From a783d67e08b576676d5b4f616df06a8578531ae8 Mon Sep 17 00:00:00 2001
From: bhklein <ben@rankone.io>
Date: Wed, 16 Sep 2015 23:19:56 -0400
Subject: [PATCH] IPD metadataTransform

---
 openbr/plugins/metadata/ipd.cpp | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+), 0 deletions(-)
 create mode 100644 openbr/plugins/metadata/ipd.cpp

diff --git a/openbr/plugins/metadata/ipd.cpp b/openbr/plugins/metadata/ipd.cpp
new file mode 100644
index 0000000..797900e
--- /dev/null
+++ b/openbr/plugins/metadata/ipd.cpp
@@ -0,0 +1,63 @@
+#include <openbr/plugins/openbr_internal.h>
+#include <cmath>
+
+namespace br
+{
+
+/*!
+ * \ingroup transforms
+ * \brief Calculate interpupillary distance or the distance between two arbitrary points.
+ * \author Ben Klein \cite bhklein
+ * \br_property bool named Are the points named?
+ * \br_property QString firstEye First point's metadata key.
+ * \br_property QString secondEye Second point's metadata key.
+ * \br_property QString key Metadata key for distance.
+ * \br_property QList<int> indices Indices of points in metadata if not named.
+ */
+class IPDTransform : public UntrainableMetadataTransform
+{
+    Q_OBJECT
+
+
+    Q_PROPERTY(bool named READ get_named WRITE set_named RESET reset_named STORED false)
+    Q_PROPERTY(QString firstEye READ get_firstEye WRITE set_firstEye RESET reset_firstEye STORED false)
+    Q_PROPERTY(QString secondEye READ get_secondEye WRITE set_secondEye RESET reset_secondEye STORED false)
+    Q_PROPERTY(QString key READ get_key WRITE set_key RESET reset_key STORED false)
+    Q_PROPERTY(QList<int> indices READ get_indices WRITE set_indices RESET reset_indices STORED false)
+    BR_PROPERTY(bool, named, true)
+    BR_PROPERTY(QString, firstEye, "First_Eye")
+    BR_PROPERTY(QString, secondEye, "Second_Eye")
+    BR_PROPERTY(QString, key, "IPD")
+    BR_PROPERTY(QList<int>, indices, QList<int>())
+
+    void projectMetadata(const File &src, File &dst) const
+    {
+        dst = src;
+        if (!indices.empty()) {
+            if (indices.size() != 2) {
+                qDebug() << "Indices must be of length 2 to calculate IPD!";
+                return;
+            }
+
+            QPointF first = src.points()[indices[0]];
+            QPointF second = src.points()[indices[1]];
+            float distX = second.x() - first.x();
+            float distY = second.y() - first.y();
+            float distance = std::sqrt(distX*distX + distY*distY);
+            dst.set(key, distance);
+        } else {
+            QPointF first = src.get<QPointF>(firstEye, QPointF());
+            QPointF second = src.get<QPointF>(secondEye, QPointF());
+            float distX = second.x() - first.x();
+            float distY = second.y() - first.y();
+            float distance = std::sqrt(distX*distX + distY*distY);
+            dst.set(key, distance);
+        }
+    }
+};
+
+BR_REGISTER(Transform, IPDTransform)
+
+} // namespace br
+
+#include "metadata/ipd.moc"
--
libgit2 0.21.4