camera controls

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

diff --git a/src/world/Planet.hpp b/src/world/Planet.hpp
index 28ecaa03cd206a0e254685928dabeb398203af07..c109934d40e012989cfc6b806610df8821213327 100644 (file)
--- a/src/world/Planet.hpp
+++ b/src/world/Planet.hpp
@@ -75,6 +75,19 @@ public:
        // 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;