VertexArray#

 1import moderngl
 2import numpy as np
 3
 4ctx = moderngl.create_standalone_context()
 5
 6prog = ctx.program(
 7    vertex_shader='''
 8        #version 330
 9
10        in vec2 in_vert;
11        in vec3 in_color;
12
13        out vec3 v_color;
14
15        void main() {
16            v_color = in_color;
17            gl_Position = vec4(in_vert, 0.0, 1.0);
18        }
19    ''',
20    fragment_shader='''
21        #version 330
22
23        in vec3 v_color;
24
25        out vec3 f_color;
26
27        void main() {
28            f_color = v_color;
29        }
30    ''',
31)
32
33x = np.linspace(-1.0, 1.0, 50)
34y = np.random.rand(50) - 0.5
35r = np.ones(50)
36g = np.zeros(50)
37b = np.zeros(50)
38
39vertices = np.dstack([x, y, r, g, b])
40
41vbo = ctx.buffer(vertices.astype('f4').tobytes())
42vao = ctx.simple_vertex_array(prog, vbo, 'in_vert', 'in_color')

Proceed to the next step.