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from typing import Optional
import numpy
from moderngl_window.geometry import AttributeNames
from moderngl_window.opengl.vao import VAO
def cube(
size: tuple[float, float, float] = (1.0, 1.0, 1.0),
center: tuple[float, float, float] = (0.0, 0.0, 0.0),
normals: bool = True,
uvs: bool = True,
name: Optional[str] = None,
attr_names: type[AttributeNames] = AttributeNames,
) -> VAO:
"""Creates a cube VAO with normals and texture coordinates
Keyword Args:
width (float): Width of the cube
height (float): Height of the cube
depth (float): Depth of the cube
center: center of the cube as a 3-component tuple
normals: (bool) Include normals
uvs: (bool) include uv coordinates
name (str): Optional name for the VAO
attr_names (AttributeNames): Attribute names
Returns:
A :py:class:`moderngl_window.opengl.vao.VAO` instance
"""
width, height, depth = size
width, height, depth = width / 2.0, height / 2.0, depth / 2.0
# fmt: off
pos = numpy.array([
center[0] + width, center[1] - height, center[2] + depth,
center[0] + width, center[1] + height, center[2] + depth,
center[0] - width, center[1] - height, center[2] + depth,
center[0] + width, center[1] + height, center[2] + depth,
center[0] - width, center[1] + height, center[2] + depth,
center[0] - width, center[1] - height, center[2] + depth,
center[0] + width, center[1] - height, center[2] - depth,
center[0] + width, center[1] + height, center[2] - depth,
center[0] + width, center[1] - height, center[2] + depth,
center[0] + width, center[1] + height, center[2] - depth,
center[0] + width, center[1] + height, center[2] + depth,
center[0] + width, center[1] - height, center[2] + depth,
center[0] + width, center[1] - height, center[2] - depth,
center[0] + width, center[1] - height, center[2] + depth,
center[0] - width, center[1] - height, center[2] + depth,
center[0] + width, center[1] - height, center[2] - depth,
center[0] - width, center[1] - height, center[2] + depth,
center[0] - width, center[1] - height, center[2] - depth,
center[0] - width, center[1] - height, center[2] + depth,
center[0] - width, center[1] + height, center[2] + depth,
center[0] - width, center[1] + height, center[2] - depth,
center[0] - width, center[1] - height, center[2] + depth,
center[0] - width, center[1] + height, center[2] - depth,
center[0] - width, center[1] - height, center[2] - depth,
center[0] + width, center[1] + height, center[2] - depth,
center[0] + width, center[1] - height, center[2] - depth,
center[0] - width, center[1] - height, center[2] - depth,
center[0] + width, center[1] + height, center[2] - depth,
center[0] - width, center[1] - height, center[2] - depth,
center[0] - width, center[1] + height, center[2] - depth,
center[0] + width, center[1] + height, center[2] - depth,
center[0] - width, center[1] + height, center[2] - depth,
center[0] + width, center[1] + height, center[2] + depth,
center[0] - width, center[1] + height, center[2] - depth,
center[0] - width, center[1] + height, center[2] + depth,
center[0] + width, center[1] + height, center[2] + depth,
], dtype=numpy.float32)
if normals:
normal_data = numpy.array([
-0, 0, 1,
-0, 0, 1,
-0, 0, 1,
0, 0, 1,
0, 0, 1,
0, 0, 1,
1, 0, 0,
1, 0, 0,
1, 0, 0,
1, 0, 0,
1, 0, 0,
1, 0, 0,
0, -1, 0,
0, -1, 0,
0, -1, 0,
0, -1, 0,
0, -1, 0,
0, -1, 0,
-1, -0, 0,
-1, -0, 0,
-1, -0, 0,
-1, -0, 0,
-1, -0, 0,
-1, -0, 0,
0, 0, -1,
0, 0, -1,
0, 0, -1,
0, 0, -1,
0, 0, -1,
0, 0, -1,
0, 1, 0,
0, 1, 0,
0, 1, 0,
0, 1, 0,
0, 1, 0,
0, 1, 0,
], dtype=numpy.float32)
if uvs:
uvs_data = numpy.array([
1, 0,
1, 1,
0, 0,
1, 1,
0, 1,
0, 0,
1, 0,
1, 1,
0, 0,
1, 1,
0, 1,
0, 0,
1, 1,
0, 1,
0, 0,
1, 1,
0, 0,
1, 0,
0, 1,
0, 0,
1, 0,
0, 1,
1, 0,
1, 1,
1, 0,
1, 1,
0, 1,
1, 0,
0, 1,
0, 0,
1, 1,
0, 1,
1, 0,
0, 1,
0, 0,
1, 0
], dtype=numpy.float32)
# fmt: on
vao = VAO(name or "geometry:cube")
# Add buffers
vao.buffer(pos, "3f", [attr_names.POSITION])
if normals:
vao.buffer(normal_data, "3f", [attr_names.NORMAL])
if uvs:
vao.buffer(uvs_data, "2f", [attr_names.TEXCOORD_0])
return vao
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