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| 44 | |
| 45 | // -------------------------------------------------------------------------------- |
| 46 | float GetAutoClamppedTangent( float prevTime, float prevValue, float time, float value, float nextTime, float nextValue ) |
| 47 | { |
| 48 | if( ( value < prevValue && value < nextValue ) || ( value > prevValue && value > nextValue ) ) |
| 49 | { |
| 50 | return 0; |
| 51 | } |
| 52 | |
| 53 | float valueDiff = std::abs( prevValue - nextValue ); |
| 54 | |
| 55 | if( valueDiff == 0 ) |
| 56 | { |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | float keyDistance = std::abs( value - prevValue ) / valueDiff; |
| 61 | keyDistance = std::min( 1.f, std::min( keyDistance, 1 - keyDistance ) * 6 ); |
| 62 | |
| 63 | float autoTangent = ( nextValue - prevValue ) / ( nextTime - prevTime ); |
| 64 | |
| 65 | return autoTangent * keyDistance; |
| 66 | } |
| 67 | |
| 68 | } |
| 69 |