Total Complexity | 76 |
Total Lines | 538 |
Duplicated Lines | 0 % |
Changes | 7 | ||
Bugs | 0 | Features | 1 |
Complex classes like Point often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Point, and based on these observations, apply Extract Interface, too.
1 | <?php |
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12 | class Point extends Geometry |
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13 | { |
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14 | |||
15 | /** |
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16 | * @var float|null |
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17 | */ |
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18 | public $x = null; |
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19 | |||
20 | /** |
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21 | * @var float|null |
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22 | */ |
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23 | public $y = null; |
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24 | |||
25 | /** |
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26 | * @var float|null |
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27 | */ |
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28 | public $z = null; |
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29 | |||
30 | /** |
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31 | * @var float|null |
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32 | */ |
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33 | public $m = null; |
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34 | |||
35 | /** |
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36 | * Constructor |
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37 | * |
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38 | * @param mixed $x The x coordinate (or longitude) |
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39 | * @param mixed $y The y coordinate (or latitude) |
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40 | * @param mixed $z The z coordinate (or altitude) - optional |
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41 | * @param mixed $m Measure - optional |
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42 | * @throws InvalidGeometryException |
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43 | */ |
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44 | public function __construct($x = null, $y = null, $z = null, $m = null) |
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45 | { |
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46 | // If X or Y is null than it is an empty point |
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47 | if ($x !== null && $y !== null) { |
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48 | // Basic validation on x and y |
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49 | if (!is_numeric($x) || !is_numeric($y)) { |
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50 | throw new InvalidGeometryException("Cannot construct Point. x and y should be numeric"); |
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51 | } |
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52 | |||
53 | // Convert to float in case they are passed in as a string or integer etc. |
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54 | $this->x = floatval($x); |
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55 | $this->y = floatval($y); |
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56 | |||
57 | // Check to see if this point has Z (height) value |
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58 | if ($z !== null) { |
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59 | if (!is_numeric($z)) { |
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60 | throw new InvalidGeometryException("Cannot construct Point. z should be numeric"); |
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61 | } |
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62 | $this->z = floatval($z); |
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63 | } |
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64 | |||
65 | // Check to see if this is a measure |
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66 | if ($m !== null) { |
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67 | if (!is_numeric($m)) { |
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68 | throw new InvalidGeometryException("Cannot construct Point. m should be numeric"); |
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69 | } |
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70 | $this->m = floatval($m); |
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71 | } |
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72 | } |
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73 | } |
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74 | |||
75 | /** |
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76 | * @param array<mixed> $coordinates |
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77 | * @return Point |
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78 | * @throws InvalidGeometryException |
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79 | */ |
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80 | public static function fromArray(array $coordinates) |
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81 | { |
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82 | /** @noinspection PhpIncompatibleReturnTypeInspection */ |
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83 | return (new \ReflectionClass(get_called_class()))->newInstanceArgs($coordinates); |
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84 | } |
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85 | |||
86 | /** |
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87 | * @return string "Point" |
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88 | */ |
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89 | public function geometryType(): string |
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90 | { |
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91 | return Geometry::POINT; |
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92 | } |
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93 | |||
94 | /** |
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95 | * @return int 0 |
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96 | */ |
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97 | public function dimension(): int |
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98 | { |
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99 | return 0; |
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100 | } |
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101 | |||
102 | /** |
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103 | * Get X (longitude) coordinate |
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104 | * |
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105 | * @return float|null The X coordinate |
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106 | */ |
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107 | public function getX() |
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108 | { |
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109 | return $this->x ?? null; |
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110 | } |
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111 | |||
112 | /** |
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113 | * Returns Y (latitude) coordinate |
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114 | * |
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115 | * @return float|null The Y coordinate |
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116 | */ |
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117 | public function getY() |
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118 | { |
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119 | return $this->y ?? null; |
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120 | } |
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121 | |||
122 | /** |
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123 | * Returns Z (altitude) coordinate |
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124 | * |
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125 | * @return float|null The Z coordinate or NULL if it is not a 3D point. |
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126 | */ |
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127 | public function getZ() |
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128 | { |
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129 | return $this->z ?? null; |
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130 | } |
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131 | |||
132 | /** |
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133 | * Returns M (measured) value |
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134 | * |
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135 | * @return float|null The measured value |
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136 | */ |
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137 | public function getM() |
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138 | { |
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139 | return $this->m ?? null; |
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140 | } |
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141 | |||
