Set up camera

[hanson-hschang]

Currently, the camera in the results of the .blend file is initialized from a far distance. It might be better to have a command to set camera location, look at and some other camera properties. (Might be useful to have similar things as the one in povray?

[hanson-hschang]

Instead of camera, blender python implement region_3d in viewport (see the following reference)

• change viewport angle

  def camera(self, view):
  """ Return position, rotation data about a given view for the first space attached to it """
  look_at = view.spaces[0].region_3d.view_location
  matrix = view.spaces[0].region_3d.view_matrix
  camera_pos = self.camera_position(matrix)
  rotation = view.spaces[0].region_3d.view_rotation
  return look_at, camera_pos, rotation

[hanson-hschang]

The following implementation works:

def find_area(area_type: str) -> Optional[bpy.types.Area]:
    try:
        for area in bpy.data.window_managers[0].windows[0].screen.areas:
            if area.type == area_type:
                return area
        return None
    except:
        return None

def set_view_distance(distance: float) -> None:
    assert (
        isinstance(distance, (int, float)) and distance > 0
    ), "distance must be a positive number"
    area_view_3d = find_area("VIEW_3D")
    region_3d = area_view_3d.spaces[0].region_3d
    region_3d.view_distance = distance

[hanson-hschang]

With commit 8ce65ad, it now can set view distance. Still missing other property, e.g. look_at, view_position, rotation... etc

[hanson-hschang]

Branch merge #28 closes this issue.