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-rw-r--r--include/astra/GeometryUtil2D.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/astra/GeometryUtil2D.h b/include/astra/GeometryUtil2D.h
index d4ee92e..680cecd 100644
--- a/include/astra/GeometryUtil2D.h
+++ b/include/astra/GeometryUtil2D.h
@@ -31,6 +31,18 @@ $Id$
namespace astra {
+struct SParProjection {
+ // the ray direction
+ float fRayX, fRayY;
+
+ // the start of the (linear) detector
+ float fDetSX, fDetSY;
+
+ // the length of a single detector pixel
+ float fDetUX, fDetUY;
+};
+
+
struct SFanProjection {
// the source
float fSrcX, fSrcY;