142 | /** |
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143 | * check if Geometry has a measure value |
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144 | * |
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145 | * @return bool true if collection has measure values |
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146 | */ |
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147 | public function isMeasured(): bool |
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150 | } |
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151 | |||
152 | /** |
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153 | * check if Geometry has Z (altitude) coordinate |
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154 | * |
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155 | * @return bool true if geometry has a Z-value |
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156 | */ |
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157 | public function hasZ(): bool |
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158 | { |
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159 | return $this->getZ() !== null; |
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160 | } |
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161 | |||
162 | /** |
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163 | * Inverts x and y coordinates |
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164 | * Useful if old applications still use lng lat |
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165 | * |
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166 | * @return self |
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167 | * */ |
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168 | public function invertXY() |
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169 | { |
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170 | $x = $this->x; |
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171 | $this->x = $this->y; |
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172 | $this->y = $x; |
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173 | $this->setGeos(null); |
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174 | return $this; |
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175 | } |
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176 | |||
177 | /** |
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178 | * A point's centroid is itself |
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179 | * |
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180 | * @return Point object itself |
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181 | */ |
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182 | public function getCentroid(): Point |
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183 | { |
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184 | return $this; |
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185 | } |
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186 | |||
187 | /** |
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188 | * @return array{'minx'?:float|null, 'miny'?:float|null, 'maxx'?:float|null, 'maxy'?:float|null} |
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189 | */ |
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190 | public function getBBox(): array |
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191 | { |
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192 | if ($this->isEmpty()) { |
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193 | return []; |
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194 | } |
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195 | |||
196 | return [ |
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197 | 'maxy' => $this->getY(), |
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198 | 'miny' => $this->getY(), |
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199 | 'maxx' => $this->getX(), |
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200 | 'minx' => $this->getX(), |
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201 | ]; |
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202 | } |
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203 | |||
204 | /** |
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205 | * @return array<int, mixed> |
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206 | */ |
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207 | public function asArray(): array |
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208 | { |
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209 | if ($this->isEmpty()) { |
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210 | return [null, null]; |
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211 | } |
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212 | if (!$this->hasZ()) { |
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213 | return !$this->isMeasured() ? [$this->x, $this->y] : [$this->x, $this->y, null, $this->m]; |
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214 | } |
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215 | |||
216 | return !$this->isMeasured() ? [$this->x, $this->y, $this->z] : [$this->x, $this->y, $this->z, $this->m]; |
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217 | } |
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218 | |||
219 | /** |
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220 | * The boundary of a Point is the empty set. |
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221 | * |
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222 | * @return GeometryCollection |
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223 | */ |
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224 | public function boundary(): Geometry |
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225 | { |
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226 | return new GeometryCollection(); |
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227 | } |
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228 | |||
229 | /** |
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230 | * @return bool |
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231 | */ |
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232 | public function isEmpty(): bool |
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233 | { |
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234 | return $this->x === null; |
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235 | } |
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236 | |||
237 | /** |
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238 | * @return int Returns always 1 |
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239 | */ |
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240 | public function numPoints(): int |
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241 | { |
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242 | return 1; |
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243 | } |
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244 | |||
245 | /** |
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246 | * @return Point[] |
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247 | */ |
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248 | public function getPoints(): array |
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249 | { |
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250 | return [$this]; |
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251 | } |
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252 | |||
253 | /** |
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254 | * @return Point[] |
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255 | */ |
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256 | public function getComponents(): array |
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257 | { |
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258 | return [$this]; |
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259 | } |
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260 | |||
261 | /** |
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262 | * Determines weather the specified geometry is spatially equal to this Point |
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263 | * |
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264 | * Because of limited floating point precision in PHP, equality can be only approximated |
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265 | * |
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266 | * @see: http://php.net/manual/en/function.bccomp.php |
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267 | * @see: http://php.net/manual/en/language.types.float.php |
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268 | * |
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269 | * @param Point|Geometry $geometry |
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270 | * |
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271 | * @return bool |
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272 | */ |
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273 | public function equals(Geometry $geometry): bool |
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274 | { |
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275 | return $geometry->geometryType() === Geometry::POINT |
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276 | ? (abs(($this->getX() ?? 0) - ($geometry->getX() ?? 0)) <= 1.0E-9 && |
