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import moderngl_window as glw
import numpy as np
window_cls = glw.get_local_window_cls('pyglet')
window = window_cls(
size=(512, 512), fullscreen=False, title='ModernGL Window',
resizable=False, vsync=True, gl_version=(3, 3)
)
ctx = window.ctx
glw.activate_context(window, ctx=ctx)
window.clear()
window.swap_buffers()
prog = ctx.program(
vertex_shader="""
#version 330
in vec2 in_vert;
in vec3 in_color;
out vec3 v_color;
void main() {
v_color = in_color;
gl_Position = vec4(in_vert, 0.0, 1.0);
}
""",
fragment_shader="""
#version 330
in vec3 v_color;
out vec3 f_color;
void main() {
f_color = v_color;
}
""",
)
x = np.linspace(-1.0, 1.0, 50)
y = np.random.rand(50) - 0.5
r = np.zeros(50)
g = np.ones(50)
b = np.zeros(50)
vertices = np.dstack([x, y, r, g, b])
vbo = ctx.buffer(vertices.astype("f4").tobytes())
vao = ctx.vertex_array(prog, vbo, "in_vert", "in_color")
fbo = ctx.framebuffer(
color_attachments=[ctx.texture((512, 512), 3)]
)
while not window.is_closing:
fbo.use()
fbo.clear(0.0, 0.0, 0.0, 1.0)
vao.render(gl.LINE_STRIP)
ctx.copy_framebuffer(window.fbo, fbo)
window.swap_buffers()
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