1 files changed, 54 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_DotproductOperation.cc b/source/blender/compositor/operations/COM_DotproductOperation.cc
new file mode 100644
index 00000000000..5914be21453
--- /dev/null
+++ b/source/blender/compositor/operations/COM_DotproductOperation.cc
@@ -0,0 +1,54 @@
+/*
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright 2011, Blender Foundation.
+ */
+
+#include "COM_DotproductOperation.h"
+
+DotproductOperation::DotproductOperation()
+{
+  this->addInputSocket(COM_DT_VECTOR);
+  this->addInputSocket(COM_DT_VECTOR);
+  this->addOutputSocket(COM_DT_VALUE);
+  this->setResolutionInputSocketIndex(0);
+  this->m_input1Operation = nullptr;
+  this->m_input2Operation = nullptr;
+}
+void DotproductOperation::initExecution()
+{
+  this->m_input1Operation = this->getInputSocketReader(0);
+  this->m_input2Operation = this->getInputSocketReader(1);
+}
+
+void DotproductOperation::deinitExecution()
+{
+  this->m_input1Operation = nullptr;
+  this->m_input2Operation = nullptr;
+}
+
+/** \todo current implementation is the inverse of a dot-product. not 'logically' correct
+ */
+void DotproductOperation::executePixelSampled(float output[4],
+                                              float x,
+                                              float y,
+                                              PixelSampler sampler)
+{
+  float input1[4];
+  float input2[4];
+  this->m_input1Operation->readSampled(input1, x, y, sampler);
+  this->m_input2Operation->readSampled(input2, x, y, sampler);
+  output[0] = -(input1[0] * input2[0] + input1[1] * input2[1] + input1[2] * input2[2]);
+}