Vector Transform node support for GLSL mode and the internal renderer

The Vector Transform node is a useful node which is present in the Cycles renderer.
{F144283}
This patch implements the Vector Transform node for GLSL mode and the internal renderer.

Example: {F273060}

Alexander (Blend4Web Team)

Reviewers: brecht, campbellbarton, sergey

Reviewed By: campbellbarton, sergey

Subscribers: psy-fi, duarteframos, RobM, lightbwk, sergey, AlexKowel, valentin_b4w, Evgeny_Rodygin, yurikovelenov

Projects: #bf_blender:_next

Differential Revision: https://developer.blender.org/D909

1 files changed, 132 insertions, 1 deletions

diff --git a/source/blender/nodes/shader/nodes/node_shader_vectTransform.c b/source/blender/nodes/shader/nodes/node_shader_vectTransform.c
index 4cab9d3ca97..5b6d213703a 100644
--- a/source/blender/nodes/shader/nodes/node_shader_vectTransform.c
+++ b/source/blender/nodes/shader/nodes/node_shader_vectTransform.c
@@ -52,15 +52,146 @@ static void node_shader_init_vect_transform(bNodeTree *UNUSED(ntree), bNode *nod
 	node->storage = vect;
 }
 
+static const float (* const get_matrix_from_to(ShaderCallData *scd, short from, short to))[4]
+{
+	switch (from) {
+		case SHD_VECT_TRANSFORM_SPACE_OBJECT:
+			switch (to) {
+				case SHD_VECT_TRANSFORM_SPACE_OBJECT:
+					return NULL;
+				case SHD_VECT_TRANSFORM_SPACE_WORLD:
+					return RE_object_instance_get_matrix(scd->shi->obi, RE_OBJECT_INSTANCE_MATRIX_OB);
+				case SHD_VECT_TRANSFORM_SPACE_CAMERA:
+					return RE_object_instance_get_matrix(scd->shi->obi, RE_OBJECT_INSTANCE_MATRIX_LOCALTOVIEW);
+			}
+			break;
+		case SHD_VECT_TRANSFORM_SPACE_WORLD:
+			switch (to) {
+				case SHD_VECT_TRANSFORM_SPACE_WORLD:
+					return NULL;
+				case SHD_VECT_TRANSFORM_SPACE_CAMERA:
+					return RE_render_current_get_matrix(RE_VIEW_MATRIX);
+				case SHD_VECT_TRANSFORM_SPACE_OBJECT:
+					return RE_object_instance_get_matrix(scd->shi->obi, RE_OBJECT_INSTANCE_MATRIX_OBINV);
+			}
+			break;
+		case SHD_VECT_TRANSFORM_SPACE_CAMERA:
+			switch (to) {
+				case SHD_VECT_TRANSFORM_SPACE_CAMERA:
+					return NULL;
+				case SHD_VECT_TRANSFORM_SPACE_WORLD:
+					return RE_render_current_get_matrix(RE_VIEWINV_MATRIX);
+				case SHD_VECT_TRANSFORM_SPACE_OBJECT:
+					return RE_object_instance_get_matrix(scd->shi->obi, RE_OBJECT_INSTANCE_MATRIX_LOCALTOVIEWINV);
+			}
+			break;
+	}
+	return NULL;
+}
+
+static void node_shader_exec_vect_transform(void *data, int UNUSED(thread), bNode *node, bNodeExecData *UNUSED(execdata), bNodeStack **in, bNodeStack **out)
+{
+	float vec[4];
+	const float (*mat)[4];
+
+	if (data) {
+		NodeShaderVectTransform *nodeprop = (NodeShaderVectTransform *)node->storage;
+
+		nodestack_get_vec(vec, SOCK_VECTOR, in[0]);
+
+		if (nodeprop->type == SHD_VECT_TRANSFORM_TYPE_POINT)
+			vec[3] = 1.0f;
+		else
+			vec[3] = 0.0f;
+
+		mat = get_matrix_from_to((ShaderCallData *)data, nodeprop->convert_from, nodeprop->convert_to);
+		if (mat) {
