mirror of https://github.com/oxen-io/session-ios
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
903 B
C
39 lines
903 B
C
//
|
|
// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
|
|
//
|
|
|
|
NS_ASSUME_NONNULL_BEGIN
|
|
|
|
// TODO: We'll eventually want to promote these into an OWSMath.h header.
|
|
static inline CGFloat CGFloatClamp(CGFloat value, CGFloat minValue, CGFloat maxValue)
|
|
{
|
|
return MAX(minValue, MIN(maxValue, value));
|
|
}
|
|
|
|
static inline CGFloat CGFloatClamp01(CGFloat value)
|
|
{
|
|
return CGFloatClamp(value, 0.f, 1.f);
|
|
}
|
|
|
|
static inline CGFloat CGFloatLerp(CGFloat left, CGFloat right, CGFloat alpha)
|
|
{
|
|
alpha = CGFloatClamp01(alpha);
|
|
|
|
return (left * (1.f - alpha)) + (right * alpha);
|
|
}
|
|
|
|
static inline CGFloat CGFloatInverseLerp(CGFloat value, CGFloat minValue, CGFloat maxValue)
|
|
{
|
|
return (value - minValue) / (maxValue - minValue);
|
|
}
|
|
|
|
// Ceil to an even number
|
|
static inline CGFloat CeilEven(CGFloat value)
|
|
{
|
|
return 2.f * ceil(value * 0.5f);
|
|
}
|
|
|
|
void SetRandFunctionSeed(void);
|
|
|
|
NS_ASSUME_NONNULL_END
|