95 lines
1.2 KiB
Go
95 lines
1.2 KiB
Go
package gg
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import (
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"math"
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)
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// The type is used in all Engine interactions
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// where you need floating values.
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type Float = float64
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const (
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MaxFloat = math.MaxFloat64
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Pi = math.Pi
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RadDegrees = 57.2958
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//PiRad = Pi * Rad
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EqualityThreshold = 1e-9
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)
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func IsNan(v Float) bool {
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return math.IsNaN(v)
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}
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func IsInf(f Float, sign int) bool {
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return math.IsInf(f, sign)
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}
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func Degree(f Float) Float {
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return (f/(2*Pi))*360
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}
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// Returns square of the value.
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func Sqr(v Float) Float {
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return v * v
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}
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func Sqrt(v Float) Float {
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return math.Sqrt(v)
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}
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func Asin(v Float) Float {
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return math.Asin(v)
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}
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func Atan(v Float) Float {
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return math.Atan(v)
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}
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func Sgn(v Float) Float {
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if v > 0 {
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return 1
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}
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if v < 0 {
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return -1
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}
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return 0
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}
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func Max(v1, v2 Float) Float {
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if v1 > v2 {
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return v1
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}
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return v2
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}
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func Min(v1, v2 Float) Float {
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if v1 < v2 {
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return v1
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}
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return v2
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}
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func Abs(v Float) Float {
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if v >= 0 {
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return v
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}
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return -v
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}
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func RadiansToDegrees(v Float) Float {
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return v/Pi * 180
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}
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func DeegresToRadians(v Float) Float {
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return v
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}
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// Returns whether the two floats are nearly equal.
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func Neq(a, b Float) bool {
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return Abs(a-b) <= EqualityThreshold
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}
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