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"""
Wireframe Cube using Index Buffer
---------------------------------
"""
import bpy
import gpu
from gpu_extras.batch import batch_for_shader
coords = (
(-1, -1, -1), (+1, -1, -1),
(-1, +1, -1), (+1, +1, -1),
(-1, -1, +1), (+1, -1, +1),
(-1, +1, +1), (+1, +1, +1))
indices = (
(0, 1), (0, 2), (1, 3), (2, 3),
(4, 5), (4, 6), (5, 7), (6, 7),
(0, 4), (1, 5), (2, 6), (3, 7))
shader = gpu.shader.from_builtin('POLYLINE_UNIFORM_COLOR')
batch = batch_for_shader(shader, 'LINES', {"pos": coords}, indices=indices)
def draw():
shader.uniform_float("viewportSize", gpu.state.viewport_get()[2:])
shader.uniform_float("lineWidth", 4.5)
shader.uniform_float("color", (1, 0, 0, 1))
batch.draw(shader)
bpy.types.SpaceView3D.draw_handler_add(draw, (), 'WINDOW', 'POST_VIEW')
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