gtsocial-umbx

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util.go (2652B)

      1 // Copyright 2017 Google Inc. All rights reserved.
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //     http://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 
     15 package s2
     16 
     17 import "github.com/golang/geo/s1"
     18 
     19 // roundAngle returns the value rounded to nearest as an int32.
     20 // This does not match C++ exactly for the case of x.5.
     21 func roundAngle(val s1.Angle) int32 {
     22 	if val < 0 {
     23 		return int32(val - 0.5)
     24 	}
     25 	return int32(val + 0.5)
     26 }
     27 
     28 // minAngle returns the smallest of the given values.
     29 func minAngle(x s1.Angle, others ...s1.Angle) s1.Angle {
     30 	min := x
     31 	for _, y := range others {
     32 		if y < min {
     33 			min = y
     34 		}
     35 	}
     36 	return min
     37 }
     38 
     39 // maxAngle returns the largest of the given values.
     40 func maxAngle(x s1.Angle, others ...s1.Angle) s1.Angle {
     41 	max := x
     42 	for _, y := range others {
     43 		if y > max {
     44 			max = y
     45 		}
     46 	}
     47 	return max
     48 }
     49 
     50 // minChordAngle returns the smallest of the given values.
     51 func minChordAngle(x s1.ChordAngle, others ...s1.ChordAngle) s1.ChordAngle {
     52 	min := x
     53 	for _, y := range others {
     54 		if y < min {
     55 			min = y
     56 		}
     57 	}
     58 	return min
     59 }
     60 
     61 // maxChordAngle returns the largest of the given values.
     62 func maxChordAngle(x s1.ChordAngle, others ...s1.ChordAngle) s1.ChordAngle {
     63 	max := x
     64 	for _, y := range others {
     65 		if y > max {
     66 			max = y
     67 		}
     68 	}
     69 	return max
     70 }
     71 
     72 // minFloat64 returns the smallest of the given values.
     73 func minFloat64(x float64, others ...float64) float64 {
     74 	min := x
     75 	for _, y := range others {
     76 		if y < min {
     77 			min = y
     78 		}
     79 	}
     80 	return min
     81 }
     82 
     83 // maxFloat64 returns the largest of the given values.
     84 func maxFloat64(x float64, others ...float64) float64 {
     85 	max := x
     86 	for _, y := range others {
     87 		if y > max {
     88 			max = y
     89 		}
     90 	}
     91 	return max
     92 }
     93 
     94 // minInt returns the smallest of the given values.
     95 func minInt(x int, others ...int) int {
     96 	min := x
     97 	for _, y := range others {
     98 		if y < min {
     99 			min = y
    100 		}
    101 	}
    102 	return min
    103 }
    104 
    105 // maxInt returns the largest of the given values.
    106 func maxInt(x int, others ...int) int {
    107 	max := x
    108 	for _, y := range others {
    109 		if y > max {
    110 			max = y
    111 		}
    112 	}
    113 	return max
    114 }
    115 
    116 // clampInt returns the number closest to x within the range min..max.
    117 func clampInt(x, min, max int) int {
    118 	if x < min {
    119 		return min
    120 	}
    121 	if x > max {
    122 		return max
    123 	}
    124 	return x
    125 }