X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fworld%2FPlanet.hpp;h=2034b8dc4c787b4f30e6a52eb87389402e1c1f95;hb=0e061ce526fe46dd3e894223e5d646eb2e30f826;hp=28ecaa03cd206a0e254685928dabeb398203af07;hpb=8f6530c75730f901efd6708e4fde7e68a178adf1;p=blobs.git

diff --git a/src/world/Planet.hpp b/src/world/Planet.hpp
index 28ecaa0..2034b8d 100644
--- a/src/world/Planet.hpp
+++ b/src/world/Planet.hpp
@@ -35,16 +35,33 @@ public:
 	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); }
+
+	/// 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;
 
-	const TileType &TypeAt(int surface, int x, int y) const;
+	/// 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(const Set<TileType> &);
+	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);
@@ -52,10 +69,6 @@ public:
 		assert(0 <= y && y < sidelength);
 		return surface * TilesPerSurface() + y * SideLength() + x;
 	}
-	/// The length of the side of each surface.
-	int SideLength() const {
-		return sidelength;
-	}
 	/// The number of tiles of one surface.
 	int TilesPerSurface() const {
 		return SideLength() * SideLength();
@@ -65,25 +78,13 @@ public:
 		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;
-
-	void BuildVAO(const Set<TileType> &);
-	void Draw(app::Assets &, graphics::Viewport &) override;
-
 private:
 	int sidelength;
 	std::vector<Tile> tiles;
 
 	struct Attributes {
 		glm::vec3 position;
+		glm::vec3 normal;
 		glm::vec3 tex_coord;
 	};
 	std::unique_ptr<graphics::SimpleVAO<Attributes, unsigned int>> vao;