Add test for scene.camera.Camera

tests/test_camera.py

@@ -0,0 +1,39 @@
+try:
+    from . import generic as g
+except BaseException:
+    import generic as g
+
+import numpy as np
+
+
+class CameraTests(g.unittest.TestCase):
+
+    def test_K(self):
+        resolution = (320, 240)
+        fovxy = (60, 40)
+        camera = g.trimesh.scene.Camera(
+            resolution=resolution,
+            fovxy=fovxy,
+        )
+        K_expected = np.array([
+            [277.128,       0, 160],
+            [      0, 329.697, 120],
+            [      0,       0,   1],
+        ], dtype=np.float64)
+        np.testing.assert_allclose(camera.K, K_expected, rtol=1e-3)
+
+    def test_consistency(self):
+        resolution = (320, 240)
+        fxfy = None
+        fovxy = (60, 40)
+        camera = g.trimesh.scene.Camera(
+            resolution=resolution,
+            fxfy=None,
+            fovxy=fovxy,
+        )
+        camera = g.trimesh.scene.Camera(
+            resolution=resolution,
+            fxfy=camera.fxfy,
+            fovxy=None
+        )
+        np.testing.assert_allclose(camera.fovxy, fovxy)