Cycles: add Vector Displacement node and extend Displacement node.

This adds midlevel and object/world space for displacement, and a
vector displacement node with tangent/object/world space, midlevel
and scale.

Note that tangent space vector displacement still is not exactly
compatible with maps created by other software, this will require
changes to the tangent computation.

Differential Revision: https://developer.blender.org/D1734

12 files changed, 218 insertions, 35 deletions

diff --git a/source/blender/blenkernel/BKE_node.h b/source/blender/blenkernel/BKE_node.h
index 854a3e64acc..8a736c9952d 100644
--- a/source/blender/blenkernel/BKE_node.h
+++ b/source/blender/blenkernel/BKE_node.h
@@ -791,6 +791,7 @@ struct ShadeResult;
 #define SH_NODE_BSDF_PRINCIPLED         193
 #define SH_NODE_BEVEL                   197
 #define SH_NODE_DISPLACEMENT            198
+#define SH_NODE_VECTOR_DISPLACEMENT     199
 
 /* custom defines options for Material node */
 #define SH_NODE_MAT_DIFF   1
diff --git a/source/blender/blenkernel/intern/node.c b/source/blender/blenkernel/intern/node.c
index 932b8b0c30a..74766bec9a8 100644
--- a/source/blender/blenkernel/intern/node.c
+++ b/source/blender/blenkernel/intern/node.c
@@ -3590,6 +3590,7 @@ static void registerShaderNodes(void)
 	register_node_type_sh_attribute();
 	register_node_type_sh_bevel();
 	register_node_type_sh_displacement();
+	register_node_type_sh_vector_displacement();
 	register_node_type_sh_geometry();
 	register_node_type_sh_light_path();
 	register_node_type_sh_light_falloff();
diff --git a/source/blender/editors/space_node/drawnode.c b/source/blender/editors/space_node/drawnode.c
index bcf06f117aa..eccf3c057d4 100644
--- a/source/blender/editors/space_node/drawnode.c
+++ b/source/blender/editors/space_node/drawnode.c
@@ -1036,7 +1036,7 @@ static void node_shader_buts_normal_map(uiLayout *layout, bContext *C, PointerRN
 {
 	uiItemR(layout, ptr, "space", 0, "", 0);
 
-	if (RNA_enum_get(ptr, "space") == SHD_NORMAL_MAP_TANGENT) {
+	if (RNA_enum_get(ptr, "space") == SHD_SPACE_TANGENT) {
 		PointerRNA obptr = CTX_data_pointer_get(C, "active_object");
 
 		if (obptr.data && RNA_enum_get(&obptr, "type") == OB_MESH) {
@@ -1048,6 +1048,11 @@ static void node_shader_buts_normal_map(uiLayout *layout, bContext *C, PointerRN
 	}
 }
 
+static void node_shader_buts_displacement(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
+{
+	uiItemR(layout, ptr, "space", 0, "", 0);
+}
+
 static void node_shader_buts_tangent(uiLayout *layout, bContext *C, PointerRNA *ptr)
 {
 	uiLayout *split, *row;
@@ -1239,6 +1244,10 @@ static void node_shader_set_butfunc(bNodeType *ntype)
 		case SH_NODE_NORMAL_MAP:
 			ntype->draw_buttons = node_shader_buts_normal_map;
 			break;
+		case SH_NODE_DISPLACEMENT:
+		case SH_NODE_VECTOR_DISPLACEMENT:
+			ntype->draw_buttons = node_shader_buts_displacement;
+			break;
 		case SH_NODE_TANGENT:
 			ntype->draw_buttons = node_shader_buts_tangent;
 			break;
diff --git a/source/blender/gpu/shaders/gpu_shader_material.glsl b/source/blender/gpu/shaders/gpu_shader_material.glsl
index a77e7eb7937..d589c8765e6 100644
--- a/source/blender/gpu/shaders/gpu_shader_material.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_material.glsl
@@ -3827,9 +3827,38 @@ void node_bevel(float radius, vec3 N, out vec3 result)
 	result = N;
 }
 
