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"""
Mesh with Random Vertex Colors
------------------------------
"""
import bpy
import gpu
import numpy as np
from random import random
from gpu_extras.batch import batch_for_shader
mesh = bpy.context.active_object.data
mesh.calc_loop_triangles()
vertices = np.empty((len(mesh.vertices), 3), 'f')
indices = np.empty((len(mesh.loop_triangles), 3), 'i')
mesh.vertices.foreach_get("co",
np.reshape(vertices, len(mesh.vertices) * 3))
mesh.loop_triangles.foreach_get("vertices",
np.reshape(indices, len(mesh.loop_triangles) * 3))
vertex_colors = [(random(), random(), random(), 1) for _ in range(len(mesh.vertices))]
shader = gpu.shader.from_builtin('3D_SMOOTH_COLOR')
batch = batch_for_shader(shader, 'TRIS',
{"pos" : vertices,
"color" : vertex_colors},
indices=indices)
def draw():
batch.draw(shader)
bpy.types.SpaceView3D.draw_handler_add(draw, (), 'WINDOW', 'POST_VIEW')
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