Fixed some scaling issues

src/main.py

@@ -75,8 +75,8 @@ class apply_filters:
         self.height = self.img.shape[0]
         self.print_size(self.img.shape)
         print(self.dpi)
-        fig = plt.figure(figsize=(self.width/100, self.height/100),
-                         frameon=False, dpi=self.dpi)
+        fig = plt.figure(figsize=(self.width, self.height),
+                         frameon=False, dpi=1)
 
         ax = plt.Axes(fig, [0., 0., 1., 1.])
         ax.set_axis_off()
@@ -244,9 +244,10 @@ class apply_filters:
         self.img[1:-1:1, 1:-1:1] = rescaled
 
         # Create meshgrid for 3D model
-        verticesX = np.around(np.linspace(0, self.width / 10, self.width), 3)
-        verticesY = np.around(np.linspace(0, self.height / 10, self.height), 3)
-        self.meshgrid = np.meshgrid(verticesX, verticesY)
+        # This sets the scale of stl model
+        x = np.linspace(0, 25.4 * self.width/self.dpi, self.width)
+        y = np.linspace(0, 25.4 * self.height/self.dpi, self.height)
+        self.meshgrid = np.meshgrid(x, y)
 
     def make_mesh(self):
         ''' Create mesh from image.
@@ -266,12 +267,12 @@ class apply_filters:
 
         '''
 
-        # Convert meshgrid and image matrix to array of 3D points
+        # Add the image matrix to the 2D meshgrid and create 1D array of 3D points
         vertice_arr = np.vstack(list(map(np.ravel, self.meshgrid))).T
         z = (self.img / 10).reshape(-1, 1)
         vertice_arr = np.concatenate((vertice_arr, z), axis=1)
 
-        # Convert back to matrix of 3D points
+        # Convert 1D array back to matrix of 3D points
         vertice_arr = vertice_arr.reshape(self.height, self.width, 3)
 
         count = 0
@@ -309,12 +310,11 @@ class apply_filters:
         faces = np.array(faces)
         vertices = np.array(vertices)
 
-        # Create the mesh
-        self.stl_mesh = mesh.Mesh(np.zeros(len(faces), dtype=mesh.Mesh.dtype))
+        # Create the mesh - vertices.shape (no_faces, 3, 3)
+        self.stl_mesh = mesh.Mesh(np.zeros(faces.shape[0], dtype=mesh.Mesh.dtype))
         for i, face in enumerate(faces):
             for j in range(3):
                 self.stl_mesh.vectors[i][j] = vertices[face[j], :]
-                self.stl_mesh.vectors[i][j] /= 2.54  # convert to inches
 
     def save_mesh(self):
         ''' Save final mesh to stl file.