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import numpy as np
import pytest
from pyrender import PerspectiveCamera, OrthographicCamera
def test_perspective_camera():
# Set up constants
znear = 0.05
zfar = 100
yfov = np.pi / 3.0
width = 1000.0
height = 500.0
aspectRatio = 640.0 / 480.0
# Test basics
with pytest.raises(TypeError):
p = PerspectiveCamera()
p = PerspectiveCamera(yfov=yfov)
assert p.yfov == yfov
assert p.znear == 0.05
assert p.zfar is None
assert p.aspectRatio is None
p.name = 'asdf'
p.name = None
with pytest.raises(ValueError):
p.yfov = 0.0
with pytest.raises(ValueError):
p.yfov = -1.0
with pytest.raises(ValueError):
p.znear = -1.0
p.znear = 0.0
p.znear = 0.05
p.zfar = 100.0
assert p.zfar == 100.0
with pytest.raises(ValueError):
p.zfar = 0.03
with pytest.raises(ValueError):
p.zfar = 0.05
p.aspectRatio = 10.0
assert p.aspectRatio == 10.0
with pytest.raises(ValueError):
p.aspectRatio = 0.0
with pytest.raises(ValueError):
p.aspectRatio = -1.0
# Test matrix getting/setting
# NF
p.znear = 0.05
p.zfar = 100
p.aspectRatio = None
with pytest.raises(ValueError):
p.get_projection_matrix()
assert np.allclose(
p.get_projection_matrix(width, height),
np.array([
[1.0 / (width / height * np.tan(yfov / 2.0)), 0.0, 0.0, 0.0],
[0.0, 1.0 / np.tan(yfov / 2.0), 0.0, 0.0],
[0.0, 0.0, (zfar + znear) / (znear - zfar),
(2 * zfar * znear) / (znear - zfar)],
[0.0, 0.0, -1.0, 0.0]
])
)
# NFA
p.aspectRatio = aspectRatio
assert np.allclose(
p.get_projection_matrix(width, height),
np.array([
[1.0 / (aspectRatio * np.tan(yfov / 2.0)), 0.0, 0.0, 0.0],
[0.0, 1.0 / np.tan(yfov / 2.0), 0.0, 0.0],
[0.0, 0.0, (zfar + znear) / (znear - zfar),
(2 * zfar * znear) / (znear - zfar)],
[0.0, 0.0, -1.0, 0.0]
])
)
assert np.allclose(
p.get_projection_matrix(), p.get_projection_matrix(width, height)
)
# N
p.zfar = None
p.aspectRatio = None
assert np.allclose(
p.get_projection_matrix(width, height),
np.array([
[1.0 / (width / height * np.tan(yfov / 2.0)), 0.0, 0.0, 0.0],
[0.0, 1.0 / np.tan(yfov / 2.0), 0.0, 0.0],
[0.0, 0.0, -1.0, -2.0 * znear],
[0.0, 0.0, -1.0, 0.0]
])
)
def test_orthographic_camera():
xm = 1.0
ym = 2.0
n = 0.05
f = 100.0
with pytest.raises(TypeError):
c = OrthographicCamera()
c = OrthographicCamera(xmag=xm, ymag=ym)
assert c.xmag == xm
assert c.ymag == ym
assert c.znear == 0.05
assert c.zfar == 100.0
assert c.name is None
with pytest.raises(TypeError):
c.ymag = None
with pytest.raises(ValueError):
c.ymag = 0.0
with pytest.raises(ValueError):
c.ymag = -1.0
with pytest.raises(TypeError):
c.xmag = None
with pytest.raises(ValueError):
c.xmag = 0.0
with pytest.raises(ValueError):
c.xmag = -1.0
with pytest.raises(TypeError):
c.znear = None
with pytest.raises(ValueError):
c.znear = 0.0
with pytest.raises(ValueError):
c.znear = -1.0
with pytest.raises(ValueError):
c.zfar = 0.01
assert np.allclose(
c.get_projection_matrix(),
np.array([
[1.0 / xm, 0, 0, 0],
[0, 1.0 / ym, 0, 0],
[0, 0, 2.0 / (n - f), (f + n) / (n - f)],
[0, 0, 0, 1.0]
])
)
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