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| using UnityEngine;
public class UIEnter : MonoBehaviour {
[Header("位置")]
public Vector2 startPosition;
public Vector2 endPosition;
[Header("不透明度")]
[Range(0, 1)]
public float startOpacity;
[Range(0, 1)]
public float endOpacity;
[Header("持续时间")]
public float duration;
RectTransform m_RectTransform;
CanvasGroup m_CanvasGroup;
float m_XMoveSpeed;
float m_YMoveSpeed;
float m_FadeSpeed;
void Awake() {
m_RectTransform = GetComponent<RectTransform>();
m_CanvasGroup = GetComponent<CanvasGroup>();
}
void OnEnable() {
m_RectTransform.anchoredPosition = startPosition;
if (m_CanvasGroup != null) {
m_CanvasGroup.alpha = startOpacity;
m_FadeSpeed = CalculateSpeed(startOpacity, endOpacity);
} else {
Debug.LogWarning("For the opacity changes to take effect, please add CanvasGroup component");
}
m_XMoveSpeed = CalculateSpeed(startPosition.x, endPosition.x);
m_YMoveSpeed = CalculateSpeed(startPosition.y, endPosition.y);
}
void Update() {
if (m_RectTransform.anchoredPosition != endPosition) {
float desX = m_RectTransform.anchoredPosition.x + m_XMoveSpeed * Time.unscaledDeltaTime;
float desY = m_RectTransform.anchoredPosition.y + m_YMoveSpeed * Time.unscaledDeltaTime;
if (JudgeOutOfRange(startPosition.x, endPosition.x, desX)) {
desX = endPosition.x;
}
if (JudgeOutOfRange(startPosition.y, endPosition.y, desY)) {
desY = endPosition.y;
}
Vector2 desPosition = new Vector2(desX, desY);
m_RectTransform.anchoredPosition = desPosition;
if (m_CanvasGroup == null) return;
float desOpacity = m_CanvasGroup.alpha + m_FadeSpeed * Time.unscaledDeltaTime;
if (JudgeOutOfRange(startOpacity, endOpacity, desOpacity)) {
desOpacity = endOpacity;
}
m_CanvasGroup.alpha = desOpacity;
}
}
float CalculateSpeed(float start, float end) {
float Offset = end - start;
float speed = 0;
if (duration > 0) {
speed = Offset / duration;
}
return speed;
}
bool JudgeOutOfRange(float start, float end, float des) {
return Mathf.Sign(end - start) != Mathf.Sign(end - des);
}
}
|
