feat: establish reproducible FreeCAD web compatibility baseline

native/camotics-wasm/include/cbang/geom/Rectangle.h

@@ -0,0 +1,56 @@
+#pragma once
+
+#include <algorithm>
+#include <cmath>
+
+namespace cb {
+  class Vector3D {
+    double values[3];
+
+  public:
+    Vector3D(double value = 0) : values{value, value, value} {}
+    Vector3D(double x, double y, double z) : values{x, y, z} {}
+
+    double &operator[](unsigned index) {return values[index];}
+    double operator[](unsigned index) const {return values[index];}
+    double x() const {return values[0];}
+    double y() const {return values[1];}
+    double z() const {return values[2];}
+
+    Vector3D operator+(const Vector3D &other) const {
+      return Vector3D(x() + other.x(), y() + other.y(), z() + other.z());
+    }
+    Vector3D operator-(const Vector3D &other) const {
+      return Vector3D(x() - other.x(), y() - other.y(), z() - other.z());
+    }
+    Vector3D operator*(double scalar) const {
+      return Vector3D(x() * scalar, y() * scalar, z() * scalar);
+    }
+    Vector3D &operator*=(const Vector3D &other) {
+      values[0] *= other.x();
+      values[1] *= other.y();
+      values[2] *= other.z();
+      return *this;
+    }
+    double dot(const Vector3D &other) const {
+      return x() * other.x() + y() * other.y() + z() * other.z();
+    }
+    double distance(const Vector3D &other) const {
+      const Vector3D delta = *this - other;
+      return std::sqrt(delta.dot(delta));
+    }
+  };
+
+  class Rectangle3D {
+    Vector3D minimum;
+    Vector3D maximum;
+
+  public:
+    Rectangle3D() = default;
+    Rectangle3D(const Vector3D &minimum, const Vector3D &maximum) :
+      minimum(minimum), maximum(maximum) {}
+
+    const Vector3D &getMin() const {return minimum;}
+    const Vector3D &getMax() const {return maximum;}
+  };
+}