241 lines
11 KiB
Python
241 lines
11 KiB
Python
# core/renderer.py
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"""Handles all rendering operations."""
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import pygame
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import math
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from config.constants import *
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class Renderer:
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def __init__(self, screen):
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self.screen = screen
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def clear_screen(self):
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"""Clear the screen with a black background."""
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self.screen.fill(BLACK)
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def draw_grid(self, camera, showing_grid=True):
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"""Draw the reference grid."""
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if not showing_grid:
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return
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# Calculate effective cell size with zoom
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effective_cell_size = CELL_SIZE * camera.zoom
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# Calculate grid boundaries in world coordinates (centered at 0,0)
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grid_world_width = GRID_WIDTH * effective_cell_size
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grid_world_height = GRID_HEIGHT * effective_cell_size
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# Calculate grid position relative to camera (with grid centered at 0,0)
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grid_center_x = SCREEN_WIDTH // 2 - camera.x * camera.zoom
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grid_center_y = SCREEN_HEIGHT // 2 - camera.y * camera.zoom
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grid_left = grid_center_x - grid_world_width // 2
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grid_top = grid_center_y - grid_world_height // 2
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grid_right = grid_left + grid_world_width
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grid_bottom = grid_top + grid_world_height
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# Check if grid is visible on screen
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if (grid_right < 0 or grid_left > SCREEN_WIDTH or
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grid_bottom < 0 or grid_top > SCREEN_HEIGHT):
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return
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# Fill the grid area with dark gray background
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grid_rect = pygame.Rect(
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max(0, grid_left),
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max(0, grid_top),
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min(SCREEN_WIDTH, grid_right) - max(0, grid_left),
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min(SCREEN_HEIGHT, grid_bottom) - max(0, grid_top),
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)
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if grid_rect.width > 0 and grid_rect.height > 0:
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pygame.draw.rect(self.screen, DARK_GRAY, grid_rect)
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# Draw grid lines only if zoom is high enough
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if effective_cell_size > 4:
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self._draw_grid_lines(grid_left, grid_top, grid_right, grid_bottom, effective_cell_size)
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def _draw_grid_lines(self, grid_left, grid_top, grid_right, grid_bottom, effective_cell_size):
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"""Draw the grid lines."""
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vertical_lines = []
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horizontal_lines = []
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for i in range(max(GRID_WIDTH, GRID_HEIGHT) + 1):
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# Vertical lines
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if i <= GRID_WIDTH:
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line_x = grid_left + i * effective_cell_size
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if 0 <= line_x <= SCREEN_WIDTH:
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start_y = max(0, grid_top)
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end_y = min(SCREEN_HEIGHT, grid_bottom)
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if start_y < end_y:
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vertical_lines.append(((line_x, start_y), (line_x, end_y)))
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# Horizontal lines
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if i <= GRID_HEIGHT:
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line_y = grid_top + i * effective_cell_size
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if 0 <= line_y <= SCREEN_HEIGHT:
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start_x = max(0, grid_left)
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end_x = min(SCREEN_WIDTH, grid_right)
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if start_x < end_x:
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horizontal_lines.append(((start_x, line_y), (end_x, line_y)))
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# Draw all lines
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for start, end in vertical_lines:
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pygame.draw.line(self.screen, GRAY, start, end)
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for start, end in horizontal_lines:
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pygame.draw.line(self.screen, GRAY, start, end)
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def render_world(self, world, camera):
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"""Render all world objects."""
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world.render_all(camera, self.screen)
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def render_interaction_radius(self, world, camera, selected_objects, show_radius=False):
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"""Render interaction radius and debug vectors for objects."""
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if not show_radius:
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return
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for obj in world.get_objects():
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obj_x, obj_y = obj.position.get_position()
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radius = obj.interaction_radius
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if radius > 0 and camera.is_in_view(obj_x, obj_y, margin=radius):
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if selected_objects and obj not in selected_objects:
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continue
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screen_x, screen_y = camera.world_to_screen(obj_x, obj_y)
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screen_radius = int(radius * camera.zoom)
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if screen_radius > 0:
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# Draw interaction radius circle
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pygame.draw.circle(self.screen, RED, (screen_x, screen_y), screen_radius, 1)
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# Draw direction arrow
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self._draw_direction_arrow(obj, screen_x, screen_y, camera)
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# Draw debug vectors
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self._draw_debug_vectors(obj, screen_x, screen_y, camera)
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def _draw_direction_arrow(self, obj, screen_x, screen_y, camera):
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"""Draw direction arrow for an object."""
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rotation_angle = obj.rotation.get_rotation()
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arrow_length = obj.max_visual_width / 2 * camera.zoom
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end_x = screen_x + arrow_length * math.cos(math.radians(rotation_angle))
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end_y = screen_y + arrow_length * math.sin(math.radians(rotation_angle))
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# Draw arrow line
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pygame.draw.line(self.screen, WHITE, (screen_x, screen_y), (end_x, end_y), 2)
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# Draw arrowhead
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tip_size = DIRECTION_TIP_SIZE * camera.zoom
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left_tip_x = end_x - tip_size * math.cos(math.radians(rotation_angle + 150 + 180))
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left_tip_y = end_y - tip_size * math.sin(math.radians(rotation_angle + 150 + 180))
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right_tip_x = end_x - tip_size * math.cos(math.radians(rotation_angle - 150 + 180))
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right_tip_y = end_y - tip_size * math.sin(math.radians(rotation_angle - 150 + 180))
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pygame.draw.polygon(
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self.screen, WHITE,
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[(end_x, end_y), (left_tip_x, left_tip_y), (right_tip_x, right_tip_y)]
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)
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def _draw_debug_vectors(self, obj, screen_x, screen_y, camera):
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"""Draw debug vectors (acceleration, velocity, angular acceleration)."""
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# Draw angular acceleration
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if hasattr(obj, 'angular_acceleration'):
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self._draw_angular_acceleration(obj, screen_x, screen_y, camera)
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# Draw acceleration vector
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if hasattr(obj, 'acceleration') and isinstance(obj.acceleration, tuple) and len(obj.acceleration) == 2:
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self._draw_acceleration_vector(obj, screen_x, screen_y, camera)
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# Draw velocity vector
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if hasattr(obj, 'velocity') and isinstance(obj.velocity, tuple) and len(obj.velocity) == 2:
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self._draw_velocity_vector(obj, screen_x, screen_y, camera)
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def _draw_angular_acceleration(self, obj, screen_x, screen_y, camera):
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"""Draw angular acceleration vector."""
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rotation_angle = obj.rotation.get_rotation()
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arrow_length = obj.max_visual_width / 2 * camera.zoom
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end_x = screen_x + arrow_length * math.cos(math.radians(rotation_angle))
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end_y = screen_y + arrow_length * math.sin(math.radians(rotation_angle))
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angular_acceleration = obj.angular_acceleration
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angular_accel_magnitude = abs(angular_acceleration) * ANGULAR_ACCELERATION_SCALE * camera.zoom
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angular_direction = rotation_angle + 90 if angular_acceleration >= 0 else rotation_angle - 90
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angular_acc_end_x = end_x + angular_accel_magnitude * math.cos(math.radians(angular_direction))
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angular_acc_end_y = end_y + angular_accel_magnitude * math.sin(math.radians(angular_direction))
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pygame.draw.line(self.screen, LIGHT_BLUE, (end_x, end_y), (angular_acc_end_x, angular_acc_end_y), 2)
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# Draw arrowhead
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self._draw_arrowhead(angular_acc_end_x, angular_acc_end_y, angular_direction,
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ANGULAR_TIP_SIZE * camera.zoom, LIGHT_BLUE)
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def _draw_acceleration_vector(self, obj, screen_x, screen_y, camera):
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"""Draw acceleration vector."""
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acc_x, acc_y = obj.acceleration
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acc_magnitude = math.sqrt(acc_x ** 2 + acc_y ** 2)
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if acc_magnitude > 0:
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acc_direction = math.degrees(math.atan2(acc_y, acc_x))
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acc_vector_length = acc_magnitude * ACCELERATION_SCALE * camera.zoom
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acc_end_x = screen_x + acc_vector_length * math.cos(math.radians(acc_direction))
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acc_end_y = screen_y + acc_vector_length * math.sin(math.radians(acc_direction))
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pygame.draw.line(self.screen, RED, (screen_x, screen_y), (acc_end_x, acc_end_y), 2)
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self._draw_arrowhead(acc_end_x, acc_end_y, acc_direction,
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ARROW_TIP_SIZE * camera.zoom, RED)
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def _draw_velocity_vector(self, obj, screen_x, screen_y, camera):
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"""Draw velocity vector."""
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vel_x, vel_y = obj.velocity
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vel_magnitude = math.sqrt(vel_x ** 2 + vel_y ** 2)
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if vel_magnitude > 0:
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vel_direction = math.degrees(math.atan2(vel_y, vel_x))
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vel_vector_length = vel_magnitude * VELOCITY_SCALE * camera.zoom
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vel_end_x = screen_x + vel_vector_length * math.cos(math.radians(vel_direction))
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vel_end_y = screen_y + vel_vector_length * math.sin(math.radians(vel_direction))
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pygame.draw.line(self.screen, BLUE, (screen_x, screen_y), (vel_end_x, vel_end_y), 2)
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self._draw_arrowhead(vel_end_x, vel_end_y, vel_direction,
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ARROW_TIP_SIZE * camera.zoom, BLUE)
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def _draw_arrowhead(self, end_x, end_y, direction, tip_size, color):
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"""Draw an arrowhead at the specified position."""
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left_tip_x = end_x - tip_size * math.cos(math.radians(direction + 150 + 180))
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left_tip_y = end_y - tip_size * math.sin(math.radians(direction + 150 + 180))
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right_tip_x = end_x - tip_size * math.cos(math.radians(direction - 150 + 180))
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right_tip_y = end_y - tip_size * math.sin(math.radians(direction - 150 + 180))
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pygame.draw.polygon(
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self.screen, color,
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[(end_x, end_y), (left_tip_x, left_tip_y), (right_tip_x, right_tip_y)]
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)
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def render_selection_rectangle(self, selection_rect):
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"""Render the selection rectangle."""
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if not selection_rect:
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return
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left, top, width, height = selection_rect
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# Draw semi-transparent fill
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s = pygame.Surface((width, height), pygame.SRCALPHA)
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s.fill(SELECTION_GRAY)
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self.screen.blit(s, (left, top))
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# Draw border
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pygame.draw.rect(self.screen, SELECTION_BORDER,
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pygame.Rect(left, top, width, height), 1)
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def render_selected_objects_outline(self, selected_objects, camera):
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"""Render blue outline for selected objects."""
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for obj in selected_objects:
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obj_x, obj_y = obj.position.get_position()
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width = obj.max_visual_width if hasattr(obj, "max_visual_width") else 10
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screen_x, screen_y = camera.world_to_screen(obj_x, obj_y)
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size = camera.get_relative_size(width)
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rect = pygame.Rect(screen_x - size // 2, screen_y - size // 2, size, size)
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pygame.draw.rect(self.screen, SELECTION_BLUE, rect, 1) |