def set_position(self, position):
self.position = position
current_position = self.points.access_row(0)
# d_vector is a vector to calculate and store the difference between the new and current first points, which can then be applied to the whole points matrix
self.d_vector = current_position[0] - position[0], current_position[1] - position[1], current_position[2] - position[2], current_position[3]
self.projected = self.points = matrix_math.add_vector(self.points, matrix_math.inverse_vector(self.d_vector))
def scale(self, scale_factor, anchor = None): # Anchor is a point object which stores the point to scale from
''' Scales the object from an arbetrary point '''
if anchor == None: # If no anchor is provided, scale from objects centre
anchor = self.find_centre()
scale_matrix = matrix_math.scale_matrix(*scale_factor)
self.points = matrix_math.add_vector(matrix_math.multiply(matrix_math.add_vector(self.points, matrix_math.inverse_vector(anchor)), scale_matrix), anchor) # Equivalent to self.points = scale_factor * (self.points - anchor) + anchor
def _rotate_y(self, anchor, y_rotation):
rotate_y_matrix = matrix_math.rotate_y_matrix(y_rotation)
self.points = matrix_math.add_vector(matrix_math.multiply(matrix_math.add_vector(self.points, matrix_math.inverse_vector(anchor)), rotate_y_matrix), anchor)
def project(self, projection_type, projection_anchor):
self.projected = self.points.copy()
for i, point in enumerate(self.projected):
if projection_type == 'orthographic':
projection_matrix = matrix_math.orthographic_projection_matrix()
elif projection_type == 'perspective':
projection_matrix = matrix_math.perspective_projection_matrix(point[2])
else:
print('ERROR: Invaild projection type entered: {}'.format(projection_type))
self.projected.set_row(i, matrix_math.add_vector(matrix_math.multiply(matrix_math.add_vector(point, matrix_math.inverse_vector(projection_anchor)), projection_matrix), projection_anchor).access_row(0))