Merge branch 'support-code' of github.umn.edu:umn-csci-4611-f21/shared-upstream

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diff --git a/dev/a3-earthquake/earth.h b/dev/a3-earthquake/earth.h
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+/** CSci-4611 Assignment 3:  Earthquake
+ */
+
+#ifndef EARTH_H_
+#define EARTH_H_
+
+#include <mingfx.h>
+using namespace mingfx;
+
+
+/** This class can draw a textured earth as either a plane or a sphere or
+    somewhere inbetween in order to support morphing from one shape to another.
+ */
+class Earth {
+public:
+    Earth();
+    virtual ~Earth();
+  
+    /// Load texture and define geometry.  Initializes the mesh to the planar
+    /// version of the earth.  The searchPath is for finding the texture file.
+    void Init(const std::vector<std::string> &search_path);
+
+    /// Draw the Earth to screen using the current version of the mesh set with
+    /// the last call to UpdateMesh.
+    void Draw(const Matrix4 &model_matrix, const Matrix4 &view_matrix, const Matrix4 &proj_matrix);
+
+    /// Given latitude and longitude, calculate 3D position for the flat earth
+    /// model that lies on a plane
+    Point3 LatLongToPlane(double latitude, double longitude) const;
+
+    /// Given latitude and longitude, calculate the 3D position for the spherical
+    /// earth model.
+    Point3 LatLongToSphere(double latitude, double longitude) const;
+    
+    /// This can be a helpful debugging aid when creating your triangle mesh.  It
+    /// draws the triangles and normals for the current earth mesh.
+    void DrawDebugInfo(const Matrix4 &model_matrix, const Matrix4 &view_matrix, const Matrix4 &proj_matrix);
+    
+protected:
+    
+    // Stores the earth texture map
+    Texture2D earth_tex_;
+    
+    // Stores the earth geometry as a renderable mesh
+    Mesh earth_mesh_;
+    
+    // Renders meshes with texture and some simple shading
+    DefaultShader shader_;
+    DefaultShader::MaterialProperties earth_material_;
+    
+    // Used only for the DrawDebugInfo() routine
+    QuickShapes quick_shapes_;
+};
+
+
+#endif
+  
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