+			mul_m4_v4((float(*)[4])mat, vec);
+		}
+
+		if (nodeprop->type == SHD_VECT_TRANSFORM_TYPE_NORMAL)
+			normalize_v3(vec);
+
+		copy_v4_v4(out[0]->vec, vec);
+	}
+}
+
+static GPUNodeLink *get_gpulink_matrix_from_to(short from, short to)
+{
+	switch (from) {
+		case SHD_VECT_TRANSFORM_SPACE_OBJECT:
+			switch (to) {
+				case SHD_VECT_TRANSFORM_SPACE_OBJECT:
+					return NULL;
+				case SHD_VECT_TRANSFORM_SPACE_WORLD:
+					return GPU_builtin(GPU_OBJECT_MATRIX);
+				case SHD_VECT_TRANSFORM_SPACE_CAMERA:
+					return GPU_builtin(GPU_LOC_TO_VIEW_MATRIX);
+			}
+		case SHD_VECT_TRANSFORM_SPACE_WORLD:
+			switch (to) {
+				case SHD_VECT_TRANSFORM_SPACE_WORLD:
+					return NULL;
+				case SHD_VECT_TRANSFORM_SPACE_CAMERA:
+					return GPU_builtin(GPU_VIEW_MATRIX);
+				case SHD_VECT_TRANSFORM_SPACE_OBJECT:
+					return GPU_builtin(GPU_INVERSE_OBJECT_MATRIX);
+			}
+		case SHD_VECT_TRANSFORM_SPACE_CAMERA:
+			switch (to) {
+				case SHD_VECT_TRANSFORM_SPACE_CAMERA:
+					return NULL;
+				case SHD_VECT_TRANSFORM_SPACE_WORLD:
+					return GPU_builtin(GPU_INVERSE_VIEW_MATRIX);
+				case SHD_VECT_TRANSFORM_SPACE_OBJECT:
+					return GPU_builtin(GPU_INVERSE_LOC_TO_VIEW_MATRIX);
+			}
+	}
+	return 0;
+}
+static int gpu_shader_vect_transform(GPUMaterial *mat, bNode *node, bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
+{
+	struct GPUNodeLink *inputlink;
+	struct GPUNodeLink *fromto;
+
+	int ret = 0;
+
+	const char *vtransform = "direction_transform_m4v3";
+	const char *ptransform = "point_transform_m4v3";
+	const char *func_name = 0;
+
+	NodeShaderVectTransform *nodeprop = (NodeShaderVectTransform *)node->storage;
+
+	if (in[0].hasinput)
+		inputlink = in[0].link;
+	else
+		inputlink = GPU_uniform(in[0].vec);
+
+	fromto = get_gpulink_matrix_from_to(nodeprop->convert_from, nodeprop->convert_to);
+
+	func_name = (nodeprop->type == SHD_VECT_TRANSFORM_TYPE_POINT) ? ptransform : vtransform;
+	if (fromto)
+		ret = GPU_link(mat, func_name, inputlink, fromto,  &out[0].link);
+	else
+		ret = GPU_link(mat, "set_rgb", inputlink,  &out[0].link);
+
+	if (nodeprop->type == SHD_VECT_TRANSFORM_TYPE_NORMAL)
+		return GPU_link(mat, "vect_normalize", out[0].link, &out[0].link);
+
+	return ret;
+}
+
 void register_node_type_sh_vect_transform(void)
 {
 	static bNodeType ntype;
 
 	sh_node_type_base(&ntype, SH_NODE_VECT_TRANSFORM, "Vector Transform", NODE_CLASS_CONVERTOR, 0);
-	node_type_compatibility(&ntype, NODE_NEW_SHADING);
+	node_type_compatibility(&ntype, NODE_OLD_SHADING | NODE_NEW_SHADING);
 	node_type_init(&ntype, node_shader_init_vect_transform);
 	node_type_socket_templates(&ntype, sh_node_vect_transform_in, sh_node_vect_transform_out);
 	node_type_storage(&ntype, "NodeShaderVectTransform", node_free_standard_storage, node_copy_standard_storage);
+	node_type_exec(&ntype, NULL, NULL, node_shader_exec_vect_transform);
+	node_type_gpu(&ntype, gpu_shader_vect_transform);
 
 	nodeRegisterType(&ntype);
 }