From e07449189a05e3bcdc8ad4a9fbb95c0751f567bb Mon Sep 17 00:00:00 2001
From: Willem Jan Palenstijn <Willem.Jan.Palenstijn@cwi.nl>
Date: Fri, 4 Dec 2015 15:15:16 +0100
Subject: Add sample for experimental composite geometry code

---
 python/astra/experimental.pyx | 84 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 python/astra/experimental.pyx

(limited to 'python/astra/experimental.pyx')

diff --git a/python/astra/experimental.pyx b/python/astra/experimental.pyx
new file mode 100644
index 0000000..da27504
--- /dev/null
+++ b/python/astra/experimental.pyx
@@ -0,0 +1,84 @@
+#-----------------------------------------------------------------------
+# Copyright: 2010-2015, iMinds-Vision Lab, University of Antwerp
+#            2014-2015, CWI, Amsterdam
+#
+# Contact: astra@uantwerpen.be
+# Website: http://sf.net/projects/astra-toolbox
+#
+# This file is part of the ASTRA Toolbox.
+#
+#
+# The ASTRA Toolbox is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# The ASTRA Toolbox is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
+#
+#-----------------------------------------------------------------------
+
+# distutils: language = c++
+# distutils: libraries = astra
+
+include "config.pxi"
+
+import six
+from .PyIncludes cimport *
+from libcpp.vector cimport vector
+
+cdef extern from "astra/CompositeGeometryManager.h" namespace "astra":
+    cdef cppclass CCompositeGeometryManager:
+        bool doFP(CProjector3D *, vector[CFloat32VolumeData3DMemory *], vector[CFloat32ProjectionData3DMemory *])
+        bool doBP(CProjector3D *, vector[CFloat32VolumeData3DMemory *], vector[CFloat32ProjectionData3DMemory *])
+
+cdef extern from *:
+    CFloat32VolumeData3DMemory * dynamic_cast_vol_mem "dynamic_cast<astra::CFloat32VolumeData3DMemory*>" (CFloat32Data3D * ) except NULL
+    CFloat32ProjectionData3DMemory * dynamic_cast_proj_mem "dynamic_cast<astra::CFloat32ProjectionData3DMemory*>" (CFloat32Data3D * ) except NULL
+
+cimport PyProjector3DManager
+from .PyProjector3DManager cimport CProjector3DManager
+cimport PyData3DManager
+from .PyData3DManager cimport CData3DManager
+
+cdef CProjector3DManager * manProj = <CProjector3DManager * >PyProjector3DManager.getSingletonPtr()
+cdef CData3DManager * man3d = <CData3DManager * >PyData3DManager.getSingletonPtr()
+
+def do_composite(projector_id, vol_ids, proj_ids, t):
+    cdef vector[CFloat32VolumeData3DMemory *] vol
+    cdef CFloat32VolumeData3DMemory * pVolObject
+    cdef CFloat32ProjectionData3DMemory * pProjObject
+    for v in vol_ids:
+        pVolObject = dynamic_cast_vol_mem(man3d.get(v))
+        if pVolObject == NULL:
+            raise Exception("Data object not found")
+        if not pVolObject.isInitialized():
+            raise Exception("Data object not initialized properly")
+        vol.push_back(pVolObject)
+    cdef vector[CFloat32ProjectionData3DMemory *] proj
+    for v in proj_ids:
+        pProjObject = dynamic_cast_proj_mem(man3d.get(v))
+        if pProjObject == NULL:
+            raise Exception("Data object not found")
+        if not pProjObject.isInitialized():
+            raise Exception("Data object not initialized properly")
+        proj.push_back(pProjObject)
+    cdef CCompositeGeometryManager m
+    cdef CProjector3D * projector = manProj.get(projector_id) # may be NULL
+    if t == "FP":
+        if not m.doFP(projector, vol, proj):
+            raise Exception("Failed to perform FP")
+    else:
+        if not m.doBP(projector, vol, proj):
+            raise Exception("Failed to perform BP")
+
+def do_composite_FP(projector_id, vol_ids, proj_ids):
+    do_composite(projector_id, vol_ids, proj_ids, "FP")
+
+def do_composite_BP(projector_id, vol_ids, proj_ids):
+    do_composite(projector_id, vol_ids, proj_ids, "BP")
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