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annotate pkg/mesh/classbreaks.go @ 5415:4ad68ab239b7 marking-single-beam

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Factored creation of default class breaks in SR import to be reused with markings, too.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 07 Jul 2021 12:01:28 +0200
parents 99f32f0dc70c
children b8d5f1cd15fb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2019 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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14 package mesh
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15
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16 import (
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17 "context"
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18 "database/sql"
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19 "errors"
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20 "math"
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21 "sort"
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22 "strconv"
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23 "strings"
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24
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25 "gemma.intevation.de/gemma/pkg/common"
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26 )
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27
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28 const (
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29 selectClassBreaksSQL = `
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30 SELECT config_val FROM sys_admin.system_config
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31 WHERE config_key = $1`
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32 )
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33
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34 type ClassBreaks []float64
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35
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36 func SampleDiffHeights(min, max, step float64) ClassBreaks {
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37 var heights ClassBreaks
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38 switch {
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39 case min >= 0: // All values positive.
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40 for v := 0.0; v <= max; v += step {
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41 if v >= min {
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42 heights = append(heights, v)
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43 }
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44 }
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45 case max <= 0: // All values negative.
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46 for v := 0.0; v >= min; v -= step {
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47 if v <= max {
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48 heights = append(heights, v)
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49 }
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50 }
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51 default: // Positive and negative.
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52 for v := step; v <= max; v += step {
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53 heights = append(heights, v)
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54 }
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55 for i, j := 0, len(heights)-1; i < j; i, j = i+1, j-1 {
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56 heights[i], heights[j] = heights[j], heights[i]
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57 }
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58 for v := 0.0; v >= min; v -= step {
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59 heights = append(heights, v)
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60 }
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61 }
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62 return heights
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63 }
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64
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65 func ParseClassBreaks(config string) (ClassBreaks, error) {
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66
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67 parts := strings.Split(config, ",")
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68 classes := make(ClassBreaks, 0, len(parts))
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69 for _, part := range parts {
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70 if idx := strings.IndexRune(part, ':'); idx >= 0 {
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71 part = part[:idx]
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72 }
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73 if part = strings.TrimSpace(part); part == "" {
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74 continue
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75 }
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76 v, err := strconv.ParseFloat(part, 64)
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77 if err != nil {
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78 return nil, err
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79 }
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80 classes = append(classes, v)
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81 }
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82
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83 sort.Float64s(classes)
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84 return classes, nil
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85 }
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86
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87 func LoadClassBreaks(ctx context.Context, tx *sql.Tx, key string) (ClassBreaks, error) {
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88
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89 var config sql.NullString
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90
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91 err := tx.QueryRowContext(ctx, selectClassBreaksSQL, key).Scan(&config)
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92
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93 switch {
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94 case err == sql.ErrNoRows:
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95 return nil, nil
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96 case err != nil:
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97 return nil, err
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98 case !config.Valid:
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99 return nil, errors.New("invalid config string")
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100 }
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101
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102 return ParseClassBreaks(config.String)
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103 }
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104
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105 func round(v float64) float64 {
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106 return math.Round(v*10000) / 10000
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107 }
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108
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109 func (cbs ClassBreaks) ExtrapolateClassBreaks(min, max float64) ClassBreaks {
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110 if min > max {
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111 min, max = max, min
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112 }
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113
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114 n := make(ClassBreaks, len(cbs))
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115 copy(n, cbs)
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116 sort.Float64s(n)
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117
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118 for len(n) > 0 && n[0] < min {
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119 n = n[1:]
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120 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
121
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
122 if len(n) == 0 {
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
123 return n
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
124 }
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
125
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
126 for len(n) > 0 && n[len(n)-1] > max {
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
127 n = n[:len(n)-1]
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
128 }
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
129
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
130 if len(n) == 0 {
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
131 return n
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
132 }
7a9388943840 morphology: Clip class breaks again Z min and max of the the height model.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4214
diff changeset
133
3882
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
134 for min < n[0] {
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
135 diff := n[1] - n[0]
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
136 if diff == 0 {
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
137 break
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
138 }
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
139 m := make([]float64, len(n)+1)
4746
5e0041fd3cba Round height values of extrapolated classbreaks to four place behind the dot.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4687
diff changeset
140 m[0] = round(n[0] - diff)
3882
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
141 copy(m[1:], n)
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
142 n = m
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
143 }
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
144
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
145 for max > n[len(n)-1] {
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
146 diff := n[len(n)-1] - n[len(n)-2]
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
147 if diff == 0 {
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
148 break
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
149 }
4746
5e0041fd3cba Round height values of extrapolated classbreaks to four place behind the dot.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4687
diff changeset
150 n = append(n, round(n[len(n)-1]+diff))
3882
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
151 }
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
152
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
153 return n
37d5c4441c70 Use custom morpho class breaks in sounding result contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3836
diff changeset
154 }
5412
34bc6041e61e Added a type for class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4847
diff changeset
155
34bc6041e61e Added a type for class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4847
diff changeset
156 func (cbs ClassBreaks) Dedup() ClassBreaks {
34bc6041e61e Added a type for class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4847
diff changeset
157 return ClassBreaks(common.DedupFloat64s(cbs))
34bc6041e61e Added a type for class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4847
diff changeset
158 }
5413
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
159
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
160 func (cbs ClassBreaks) Classify(points func() (Vertex, bool)) []MultiPointZ {
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
161 classes := make([]MultiPointZ, len(cbs)+1)
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
162 for v, ok := points(); ok; v, ok = points() {
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
163 idx := len(cbs)
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
164 for i, cb := range cbs {
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
165 if v.Z <= cb {
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
166 idx = i
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
167 break
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
168 }
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
169 }
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
170 classes[idx] = append(classes[idx], v)
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
171 }
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
172 return classes
99f32f0dc70c Added tools to classify vertices by their heights with class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5412
diff changeset
173 }