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277 | abs(($this->getY() ?? 0) - ($geometry->getY() ?? 0)) <= 1.0E-9 && |
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278 | abs(($this->getZ() ?? 0) - ($geometry->getZ() ?? 0)) <= 1.0E-9) |
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279 | : false; |
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280 | } |
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281 | |||
282 | /** |
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283 | * @return bool always true |
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284 | */ |
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285 | public function isSimple(): bool |
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286 | { |
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287 | return true; |
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288 | } |
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289 | |||
290 | /** |
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291 | * @return bool |
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292 | */ |
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293 | public function isValid(): bool |
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296 | } |
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297 | |||
298 | /** |
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299 | * resets/empties all values |
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300 | * @return void |
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301 | */ |
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302 | public function flatten() |
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307 | } |
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308 | |||
309 | /** |
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310 | * @param Geometry|Collection $geometry |
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311 | * @return float|null |
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312 | */ |
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313 | public function distance(Geometry $geometry) |
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314 | { |
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315 | if ($this->isEmpty() || $geometry->isEmpty()) { |
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316 | return null; |
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317 | } |
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318 | |||
319 | // use GEOS if available |
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320 | $geosObj = $this->getGeos(); |
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321 | if (is_object($geosObj)) { |
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322 | // @codeCoverageIgnoreStart |
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323 | /** @noinspection PhpUndefinedMethodInspection */ |
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324 | $geosObj2 = $geometry->getGeos(); |
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325 | return is_object($geosObj2) ? $geosObj->distance($geosObj2) : null; |
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326 | // @codeCoverageIgnoreEnd |
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327 | } |
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328 | |||
329 | switch ($geometry->geometryType()) { |
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330 | // Point |
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331 | case Geometry::POINT: |
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332 | return sqrt( |
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333 | pow(($this->getX() - $geometry->getX()), 2) + |
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334 | pow(($this->getY() - $geometry->getY()), 2) |
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335 | ); |
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336 | |||
337 | // MultiPoint, GeometryCollection |
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338 | case Geometry::MULTI_POINT: |
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339 | case Geometry::GEOMETRY_COLLECTION: |
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340 | return $this->distanceToMultiPointOrCollection($geometry); |
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341 | |||
342 | // LineString, Polygon, MultiLineString, MultiPolygon. |
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343 | default: |
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344 | return $this->distanceToMultiGeometry($geometry); |
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345 | } |
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346 | } |
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347 | |||
348 | /** |
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349 | * @param Geometry|Collection $geometry |
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350 | * @return float|null |
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351 | */ |
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352 | private function distanceToMultiPointOrCollection($geometry) |
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353 | { |
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354 | $distance = null; |
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355 | foreach ($geometry->getComponents() as $component) { |
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356 | $checkDistance = $this->distance($component); |
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357 | if ($checkDistance === 0.0) { |
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358 | return 0.0; |
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359 | } |
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360 | if ($checkDistance === null) { |
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361 | continue; |
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362 | } |
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363 | $distance = $distance ?? $checkDistance; |
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364 | |||
365 | if ($checkDistance < $distance) { |
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366 | $distance = $checkDistance; |
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367 | } |
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368 | } |
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369 | |||
370 | return $distance; |
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371 | } |
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372 | |||
373 | /** |
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374 | * @param Geometry $geometry |
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375 | * @return float|null |
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376 | */ |
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377 | private function distanceToMultiGeometry(Geometry $geometry) |
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378 | { |
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379 | // The nearest point might be a vertex, but it could also be somewhere along a line-segment |
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380 | // that makes up the geometry (between vertices). |
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381 | // Here we brute force check all line segments that make up these geometries. |
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382 | $distance = null; |
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383 | /** @var Point[] $seg */ |
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384 | foreach ($geometry->explode(true) as $seg) { |
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385 | // As per http://stackoverflow.com/questions/849211/shortest-distance-between-a-point-and-a-line-segment |
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386 | // and http://paulbourke.net/geometry/pointline/ |
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387 | $x1 = $seg[0]->getX(); |
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388 | $y1 = $seg[0]->getY(); |
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389 | $x2 = $seg[1]->getX(); |
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390 | $y2 = $seg[1]->getY(); |
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391 | $px = $x2 - $x1; |
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392 | $py = $y2 - $y1; |
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393 | $d = ($px * $px) + ($py * $py); |
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394 | if ($d == 0) { |
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395 | // Line-segment's endpoints are identical. This is merely a point masquerading a line-segment. |
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396 | $checkDistance = $this->distance($seg[1]); |
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397 | } else { |
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398 | $x3 = $this->getX(); |
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399 | $y3 = $this->getY(); |
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400 | $u = ((($x3 - $x1) * $px) + (($y3 - $y1) * $py)) / $d; |
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401 | if ($u > 1) { |
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402 | $u = 1; |
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403 | } |
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404 | if ($u < 0) { |
