first commit

objects/shapes/vp_rect.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <tuple>
+
+#include "vp_point.h"
+#include "vp_size.h"
+
+namespace vp_objects {
+    // rect in 2-dims coordinate system
+    class vp_rect {
+    private:
+        /* data */
+    public:
+        vp_rect() = default;
+        vp_rect(int x, int y, int width, int height);
+        vp_rect(vp_point left_top, vp_size wh);
+        ~vp_rect();
+
+        int x;
+        int y;
+        int width;
+        int height;
+
+        // get center point of the rect
+        vp_point center();
+
+        // get track point of the rect
+        // track point is used to locate the target(represented by the rect)
+        vp_point track_point();
+
+        // calculate the iou with another rect
+        float iou_with(const vp_rect & rect);
+
+        // check if the rect contains a point
+        bool contains(const vp_point & p);
+    };
+
+}