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path: root/src/display.py
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import pygame

import helper


def draw(canvas, screen, need_update_world, world, mouse, blocks, zoom, offset, block_coordinates):
    canvas.fill("red")

    width = screen.get_size()[0]
    height = width / (16/9)

    if width > screen.get_size()[0] or height > screen.get_size()[1]:
        height = screen.get_size()[1]
        width = height * (16/9)

    world_display = pygame.Surface((1280, 720))

    if need_update_world:
        world.fill("gray")

        for block in blocks:
            world.blit(helper.draw_texture(helper.get_block_texture(block[2])), (block[0], block[1]))

        need_update_world = False

    world_display.blit(world, (0, 0))

    if mouse[0] > -1 and mouse[1] > -1 and pygame.mouse.get_focused():
        cursor_x = original_cursor_x = mouse[0] - 42 / 2
        cursor_y = original_cursor_y = mouse[1] - 42 / 2
        cursor_changed = False

        for block in blocks:
            if abs(block[0] - mouse[0] + 42 / 2) < 21 and abs(block[1] - mouse[1] + 42 / 2) < 21:
                cursor_x = block[0]
                cursor_y = block[1]
                cursor_changed = True
                break
            if abs(block[0] - mouse[0] + 42 / 2) < 21 and abs(block[1] - mouse[1] + 42 / 2 + 15) < 21:
                cursor_x = block[0]
                cursor_y = block[1] + 15
                cursor_changed = True
                break

        if cursor_changed:
            has_block_below = False

            for i in range(len(blocks) - 1, -1, -1):
                if blocks[i][0] == cursor_x and blocks[i][1] == cursor_y:
                    has_block_below = True
                    break

            if has_block_below:
                world_display.blit(helper.draw_texture(5), (cursor_x, cursor_y))
            else:
                world_display.blit(helper.draw_texture(1), (cursor_x, cursor_y))

            block_coordinates = (cursor_x, cursor_y)
        else:
            block_coordinates = (-1, -1)

        world_display.blit(helper.draw_texture(2), (original_cursor_x + 42 / 2, original_cursor_y + 42 / 2))

    x = 1280 / 2 - zoom[0] / 2 + offset[0]
    y = 720 / 2 - zoom[1] / 2 + offset[1]

    if x < 0:
        x = 0
        offset = (offset[0] - 10, offset[1])

    if y < 0:
        y = 0
        offset = (offset[0], offset[1])

    if x + zoom[0] > 1280:
        x = 0
        offset = (offset[0] - 10, offset[1])

    if y + zoom[1] > 720:
        y = 0
        offset = (offset[0], offset[1])

    canvas.blit(pygame.transform.scale(world_display.subsurface(x, y, zoom[0], zoom[1]), (1280, 720)), (0, 0))

    scaled_win = pygame.transform.scale(canvas, (width, height))
    screen.blit(scaled_win, (screen.get_size()[0] / 2 - width / 2, screen.get_size()[1] / 2 - height / 2))

    pygame.display.flip()

    return canvas, screen, need_update_world, world, mouse, blocks, zoom, offset, block_coordinates