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render.py
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render.py
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import pygame
from view_port import ViewPort2D
class Renderer2D(object):
def __init__(self, location, screen, screenRes, grid, gridSize):
self.screen = screen
self.screenRes = screenRes
self.gridWidth, self.gridHeight = gridSize
self.grid = grid
self.view = ViewPort2D(location, screenRes, gridSize)
self.surface = pygame.Surface(gridSize)
self.regenerate_surface()
def regenerate_surface(self):
""" Regenerates the main game surface - SLOW! """
for x in xrange(0, self.gridWidth):
for y in xrange(0, self.gridHeight):
self.update_square((x, y, self.view.z))
def update_square(self, location):
""" Updates a single grid square in the display """
x, y, z = location
terrainNode = self.grid.get_node_at(location)
if terrainNode is not None:
rect = pygame.Rect(x, y, 1, 1)
terrainNode.contents.render(rect, self.surface)
def render_terrain(self):
""" Renders the viewable terrain onto the screen """
area = pygame.Rect(self.view.x, self.view.y,
self.view.columns, self.view.rows)
viewArea = self.surface.subsurface(area)
pygame.transform.scale(viewArea, self.screenRes, self.screen)
def render_objects(self, objects):
""" Renders renderable objects (e.g. movers) """
for obj in objects:
loc = obj.get_location()
if self.view.contains(loc):
screenX, screenY = self.view.grid2screen(loc)
rect = pygame.Rect(screenX, screenY,
self.view.blockSize,
self.view.blockSize)
obj.render(rect, self.screen)