1 files changed, 57 insertions, 0 deletions
diff --git a/intern/cycles/blender/texture.cpp b/intern/cycles/blender/texture.cpp
new file mode 100644
index 00000000000..43745bb8376
--- /dev/null
+++ b/intern/cycles/blender/texture.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2011-2015 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "blender/texture.h"
+
+CCL_NAMESPACE_BEGIN
+
+namespace {
+
+/* Point density helpers. */
+
+void density_texture_space_invert(float3 &loc, float3 &size)
+{
+  if (size.x != 0.0f)
+    size.x = 0.5f / size.x;
+  if (size.y != 0.0f)
+    size.y = 0.5f / size.y;
+  if (size.z != 0.0f)
+    size.z = 0.5f / size.z;
+
+  loc = loc * size - make_float3(0.5f, 0.5f, 0.5f);
+}
+
+} /* namespace */
+
+void point_density_texture_space(BL::Depsgraph &b_depsgraph,
+                                 BL::ShaderNodeTexPointDensity &b_point_density_node,
+                                 float3 &loc,
+                                 float3 &size)
+{
+  BL::Object b_ob(b_point_density_node.object());
+  if (!b_ob) {
+    loc = zero_float3();
+    size = zero_float3();
+    return;
+  }
+  float3 min, max;
+  b_point_density_node.calc_point_density_minmax(b_depsgraph, &min[0], &max[0]);
+  loc = (min + max) * 0.5f;
+  size = (max - min) * 0.5f;
+  density_texture_space_invert(loc, size);
+}
+
+CCL_NAMESPACE_END