1 files changed, 50 insertions, 0 deletions
diff --git a/sunrise.py b/sunrise.py
new file mode 100644
index 0000000..b7b2cd3
--- /dev/null
+++ b/sunrise.py
@@ -0,0 +1,50 @@
+import numpy
+import matplotlib.pyplot as plt
+from string import Template
+
+import pyopencl as cl
+from pyopencl.cltypes import make_double3
+
+mf = cl.mem_flags
+
+from planets import earth
+
+config = {
+    'size_x': 480,
+    'size_y': 270,
+
+    'ray_samples'  : 64,
+    'light_samples': 32,
+
+    'exposure': 20.0,
+
+    'eye_pos': (0, 0, 1.00001),
+    'eye_dir': (0, 1, 0.3)
+}
+
+cl_platform = cl.get_platforms()[0]
+cl_context = cl.Context(properties=[(cl.context_properties.PLATFORM, cl_platform)])
+cl_queue   = cl.CommandQueue(cl_context)
+
+cl_picture = cl.Buffer(cl_context, mf.WRITE_ONLY, size=config['size_x']*config['size_y']*3*numpy.float64(0).nbytes)
+program = None
+
+with open('raymarch.cl') as f:
+    program = cl.Program(cl_context, Template(f.read()).substitute(
+        {**config, **earth}
+    )).build()
+
+for i in range(-10,10):
+    sun = make_double3(0.0,numpy.cos(i*2*numpy.pi/360),numpy.sin(i*2*numpy.pi/360))
+    print(sun)
+
+    program.render(
+        cl_queue, (config['size_x'], config['size_y']), None, cl_picture,
+        make_double3(*config['eye_pos']),
+        make_double3(*config['eye_dir']),
+        sun)
+
+    np_picture = numpy.ndarray(shape=(config['size_y'], config['size_x'], 3), dtype=numpy.float64)
+    cl.enqueue_copy(cl_queue, np_picture, cl_picture).wait();
+
+    plt.imsave('sky_%03d.png' % (i+10), np_picture, origin='lower')