Merge pull request #148 from matthew-hennefarth/vector-colormap-normalize

Quiver/Quiver3 Colormap and Normalize

Author: alandefreitas

CMakeLists.txt

@@ -128,4 +128,4 @@ if (BUILD_INSTALLER AND BUILD_PACKAGE)
 
     # Always include CPack at last
     include(CPack)
-endif ()
+endif ()

README.md

@@ -14,4 +14,6 @@ add_executable(example_quiver_5 quiver_5.cpp)
 target_link_libraries(example_quiver_5 PUBLIC matplot)
 
 
+add_executable(example_quiver_6 quiver_6.cpp)
+target_link_libraries(example_quiver_6 PUBLIC matplot)
 

docs/examples/vector_fields/quiver/quiver_6.svg

@@ -17,4 +17,4 @@ int main() {
 
     show();
     return 0;
-}
+}

docs/examples/vector_fields/quiver/quiver_6_thumb.png

@@ -0,0 +1,20 @@
+#include <cmath>
+#include <matplot/matplot.h>
+
+int main() {
+    using namespace matplot;
+    auto [x, y] = meshgrid(iota(-2.5, 0.25, 2.5), iota(-2.5, 0.25, 2.5));
+    vector_2d u =
+        transform(x, y, [](double x, double y) { return cos(x) * sin(x + y); });
+    vector_2d v =
+        transform(x, y, [](double x, double y) { return sin(y) * cos(x + y); });
+
+    vector_2d m =
+        transform(u, v, [](double u, double v) { return sqrt(u * u + v * v); });
+
+    quiver(x, y, u, v, m, 0.2)->normalize(true).line_width(1.5);
+
+    colormap(palette::jet());
+    show();
+    return 0;
+}

docs/examples/vector_fields/quiver3/quiver3_2.svg

@@ -1,5 +1,6 @@
 add_executable(example_quiver3_1 quiver3_1.cpp)
 target_link_libraries(example_quiver3_1 PUBLIC matplot)
 
-
+add_executable(example_quiver3_2 quiver3_2.cpp)
+target_link_libraries(example_quiver3_2 PUBLIC matplot)