polygon.h

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#pragma once
 
#include <array>
#include <cstddef>
#include <cstdint>
 
namespace esphome::ld2450 {
 
static constexpr uint8_t MIN_POLYGON_POINTS = 3;
// The most points whose text always fits Home Assistant's 255-character limit: 23 x "-4860,7560" + 22 x ';' = 252
static constexpr uint8_t MAX_POLYGON_POINTS = 23;
// Coordinate limits of the radar detection area, in mm
static constexpr int16_t POLYGON_MIN_X = -4860;
static constexpr int16_t POLYGON_MAX_X = 4860;
static constexpr int16_t POLYGON_MIN_Y = 0;
static constexpr int16_t POLYGON_MAX_Y = 7560;
// Longest point is "-4860,7560;" (11 characters), plus the null terminator
static constexpr size_t POLYGON_STR_SIZE = MAX_POLYGON_POINTS * 11 + 1;
 
struct Point {
  int16_t x;
  int16_t y;
};
 
struct Polygon {
  std::array<Point, MAX_POLYGON_POINTS> points{};
  uint8_t count{0};
 
  bool empty() const { return this->count == 0; }
 
  bool is_valid() const;
 
  bool contains(int16_t x, int16_t y) const;
 
  bool parse(const char *str, size_t len);
 
  void format(char *buf) const;
};
 
// text.py counts on this size
static_assert(sizeof(Polygon) == 94, "Polygon layout changed; update POLYGON_SAVED_BYTES in text.py");
 
}  // namespace esphome::ld2450