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support ply texcoord #1118

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support ply texcoord #1118

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26 changes: 26 additions & 0 deletions src/draco/io/ply_decoder.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -232,6 +232,32 @@ Status PlyDecoder::DecodeVertexData(const PlyElement *vertex_element) {
}
}

// Decode texcoord data if present.
const PlyProperty *u_prop = vertex_element->GetPropertyByName("u");
if (!u_prop) u_prop = vertex_element->GetPropertyByName("texture_u");

const PlyProperty *v_prop = vertex_element->GetPropertyByName("v");
if (!v_prop) v_prop = vertex_element->GetPropertyByName("texture_v");

if (u_prop != nullptr && v_prop != nullptr) {
// For now, all texcoord properties must be set and of type float32
if (u_prop->data_type() == DT_FLOAT32 && v_prop->data_type() == DT_FLOAT32) {
PlyPropertyReader<float> u_reader(u_prop);
PlyPropertyReader<float> v_reader(v_prop);
GeometryAttribute va;
va.Init(GeometryAttribute::TEX_COORD, nullptr, 2, DT_FLOAT32, false,
sizeof(float) * 2, 0);
const int att_id = out_point_cloud_->AddAttribute(va, true, num_vertices);
for (PointIndex::ValueType i = 0; i < num_vertices; ++i) {
std::array<float, 2> val;
val[0] = u_reader.ReadValue(i);
val[1] = v_reader.ReadValue(i);
out_point_cloud_->attribute(att_id)->SetAttributeValue(
AttributeValueIndex(i), &val[0]);
}
}
}

// Decode color data if present.
int num_colors = 0;
const PlyProperty *const r_prop = vertex_element->GetPropertyByName("red");
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