Unity 程序动画 2D,3D程序蜘蛛脚,人物程序性动画
2024-05-08 04:08:53
强大的程序腿效果
程序脚完全使用算法完成,没有复杂的物理运算
3D蜘蛛脚算法
public class SpiderProceduralAnimation : MonoBehaviour{public Transform[] legTargets;public float stepSize = 0.15f;public int smoothness = 8;public float stepHeight = 0.15f;public float sphereCastRadius = 0.125f;public bool bodyOrientation = true;public float raycastRange = 1.5f;private Vector3[] defaultLegPositions;private Vector3[] lastLegPositions;private Vector3 lastBodyUp;private bool[] legMoving;private int nbLegs;private Vector3 velocity;private Vector3 lastVelocity;private Vector3 lastBodyPos;private float velocityMultiplier = 15f;Vector3[] MatchToSurfaceFromAbove(Vector3 point, float halfRange, Vector3 up){Vector3[] res = new Vector3[2];res[1] = Vector3.zero;RaycastHit hit;Ray ray = new Ray(point + halfRange * up / 2f, -up);if (Physics.SphereCast(ray, sphereCastRadius, out hit, 2f * halfRange)){res[0] = hit.point;res[1] = hit.normal;}else{res[0] = point;}return res;}void Start(){lastBodyUp = transform.up;nbLegs = legTargets.Length;defaultLegPositions = new Vector3[nbLegs];lastLegPositions = new Vector3[nbLegs];legMoving = new bool[nbLegs];for (int i = 0; i < nbLegs; ++i){defaultLegPositions[i] = legTargets[i].localPosition;lastLegPositions[i] = legTargets[i].position;legMoving[i] = false;}lastBodyPos = transform.position;}IEnumerator PerformStep(int index, Vector3 targetPoint){Vector3 startPos = lastLegPositions[index];for (int i = 1; i <= smoothness; ++i){legTargets[index].position = Vector3.Lerp(startPos, targetPoint, i / (float)(smoothness + 1f));legTargets[index].position += transform.up * Mathf.Sin(i / (float)(smoothness + 1f) * Mathf.PI) * stepHeight;yield return new WaitForFixedUpdate();}legTargets[index].position = targetPoint;lastLegPositions[index] = legTargets[index].position;legMoving[0] = false;}void FixedUpdate(){velocity = transform.position - lastBodyPos;velocity = (velocity + smoothness * lastVelocity) / (smoothness + 1f);if (velocity.magnitude < 0.000025f)velocity = lastVelocity;elselastVelocity = velocity;Vector3[] desiredPositions = new Vector3[nbLegs];int indexToMove = -1;float maxDistance = stepSize;for (int i = 0; i < nbLegs; ++i){desiredPositions[i] = transform.TransformPoint(defaultLegPositions[i]);float distance = Vector3.ProjectOnPlane(desiredPositions[i] + velocity * velocityMultiplier - lastLegPositions[i], transform.up).magnitude;if (distance > maxDistance){maxDistance = distance;indexToMove = i;}}for (int i = 0; i < nbLegs; ++i)if (i != indexToMove)legTargets[i].position = lastLegPositions[i];if (indexToMove != -1 && !legMoving[0]){Vector3 targetPoint = desiredPositions[indexToMove] + Mathf.Clamp(velocity.magnitude * velocityMultiplier, 0.0f, 1.5f) * (desiredPositions[indexToMove] - legTargets[indexToMove].position) + velocity * velocityMultiplier;Vector3[] positionAndNormalFwd = MatchToSurfaceFromAbove(targetPoint + velocity * velocityMultiplier, raycastRange, (transform.parent.up - velocity * 100).normalized);Vector3[] positionAndNormalBwd = MatchToSurfaceFromAbove(targetPoint + velocity * velocityMultiplier, raycastRange * (1f + velocity.magnitude), (transform.parent.up + velocity * 75).normalized);legMoving[0] = true;if (positionAndNormalFwd[1] == Vector3.zero){StartCoroutine(PerformStep(indexToMove, positionAndNormalBwd[0]));}else{StartCoroutine(PerformStep(indexToMove, positionAndNormalFwd[0]));}}lastBodyPos = transform.position;if (nbLegs > 3 && bodyOrientation){Vector3 v1 = legTargets[0].position - legTargets[1].position;Vector3 v2 = legTargets[2].position - legTargets[3].position;Vector3 normal = Vector3.Cross(v1, v2).normalized;Vector3 up = Vector3.Lerp(lastBodyUp, normal, 1f / (float)(smoothness + 1));transform.up = up;transform.rotation = Quaternion.LookRotation(transform.parent.forward, up);lastBodyUp = transform.up;}}private void OnDrawGizmosSelected(){for (int i = 0; i < nbLegs; ++i){Gizmos.color = Color.red;Gizmos.DrawWireSphere(legTargets[i].position, 0.05f);Gizmos.color = Color.green;Gizmos.DrawWireSphere(transform.TransformPoint(defaultLegPositions[i]), stepSize);}}}
