Differential D10300 Diff 33525 source/blender/nodes/geometry/nodes/node_geo_attribute_sample_texture.cc

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source/blender/nodes/geometry/nodes/node_geo_attribute_sample_texture.cc

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				/*
				* 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 "BLI_compiler_attrs.h"

				#include "DNA_texture_types.h"

				#include "BKE_texture.h"

				#include "RE_texture.h"

				#include "node_geometry_util.hh"

				static bNodeSocketTemplate geo_node_attribute_sample_texture_in[] = {
				{SOCK_GEOMETRY, N_("Geometry")},
				{SOCK_STRING, N_("Mapping")},
				{SOCK_STRING, N_("Result")},
				{-1, ""},
				};

				static bNodeSocketTemplate geo_node_attribute_sample_texture_out[] = {
				{SOCK_GEOMETRY, N_("Geometry")},
				{-1, ""},
				};

				namespace blender::nodes {

				static void execute_on_component(GeometryComponent &component, const GeoNodeExecParams &params)
				{
				const bNode &node = params.node();
				Tex texture = reinterpret_cast<Tex >(node.id);
				const std::string result_attribute_name = params.get_input<std::string>("Result");

				if (texture == nullptr) {
				return;
				}

				const std::string mapping_name = params.get_input<std::string>("Mapping");
				if (!component.attribute_exists(mapping_name)) {
				return;
				}

				OutputAttributePtr attribute_out = component.attribute_try_get_for_output(
				result_attribute_name, ATTR_DOMAIN_POINT, CD_PROP_COLOR);
				if (!attribute_out) {
				return;
				}

				Float3ReadAttribute mapping_attribute = component.attribute_get_for_read<float3>(
				mapping_name, ATTR_DOMAIN_POINT, {0, 0, 0});

				MutableSpan<Color4f> colors = attribute_out->get_span<Color4f>();
				for (const int i : IndexRange(mapping_attribute.size())) {
				TexResult texture_result = {0};
				const float3 position = mapping_attribute[i];
				/* For legacy reasons we have to map [0, 1] to [-1, 1] to support uv mappings. */
				const float3 remapped_position = position * 2.0f - float3(1.0f);
				BKE_texture_get_value(nullptr, texture, remapped_position, &texture_result, false);
				colors[i] = {texture_result.tr, texture_result.tg, texture_result.tb, texture_result.ta};
				}
				attribute_out.apply_span_and_save();
				}

				static void geo_node_attribute_sample_texture_exec(GeoNodeExecParams params)
				{
				GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");

				if (geometry_set.has<MeshComponent>()) {
				execute_on_component(geometry_set.get_component_for_write<MeshComponent>(), params);
				}
				if (geometry_set.has<PointCloudComponent>()) {
				execute_on_component(geometry_set.get_component_for_write<PointCloudComponent>(), params);
				}

				params.set_output("Geometry", geometry_set);
				}

				} // namespace blender::nodes

				void register_node_type_geo_sample_texture()
				{
				static bNodeType ntype;

				geo_node_type_base(&ntype,
				GEO_NODE_ATTRIBUTE_SAMPLE_TEXTURE,
				"Attribute Sample Texture",
				NODE_CLASS_ATTRIBUTE,
				0);
				node_type_size_preset(&ntype, NODE_SIZE_LARGE);
				node_type_socket_templates(
				&ntype, geo_node_attribute_sample_texture_in, geo_node_attribute_sample_texture_out);
				ntype.geometry_node_execute = blender::nodes::geo_node_attribute_sample_texture_exec;
				nodeRegisterType(&ntype);
				}