public void ProcessAnimation(AnimationStream stream) { float w = jobWeight.Get(stream); if (w > 0f) { //We only need to process if the weight is greater than 0 float minOffset = offsetFromGround.Get(stream); Vector3 normal = groundNormal.Get(stream); float angle = Vector3.Angle(Vector3.up, normal); float offset = minOffset / math.sin(math.radians(90 - angle)); Vector3 targetPosition = groundPoint.Get(stream) + Vector3.up * offset; Vector3 sourcePosition = source.GetPosition(stream); if (targetPosition.y > sourcePosition.y) { constrained.SetPosition(stream, math.lerp(sourcePosition, targetPosition, w)); Quaternion rotation = quaternion.LookRotation(source.GetRotation(stream) * Vector3.forward, normal); constrained.SetRotation(stream, rotation); } else { constrained.SetPosition(stream, sourcePosition); constrained.SetRotation(stream, source.GetRotation(stream)); } } }
public void ProcessAnimation(AnimationStream stream) { float w = jobWeight.Get(stream); if (w > 0f) { if (blendPosition.Get(stream)) { Vector3 posBlend = Vector3.Lerp( sourceA.GetPosition(stream) + sourceAOffset.translation, sourceB.GetPosition(stream) + sourceBOffset.translation, positionWeight.Get(stream) ); driven.SetPosition(stream, Vector3.Lerp(driven.GetPosition(stream), posBlend, w)); } else { driven.SetLocalPosition(stream, driven.GetLocalPosition(stream)); } if (blendRotation.Get(stream)) { Quaternion rotBlend = Quaternion.Lerp( sourceA.GetRotation(stream) * sourceAOffset.rotation, sourceB.GetRotation(stream) * sourceBOffset.rotation, rotationWeight.Get(stream) ); driven.SetRotation(stream, Quaternion.Lerp(driven.GetRotation(stream), rotBlend, w)); } else { driven.SetLocalRotation(stream, driven.GetLocalRotation(stream)); } } else { AnimationRuntimeUtils.PassThrough(stream, driven); } }
public static void SolveTwoBoneIK( AnimationStream stream, ReadWriteTransformHandle root, ReadWriteTransformHandle mid, ReadWriteTransformHandle tip, ReadOnlyTransformHandle target, ReadOnlyTransformHandle hint, float posWeight, float rotWeight, float hintWeight, AffineTransform targetOffset ) { Vector3 aPosition = root.GetPosition(stream); Vector3 bPosition = mid.GetPosition(stream); Vector3 cPosition = tip.GetPosition(stream); target.GetGlobalTR(stream, out Vector3 targetPos, out Quaternion targetRot); Vector3 tPosition = Vector3.Lerp(cPosition, targetPos + targetOffset.translation, posWeight); Quaternion tRotation = Quaternion.Lerp(tip.GetRotation(stream), targetRot * targetOffset.rotation, rotWeight); bool hasHint = hint.IsValid(stream) && hintWeight > 0f; Vector3 ab = bPosition - aPosition; Vector3 bc = cPosition - bPosition; Vector3 ac = cPosition - aPosition; Vector3 at = tPosition - aPosition; float abLen = ab.magnitude; float bcLen = bc.magnitude; float acLen = ac.magnitude; float atLen = at.magnitude; float oldAbcAngle = TriangleAngle(acLen, abLen, bcLen); float newAbcAngle = TriangleAngle(atLen, abLen, bcLen); // Bend normal strategy is to take whatever has been provided in the animation // stream to minimize configuration changes, however if this is collinear // try computing a bend normal given the desired target position. // If this also fails, try resolving axis using hint if provided. Vector3 axis = Vector3.Cross(ab, bc); if (axis.sqrMagnitude < k_SqrEpsilon) { axis = hasHint ? Vector3.Cross(hint.GetPosition(stream) - aPosition, bc) : Vector3.zero; if (axis.sqrMagnitude < k_SqrEpsilon) { axis = Vector3.Cross(at, bc); } if (axis.sqrMagnitude < k_SqrEpsilon) { axis = Vector3.up; } } axis = Vector3.Normalize(axis); float a = 0.5f * (oldAbcAngle - newAbcAngle); float sin = Mathf.Sin(a); float cos = Mathf.Cos(a); Quaternion deltaR = new Quaternion(axis.x * sin, axis.y * sin, axis.z * sin, cos); mid.SetRotation(stream, deltaR * mid.GetRotation(stream)); cPosition = tip.GetPosition(stream); ac = cPosition - aPosition; root.SetRotation(stream, QuaternionExt.FromToRotation(ac, at) * root.GetRotation(stream)); if (hasHint) { float acSqrMag = ac.sqrMagnitude; if (acSqrMag > 0f) { bPosition = mid.GetPosition(stream); cPosition = tip.GetPosition(stream); ab = bPosition - aPosition; ac = cPosition - aPosition; Vector3 acNorm = ac / Mathf.Sqrt(acSqrMag); Vector3 ah = hint.GetPosition(stream) - aPosition; Vector3 abProj = ab - acNorm * Vector3.Dot(ab, acNorm); Vector3 ahProj = ah - acNorm * Vector3.Dot(ah, acNorm); float maxReach = abLen + bcLen; if (abProj.sqrMagnitude > (maxReach * maxReach * 0.001f) && ahProj.sqrMagnitude > 0f) { Quaternion hintR = QuaternionExt.FromToRotation(abProj, ahProj); hintR.x *= hintWeight; hintR.y *= hintWeight; hintR.z *= hintWeight; root.SetRotation(stream, hintR * root.GetRotation(stream)); } } } tip.SetRotation(stream, tRotation); }