Mercurial > gemma
view pkg/octree/contours.go @ 4488:bff6c5c1db4f
client: pdf-gen: improve adding bottleneck info to pdf
* Check if the bottleneck is in the current view to add its info to the exported pdf and the pdf filename, this avoid wrong filename and wrong info in pdf in case view has been changed to another location.
* Set the bottleneck to print after moving to it in map.
author | Fadi Abbud <fadi.abbud@intevation.de> |
---|---|
date | Fri, 27 Sep 2019 11:15:02 +0200 |
parents | 631f5eaf29de |
children |
line wrap: on
line source
// 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> // * Tom Gottfried <tom.gottfried@intevation.de> package octree import ( "runtime" "sync" ) // ContourResult stores an calculated iso line for a given height. // Is used as a future variable in the concurrent iso line calculation. type ContourResult struct { Height float64 Lines MultiLineStringZ done bool mu sync.Mutex cond *sync.Cond } // NewContourResult prepares a future variable to later hold // the result of the iso line calculation. func NewContourResult(height float64) *ContourResult { cr := ContourResult{Height: height} cr.cond = sync.NewCond(&cr.mu) return &cr } func (cr *ContourResult) wait() { cr.cond.L.Lock() for !cr.done { cr.cond.Wait() } cr.cond.L.Unlock() } func (cr *ContourResult) get() float64 { cr.cond.L.Lock() defer cr.cond.L.Unlock() return cr.Height } func (cr *ContourResult) set(lines MultiLineStringZ) { cr.cond.L.Lock() defer cr.cond.L.Unlock() cr.Lines = lines cr.done = true cr.cond.Signal() } // DoContours calculates the iso line for the given heights. // This is done concurrently. // It is guaranteed that the results are given to the store // function in order of the original heights values. func DoContours(tree *Tree, heights []float64, store func(*ContourResult)) { if len(heights) == 0 { return } contours := make([]*ContourResult, len(heights)) for i, h := range heights { contours[i] = NewContourResult(h) } jobs := make(chan *ContourResult) var wg sync.WaitGroup for i, n := 0, runtime.NumCPU(); i < n; i++ { wg.Add(1) go processLevels(tree, jobs, &wg) } done := make(chan struct{}) go func() { defer close(done) for _, cr := range contours { cr.wait() store(cr) } }() for _, cr := range contours { jobs <- cr } close(jobs) wg.Wait() <-done } func processLevels( tree *Tree, jobs <-chan *ContourResult, wg *sync.WaitGroup, ) { defer wg.Done() for cr := range jobs { var lines MultiLineStringZ h := cr.get() tree.Horizontal(h, func(t *Triangle) { line := t.IntersectHorizontal(h) if len(line) > 1 { lines = append(lines, line) } }) cr.set(lines.Merge()) } }