mingw-w64-x86_64-texlive-fonts-extra
+  #        : # Build and Test
+  #        make -j
+  #macos:
+  #  runs-on: macos-latest
+  #  steps:
+  #    - uses: actions/checkout@v4
+  #    - uses: melusina-org/setup-macports@v1
+  #    - name: Build and Test
+  #      run: |
+  #        sudo port install texlive-luatex texlive-latex-extra texlive-fonts-extra
+  #        make -j
+  linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build and Test
+        run: |
+          sudo apt install texlive-luatex texlive-latex-extra texlive-fonts-extra texlive-xetex texlive-science ghostscript poppler-utils
+          make -j

.gitignore

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+*.o
+*.a
+test/test
+test/build
+test/output

LICENSE

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+MIT License
+
+Copyright 2019-2024 Benjamin L. Reifler
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Makefile

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+PROJNAME := pgfplotter
+CXXVER := 17
+MINMACOSVER := 10.15
+
+LIBNAME := $(shell echo $(PROJNAME) | sed 's/_//g' | tr '[:upper:]' '[:lower:]')
+ifeq ($(OS), Windows_NT)
+    LIBPATH := /mingw64/lib
+    INCLPATH := /mingw64/include
+    OSPRETTY := Windows
+else
+    ifeq ($(shell uname -s), Darwin)
+        OSPRETTY := macOS
+    else
+        OSPRETTY := Linux
+    endif
+    LIBPATH := /usr/local/lib
+    INCLPATH := /usr/local/include
+endif
+OPTIM := 3
+CFLAGS := -O$(OPTIM) -Wall -Wextra -Wno-missing-braces
+ifeq ($(OSPRETTY), macOS)
+    CFLAGS += -mmacosx-version-min=$(MINMACOSVER) -Wunguarded-availability
+else
+    ifeq ($(OSPRETTY), Windows)
+        CFLAGS += -Wno-cast-function-type
+    endif
+endif
+CXXFLAGS := -std=c++$(CXXVER) $(CFLAGS) -Wold-style-cast
+ifeq ($(OSPRETTY), macOS)
+    CXXFLAGS += -Wno-string-plus-int
+else
+    ifeq ($(OSPRETTY), Windows)
+        CXXFLAGS += -Wno-deprecated-copy
+    endif
+endif
+ARFLAGS := -rcs
+
+SRC := $(wildcard *.cpp)
+ifeq ($(OSPRETTY), macOS)
+    ARMOBJ := $(SRC:.cpp=_arm64.o)
+    INTOBJ := $(SRC:.cpp=_x86_64.o)
+else
+    OBJ := $(SRC:.cpp=.o)
+endif
+
+print-% : ; @echo $* = $($*)
+
+.PHONY: test
+default: test
+
+ifeq ($(OSPRETTY), macOS)
+lib$(LIBNAME).a: lib$(LIBNAME)_arm64.a lib$(LIBNAME)_x86_64.a
+	lipo -create -output $@ $^
+
+lib$(LIBNAME)_arm64.a: $(ARMOBJ)
+	$(RM) $@
+	ar $(ARFLAGS) $@ $^
+
+lib$(LIBNAME)_x86_64.a: $(INTOBJ)
+	$(RM) $@
+	ar $(ARFLAGS) $@ $^
+else
+lib$(LIBNAME).a: $(OBJ)
+	$(RM) $@
+	ar $(ARFLAGS) $@ $^
+endif
+
+install: $(PROJNAME) lib$(LIBNAME).a
+	cmp -s $(PROJNAME) $(INCLPATH)/$(PROJNAME) || cp $(PROJNAME) $(INCLPATH)/
+	cmp -s lib$(LIBNAME).a $(LIBPATH)/lib$(LIBNAME).a || cp lib$(LIBNAME).a $(LIBPATH)/
+
+test: lib$(LIBNAME).a
+	$(MAKE) -C test
+	test/test
+
+%_arm64.o: %.cpp
+	$(CXX) -arch arm64 -c -o $@ $< $(CXXFLAGS)
+
+%_x86_64.o: %.cpp
+	$(CXX) -arch x86_64 -c -o $@ $< $(CXXFLAGS)
+
+%.o: %.cpp
+	$(CXX) -c -o $@ $< $(CXXFLAGS)
+
+clean:
+	$(RM) *.o *.a
+	$(MAKE) -C test clean

detect_os.hpp

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+#ifndef PGFPLOTTER_DETECT_OS_HPP
+#define PGFPLOTTER_DETECT_OS_HPP
+
+#if defined(__APPLE__) && defined(__MACH__)
+#if !defined(TARGET_OS_IPHONE) || !TARGET_OS_IPHONE
+#define OS_MACOS
+#else
+static_assert(false, "Failed to detect an acceptable OS (iOS is not supported)."
+    "\n");
+#endif
+#elif defined(_WIN32) || defined(_WIN64)
+#define OS_WINDOWS
+#elif defined(__linux__)
+#define OS_LINUX
+#else
+static_assert(false, "Failed to detect an acceptable OS (no valid macros define"
+    "d).\n");
+#endif
+#if defined(OS_MACOS) || defined(OS_LINUX)
+#define OS_UNIX
+#endif
+
+#endif

mesh_grid.cpp

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+#include "pgfplotter"
+
+std::array<std::vector<double>, 3> pgfplotter::mesh_grid(const std::function<
+    double(double, double)>& f, double xMin, double xMax, double yMin, double
+    yMax, std::size_t res)
+{
+    return mesh_grid(f, xMin, xMax, yMin, yMax, res, res);
+}
+
+std::array<std::vector<double>, 3> pgfplotter::mesh_grid(const std::function<
+    double(double, double)>& f, double xMin, double xMax, double yMin, double
+    yMax, std::size_t xRes, std::size_t yRes)
+{
+    if(!yRes)
+    {
+        yRes = xRes;
+    }
+
+    std::array<std::vector<double>, 3> grid;
+    for(auto& n : grid)
+    {
+        n.resize(xRes*yRes);
+    }
+
+    std::vector<double> x(xRes);
+    std::vector<double> y(yRes);
+    for(std::size_t i = 0; i < xRes; ++i)
+    {
+        x[i] = xMin + i*(xMax - xMin)/(xRes - 1);
+    }
+    for(std::size_t i = 0; i < yRes; ++i)
+    {
+        y[i] = yMin + i*(yMax - yMin)/(yRes - 1);
+    }
+    for(std::size_t i = 0; i < xRes; ++i)
+    {
+        for(std::size_t j = 0; j < yRes; ++j)
+        {
+            grid[0][yRes*i + j] = x[i];
+            grid[1][yRes*i + j] = y[j];
+            grid[2][yRes*i + j] = f(x[i], y[j]);
+        }
+    }
+
+    return grid;
+}