在vispy中绘制平面

import numpy as np
from vispy import app, gloo

vertex_shader = """
attribute vec2 position;
void main()
{
    gl_Position = vec4(position, 0.0, 1.0);
}
"""

fragment_shader = """
void main()
{
    gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
}
"""

vertices = np.array([
    [-0.5, -0.5],
    [0.5, -0.5],
    [0.5, 0.5],
    [-0.5, 0.5]
], dtype=np.float32)

indices = np.array([0, 1, 2, 0, 2, 3], dtype=np.uint32)

canvas = app.Canvas(size=(800, 600), title='Vispy Plane')

vertex_buffer = gloo.VertexBuffer(vertices)
index_buffer = gloo.IndexBuffer(indices)

program = gloo.Program(vertex_shader, fragment_shader)

program['position'] = vertex_buffer

@canvas.connect
def on_draw(event):
    gloo.clear(color='white')
    program.draw('triangles', index_buffer)

canvas.show()
app.run()