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-/** CSci-4611 Assignment 6: Harold
- */
-
-#ifndef BILLBOARDS_H_
-#define BILLBOARDS_H_
-
-#include <mingfx.h>
-using namespace mingfx;
-
-#include "ground.h"
-
-/** Billboards are strokes planted in the ground that rotate automatically to
- face the viewer.  This class holds the entire collection of billboard strokes.
- */
-class Billboards {
-public:
-    Billboards();
-    virtual ~Billboards();
-    
-    void Init(ShaderProgram *stroke3d_shaderprog);
-    
-    /// Projects a 2D normalized screen point (e.g., the mouse position in normalized
-    /// device coordinates) to a 3D point on a plane defined by an "origin", which can
-    /// really be any point coincident with the plane, and the plane normal.  Returns
-    /// true if the screen point projects onto the plane and stores the result in
-    /// plane_point.  Returns false if the screen point does not project onto the plane.
-    bool ScreenPtHitsPlane(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
-                         const Point3 &plane_origin, const Vector3 &plane_normal,
-                         const Point2 &normalized_screen_pt, Point3 *plane_point);
-    
-    
-    /// Checks to see if a ray starting at the eye point and passing through 2D
-    /// normalized screen point projects onto any of the billboards in the scene. If
-    /// so, returns the id of the closest billboard intersected.  If not, returns -1.
-    int IntersectBillboard(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
-                           const Point2 &normalized_screen_pt);
-    
-    
-    /// Adds a new stroke as a billboard by projecting it onto a plane parallel
-    /// to the filmplane that intersects with the anchor point, which should lie
-    /// on the ground.
-    void AddBillboardStroke(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
-                            const std::vector<Point2> &stroke2d, const Mesh &stroke2d_mesh,
-                            const Color &stroke_color, Ground *ground_ptr);
-    
-    /// Edits an existing billboard by adding an additional stroke to it.
-    void AddToBillboard(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
-                        int billboard_id, const Mesh &stroke2d_mesh,
-                        const Color &stroke_color);
-    
-    
-    /// Adjusts the transformation matrix used to draw each billboard so that the
-    /// billboard will face the camera.  Needs to be called each time the camera
-    /// is moved within the scene.
-    void UpdateBillboardRotations(const Point3 &current_eye_point);
-    
-    
-    /// Draws all of the billboards
-    void Draw(const Matrix4 &view_matrix, const Matrix4 &proj_matrix);
-    
-private:
-
-    // each billboard stores the following
-    struct Billboard {
-        Mesh mesh;
-        Color color;
-        Point3 anchor_pt;
-        AABB bounding_box;
-        Matrix4 transform;
-    };
-
-    // the array of all active billboards
-    std::vector<Billboard> billboards_;
-    
-    ShaderProgram *stroke3d_shaderprog_;
-};
-
-#endif