1 files changed, 27 insertions, 0 deletions
diff --git a/test/test_ray_intersection.py b/test/test_ray_intersection.py
new file mode 100644
index 0000000..7d0c53c
--- /dev/null
+++ b/test/test_ray_intersection.py
@@ -0,0 +1,27 @@
+import unittest
+import chroma
+import numpy as np
+import os
+from pycuda import gpuarray as ga
+
+class TestRayIntersection(unittest.TestCase):
+    def setUp(self):
+        self.context = chroma.gpu.create_cuda_context()
+        self.module = chroma.gpu.get_cu_module('mesh.h')
+        self.gpu_funcs = chroma.gpu.GPUFuncs(self.module)
+        self.box = chroma.gpu.GPUGeometry(chroma.build(chroma.make.cube()))
+
+        pos, dir = chroma.project.from_film()
+        self.pos_gpu = ga.to_gpu(chroma.gpu.to_float3(pos))
+        self.dir_gpu = ga.to_gpu(chroma.gpu.to_float3(dir))
+
+        testdir = os.path.dirname(os.path.abspath(chroma.tests.__file__))
+        self.dx_standard = np.load(os.path.join(testdir,
+                                                'data/ray_intersection.npz'))
+    def test_intersection_distance(self):
+        dx = ga.zeros(self.pos_gpu.size, dtype=np.float32)
+        self.gpu_funcs.distance_to_mesh(np.int32(self.pos_gpu.size), self.pos_gpu, self.dir_gpu, self.box.gpudata, dx, block=(64,1,1), grid=(self.pos_gpu.size//64+1,1))
+        self.assertTrue((dx.get() == self.dx_standard).all())
+
+    def tearDown(self):
+        self.context.pop()