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Fix drag acceleration calculation

more-targets
Titan Yuan 2024-09-12 22:31:14 -07:00
parent d0ef6c3fc4
commit 23de73662c
1 changed files with 9 additions and 10 deletions
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19
Assets/Scripts/Missile.cs
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@ -68,12 +68,12 @@ public class Missile : Agent
accelerationInput -= gravityProjection;
}
Vector3 airDrag = CalculateDrag();
Vector3 liftInducedDrag = CalculateLiftInducedDrag(accelerationInput);
Vector3 dragAcceleration = -(airDrag + liftInducedDrag);
float airDrag = CalculateDrag();
float liftInducedDrag = CalculateLiftInducedDrag(accelerationInput);
float dragAcceleration = -(airDrag + liftInducedDrag);
// Project the drag acceleration onto the forward direction
Vector3 dragAccelerationAlongRoll = Vector3.Dot(dragAcceleration, transform.forward) * transform.forward;
Vector3 dragAccelerationAlongRoll = dragAcceleration * transform.forward;
return accelerationInput + gravity + dragAccelerationAlongRoll;
}
@ -131,22 +131,21 @@ public class Missile : Agent
gravityProjectionYawCoefficient * yawAxis;
}
private Vector3 CalculateDrag()
private float CalculateDrag()
{
float dragCoefficient = StaticConfig.liftDragConfig.dragCoefficient;
float crossSectionalArea = StaticConfig.bodyConfig.crossSectionalArea;
float mass = StaticConfig.bodyConfig.mass;
float dynamicPressure = (float)GetDynamicPressure();
float dragForce = dragCoefficient * dynamicPressure * crossSectionalArea;
return dragForce / mass * Vector3.one;
return dragForce / mass;
}
private Vector3 CalculateLiftInducedDrag(Vector3 accelerationInput)
private float CalculateLiftInducedDrag(Vector3 accelerationInput)
{
Vector3 principalAxes = transform.forward;
float liftAcceleration = Vector3.Dot(accelerationInput, principalAxes);
float liftAcceleration = Vector3.Dot(accelerationInput, transform.forward);
float liftDragRatio = StaticConfig.liftDragConfig.liftDragRatio;
return Mathf.Abs(liftAcceleration / liftDragRatio) * Vector3.one;
return Mathf.Abs(liftAcceleration / liftDragRatio);
}