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

1 files changed, 52 insertions, 0 deletions

diff --git a/dev/a6-harold/sky.h b/dev/a6-harold/sky.h
new file mode 100644
index 0000000..06fcca1
--- /dev/null
+++ b/dev/a6-harold/sky.h
@@ -0,0 +1,52 @@
+/** CSci-4611 Assignment 6: Harold
+ */
+
+#ifndef SKY_H_
+#define SKY_H_
+
+#include <mingfx.h>
+using namespace mingfx;
+
+/** Creates, holds, and draws all of the strokes on the sky.
+ */
+class Sky {
+public:
+    Sky();
+    virtual ~Sky();
+    
+    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 the "sky", which is really a huge sphere
+    /// (radius = 1500) that the viewer is inside.  This function should always return
+    /// true since any screen point can successfully be projected onto the sphere.
+    /// sky_point is set to the resulting 3D point.  Note, this function only checks
+    /// to see if the ray passing through the screen point intersects the sphere; it
+    /// does not check to see if the ray hits the ground or anything else first.
+    bool ScreenPtHitsSky(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
+                       const Point2 &normalized_screen_pt, Point3 *sky_point);
+
+    /// Creates a new sky stroke mesh by projecting each vertex of the 2D mesh
+    /// onto the sky dome and saving the result as a new 3D mesh.
+    void AddSkyStroke(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
+                      const Mesh &stroke2d_mesh, const Color &stroke_color);
+    
+    /// Draws all of the sky strokes
+    void Draw(const Matrix4 &view_matrix, const Matrix4 &proj_matrix);
+    
+private:
+
+    // Each stroke has a 3D mesh and a color
+    struct SkyStroke {
+        Mesh mesh;
+        Color color;
+    };
+    
+    // To store a new stroke to draw, add it to this array
+    std::vector<SkyStroke> strokes_;
+
+    
+    ShaderProgram *stroke3d_shaderprog_;
+};
+
+#endif