Implement bounding boxes with a separate class

[libs/math.git] / source / geometry / shape.h

diff --git a/source/geometry/shape.h b/source/geometry/shape.h
index 528a77ca6d97d42e748bb4a47a17f88508394bfa..bbe255f9054f919792ca748a7c25468b62bfabc8 100644 (file)
--- a/source/geometry/shape.h
+++ b/source/geometry/shape.h
@@ -1,15 +1,26 @@
 #ifndef MSP_GEOMETRY_SHAPE_H_
 #define MSP_GEOMETRY_SHAPE_H_
 
+#include <vector>
+#include <msp/linal/vector.h>
+
 namespace Msp {
 namespace Geometry {
 
 template<typename T, unsigned D>
-class HyperBox;
+class BoundingBox;
 
 template<typename T, unsigned D>
 class Ray;
 
+template<typename T, unsigned D>
+class SurfacePoint;
+
+/**
+Base class and interface for geometric shapes.  Shapes may be bounded or
+unbounded.  They are always considered to be solid, i.e. have a distinct inside
+and an outside.
+*/
 template<typename T, unsigned D>
 class Shape
 {
@@ -20,10 +31,30 @@ public:
 
        virtual Shape *clone() const = 0;
 
-       virtual HyperBox<T, D> get_axis_aligned_bounding_box() const = 0;
-       virtual bool check_intersection(const Ray<T, D> &) const = 0;
+       virtual BoundingBox<T, D> get_axis_aligned_bounding_box() const = 0;
+       virtual bool contains(const LinAl::Vector<T, D> &) const = 0;
+       bool check_intersection(const Ray<T, D> &) const;
+       virtual unsigned get_max_ray_intersections() const = 0;
+       virtual unsigned get_intersections(const Ray<T, D> &, SurfacePoint<T, D> *, unsigned) const = 0;
+       std::vector<SurfacePoint<T, D> > get_intersections(const Ray<T, D> &) const;
 };
 
+template<typename T, unsigned D>
+inline bool Shape<T, D>::check_intersection(const Ray<T, D> &ray) const
+{
+       return get_intersections(ray, 0, 1);
+}
+
+template<typename T, unsigned D>
+inline std::vector<SurfacePoint<T, D> > Shape<T, D>::get_intersections(const Ray<T, D> &ray) const
+{
+       unsigned max_isect = get_max_ray_intersections();
+       std::vector<SurfacePoint<T, D> > points(max_isect);
+       unsigned count = get_intersections(ray, &points[0], max_isect);
+       points.resize(count);
+       return points;
+}
+
 } // namespace Geometry
 } // namespace Msp