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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_task.hh"
#include "BKE_colorband.h"
#include "UI_interface.h"
#include "UI_resources.h"
#include "node_geometry_util.hh"
static bNodeSocketTemplate geo_node_attribute_color_ramp_in[] = {
{SOCK_GEOMETRY, N_("Geometry")},
{SOCK_STRING, N_("Attribute")},
{SOCK_STRING, N_("Result")},
{-1, ""},
};
static bNodeSocketTemplate geo_node_attribute_color_ramp_out[] = {
{SOCK_GEOMETRY, N_("Geometry")},
{-1, ""},
};
static void geo_node_attribute_color_ramp_layout(uiLayout *layout,
bContext *UNUSED(C),
PointerRNA *ptr)
{
uiTemplateColorRamp(layout, ptr, "color_ramp", false);
}
namespace blender::nodes {
static AttributeDomain get_result_domain(const GeometryComponent &component,
StringRef input_name,
StringRef result_name)
{
/* Use the domain of the result attribute if it already exists. */
std::optional<AttributeMetaData> result_info = component.attribute_get_meta_data(result_name);
if (result_info) {
return result_info->domain;
}
/* Otherwise use the input attribute's domain if it exists. */
std::optional<AttributeMetaData> source_info = component.attribute_get_meta_data(input_name);
if (source_info) {
return source_info->domain;
}
return ATTR_DOMAIN_POINT;
}
static void execute_on_component(const GeoNodeExecParams ¶ms, GeometryComponent &component)
{
const bNode &bnode = params.node();
NodeAttributeColorRamp *node_storage = (NodeAttributeColorRamp *)bnode.storage;
const std::string result_name = params.get_input<std::string>("Result");
const std::string input_name = params.get_input<std::string>("Attribute");
/* Always output a color attribute for now. We might want to allow users to customize.
* Using the type of an existing attribute could work, but does not have a real benefit
* currently. */
const AttributeDomain result_domain = get_result_domain(component, input_name, result_name);
OutputAttribute_Typed<Color4f> attribute_result =
component.attribute_try_get_for_output_only<Color4f>(result_name, result_domain);
if (!attribute_result) {
return;
}
GVArray_Typed<float> attribute_in = component.attribute_get_for_read<float>(
input_name, result_domain, 0.0f);
MutableSpan<Color4f> results = attribute_result.as_span();
ColorBand *color_ramp = &node_storage->color_ramp;
parallel_for(IndexRange(attribute_in.size()), 512, [&](IndexRange range) {
for (const int i : range) {
BKE_colorband_evaluate(color_ramp, attribute_in[i], results[i]);
}
});
attribute_result.save();
}
static void geo_node_attribute_color_ramp_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
geometry_set = geometry_set_realize_instances(geometry_set);
if (geometry_set.has<MeshComponent>()) {
execute_on_component(params, geometry_set.get_component_for_write<MeshComponent>());
}
if (geometry_set.has<PointCloudComponent>()) {
execute_on_component(params, geometry_set.get_component_for_write<PointCloudComponent>());
}
if (geometry_set.has<CurveComponent>()) {
execute_on_component(params, geometry_set.get_component_for_write<CurveComponent>());
}
params.set_output("Geometry", std::move(geometry_set));
}
static void geo_node_attribute_color_ramp_init(bNodeTree *UNUSED(ntree), bNode *node)
{
NodeAttributeColorRamp *node_storage = (NodeAttributeColorRamp *)MEM_callocN(
sizeof(NodeAttributeColorRamp), __func__);
BKE_colorband_init(&node_storage->color_ramp, true);
node->storage = node_storage;
}
} // namespace blender::nodes
void register_node_type_geo_attribute_color_ramp()
{
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_ATTRIBUTE_COLOR_RAMP, "Attribute Color Ramp", NODE_CLASS_ATTRIBUTE, 0);
node_type_socket_templates(
&ntype, geo_node_attribute_color_ramp_in, geo_node_attribute_color_ramp_out);
node_type_storage(
&ntype, "NodeAttributeColorRamp", node_free_standard_storage, node_copy_standard_storage);
node_type_init(&ntype, blender::nodes::geo_node_attribute_color_ramp_init);
node_type_size_preset(&ntype, NODE_SIZE_LARGE);
ntype.geometry_node_execute = blender::nodes::geo_node_attribute_color_ramp_exec;
ntype.draw_buttons = geo_node_attribute_color_ramp_layout;
nodeRegisterType(&ntype);
}
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