sandpypi/sandpypi.py

"""
#File Name: sandpypi.py
# Sandpypi by Stanton.
# Project name is a placeholder.
# This has been a multimonth or year project i have time blindness sorta.
# This is my most functional system for falling sand in python yet i took some things i learned in JS.
# This needs further optimizations to core performance sections.

The main function to run the Sandpypi program.

This function initializes the Pygame environment, creates the simulation and rendering objects, and enters the main event loop. 
It handles user input events such as mouse clicks, mouse wheel scrolling, and keyboard presses. 
It also updates the simulation, draws the particles, buttons, and other UI elements, and manages the settings menu.
The main loop runs at a target frame rate of 60 FPS, with the actual frame rate displayed in the debug overlay.
"""
from settings import pygame,  engine_settings
from rendering import Rendering
from sim import Simulation

def main(): # Main function to run the program
    pygame.init()
    clock = pygame.time.Clock()
    width = 1024
    height = 768
    screen = pygame.display.set_mode((width, height), pygame.HWSURFACE | pygame.DOUBLEBUF)
    sim = Simulation(width, height)
    rendering = Rendering(width, height)
    mouse_down_left = False
    mouse_down_right = False
    mouse_down_middle = False
    mouse_down_wheel_up = False
    mouse_down_wheel_down = False
    over_button = False
    zoom_active = False
    zoom_locked = False
    zoom_pos = None
    settings_visible = False
    settings_menu_y = 100
    running = True      

    while running:
        fps = clock.get_fps() # Get the current frame rate
        dt = clock.tick(300) / 1000 # sets the target frame rate to 60 FPS
        keys = pygame.key.get_pressed()
        zoom_active = keys[pygame.K_z]


        # Handle events
        for event in pygame.event.get():
            if event.type == pygame.MOUSEBUTTONDOWN:
                mouse_pos = pygame.mouse.get_pos()
                    # Check if clicking in settings area when menu is visible
                in_settings_area = False
                if settings_visible:
                    settings_rect = pygame.Rect(rendering.width - 320, 100, 300, 400)
                    in_settings_area = settings_rect.collidepoint(mouse_pos)
 
                if event.button == 4:  # Mouse wheel up
                    sim.brush_size = min(sim.brush_size + 1, sim.max_brush_size)
                elif event.button == 5:  # Mouse wheel down
                    sim.brush_size = max(sim.brush_size - 1, 1)
                elif event.button == 1:  # Left click
                    over_button = False

                # Check settings button first
                    if rendering.settings_button.collidepoint(mouse_pos):
                        settings_visible = not settings_visible
                        over_button = True

                    if zoom_active:
                        zoom_locked = not zoom_locked
                        if zoom_locked:
                            zoom_pos = mouse_pos

                    # Handle settings menu interactions
                    elif settings_visible and in_settings_area:
                        relative_y = mouse_pos[1] - settings_menu_y
                        setting_index = relative_y // 30
                        if 0 <= setting_index < len(engine_settings):
                            setting_name = list(engine_settings.keys())[setting_index]
                            engine_settings[setting_name] = not engine_settings[setting_name]
                        over_button = True

                    elif not in_settings_area:
                        
                        # Check category buttons
                        for category, button in rendering.category_buttons.items():
                            if button.collidepoint(mouse_pos):
                                rendering.current_category = category
                                over_button = True
                                break
                        
                        # Check particle buttons
                        if not over_button:
                            for particle_type, button in rendering.buttons.items():
                                if button.collidepoint(mouse_pos):
                                    sim.current_particle_type = particle_type
                                    over_button = True
                                    break
                        
                        # Check clear screen button
                        if rendering.clear_screen_button.collidepoint(mouse_pos):
                            rendering.clear_screen(sim)
                            over_button = True

                    if not over_button and not in_settings_area:
                        mouse_down_left = True

                elif event.button == 3:  # Right click
                    mouse_down_right = True

                elif event.button == 2:  # Middle click
                    mouse_down_middle = True

            elif event.type == pygame.MOUSEBUTTONUP and event.button == 1:
                mouse_down_left = False
            elif event.type == pygame.MOUSEBUTTONUP and event.button == 3:
                mouse_down_right = False
            elif event.type == pygame.MOUSEBUTTONUP and event.button == 2:
                mouse_down_middle = False

            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_ESCAPE:
                    print("Escape button pressed")
                    print(f"Exiting Program {__file__}")
                    running = False

                elif event.key == pygame.K_SPACE:
                    print(f"Pause button pressed but not functional 'Space'")
                    pass

                elif event.key == pygame.K_c:
                    rendering.clear_screen(sim)

                elif event.key == pygame.K_z:
                    zoom_active = not zoom_active
                    if zoom_active:
                        zoom_locked = False
                        zoom_pos = pygame.mouse.get_pos()  

            elif event.type == pygame.QUIT:
                running = False

        if mouse_down_left and not over_button:
            x, y = pygame.mouse.get_pos()
            sim.create_particle_circle(x, y)

        if mouse_down_right:
            x, y = pygame.mouse.get_pos()
            sim.clear_particles_circle(x, y)

        if mouse_down_middle:
            x, y = pygame.mouse.get_pos()
            sim.create_particle(x, y)

        if zoom_active or zoom_locked:
            mouse_pos = zoom_pos if zoom_locked else pygame.mouse.get_pos()
            zoom_surface = rendering.draw_zoom_window(sim.particles, sim.particle_size, rendering.particle_colors, mouse_pos)
            # Position zoom window
            zoom_x = 10 if mouse_pos[0] > width/2 else width - 110
            zoom_y = 10 if mouse_pos[1] > height/2 else height - 110
            screen.blit(zoom_surface, (zoom_x, zoom_y))

        # Draw Settings
        if settings_visible:
            settings_menu = rendering.draw_settings_menu()
            rendering.screen.blit(settings_menu, (rendering.width - 320, 100))
        rendering.draw_debug_overlay(fps, sim.particles)
        pygame.display.flip()
       
        # Update and draw particles
        sim.simulate_step(dt=0.016)
        # Draw particles
        rendering.draw_particles(sim.particles, sim.active_particles, sim.particle_size, rendering.particle_colors)
        # Draw buttons
        rendering.draw_buttons()
        # Draw brush size slider
        rendering.draw_brush_size_slider(sim.brush_size)
        # Get current mouse position
        mouse_x, mouse_y = pygame.mouse.get_pos()
        # Draw brush cursor at mouse position
        rendering.render_brush_cursor(mouse_x, mouse_y, sim.brush_size * sim.particle_size)
        


    pygame.quit()

if __name__ == "__main__":
    main()