first commit

nodes/ba/vp_ba_crossline_node.h

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+#pragma once
+
+#include <map>
+#include "../vp_node.h"
+#include "../../objects/shapes/vp_point.h"
+#include "../../objects/shapes/vp_line.h"
+#include "../../objects/vp_image_record_control_meta.h"
+#include "../../objects/vp_video_record_control_meta.h"
+
+namespace vp_nodes {
+    // behaviour analysis node for crossline (support multi channels)
+    class vp_ba_crossline_node: public vp_node 
+    {
+    private:
+        // channel -> counter
+        std::map<int, int> all_total_crossline;
+
+        // channel -> line, 1 channel supports only 1 line at most (can be 0, which means no crossline check on this channel)
+        std::map<int, vp_objects::vp_line> all_lines;
+
+        // record params
+        bool need_record_image;
+        bool need_record_video;
+
+        // check if point at one side of line
+        bool at_1_side_of_line(vp_objects::vp_point p, vp_objects::vp_line line);
+    protected:
+        virtual std::shared_ptr<vp_objects::vp_meta> handle_frame_meta(std::shared_ptr<vp_objects::vp_frame_meta> meta) override;
+    public:
+        vp_ba_crossline_node(std::string node_name, 
+                            std::map<int, vp_objects::vp_line> lines,
+                            bool need_record_image = true,
+                            bool need_record_video = false);
+        ~vp_ba_crossline_node();
+
+        std::string to_string() override;
+    };
+}