Mercurial > gemma
view pkg/octree/loader.go @ 3678:8f58851927c0
client: make layer factory only return new layer config for individual maps
instead of each time it is invoked. The purpose of the factory was to support multiple maps with individual layers.
But returning a new config each time it is invoked leads to bugs that rely on the layer's state. Now this factory
reuses the same objects it created before, per map.
author | Markus Kottlaender <markus@intevation.de> |
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date | Mon, 17 Jun 2019 17:31:35 +0200 |
parents | 86c7a023400e |
children | f5fce22184da |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package octree import ( "bufio" "bytes" "encoding/binary" "log" "github.com/golang/snappy" ) func loadReader(r *bufio.Reader) (*Tree, error) { tree := new(Tree) if err := binary.Read(r, binary.LittleEndian, &tree.EPSG); err != nil { return nil, err } log.Printf("info: EPSG: %d\n", tree.EPSG) if err := tree.Min.Read(r); err != nil { return nil, err } if err := tree.Max.Read(r); err != nil { return nil, err } log.Printf("info: BBOX: [[%f, %f, %f], [%f, %f, %f]]\n", tree.Min.X, tree.Min.Y, tree.Min.Z, tree.Max.X, tree.Max.Y, tree.Max.Z) var numVertices uint32 if err := binary.Read(r, binary.LittleEndian, &numVertices); err != nil { return nil, err } log.Printf("info: vertices: %d\n", numVertices) vertices := make([]Vertex, numVertices) tree.vertices = vertices for i := range vertices { if err := vertices[i].Read(r); err != nil { return nil, err } } var numTriangles uint32 if err := binary.Read(r, binary.LittleEndian, &numTriangles); err != nil { return nil, err } log.Printf("info: triangles: %d\n", numTriangles) indices := make([]int32, 3*numTriangles) triangles := make([][]int32, numTriangles) tree.triangles = triangles var last int32 for i := range triangles { tri := indices[:3] indices = indices[3:] triangles[i] = tri for j := range tri { v, err := binary.ReadVarint(r) if err != nil { return nil, err } value := int32(v) + last tri[j] = value last = value } } var numNodes uint32 if err := binary.Read(r, binary.LittleEndian, &numNodes); err != nil { return nil, err } log.Printf("info: num nodes: %d\n", numNodes) tree.index = make([]int32, numNodes) entries := tree.index[1:] last = 0 for i := range entries { v, err := binary.ReadVarint(r) if err != nil { return nil, err } value := int32(v) + last entries[i] = value last = value } return tree, nil } func Deserialize(data []byte) (*Tree, error) { return loadReader( bufio.NewReader( snappy.NewReader( bytes.NewReader(data)))) }