#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:
+ /// surface normal
+ glm::dvec3 NormalAt(const glm::dvec3 &p) const noexcept { return glm::normalize(p); }
+ /// height over surface
+ double ElevationAt(const glm::dvec3 &p) const noexcept { return glm::length(p) - Radius(); }
+ /// distance to planet center
+ double DistanceAt(const glm::dvec3 &p) const noexcept { return glm::length(p); }
+ /// acceleration due to gravity at given point
+ glm::dvec3 GravityAt(const glm::dvec3 &p) const noexcept { return NormalAt(p) * (-GravitationalParameter() / glm::length2(p)); }
+
+ /// get ground tile
+ Tile &TileAt(const glm::dvec3 &) noexcept;
+ const Tile &TileAt(const glm::dvec3 &) const noexcept;
+ const TileType &TileTypeAt(const glm::dvec3 &) const noexcept;
+
/// Get the tile at given surface and coordinates.
- Tile &TileAt(int surface, int x, int y) {
- return tiles[IndexOf(surface, x, y)];
- }
- const Tile &TileAt(int surface, int x, int y) const {
- return tiles[IndexOf(surface, x, y)];
- }
+ Tile &TileAt(int surface, int x, int y) noexcept;
+ const Tile &TileAt(int surface, int x, int y) const noexcept;
+ const TileType &TypeAt(int surface, int x, int y) const noexcept;
+
+ /// The length in tiles of the side of each surface.
+ int SideLength() const { return sidelength; }
+ // center point of tile on surface at elevation
+ glm::dvec3 TileCenter(int surface, int x, int y, double elevation = 0.0) const noexcept;
+
+ void BuildVAO();
+ void Draw(app::Assets &, graphics::Viewport &) override;
+
+private:
/// 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;
- }
- /// The length of the side of each surface.
- int SideLength() const {
- return 2 * radius + 1;
+ assert(0 <= x && x < sidelength);
+ assert(0 <= y && y < sidelength);
+ return surface * TilesPerSurface() + y * SideLength() + x;
}
- /// 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();
}
private:
- int radius;
- std::unique_ptr<Tile []> tiles;
+ int sidelength;
+ std::vector<Tile> tiles;
+
+ struct Attributes {
+ glm::vec3 position;
+ glm::vec3 normal;
+ glm::vec3 tex_coord;
+ float shiny;
+ float glossy;
+ float metallic;
+ };
+ 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;
}
}