coord_frame.hpp

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/* Copyright (c) 2023 Otto Link. Distributed under the terms of the GNU General
   Public License. The full license is in the file LICENSE, distributed with
   this software. */
 
#pragma once
#include <cmath>
#include <map>
#include <vector>
 
#include "highmap/algebra.hpp"
#include "highmap/virtual_array/virtual_array.hpp"
 
namespace hmap
{
 
class CoordFrame
{
public:
  CoordFrame();
 
  CoordFrame(glm::vec2 origin, glm::vec2 size, float rotation_angle);
 
  // Getters
  glm::vec2 get_origin() const
  {
    return this->origin;
  }
 
  glm::vec2 get_size() const
  {
    return this->size;
  }
 
  float get_rotation_angle() const;
 
  // Setters
  void set_origin(glm::vec2 new_origin)
  {
    this->origin = new_origin;
  }
 
  void set_size(glm::vec2 new_size)
  {
    this->size = new_size;
  }
 
  void set_rotation_angle(float new_angle);
 
  // Methods
 
  glm::vec4 compute_bounding_box() const;
 
  float get_heightmap_value_bilinear(const VirtualArray &h,
                                     float               gx,
                                     float               gy,
                                     float fill_value = 0.f) const;
 
  bool is_point_within(float gx, float gy) const;
 
  glm::vec2 map_to_global_coords(float rx, float ry) const;
 
  // relative coords always in [0, 1] x [0, 1] (unit square)
  glm::vec2 map_to_relative_coords(float gx, float gy) const;
 
  float normalized_distance_to_edges(float gx, float gy) const;
 
  float normalized_shape_factor(float gx, float gy) const;
 
private:
  glm::vec2 origin;
  glm::vec2 size;
  float     rotation_angle;
 
  float cos_angle;
  float sin_angle;
};
 
} // namespace hmap