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// Copyright 2016 The Draco Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "draco/point_cloud/point_cloud_builder.h"
namespace draco {
PointCloudBuilder::PointCloudBuilder() {}
void PointCloudBuilder::Start(PointIndex::ValueType num_points) {
point_cloud_ = std::unique_ptr<PointCloud>(new PointCloud());
point_cloud_->set_num_points(num_points);
}
int PointCloudBuilder::AddAttribute(GeometryAttribute::Type attribute_type,
int8_t num_components, DataType data_type) {
GeometryAttribute ga;
ga.Init(attribute_type, nullptr, num_components, data_type, false,
DataTypeLength(data_type) * num_components, 0);
return point_cloud_->AddAttribute(ga, true, point_cloud_->num_points());
}
void PointCloudBuilder::SetAttributeValueForPoint(int att_id,
PointIndex point_index,
const void *attribute_value) {
PointAttribute *const att = point_cloud_->attribute(att_id);
att->SetAttributeValue(att->mapped_index(point_index), attribute_value);
}
void PointCloudBuilder::SetAttributeValuesForAllPoints(
int att_id, const void *attribute_values, int stride) {
PointAttribute *const att = point_cloud_->attribute(att_id);
const int data_stride =
DataTypeLength(att->data_type()) * att->num_components();
if (stride == 0) {
stride = data_stride;
}
if (stride == data_stride) {
// Fast copy path.
att->buffer()->Write(0, attribute_values,
point_cloud_->num_points() * data_stride);
} else {
// Copy attribute entries one by one.
for (PointIndex i(0); i < point_cloud_->num_points(); ++i) {
att->SetAttributeValue(
att->mapped_index(i),
static_cast<const uint8_t *>(attribute_values) + stride * i.value());
}
}
}
std::unique_ptr<PointCloud> PointCloudBuilder::Finalize(
bool deduplicate_points) {
if (deduplicate_points) {
#ifdef DRACO_ATTRIBUTE_VALUES_DEDUPLICATION_SUPPORTED
point_cloud_->DeduplicateAttributeValues();
#endif
#ifdef DRACO_ATTRIBUTE_INDICES_DEDUPLICATION_SUPPORTED
point_cloud_->DeduplicatePointIds();
#endif
}
return std::move(point_cloud_);
}
} // namespace draco
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