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405 | $u = 0; |
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406 | } |
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407 | $x = $x1 + ($u * $px); |
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408 | $y = $y1 + ($u * $py); |
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409 | $dx = $x - $x3; |
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410 | $dy = $y - $y3; |
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411 | $checkDistance = sqrt(($dx * $dx) + ($dy * $dy)); |
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412 | } |
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413 | |||
414 | if ($checkDistance === 0.0) { |
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415 | return 0.0; |
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416 | } |
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417 | if ($checkDistance === null) { |
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418 | continue; |
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419 | } |
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420 | $distance = ($distance ?? $checkDistance); |
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421 | |||
422 | if ($checkDistance < $distance) { |
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423 | $distance = $checkDistance; |
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424 | } |
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425 | } |
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426 | |||
427 | return $distance; |
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428 | } |
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429 | |||
430 | /** |
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431 | * @return float|int|null |
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432 | */ |
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433 | public function minimumZ() |
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434 | { |
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435 | return $this->z; |
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436 | } |
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437 | |||
438 | /** |
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439 | * @return float|int|null |
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440 | */ |
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441 | public function maximumZ() |
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442 | { |
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443 | return $this->z; |
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444 | } |
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445 | |||
446 | /** |
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447 | * @return float|int|null |
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448 | */ |
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449 | public function minimumM() |
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450 | { |
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451 | return $this->m; |
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452 | } |
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453 | |||
454 | /** |
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455 | * @return float|int|null |
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456 | */ |
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457 | public function maximumM() |
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458 | { |
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459 | return $this->m; |
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460 | } |
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461 | |||
462 | /** |
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463 | * @return float 0.0 |
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464 | */ |
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465 | public function getArea(): float |
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466 | { |
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467 | return 0.0; |
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468 | } |
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469 | |||
470 | /** |
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471 | * @return float 0.0 |
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472 | */ |
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473 | public function getLength(): float |
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474 | { |
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475 | return 0.0; |
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476 | } |
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477 | |||
478 | /** |
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479 | * @return float 0.0 |
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480 | */ |
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481 | public function length3D(): float |
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484 | } |
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485 | |||
486 | /** |
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487 | * @param float|int $radius |
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488 | * @return float 0.0 |
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489 | */ |
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490 | public function greatCircleLength($radius = geoPHP::EARTH_WGS84_SEMI_MAJOR_AXIS): float |
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491 | { |
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492 | return 0.0; |
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493 | } |
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494 | |||
495 | /** |
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496 | * @return float 0.0 |
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497 | */ |
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498 | public function haversineLength(): float |
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499 | { |
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500 | return 0.0; |
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501 | } |
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502 | |||
503 | /** |
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504 | * @return int 1 |
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505 | */ |
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506 | public function numGeometries(): int |
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507 | { |
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508 | return $this->isEmpty() ? 0 : 1; |
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509 | } |
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510 | |||
511 | /** |
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512 | * @param int $n |
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513 | * @return Point|null |
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514 | */ |
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515 | public function geometryN(int $n) |
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516 | { |
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517 | return $n === 1 ? $this : null; |
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518 | } |
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519 | |||
520 | /** |
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521 | * @return bool true |
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522 | */ |
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523 | public function isClosed(): bool |
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524 | { |
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525 | return true; |
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526 | } |
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527 | |||
528 | /** |
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529 | * Not valid for this geometry type |
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530 | * |
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531 | * @param bool $toArray default false |
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532 | * @return array{} |
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533 | */ |
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534 | public function explode(bool $toArray = false): array |
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535 | { |
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536 | return []; |
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537 | } |
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538 | |||
539 | /** |
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540 | * @param int|float $dx |
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541 | * @param int|float $dy |
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542 | * @param int|float $dz |
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543 | * @return void |
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544 | */ |
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545 | public function translate($dx = 0, $dy = 0, $dz = 0) |
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550 | } |
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551 | } |
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552 |
In the issue above, the returned value is violating the contract defined by the mentioned interface.
Let's take a look at an example: