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[blobs.git] / src / world / Planet.hpp

diff --git a/src/world/Planet.hpp b/src/world/Planet.hpp
index 6106ccf06aa8a770d5928b4e1def95a1c8463a7c..c109934d40e012989cfc6b806610df8821213327 100644 (file)
--- a/src/world/Planet.hpp
+++ b/src/world/Planet.hpp
@@ -1,31 +1,39 @@
 #ifndef BLOBS_WORLD_PLANET_HPP_
 #define BLOBS_WORLD_PLANET_HPP_
 
+#include "Body.hpp"
+
+#include "Set.hpp"
 #include "Tile.hpp"
+#include "../graphics/SimpleVAO.hpp"
+#include "../math/glm.hpp"
 
 #include <cassert>
 #include <memory>
+#include <vector>
+#include <GL/glew.h>
 
 
 namespace blobs {
 namespace world {
 
-struct Tile;
+class TileType;
 
-/// A planet has six surfaces, numbered 0 to 5, each with tiles from
-/// +radius to -radius.
-class Planet {
+/// A planet has six surfaces, numbered 0 to 5, each filled with
+/// sidelength² tiles.
+class Planet
+: public Body {
 
 public:
-       explicit Planet(int radius);
+       explicit Planet(int sidelength);
        ~Planet();
 
-       Planet(Planet &&);
-       Planet &operator =(Planet &&);
-
        Planet(const Planet &) = delete;
        Planet &operator =(const Planet &) = delete;
 
+       Planet(Planet &&) = delete;
+       Planet &operator =(Planet &&) = delete;
+
 public:
        /// Get the tile at given surface and coordinates.
        Tile &TileAt(int surface, int x, int y) {
@@ -35,41 +43,68 @@ public:
                return tiles[IndexOf(surface, x, y)];
        }
 
+       const TileType &TypeAt(int surface, int x, int y) const;
+
        /// Convert coordinates into a tile index.
        int IndexOf(int surface, int x, int y) const {
                assert(0 <= surface && surface <= 5);
-               assert(-radius <= x && x <= radius);
-               assert(-radius <= y && y <= radius);
-               return surface * SurfaceArea() + ToOffset(y) * SideLength() + ToOffset(x);
-       }
-       /// Convert coordinate into offset
-       int ToOffset(int c) const {
-               return c + radius;
-       }
-       /// The "radius" of the planet.
-       int Radius() const {
-               return radius;
+               assert(0 <= x && x < sidelength);
+               assert(0 <= y && y < sidelength);
+               return surface * TilesPerSurface() + y * SideLength() + x;
        }
        /// The length of the side of each surface.
        int SideLength() const {
-               return 2 * radius + 1;
+               return sidelength;
        }
-       /// The area (or number of tiles) of one surface
-       int SurfaceArea() const {
+       /// The number of tiles of one surface.
+       int TilesPerSurface() const {
                return SideLength() * SideLength();
        }
-       /// Total area of all surfaces combined.
-       int TotalArea() const {
-               return 6 * SurfaceArea();
+       /// Total number of tiles of all surfaces combined.
+       int TilesTotal() const {
+               return 6 * TilesPerSurface();
        }
 
+       double TileToPosition(int t) const noexcept { return double(t) - Radius(); }
+       int PositionToTile(double p) const noexcept { return int(p + Radius()); }
+
+       // tile coordinates of position on surface
+       glm::ivec2 SurfacePosition(int surface, const glm::dvec3 &) const noexcept;
+       // height of point over surface
+       double SurfaceElevation(int surface, const glm::dvec3 &) const noexcept;
+       // center point of tile on surface at elevation
+       glm::dvec3 TileCenter(int surface, int x, int y, double elevation = 0.0) const noexcept;
+
+       static glm::dvec3 SurfaceNormal(int srf) noexcept {
+               glm::dvec3 nrm(0.0);
+               nrm[(srf + 2) % 3] = srf < 3 ? 1.0 : -1.0;
+               return nrm;
+       }
+       static glm::dmat3 SurfaceOrientation(int srf) noexcept {
+               glm::dmat3 mat(0.0);
+               mat[(srf + 0) % 3][0] = 1.0;
+               mat[(srf + 2) % 3][1] = srf < 3 ? 1.0 : -1.0;
+               mat[(srf + 1) % 3][2] = srf < 3 ? 1.0 : -1.0;
+               return mat;
+       }
+
+       void BuildVAO(const Set<TileType> &);
+       void Draw(app::Assets &, graphics::Viewport &) override;
+
 private:
-       int radius;
-       std::unique_ptr<Tile []> tiles;
+       int sidelength;
+       std::vector<Tile> tiles;
+
+       struct Attributes {
+               glm::vec3 position;
+               glm::vec3 tex_coord;
+       };
+       std::unique_ptr<graphics::SimpleVAO<Attributes, unsigned int>> vao;
 
 };
 
-void GenerateTest(Planet &);
+void GenerateEarthlike(const Set<TileType> &, Planet &) noexcept;
+void GenerateTest(const Set<TileType> &, Planet &) noexcept;
 
 }
 }