71 lines
1.6 KiB
C#
71 lines
1.6 KiB
C#
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using Sandbox;
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using System;
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namespace VeloX;
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public partial class VeloXCar
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{
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public const float MIN_DRIFT_ANGLE = 10f;
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public const float MIN_DRIFT_SPEED = 10f;
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public const float MAX_DRIFT_ANGLE = 110f;
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public static readonly SoundFile SkidSound = SoundFile.Load( "sounds/tire/skid.wav" );
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private SoundHandle _skidHandle;
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private float targetPitch;
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private float targetVolume;
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public float GetDriftAngle()
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{
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if ( !IsOnGround )
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return 0;
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var velocity = Body.Velocity;
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var forward = WorldRotation.Forward;
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// Early exit if speed is too low
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if ( TotalSpeed < MIN_DRIFT_SPEED )
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return 0f;
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// Normalize the dot product calculation
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float dotProduct = velocity.Normal.Dot( forward );
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// Handle potential floating point precision issues
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float cosAngle = dotProduct;
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cosAngle = MathX.Clamp( cosAngle, -1f, 1f );
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// Calculate angle in degrees
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float angle = MathF.Abs( MathX.RadianToDegree( MathF.Acos( cosAngle ) ) );
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// Check if angle is within drift range
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if ( angle >= MIN_DRIFT_ANGLE && angle <= MAX_DRIFT_ANGLE )
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return angle;
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return 0f;
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}
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protected virtual void UpdateDrift( float dt )
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{
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float driftAngle = GetDriftAngle();
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float mul = (driftAngle - MIN_DRIFT_ANGLE) / (90 - MIN_DRIFT_ANGLE);
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if ( !_skidHandle.IsValid() )
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_skidHandle = Sound.PlayFile( SkidSound );
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if ( !_skidHandle.IsValid() )
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return;
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targetVolume = mul;
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targetPitch = 0.75f + 0.25f * mul;
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_skidHandle.Pitch += (targetPitch - _skidHandle.Pitch) * dt * 5f;
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_skidHandle.Volume += (targetVolume - _skidHandle.Volume) * dt * 10f;
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_skidHandle.Position = WorldPosition;
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}
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}
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