CameraData Input Cycles Node

----------------------------
reviewed and approved by Brecht 

Important note:
the camera Z is reverted compared to Blender render.
Now it goes from zero (camera) to positive (in front of the camera)

3 files changed, 49 insertions, 1 deletions

diff --git a/intern/cycles/kernel/svm/svm.h b/intern/cycles/kernel/svm/svm.h
index 004875b0de5..443715600ca 100644
--- a/intern/cycles/kernel/svm/svm.h
+++ b/intern/cycles/kernel/svm/svm.h
@@ -126,6 +126,7 @@ CCL_NAMESPACE_END
 #include "svm_convert.h"
 #include "svm_displace.h"
 #include "svm_fresnel.h"
+#include "svm_camera.h"
 #include "svm_geometry.h"
 #include "svm_hsv.h"
 #include "svm_image.h"
@@ -232,6 +233,9 @@ __device_noinline void svm_eval_nodes(KernelGlobals *kg, ShaderData *sd, ShaderT
 				svm_node_tex_magic(kg, sd, stack, node, &offset);
 				break;
 #endif
+			case NODE_CAMERA:
+				svm_node_camera(kg, sd, stack, node.y, node.z, node.w);
+				break;
 			case NODE_GEOMETRY:
 				svm_node_geometry(sd, stack, node.y, node.z);
 				break;
diff --git a/intern/cycles/kernel/svm/svm_camera.h b/intern/cycles/kernel/svm/svm_camera.h
new file mode 100644
index 00000000000..cf161ddcd8c
--- /dev/null
+++ b/intern/cycles/kernel/svm/svm_camera.h
@@ -0,0 +1,43 @@
+/*
+ * 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.
+ */
+
+CCL_NAMESPACE_BEGIN
+
+__device void svm_node_camera(KernelGlobals *kg, ShaderData *sd, float *stack, uint out_vector, uint out_zdepth, uint out_distance)
+{
+	float distance;
+	float zdepth;
+	float3 vector;
+
+	Transform tfm = kernel_data.cam.worldtocamera;
+	vector = transform(&tfm, sd->P);
+	zdepth = vector.z;
+	distance = len(vector);
+
+	if (stack_valid(out_vector))
+		stack_store_float3(stack, out_vector, normalize(vector));
+
+	if (stack_valid(out_zdepth))
+		stack_store_float(stack, out_zdepth, zdepth);
+
+	if (stack_valid(out_distance))
+		stack_store_float(stack, out_distance, distance);
+}
+
+CCL_NAMESPACE_END
+
diff --git a/intern/cycles/kernel/svm/svm_types.h b/intern/cycles/kernel/svm/svm_types.h
index 53bba644e41..fcd345b9359 100644
--- a/intern/cycles/kernel/svm/svm_types.h
+++ b/intern/cycles/kernel/svm/svm_types.h
@@ -82,7 +82,8 @@ typedef enum NodeType {
 	NODE_CLOSURE_VOLUME = 4900,
 	NODE_SEPARATE_RGB = 5000,
 	NODE_COMBINE_RGB = 5100,
-	NODE_HSV = 5200
+	NODE_HSV = 5200,
+	NODE_CAMERA = 5300
 } NodeType;
 
 typedef enum NodeAttributeType {