Mercurial > gemma
view pkg/octree/contours.go @ 2549:9bf6b767a56a
client: refactored and improved splitscreen for diagrams
To make different diagrams possible, the splitscreen view needed to be decoupled from the cross profiles.
Also the style has changed to make it more consistent with the rest of the app. The standard box header
is now used and there are collapse and expand animations.
author | Markus Kottlaender <markus@intevation.de> |
---|---|
date | Fri, 08 Mar 2019 08:50:47 +0100 |
parents | 45d51a49f191 |
children | 647a58ee9ae9 |
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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> // * 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()) } }