Hello,
I'm trying to *efficiently* draw a tilemap in my game. At first i had
a Sprite instance for each of my tiles, and i thought that adding &
removing them from the viewport was the cause of those freezes but it
appears that i'm having the same problem with a lower-level version of
it, here is my code :
import pyglet
from pyglet.gl import *
from pyglet.window import key
window = pyglet.window.Window(width=800,height=800,vsync=0)
batch = pyglet.graphics.Batch()
keys = pyglet.window.key.KeyStateHandler()
window.push_handlers(keys)
fps_display = pyglet.clock.ClockDisplay()
class TextureState:
def __init__(self, texture):
self.texture = texture
self.parent = None
def set_state(self):
glEnable(self.texture.target)
glBindTexture(self.texture.target, self.texture.id)
def unset_state(self):
glDisable(self.texture.target)
# Loading texture
spritesheet = pyglet.image.load('zelda2nestiles.png')
tile_seq = pyglet.image.ImageGrid(spritesheet, 12, 15)
tile_tex = pyglet.image.TextureGrid(tile_seq)
mytex = tile_tex[(5,5)]
rows = cols = 60
chunk_size = 128
width = height = 16
def gen_vertex(x,y1):
vertex_data = []
texture_data = []
for row in range(rows):
y2 = y1 + height
x1 = x
for col in range(cols):
x2 = x1 + width
vertex_data.extend([x1, y1, x2, y1, x2, y2, x1, y2])
texture_data.extend(mytex.tex_coords)
x1 = x2
y1 = y2
return vertex_data, texture_data
vertex_data, texture_data = gen_vertex(0,0)
v = batch.add(cols * rows * 4, GL_QUADS, TextureState(mytex),
('v2f', vertex_data),
('t3f', texture_data))
# Init vars
camx = camy = 800/2
step = 5
active_chunk = (424242,424242)
def update(dt):
global camx, camy, active_chunk
chunk = (-camx / chunk_size, -camy /chunk_size)
if not chunk == active_chunk:
active_chunk = chunk
x,y = chunk[0]*chunk_size, chunk[1]*chunk_size
vertex_data, texture_data = gen_vertex(x,y)
v.vertices = vertex_data
if keys[key.Z]:
camy -= step
if keys[key.S]:
camy += step
if keys[key.Q]:
camx += step
if keys[key.D]:
camx -= step
@window.event
def on_draw():
window.clear()
glPushMatrix()
glTranslatef(camx, camy, 0)
batch.draw()
glPopMatrix()
fps_display.draw()
pyglet.clock.schedule_interval(update, 1/60.)
pyglet.app.run()
More readable version : http://paste2.org/p/1801849
The spritesheet : http://www.dwedit.org/sprites/zelda2nestiles.png
Micro freezes appear several times per second when moving the camera
(with ZQSD). My code regenerate the vertex array every 128 pixels, so
it doesn't appear to be linked to my problem, i also tried with the -O
argument.
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