74 lines
2.8 KiB
C#
74 lines
2.8 KiB
C#
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using UnityEngine;
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namespace Pathfinding.Examples {
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/// <summary>
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/// Animation helper specifically made for the spider robot in the example scenes.
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/// The spider robot (or mine-bot) which has been copied from the Unity Example Project
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/// can have this script attached to be able to pathfind around with animations working properly.\n
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/// This script should be attached to a parent GameObject however since the original bot has Z+ as up.
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/// This component requires Z+ to be forward and Y+ to be up.\n
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///
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/// A movement script (e.g AIPath) must also be attached to the same GameObject to actually move the unit.
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///
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/// Animation is handled by this component. The Animator component refered to in <see cref="anim"/> should have a single parameter called NormalizedSpeed.
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/// When the end of path is reached, if the <see cref="endOfPathEffect"/> is not null, it will be instantiated at the current position. However a check will be
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/// done so that it won't spawn effects too close to the previous spawn-point.
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/// [Open online documentation to see images]
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/// </summary>
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[HelpURL("http://arongranberg.com/astar/docs/class_pathfinding_1_1_examples_1_1_mine_bot_animation.php")]
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public class MineBotAnimation : VersionedMonoBehaviour {
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/// <summary>
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/// Animation component.
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/// Should hold animations "awake" and "forward"
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/// </summary>
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public Animator anim;
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/// <summary>
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/// Effect which will be instantiated when end of path is reached.
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/// See: <see cref="OnTargetReached"/>
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/// </summary>
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public GameObject endOfPathEffect;
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bool isAtDestination;
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IAstarAI ai;
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Transform tr;
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protected override void Awake () {
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base.Awake();
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ai = GetComponent<IAstarAI>();
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tr = GetComponent<Transform>();
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}
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/// <summary>Point for the last spawn of <see cref="endOfPathEffect"/></summary>
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protected Vector3 lastTarget;
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/// <summary>
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/// Called when the end of path has been reached.
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/// An effect (<see cref="endOfPathEffect)"/> is spawned when this function is called
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/// However, since paths are recalculated quite often, we only spawn the effect
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/// when the current position is some distance away from the previous spawn-point
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/// </summary>
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void OnTargetReached () {
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if (endOfPathEffect != null && Vector3.Distance(tr.position, lastTarget) > 1) {
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GameObject.Instantiate(endOfPathEffect, tr.position, tr.rotation);
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lastTarget = tr.position;
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}
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}
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protected void Update () {
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if (ai.reachedEndOfPath) {
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if (!isAtDestination) OnTargetReached();
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isAtDestination = true;
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} else isAtDestination = false;
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// Calculate the velocity relative to this transform's orientation
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Vector3 relVelocity = tr.InverseTransformDirection(ai.velocity);
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relVelocity.y = 0;
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// Speed relative to the character size
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anim.SetFloat("NormalizedSpeed", relVelocity.magnitude / anim.transform.lossyScale.x);
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}
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}
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}
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