I am currently trying to create an occlusion object in Pygame, trying to dynamically obscure part of an image. The way I currently have this occlusion set up is that it is a transparent surface being blited to the main surface of the image; however, no matter how I choose to implement this occlusion, I have the same issue of flickering/inconsistent position of the occlusion surface Occlusion with intended transparency Occlusion with coloring Method for creating occlusion within the sprite object as well as sprites run method: def create_occlusion_rect(self, pos_x, pos_y, width, height): #spirte_occlusion = occlusion(pos_x, pos_y, width, height) spirte_occlusion = [[pos_x, pos_y], pygame.surface.Surface((width, height))] self.occlusion_rects.append(spirte_occlusion) return spirte_occlusion def run(self, event_loop, delta_time): self.surface.fill((20, 20, 20)) self.surface.blit(self.surface_image, ((self.width_difference), - (self.height_difference))) for occlusion in self.occlusion_rects: occlusion[1].fill((0, 0, 255)) self.surface.blit(occlusion[1], occlusion[0]) Code for the arms object: class grab_arms(): def __init__(self, pos, direction, groups): self.buffer = 50 self.pos = [pos[0] - 24 - self.buffer, pos[1] + 16] self.direction = direction self.action = "init" front = groups[0] back = groups[1] arm_image_front = pygame.image.load("assets/pictures/projectiles/arms/front/right/0.png").convert_alpha() arm_image_back = pygame.image.load("assets/pictures/projectiles/arms/back/right/0.png").convert_alpha() self.front_arms = sprite("Arms_Front", [self.pos[0] - 6, self.pos[1] + 6], [front], self.pos, [5, 5], arm_image_front, buffer=[self.buffer, 0]) self.back_arms = sprite("Arms_Back", [self.pos[0] - 2, self.pos[1]], [back], self.pos, [5, 5], arm_image_back, buffer=[self.buffer, 0]) self.front_surf_pos = [self.front_arms.pos[0], self.front_arms.pos[1]] self.back_surf_pos = [self.back_arms.pos[0], self.back_arms.pos[1]] self.occlusion_width = 40 self.occlusion_width_max = self.occlusion_width self.occlusion_height = 40 self.total_movement_x = 0 self.total_movement_y = 0 self.back_occlusion = self.back_arms.create_occlusion_rect(self.buffer, 0, self.occlusion_width, self.occlusion_height) self.front_occlusion = self.front_arms.create_occlusion_rect(self.buffer, 0, self.occlusion_width, self.occlusion_height) self.reverse = False self.destroy = False def run(self, delta_time): if self.reverse == False and self.destroy == False: frame_movement = 50 * delta_time self.total_movement_x += frame_movement if self.total_movement_x >= self.occlusion_width_max: self.reverse = True self.occlusions_cleared = True else: self.front_arms.pos[0] += frame_movement self.back_arms.pos[0] += frame_movement self.occlusion_width -= frame_movement if self.occlusion_width < 1: self.occlusion_width = 1 self.front_occlusion[0][0] -= frame_movement self.back_occlusion[0][0] -= frame_movement #self.front_arms.resize_occlusion(0, (self.occlusion_width+100, self.occlusion_height)) elif self.reverse == True and self.destroy == False: frame_movement = -50 * delta_time self.total_movement_x += frame_movement if self.total_movement_x <= 0: self.destroy = True else: self.front_arms.pos[0] += frame_movement self.back_arms.pos[0] += frame_movement self.occlusion_width -= frame_movement if self.occlusion_width < 1: self.occlusion_width = 1 self.front_occlusion[0][0] -= frame_movement self.back_occlusion[0][0] -= frame_movement #self.front_arms.resize_occlusion(0, (self.occlusion_width+100, self.occlusion_height)) Code for initializing and updating grab arms from player class #initalizing if keys[pygame.K_e]: for event in event_loop: if event.type == pygame.KEYDOWN and event.key == 101 and self.movement_options['grab']== True: self.grab_arms = grab_arms(self.pos, self.direction_animation, self.grab_arms_groups) self.movement_options['grab'] = False #updating if self.grab_arms != None: self.grab_arms.run(delta_time) if self.grab_arms.destroy == True: for group in self.grab_arms_groups: if len(group) > 0: group.pop(0) self.grab_arms = None self.movement_options['grab'] = True Code for drawing objects in level order def draw(self, display): self.camera.update() self.camera.draw_ui(display, self.back_sprites, self.wall_sprites, self.entity_sprites, self.front_sprites) Code for basic camera rendering def draw_ui(self, display, *sprites): for sprite_groups in sprites: for sprite in sprite_groups: display.blit(sprite.surface, sprite.pos) Somethings I have tried, all of which have had the same effect, Transforming the subsurface instead of moving it Drawing a rectangle instead of a surface and changing position Drawing a rectangle and changing the width Continue reading...