2D蜘蛛脚算法
public class SpiderProceduralAnimation : MonoBehaviour{public Transform[] legTargets;public float stepSize = 0.15f;public int smoothness = 8;public float stepHeight = 0.15f;public bool bodyOrientation = true;public float raycastRange = 1.5f;private Vector2[] defaultLegPositions;private Vector2[] lastLegPositions;private Vector2 lastBodyUp;private bool[] legMoving;private int nbLegs;private Vector2 velocity;private Vector2 lastVelocity;private Vector2 lastBodyPos;private float velocityMultiplier = 7f;Vector2[] MatchToSurfaceFromAbove(Vector2 point, float halfRange, Vector2 up){Vector2[] res = new Vector2[2];res[1] = Vector3.zero;RaycastHit2D hit;hit = Physics2D.Raycast(point + halfRange * up / 2f, -up, 2f * halfRange);Debug.DrawRay(point + halfRange * up / 2f, -up * 2f * halfRange, Color.red, smoothness * Time.deltaTime);if (hit.collider){res[0] = hit.point;res[1] = hit.normal;}else{res[0] = point;}return res;}void Start(){lastBodyUp = transform.up;nbLegs = legTargets.Length;defaultLegPositions = new Vector2[nbLegs];lastLegPositions = new Vector2[nbLegs];legMoving = new bool[nbLegs];for (int i = 0; i < nbLegs; ++i){defaultLegPositions[i] = legTargets[i].localPosition;lastLegPositions[i] = legTargets[i].position;legMoving[i] = false;}lastBodyPos = transform.position;}IEnumerator PerformStep(int index, Vector3 targetPoint){Vector3 startPos = lastLegPositions[index];for (int i = 1; i <= smoothness; ++i){legTargets[index].position = Vector3.Lerp(startPos, targetPoint, i / (float)(smoothness + 1f));legTargets[index].position += transform.up * Mathf.Sin(i / (float)(smoothness + 1f) * Mathf.PI) * stepHeight;yield return new WaitForFixedUpdate();}legTargets[index].position = targetPoint;lastLegPositions[index] = legTargets[index].position;legMoving[0] = false;}void FixedUpdate(){velocity = (Vector2)transform.position - lastBodyPos;velocity = (velocity + smoothness * lastVelocity) / (smoothness + 1f);if (velocity.magnitude < 0.000025f)velocity = lastVelocity;elselastVelocity = velocity;Vector2[] desiredPositions = new Vector2[nbLegs];int indexToMove = -1;float maxDistance = stepSize;for (int i = 0; i < nbLegs; ++i){desiredPositions[i] = transform.TransformPoint(defaultLegPositions[i]);float distance = Vector3.ProjectOnPlane(desiredPositions[i] + velocity * velocityMultiplier - lastLegPositions[i], transform.up).magnitude;if (distance > maxDistance){maxDistance = distance;indexToMove = i;}}for (int i = 0; i < nbLegs; ++i)if (i != indexToMove)legTargets[i].position = lastLegPositions[i];if (indexToMove != -1 && !legMoving[0]){Vector2 targetPoint = desiredPositions[indexToMove] + Mathf.Clamp(velocity.magnitude * velocityMultiplier, 0.0f, 1.5f) * (desiredPositions[indexToMove] -(Vector2)legTargets[indexToMove].position) + velocity * velocityMultiplier;Vector2[] positionAndNormalFwd = MatchToSurfaceFromAbove(targetPoint + velocity * velocityMultiplier, raycastRange,((Vector2)transform.parent.up - velocity * 10).normalized);Vector2[] positionAndNormalBwd = MatchToSurfaceFromAbove(targetPoint + velocity * velocityMultiplier, raycastRange * (1f + velocity.magnitude),((Vector2)transform.parent.up + velocity * 10).normalized);legMoving[0] = true;if (positionAndNormalFwd[1] == Vector2.zero){StartCoroutine(PerformStep(indexToMove, positionAndNormalBwd[0]));}else{StartCoroutine(PerformStep(indexToMove, positionAndNormalFwd[0]));}}lastBodyPos = transform.position;if (nbLegs > 1 && bodyOrientation){Vector2 v1 = (legTargets[1].position - legTargets[0].position).normalized;Vector3 v2 = Vector3.back;Vector3 normal = Vector3.Cross(v1, v2).normalized;Vector3 up = Vector3.Lerp(lastBodyUp, normal, 1f / (float)(smoothness + 1));transform.up = up;transform.rotation = Quaternion.LookRotation(transform.parent.forward, up);lastBodyUp = transform.up;}}private void OnDrawGizmosSelected(){for (int i = 0; i < nbLegs; ++i){Gizmos.color = Color.red;Gizmos.DrawWireSphere(legTargets[i].position, 0.05f);Gizmos.color = Color.green;Gizmos.DrawWireSphere(transform.TransformPoint(defaultLegPositions[i]), stepSize);}}}
