3 files changed, 44 insertions, 26 deletions
diff --git a/dev/a6-harold/README.md b/dev/a6-harold/README.md
index e69de29..4fb595a 100644
--- a/dev/a6-harold/README.md
+++ b/dev/a6-harold/README.md
@@ -0,0 +1,2 @@
+# A6
+The only major bug that I found is a crash when the user tries to make a drawing of size 0 in the sky. This can be reproduce by just clicking in the sky. Otherwise everything works as it should.
+\ No newline at end of file
diff --git a/dev/a6-harold/ground.cc b/dev/a6-harold/ground.cc
index 51d4d92..969e2d0 100644
--- a/dev/a6-harold/ground.cc
+++ b/dev/a6-harold/ground.cc
@@ -164,18 +164,27 @@ void Ground::ReshapeGround(const Matrix4 &view_matrix, const Matrix4 &proj_matri
     // should pass through these two points on the ground.  The plane should also
     // have a normal vector that points toward the camera and is parallel to the
     // ground plane.
+    int first_point = 0;
+    int last_point = stroke2d.size()-1;
+    Point3 start, end;
+    ScreenPtHitsGround(view_matrix, proj_matrix, stroke2d[first_point], &start);
+    ScreenPtHitsGround(view_matrix, proj_matrix, stroke2d[last_point], &end);
+    Vector3 plane_x = Vector3::Normalize(start - end);
+    Vector3 plane_y = Vector3(0, 1, 0);
+    Vector3 plane_normal = Vector3::Normalize(-look);
 
-    
-    
-    
-    
     // 2. Project the 2D stroke into 3D so that it lies on the "projection plane"
     // defined in step 1.
-    
-    
-    
-    
-    
+    std::vector<Point3> stroke3d;
+    for (int i = 0; i < last_point; i++) {
+        Point3 pt3d;
+        Point3 mouseIn3d = GfxMath::ScreenToNearPlane(view_matrix, proj_matrix, stroke2d[i]);
+        Ray eyeThroughMouse = Ray(eye, (mouseIn3d - eye).ToUnit());
+        float time;
+        eyeThroughMouse.IntersectPlane(start, plane_normal, &time, &pt3d);
+        stroke3d.push_back(pt3d);
+    }
+
     // 3. Loop through all of the vertices of the ground mesh, and adjust the
     // height of each based on the equations in section 4.5 of the paper, also
     // repeated in the assignment handout.  The equations rely upon a function
@@ -186,11 +195,14 @@ void Ground::ReshapeGround(const Matrix4 &view_matrix, const Matrix4 &proj_matri
         Point3 P = ground_mesh_.read_vertex_data(i); // original vertex
 
         // adjust P according to equations...
-        
-        
-        
-        
-        
+        float h = hfunc(plane_normal, stroke3d, P);
+        float wd = 0;
+        float d = P.DistanceToPlane(start, plane_normal);
+        if (1 - pow(d / 5, 2) > 0) 
+            wd = 1 - pow(d / 5, 2);
+        if (h != 0)
+            P = Point3(P[0], (1 - wd) * P[1] + wd * h, P[2]);
+
         new_verts.push_back(P);
     }
     ground_mesh_.SetVertices(new_verts);
diff --git a/dev/a6-harold/sky.cc b/dev/a6-harold/sky.cc
index bc08ca0..8b04a69 100644
--- a/dev/a6-harold/sky.cc
+++ b/dev/a6-harold/sky.cc
@@ -34,12 +34,12 @@ bool Sky::ScreenPtHitsSky(const Matrix4 &view_matrix, const Matrix4 &proj_matrix
     Point3 eye = camera_matrix.ColumnToPoint3(3);
     
     // TODO: Stitch together your worksheet implementation of this method
-    return true;
+    Point3 mouseIn3d = GfxMath::ScreenToNearPlane(view_matrix, proj_matrix, normalized_screen_pt);
+    Ray eyeThroughMouse = Ray(eye, (mouseIn3d - eye).ToUnit());
+    float t;
+    return eyeThroughMouse.IntersectSphere(Point3::Origin(), 1500, &t, 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 Sky::AddSkyStroke(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
@@ -47,15 +47,19 @@ void Sky::AddSkyStroke(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
 {
     // TODO: Create a new SkyStroke and add it to the strokes_ array.
 
+    Mesh sky = stroke2d_mesh;
+    std::vector<Point3> sky_points;
+    for (int i = 0; i < sky.num_vertices(); i++) {
+        Point3 sky_point;
+        ScreenPtHitsSky(view_matrix, proj_matrix, Point2(sky.read_vertex_data(i)[0], sky.read_vertex_data(i)[1]), &sky_point);
+        sky_points.push_back(sky_point);
+    }
+    sky.SetVertices(sky_points);
 
-
-
-
-
-
-
-
-
+    SkyStroke sky_stroke;
+    sky_stroke.mesh = sky;
+    sky_stroke.color = stroke_color;
+    strokes_.push_back(sky_stroke);
 }