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from pathlib import Path
import numpy as np
import random
import moderngl
import moderngl_window
from moderngl_window.opengl.vao import VAO
from moderngl_window import geometry
class Boids2(moderngl_window.WindowConfig):
"""Minimal WindowConfig example"""
gl_version = (3, 3)
window_size = 256, 256
aspect_ratio = 1.0
title = "Basic Window Config"
resource_dir = (Path(__file__) / '../../resources').absolute()
def __init__(self, **kwargs):
super().__init__(**kwargs)
# Offscreen buffers
self.texture_1 = self.ctx.texture(self.wnd.buffer_size, 4, dtype='f4')
self.texture_2 = self.ctx.texture(self.wnd.buffer_size, 4, dtype='f4')
self.fbo_1 = self.ctx.framebuffer(color_attachments=[self.texture_1])
self.fbo_2 = self.ctx.framebuffer(color_attachments=[self.texture_1])
# VAOs
self.quad_fs = geometry.quad_fs()
N = 1000
def gen_boids(n):
for i in range(n):
yield random.uniform(-1, 1)
yield random.uniform(-1, 1)
yield random.uniform(-1, 1)
yield random.uniform(-1, 1)
data = np.fromiter(gen_boids(N), dtype='f4', count=N * 4)
self.boids_buffer_1 = self.ctx.buffer(data=data)
self.boids_buffer_2 = self.ctx.buffer(reserve=data.nbytes)
self.boids_vao_1 = VAO(name='boids_1')
self.boids_vao_1.buffer(self.boids_buffer_1, '2f 2f', ['in_position', 'in_velocity'])
self.boids_vao_2 = VAO(name='boids_2')
self.boids_vao_2.buffer(self.boids_buffer_2, '2f 2f', ['in_position', 'in_velocity'])
# Programs
self.tex_prog = self.load_program('programs/texture.glsl')
self.tex_prog['texture0'].value = 0
self.boid_points = self.load_program('programs/boids2/boid_points.glsl')
# self.boid_locality = self.load_program('programs/boids2/boids_locality_info.glsl')
def render(self, time, frametime):
self.fbo_1.use()
# Render initial data to framebuffer
self.boids_vao_1.render(self.boid_points, mode=moderngl.POINTS)
# debug render fbo
self.wnd.fbo.use()
self.texture_1.use(location=0)
self.quad_fs.render(self.tex_prog)
# Gather locality info
# ..
if __name__ == '__main__':
moderngl_window.run_window_config(Boids2)
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