人物程序动画算法
public class ProceduralAnimation : MonoBehaviour
{/* Some useful functions we may need */static Vector3[] CastOnSurface(Vector3 point, float halfRange, Vector3 up){Vector3[] res = new Vector3[2];RaycastHit hit;Ray ray = new Ray(new Vector3(point.x, point.y + halfRange, point.z), -up);if (Physics.Raycast(ray, out hit, 2f * halfRange)){res[0] = hit.point;res[1] = hit.normal;}else{res[0] = point;}return res;}/*************************************/public Transform leftFootTarget;public Transform rightFootTarget;public Transform leftFootTargetRig;public Transform rightFootTargetRig;public Transform pivot;public Transform scaler;public float smoothness = 2f;public float stepHeight = 0.2f;public float stepLength = 1f;public float angularSpeed = 0.1f;public float velocityMultiplier = 80f;public float bounceAmplitude = 0.05f;public bool running = false;private Vector3 initLeftFootPos;private Vector3 initRightFootPos;private Vector3 lastLeftFootPos;private Vector3 lastRightFootPos;private Vector3 lastBodyPos;private Vector3 initBodyPos;private Vector3 velocity;private Vector3 lastVelocity;// Start is called before the first frame updatevoid Start(){initLeftFootPos = leftFootTarget.localPosition;initRightFootPos = rightFootTarget.localPosition;lastLeftFootPos = leftFootTarget.position;lastRightFootPos = rightFootTarget.position;lastBodyPos = transform.position;initBodyPos = transform.localPosition;}// Update is called once per framevoid FixedUpdate(){velocity = transform.position - lastBodyPos;velocity *= velocityMultiplier;velocity = (velocity + smoothness * lastVelocity) / (smoothness + 1f);if (velocity.magnitude < 0.000025f * velocityMultiplier)velocity = lastVelocity;lastVelocity = velocity;int sign = (Vector3.Dot(velocity.normalized, transform.forward) < 0 ? -1 : 1);scaler.localScale = new Vector3(scaler.localScale.x, stepHeight * 2f * velocity.magnitude, stepLength * velocity.magnitude);scaler.rotation = Quaternion.LookRotation(sign * velocity.normalized, Vector3.up);pivot.Rotate(Vector3.right, sign * angularSpeed, Space.Self);Vector3 desiredPositionLeft = leftFootTarget.position;Vector3 desiredPositionRight = rightFootTarget.position;Vector3[] posNormLeft = CastOnSurface(desiredPositionLeft, 2f, Vector3.up);if (posNormLeft[0].y > desiredPositionLeft.y){leftFootTargetRig.position = posNormLeft[0];}else{leftFootTargetRig.position = desiredPositionLeft;}if (posNormLeft[1] != Vector3.zero){leftFootTargetRig.rotation = Quaternion.LookRotation(sign * velocity.normalized, posNormLeft[1]);}Vector3[] posNormRight = CastOnSurface(desiredPositionRight, 2f, Vector3.up);if (posNormRight[0].y > desiredPositionRight.y){rightFootTargetRig.position = posNormRight[0];}else{rightFootTargetRig.position = desiredPositionRight;}if(posNormRight[1] != Vector3.zero){rightFootTargetRig.rotation = Quaternion.LookRotation(sign * velocity.normalized, posNormRight[1]);}lastLeftFootPos = leftFootTargetRig.position;lastRightFootPos = rightFootTargetRig.position;float feetDistance = Mathf.Clamp01(Mathf.Abs(leftFootTargetRig.localPosition.z - rightFootTargetRig.localPosition.z) / (stepLength / 4f));float heightReduction = (running ? Mathf.Clamp01(velocity.magnitude) * bounceAmplitude - bounceAmplitude * Mathf.Clamp(velocity.magnitude, 0f, 10f) * feetDistance : bounceAmplitude * Mathf.Clamp(velocity.magnitude, 0f, 10f) * feetDistance);transform.localPosition = initBodyPos - heightReduction * Vector3.up;scaler.localPosition = new Vector3(0f, heightReduction, 0f);lastBodyPos = transform.position;}private void OnDrawGizmosSelected(){Gizmos.DrawWireSphere(leftFootTarget.position, 0.2f);Gizmos.DrawWireSphere(rightFootTarget.position, 0.2f);}
}
哇塞这么多代码,头晕,搞不明白,看不太懂
没事的! demo来啦~
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