55 lines
2.1 KiB
C#
55 lines
2.1 KiB
C#
|
using UnityEngine;
|
|||
|
|
using System.Collections;
|
|||
|
|
using RootMotion.FinalIK;
|
|||
|
|
|
|||
|
|
namespace RootMotion.Demos {
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Raycasting to the ground to redirect upper-body animation based on ground topography.
|
|||
|
|
/// </summary>
|
|||
|
|
public class TerrainOffset : MonoBehaviour {
|
|||
|
|
|
|||
|
|
public AimIK aimIK; // Reference to the AimIK component
|
|||
|
|
public Vector3 raycastOffset = new Vector3(0f, 2f, 1.5f); // Offset from the character, in local space, to raycast from
|
|||
|
|
public LayerMask raycastLayers; // The layers we want to raycast at
|
|||
|
|
public float min = -2f, max = 2f; // Min and max for the offset
|
|||
|
|
public float lerpSpeed = 10f; // The speed of lerping the IKPosition to make things nice and smooth
|
|||
|
|
|
|||
|
|
private RaycastHit hit;
|
|||
|
|
private Vector3 offset;
|
|||
|
|
|
|||
|
|
void LateUpdate() {
|
|||
|
|
// Find the raycastOffset in world space
|
|||
|
|
Vector3 worldOffset = transform.rotation * raycastOffset;
|
|||
|
|
|
|||
|
|
// Find how much higher is the ground at worldOffset relative to the character position.
|
|||
|
|
Vector3 realOffset = GetGroundHeightOffset(transform.position + worldOffset);
|
|||
|
|
|
|||
|
|
// Smoothly lerp the offset value so it would not jump on sudden raycast changes
|
|||
|
|
offset = Vector3.Lerp(offset, realOffset, Time.deltaTime * lerpSpeed);
|
|||
|
|
|
|||
|
|
// The default offset point at the character's height
|
|||
|
|
Vector3 zeroOffsetPosition = transform.position + new Vector3(worldOffset.x, 0f, worldOffset.z);
|
|||
|
|
|
|||
|
|
// Make the Aim Transform look at the default offset point (So when we are on planar ground there will be nothing for Aim IK to do)
|
|||
|
|
aimIK.solver.transform.LookAt(zeroOffsetPosition);
|
|||
|
|
|
|||
|
|
// Make Aim IK bend the spine by the offset.
|
|||
|
|
aimIK.solver.IKPosition = zeroOffsetPosition + offset;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private Vector3 GetGroundHeightOffset(Vector3 worldPosition) {
|
|||
|
|
// Visualize the raycast
|
|||
|
|
Debug.DrawRay(worldPosition, Vector3.down * raycastOffset.y * 2f, Color.green);
|
|||
|
|
|
|||
|
|
// Raycast to find how much higher is the ground at worldPosition relative to the character.
|
|||
|
|
if (Physics.Raycast(worldPosition, Vector3.down, out hit, raycastOffset.y * 2f)) {
|
|||
|
|
return Mathf.Clamp(hit.point.y - transform.position.y, min, max) * Vector3.up;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Raycast found nothing so return zero
|
|||
|
|
return Vector3.zero;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|