-void node_displacement(float height, float dist, vec3 N, out vec3 result)
+void node_displacement_object(float height, float midlevel, float scale, vec3 N, mat4 obmat, out vec3 result)
 {
-	result = height * dist * N;
+	N = (vec4(N, 0.0) * obmat).xyz;
+	result = (height - midlevel) * scale * normalize(N);
+	result = (obmat * vec4(result, 0.0)).xyz;
+}
+
+void node_displacement_world(float height, float midlevel, float scale, vec3 N, out vec3 result)
+{
+	result = (height - midlevel) * scale * normalize(N);
+}
+
+void node_vector_displacement_tangent(vec4 vector, float midlevel, float scale, vec4 tangent, vec3 normal, mat4 obmat, mat4 viewmat, out vec3 result)
+{
+	vec3 N_object = normalize(((vec4(normal, 0.0) * viewmat) * obmat).xyz);
+	vec3 T_object = normalize(((vec4(tangent.xyz, 0.0) * viewmat) * obmat).xyz);
+	vec3 B_object = tangent.w * normalize(cross(N_object, T_object));
+
+	vec3 offset = (vector.xyz - vec3(midlevel)) * scale;
+	result = offset.x * T_object + offset.y * N_object + offset.z * B_object;
+	result = (obmat * vec4(result, 0.0)).xyz;
+}
+
+void node_vector_displacement_object(vec4 vector, float midlevel, float scale, mat4 obmat, out vec3 result)
+{
+	result = (vector.xyz - vec3(midlevel)) * scale;
+	result = (obmat * vec4(result, 0.0)).xyz;
+}
+
+void node_vector_displacement_world(vec4 vector, float midlevel, float scale, out vec3 result)
+{
+	result = (vector.xyz - vec3(midlevel)) * scale;
 }
 
 /* output */
diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index e6bc315b728..4dbf3a354ce 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -1029,12 +1029,12 @@ typedef struct NodeSunBeams {
 #define SHD_TANGENT_AXIS_Y			1
 #define SHD_TANGENT_AXIS_Z			2
 
-/* normal map space */
-#define SHD_NORMAL_MAP_TANGENT			0
-#define SHD_NORMAL_MAP_OBJECT			1
-#define SHD_NORMAL_MAP_WORLD			2
-#define SHD_NORMAL_MAP_BLENDER_OBJECT	3
-#define SHD_NORMAL_MAP_BLENDER_WORLD	4
+/* normal map, displacement space */
+#define SHD_SPACE_TANGENT			0
+#define SHD_SPACE_OBJECT			1
+#define SHD_SPACE_WORLD				2
+#define SHD_SPACE_BLENDER_OBJECT	3
+#define SHD_SPACE_BLENDER_WORLD		4
 
 /* math node clamp */
 #define SHD_MATH_CLAMP		1
diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index 33c6cc68763..4225aa38d57 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -4328,11 +4328,11 @@ static void def_sh_uvalongstroke(StructRNA *srna)
 static void def_sh_normal_map(StructRNA *srna)
 {
 	static const EnumPropertyItem prop_space_items[] = {
-		{SHD_NORMAL_MAP_TANGENT, "TANGENT", 0, "Tangent Space", "Tangent space normal mapping"},
-		{SHD_NORMAL_MAP_OBJECT, "OBJECT", 0, "Object Space", "Object space normal mapping"},
-		{SHD_NORMAL_MAP_WORLD, "WORLD", 0, "World Space", "World space normal mapping"},
-		{SHD_NORMAL_MAP_BLENDER_OBJECT, "BLENDER_OBJECT", 0, "Blender Object Space", "Object space normal mapping, compatible with Blender render baking"},
-		{SHD_NORMAL_MAP_BLENDER_WORLD, "BLENDER_WORLD", 0, "Blender World Space", "World space normal mapping, compatible with Blender render baking"},
+		{SHD_SPACE_TANGENT, "TANGENT", 0, "Tangent Space", "Tangent space normal mapping"},
+		{SHD_SPACE_OBJECT, "OBJECT", 0, "Object Space", "Object space normal mapping"},
+		{SHD_SPACE_WORLD, "WORLD", 0, "World Space", "World space normal mapping"},
+		{SHD_SPACE_BLENDER_OBJECT, "BLENDER_OBJECT", 0, "Blender Object Space", "Object space normal mapping, compatible with Blender render baking"},
+		{SHD_SPACE_BLENDER_WORLD, "BLENDER_WORLD", 0, "Blender World Space", "World space normal mapping, compatible with Blender render baking"},
 		{0, NULL, 0, NULL, NULL}
 	};
 
@@ -4352,6 +4352,45 @@ static void def_sh_normal_map(StructRNA *srna)
 	RNA_def_struct_sdna_from(srna, "bNode", NULL);
 }
 
