From 63594f898b3581b0743b3540a70c30b9b76a0362 Mon Sep 17 00:00:00 2001
From: Willem Jan Palenstijn <Willem.Jan.Palenstijn@cwi.nl>
Date: Tue, 3 Jun 2014 09:05:39 +0000
Subject: Fix FDK_CUDA output scale

---
 cuda/3d/arith3d.cu | 1 +
 cuda/3d/fdk.cu     | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/cuda/3d/arith3d.cu b/cuda/3d/arith3d.cu
index cc96da5..f5badad 100644
--- a/cuda/3d/arith3d.cu
+++ b/cuda/3d/arith3d.cu
@@ -602,6 +602,7 @@ INST_DtoD(opMul)
 INST_DtoD(opAdd)
 INST_DtoD(opDividedBy)
 INST_toD(opInvert)
+INST_FtoD(opMul)
 INST_FtoD(opSet)
 INST_FtoD(opClampMin)
 INST_FtoD(opClampMax)
diff --git a/cuda/3d/fdk.cu b/cuda/3d/fdk.cu
index 45b6a28..d1c23c6 100644
--- a/cuda/3d/fdk.cu
+++ b/cuda/3d/fdk.cu
@@ -40,6 +40,7 @@ $Id$
 #endif
 
 #include "dims3d.h"
+#include "arith3d.h"
 #include "../2d/fft.h"
 
 typedef texture<float, 3, cudaReadModeElementType> texture3D;
@@ -443,6 +444,9 @@ bool FDK(cudaPitchedPtr D_volumeData,
 	if (!ok)
 		return false;
 
+	processVol3D<opMul>(D_volumeData,
+	                  (M_PI / 2.0f) / (float)dims.iProjAngles, dims);
+
 	return true;
 }
 
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