126 lines
2.6 KiB
Go
126 lines
2.6 KiB
Go
// Copyright 2017 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package s2
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import "github.com/golang/geo/s1"
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// roundAngle returns the value rounded to nearest as an int32.
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// This does not match C++ exactly for the case of x.5.
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func roundAngle(val s1.Angle) int32 {
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if val < 0 {
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return int32(val - 0.5)
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}
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return int32(val + 0.5)
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}
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// minAngle returns the smallest of the given values.
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func minAngle(x s1.Angle, others ...s1.Angle) s1.Angle {
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min := x
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for _, y := range others {
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if y < min {
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min = y
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}
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}
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return min
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}
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// maxAngle returns the largest of the given values.
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func maxAngle(x s1.Angle, others ...s1.Angle) s1.Angle {
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max := x
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for _, y := range others {
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if y > max {
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max = y
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}
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}
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return max
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}
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// minChordAngle returns the smallest of the given values.
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func minChordAngle(x s1.ChordAngle, others ...s1.ChordAngle) s1.ChordAngle {
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min := x
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for _, y := range others {
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if y < min {
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min = y
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}
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}
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return min
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}
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// maxChordAngle returns the largest of the given values.
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func maxChordAngle(x s1.ChordAngle, others ...s1.ChordAngle) s1.ChordAngle {
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max := x
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for _, y := range others {
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if y > max {
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max = y
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}
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}
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return max
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}
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// minFloat64 returns the smallest of the given values.
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func minFloat64(x float64, others ...float64) float64 {
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min := x
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for _, y := range others {
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if y < min {
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min = y
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}
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}
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return min
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}
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// maxFloat64 returns the largest of the given values.
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func maxFloat64(x float64, others ...float64) float64 {
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max := x
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for _, y := range others {
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if y > max {
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max = y
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}
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}
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return max
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}
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// minInt returns the smallest of the given values.
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func minInt(x int, others ...int) int {
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min := x
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for _, y := range others {
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if y < min {
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min = y
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}
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}
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return min
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}
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// maxInt returns the largest of the given values.
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func maxInt(x int, others ...int) int {
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max := x
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for _, y := range others {
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if y > max {
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max = y
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}
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}
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return max
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}
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// clampInt returns the number closest to x within the range min..max.
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func clampInt(x, min, max int) int {
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if x < min {
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return min
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}
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if x > max {
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return max
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}
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return x
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}
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