+static void def_sh_displacement(StructRNA *srna)
+{
+	static const EnumPropertyItem prop_space_items[] = {
+		{SHD_SPACE_OBJECT, "OBJECT", 0, "Object Space", "Displacement is in object space, affected by object scale"},
+		{SHD_SPACE_WORLD, "WORLD", 0, "World Space", "Displacement is in world space, not affected by object scale"},
+		{0, NULL, 0, NULL, NULL}
+	};
+
+	PropertyRNA *prop;
+
+	prop = RNA_def_property(srna, "space", PROP_ENUM, PROP_NONE);
+	RNA_def_property_enum_sdna(prop, NULL, "custom1");
+	RNA_def_property_enum_items(prop, prop_space_items);
+	RNA_def_property_ui_text(prop, "Space", "Space of the input height");
+	RNA_def_property_update(prop, 0, "rna_Node_update");
+
+	RNA_def_struct_sdna_from(srna, "bNode", NULL);
+}
+
+static void def_sh_vector_displacement(StructRNA *srna)
+{
+	static const EnumPropertyItem prop_space_items[] = {
+		{SHD_SPACE_TANGENT, "TANGENT", 0, "Tangent Space", "Tagent space vector displacement mapping"},
+		{SHD_SPACE_OBJECT, "OBJECT", 0, "Object Space", "Object space vector displacement mapping"},
+		{SHD_SPACE_WORLD, "WORLD", 0, "World Space", "World space vector displacement mapping"},
+		{0, NULL, 0, NULL, NULL}
+	};
+
+	PropertyRNA *prop;
+
+	prop = RNA_def_property(srna, "space", PROP_ENUM, PROP_NONE);
+	RNA_def_property_enum_sdna(prop, NULL, "custom1");
+	RNA_def_property_enum_items(prop, prop_space_items);
+	RNA_def_property_ui_text(prop, "Space", "Space of the input height");
+	RNA_def_property_update(prop, 0, "rna_Node_update");
+
+	RNA_def_struct_sdna_from(srna, "bNode", NULL);
+}
+
 static void def_sh_tangent(StructRNA *srna)
 {
 	static const EnumPropertyItem prop_direction_type_items[] = {
diff --git a/source/blender/nodes/CMakeLists.txt b/source/blender/nodes/CMakeLists.txt
index f8cbd14a346..1acd1c4ea46 100644
--- a/source/blender/nodes/CMakeLists.txt
+++ b/source/blender/nodes/CMakeLists.txt
@@ -194,6 +194,7 @@ set(SRC
 	shader/nodes/node_shader_tangent.c
 	shader/nodes/node_shader_bevel.c
 	shader/nodes/node_shader_displacement.c
+	shader/nodes/node_shader_vector_displacement.c
 	shader/nodes/node_shader_tex_brick.c
 	shader/nodes/node_shader_tex_checker.c
 	shader/nodes/node_shader_tex_coord.c
diff --git a/source/blender/nodes/NOD_shader.h b/source/blender/nodes/NOD_shader.h
index 9590b0c7944..6ed71e02823 100644
--- a/source/blender/nodes/NOD_shader.h
+++ b/source/blender/nodes/NOD_shader.h
@@ -80,6 +80,7 @@ void register_node_type_sh_tex_pointdensity(void);
 void register_node_type_sh_attribute(void);
 void register_node_type_sh_bevel(void);
 void register_node_type_sh_displacement(void);
+void register_node_type_sh_vector_displacement(void);
 void register_node_type_sh_geometry(void);
 void register_node_type_sh_light_path(void);
 void register_node_type_sh_light_falloff(void);
diff --git a/source/blender/nodes/NOD_static_types.h b/source/blender/nodes/NOD_static_types.h
index 56a34a92b93..2db23c2122d 100644
--- a/source/blender/nodes/NOD_static_types.h
+++ b/source/blender/nodes/NOD_static_types.h
@@ -127,7 +127,8 @@ DefNode( ShaderNode,     SH_NODE_UVALONGSTROKE,      def_sh_uvalongstroke,   "UV
 DefNode( ShaderNode,     SH_NODE_SEPXYZ,             0,                      "SEPXYZ",             SeparateXYZ,      "Separate XYZ",      ""       )
 DefNode( ShaderNode,     SH_NODE_COMBXYZ,            0,                      "COMBXYZ",            CombineXYZ,       "Combine XYZ",       ""       )
 DefNode( ShaderNode,     SH_NODE_BEVEL,              def_sh_bevel,           "BEVEL",              Bevel,            "Bevel",             ""       )
-DefNode( ShaderNode,     SH_NODE_DISPLACEMENT,       0,                      "DISPLACEMENT",       Displacement,     "Displacement",      ""       )
+DefNode( ShaderNode,     SH_NODE_DISPLACEMENT,       def_sh_displacement,    "DISPLACEMENT",       Displacement,     "Displacement",      ""       )
+DefNode( ShaderNode,     SH_NODE_VECTOR_DISPLACEMENT,def_sh_vector_displacement,"VECTOR_DISPLACEMENT",VectorDisplacement,"Vector Displacement",""  )
 
 DefNode( CompositorNode, CMP_NODE_VIEWER,         def_cmp_viewer,         "VIEWER",         Viewer,           "Viewer",            ""              )
 DefNode( CompositorNode, CMP_NODE_RGB,            0,                      "RGB",            RGB,              "RGB",               ""              )
diff --git a/source/blender/nodes/shader/nodes/node_shader_displacement.c b/source/blender/nodes/shader/nodes/node_shader_displacement.c
index bcd11b758f8..e976eaf143a 100644
--- a/source/blender/nodes/shader/nodes/node_shader_displacement.c
+++ b/source/blender/nodes/shader/nodes/node_shader_displacement.c
@@ -31,6 +31,7 @@
 
 static bNodeSocketTemplate sh_node_displacement_in[] = {
 	{	SOCK_FLOAT, 0, N_("Height"), 0.00f, 0.0f, 0.0f, 0.0f, 0.0f, 1000.0f},
+	{	SOCK_FLOAT, 0, N_("Midlevel"), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1000.0f},
 	{	SOCK_FLOAT, 0, N_("Scale"), 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1000.0f},
 	{	SOCK_VECTOR, 1, N_("Normal"), 0.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f, PROP_NONE, SOCK_HIDE_VALUE},
 	{	-1, 0, ""	}
@@ -41,13 +42,30 @@ static bNodeSocketTemplate sh_node_displacement_out[] = {
 	{	-1, 0, ""	}
 };
 
-static int gpu_shader_displacement(GPUMaterial *mat, bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
+static void node_shader_init_displacement(bNodeTree *UNUSED(ntree), bNode *node)
 {
-	if (!in[2].link) {
-		GPU_link(mat, "direction_transform_m4v3", GPU_builtin(GPU_VIEW_NORMAL), GPU_builtin(GPU_INVERSE_VIEW_MATRIX), &in[2].link);
+	node->custom1 = SHD_SPACE_OBJECT; /* space */
+
+	/* Set default value here for backwards compatibility. */
+	for (bNodeSocket *sock = node->inputs.first; sock; sock = sock->next) {
+		if (STREQ(sock->name, "Midlevel")) {
+			((bNodeSocketValueFloat *)sock->default_value)->value = 0.5f;
+		}
 	}
+}
 
-	return GPU_stack_link(mat, "node_displacement", in, out);
+static int gpu_shader_displacement(GPUMaterial *mat, bNode *node, bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
+{
+	if (!in[3].link) {
+		GPU_link(mat, "direction_transform_m4v3", GPU_builtin(GPU_VIEW_NORMAL), GPU_builtin(GPU_INVERSE_VIEW_MATRIX), &in[3].link);
+	}
+
+	if(node->custom1 == SHD_SPACE_OBJECT) {
+		return GPU_stack_link(mat, "node_displacement_object", in, out, GPU_builtin(GPU_OBJECT_MATRIX));
+	}
+	else {
+		return GPU_stack_link(mat, "node_displacement_world", in, out, GPU_builtin(GPU_OBJECT_MATRIX));
+	}
 }
 
 /* node type definition */
@@ -59,6 +77,7 @@ void register_node_type_sh_displacement(void)
 	node_type_compatibility(&ntype, NODE_NEW_SHADING);
 	node_type_socket_templates(&ntype, sh_node_displacement_in, sh_node_displacement_out);
 	node_type_storage(&ntype, "", NULL, NULL);
+	node_type_init(&ntype, node_shader_init_displacement);
 	node_type_gpu(&ntype, gpu_shader_displacement);
 
 	nodeRegisterType(&ntype);
diff --git a/source/blender/nodes/shader/nodes/node_shader_normal_map.c b/source/blender/nodes/shader/nodes/node_shader_normal_map.c
index 36d7522e3e6..7584b5eba4d 100644
--- a/source/blender/nodes/shader/nodes/node_shader_normal_map.c
+++ b/source/blender/nodes/shader/nodes/node_shader_normal_map.c
@@ -68,7 +68,7 @@ static void node_shader_exec_normal_map(
 		float *N = shi->nmapnorm;
 		int uv_index = 0;
 		switch (nm->space) {
-			case SHD_NORMAL_MAP_TANGENT:
+			case SHD_SPACE_TANGENT:
 				if (nm->uv_map[0]) {
 					/* find uv map by name */
 					for (int i = 0; i < shi->totuv; i++) {
@@ -96,8 +96,8 @@ static void node_shader_exec_normal_map(
 				}
 				break;
 
-			case SHD_NORMAL_MAP_OBJECT:
-			case SHD_NORMAL_MAP_BLENDER_OBJECT:
+			case SHD_SPACE_OBJECT:
+			case SHD_SPACE_BLENDER_OBJECT:
 				if (shi->use_world_space_shading) {
 					mul_mat3_m4_v3((float (*)[4])RE_object_instance_get_matrix(shi->obi, RE_OBJECT_INSTANCE_MATRIX_OB), vecIn);
 					mul_mat3_m4_v3((float (*)[4])RE_render_current_get_matrix(RE_VIEWINV_MATRIX), N);
@@ -107,8 +107,8 @@ static void node_shader_exec_normal_map(
 				interp_v3_v3v3(out[0]->vec, N, vecIn, strength);
 				break;
 
-			case SHD_NORMAL_MAP_WORLD:
-			case SHD_NORMAL_MAP_BLENDER_WORLD:
+			case SHD_SPACE_WORLD:
+			case SHD_SPACE_BLENDER_WORLD:
 				if (shi->use_world_space_shading)
 					mul_mat3_m4_v3((float (*)[4])RE_render_current_get_matrix(RE_VIEWINV_MATRIX), N);
 				else
@@ -150,10 +150,10 @@ static int gpu_shader_normal_map(GPUMaterial *mat, bNode *node, bNodeExecData *U
 		/* ******* CYCLES or BLENDER INTERNAL with world space shading flag ******* */
 
 		const char *color_to_normal_fnc_name = "color_to_normal_new_shading";
-		if (nm->space == SHD_NORMAL_MAP_BLENDER_OBJECT || nm->space == SHD_NORMAL_MAP_BLENDER_WORLD || !GPU_material_use_new_shading_nodes(mat))
+		if (nm->space == SHD_SPACE_BLENDER_OBJECT || nm->space == SHD_SPACE_BLENDER_WORLD || !GPU_material_use_new_shading_nodes(mat))
 			color_to_normal_fnc_name = "color_to_blender_normal_new_shading";
 		switch (nm->space) {
-			case SHD_NORMAL_MAP_TANGENT:
+			case SHD_SPACE_TANGENT:
 				GPU_link(mat, "color_to_normal_new_shading", realnorm, &realnorm);
 				GPU_link(mat, "node_normal_map", GPU_attribute(CD_TANGENT, nm->uv_map), negnorm, realnorm, &realnorm);
 				GPU_link(mat, "vec_math_mix", strength, realnorm, GPU_builtin(GPU_VIEW_NORMAL), &out[0].link);
@@ -161,14 +161,14 @@ static int gpu_shader_normal_map(GPUMaterial *mat, bNode *node, bNodeExecData *U
 				GPU_link(mat, "direction_transform_m4v3", out[0].link, GPU_builtin(GPU_INVERSE_VIEW_MATRIX), &out[0].link);
 				GPU_link(mat, "vect_normalize", out[0].link, &out[0].link);
 				return true;
-			case SHD_NORMAL_MAP_OBJECT:
-			case SHD_NORMAL_MAP_BLENDER_OBJECT:
+			case SHD_SPACE_OBJECT:
+			case SHD_SPACE_BLENDER_OBJECT:
 				GPU_link(mat, "direction_transform_m4v3", negnorm, GPU_builtin(GPU_INVERSE_VIEW_MATRIX), &negnorm);
 				GPU_link(mat, color_to_normal_fnc_name, realnorm, &realnorm);
 				GPU_link(mat, "direction_transform_m4v3", realnorm, GPU_builtin(GPU_OBJECT_MATRIX), &realnorm);
 				break;
-			case SHD_NORMAL_MAP_WORLD:
-			case SHD_NORMAL_MAP_BLENDER_WORLD:
+			case SHD_SPACE_WORLD:
+			case SHD_SPACE_BLENDER_WORLD:
 				GPU_link(mat, "direction_transform_m4v3", negnorm, GPU_builtin(GPU_INVERSE_VIEW_MATRIX), &negnorm);
 				GPU_link(mat, color_to_normal_fnc_name, realnorm, &realnorm);
 				break;
@@ -184,15 +184,15 @@ static int gpu_shader_normal_map(GPUMaterial *mat, bNode *node, bNodeExecData *U
 		GPU_link(mat, "vec_math_negate", negnorm, &negnorm);
 
 		switch (nm->space) {
-			case SHD_NORMAL_MAP_TANGENT:
+			case SHD_SPACE_TANGENT:
 				GPU_link(mat, "node_normal_map", GPU_attribute(CD_TANGENT, nm->uv_map), negnorm, realnorm, &realnorm);
 				break;
-			case SHD_NORMAL_MAP_OBJECT:
-			case SHD_NORMAL_MAP_BLENDER_OBJECT:
+			case SHD_SPACE_OBJECT:
+			case SHD_SPACE_BLENDER_OBJECT:
 				GPU_link(mat, "direction_transform_m4v3", realnorm, GPU_builtin(GPU_LOC_TO_VIEW_MATRIX),  &realnorm);
 				break;
-			case SHD_NORMAL_MAP_WORLD:
-			case SHD_NORMAL_MAP_BLENDER_WORLD:
+			case SHD_SPACE_WORLD:
+			case SHD_SPACE_BLENDER_WORLD:
 				GPU_link(mat, "direction_transform_m4v3", realnorm, GPU_builtin(GPU_VIEW_MATRIX),  &realnorm);
 				break;
 		}
diff --git a/source/blender/nodes/shader/nodes/node_shader_vector_displacement.c b/source/blender/nodes/shader/nodes/node_shader_vector_displacement.c
new file mode 100644
index 00000000000..c40377c3d59
--- /dev/null
+++ b/source/blender/nodes/shader/nodes/node_shader_vector_displacement.c
@@ -0,0 +1,82 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2005 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "../node_shader_util.h"
+
+/* **************** OUTPUT ******************** */
+
+static bNodeSocketTemplate sh_node_vector_displacement_in[] = {
+	{	SOCK_RGBA, 0, N_("Vector"), 0.00f, 0.0f, 0.0f, 0.0f, 0.0f, 1000.0f, PROP_NONE, SOCK_HIDE_VALUE},
+	{	SOCK_FLOAT, 0, N_("Midlevel"), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1000.0f},
+	{	SOCK_FLOAT, 0, N_("Scale"), 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1000.0f},
+	{	-1, 0, ""	}
+};
+
+static bNodeSocketTemplate sh_node_vector_displacement_out[] = {
+	{	SOCK_VECTOR, 0, N_("Displacement"), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+
+static void node_shader_init_vector_displacement(bNodeTree *UNUSED(ntree), bNode *node)
+{
+	node->custom1 = SHD_SPACE_TANGENT; /* space */
+}
+
+static int gpu_shader_vector_displacement(GPUMaterial *mat, bNode *node, bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
+{
+	if(node->custom1 == SHD_SPACE_TANGENT) {
+		return GPU_stack_link(mat,
+		                      "node_vector_displacement_tangent",
+		                      in,
+		                      out,
+		                      GPU_attribute(CD_TANGENT, ""),
+		                      GPU_builtin(GPU_VIEW_NORMAL),
+		                      GPU_builtin(GPU_OBJECT_MATRIX),
+		                      GPU_builtin(GPU_VIEW_MATRIX));
+	}
+	else if(node->custom1 == SHD_SPACE_OBJECT) {
+		return GPU_stack_link(mat, "node_vector_displacement_object", in, out, GPU_builtin(GPU_OBJECT_MATRIX));
+	}
+	else {
+		return GPU_stack_link(mat, "node_vector_displacement_world", in, out);
+	}
+}
+
+/* node type definition */
+void register_node_type_sh_vector_displacement(void)
+{
+	static bNodeType ntype;
+
+	sh_node_type_base(&ntype, SH_NODE_VECTOR_DISPLACEMENT, "Vector Displacement", NODE_CLASS_OP_VECTOR, 0);
+	node_type_compatibility(&ntype, NODE_NEW_SHADING);
+	node_type_socket_templates(&ntype, sh_node_vector_displacement_in, sh_node_vector_displacement_out);
+	node_type_storage(&ntype, "", NULL, NULL);
+	node_type_init(&ntype, node_shader_init_vector_displacement);
+	node_type_gpu(&ntype, gpu_shader_vector_displacement);
+
+	nodeRegisterType(&ntype);
+}