1 files changed, 103 insertions, 0 deletions
diff --git a/intern/cycles/subd/subd_stencil.cpp b/intern/cycles/subd/subd_stencil.cpp
new file mode 100644
index 00000000000..599a745eebb
--- /dev/null
+++ b/intern/cycles/subd/subd_stencil.cpp
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * 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.
+ */
+
+#include "subd_stencil.h"
+
+#include "util_debug.h"
+#include "util_math.h"
+
+CCL_NAMESPACE_BEGIN
+
+StencilMask::StencilMask()
+{
+}
+
+StencilMask::StencilMask(int size)
+{
+	/* initialize weights to zero. */
+	weights.resize(size, 0.0f);
+}
+
+void StencilMask::resize(int size)
+{
+	weights.resize(size, 0.0f);
+}
+
+StencilMask& StencilMask::operator=(float value)
+{
+	const int size = weights.size();
+	for(int i = 0; i < size; i++)
+		weights[i] = value;
+
+	return *this;
+}
+
+void StencilMask::operator+=(const StencilMask& mask)
+{
+	assert(mask.size() == size());
+	
+	const int size = weights.size();
+	for(int i = 0; i < size; i++)
+		weights[i] += mask.weights[i];
+}
+
+void StencilMask::operator-=(const StencilMask& mask)
+{
+	assert(mask.size() == size());
+	
+	const int size = weights.size();
+	for(int i = 0; i < size; i++)
+		weights[i] -= mask.weights[i];
+}
+
+void StencilMask::operator*=(float scale)
+{
+	const int size = weights.size();
+
+	for(int i = 0; i < size; i++)
+		weights[i] *= scale;
+}
+
+void StencilMask::operator/=(float scale)
+{
+	*this *= 1.0f/scale;
+}
+
+float StencilMask::sum() const
+{
+	float total = 0.0f;
+	const int size = weights.size();
+
+	for(int i = 0; i < size; i++)
+		total += weights[i];
+	
+	return total;
+}
+
+bool StencilMask::is_normalized() const
+{
+	return fabsf(sum() - 1.0f) < 0.0001f;
+}
+
+void StencilMask::normalize()
+{
+	*this /= sum();
+}
+
+CCL_NAMESPACE_END
+