using UnityEngine;
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using UnityStandardAssets.ImageEffects;
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public class WaterWaveOnUI : PostEffectBase
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{
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//距离系数
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public float distanceFactor = 60.0f;
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//时间系数
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public float timeFactor = -30.0f;
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//sin函数结果系数
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public float totalFactor = 1.0f;
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//波纹宽度
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public float waveWidth = 0.3f;
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//波纹扩散的速度
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public float waveSpeed = 0.3f;
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private float waveStartTime;
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public void StartWave()
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{
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enabled = true;
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//设置startTime
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waveStartTime = Time.time;
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}
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void OnRenderImage(RenderTexture source, RenderTexture destination)
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{
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if (Time.time - waveStartTime > 1)
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{
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//如果时间超过1s，关闭波纹效果
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enabled = false;
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return;
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}
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//计算波纹移动的距离，根据enable到目前的时间*速度求解
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float curWaveDistance = (Time.time - waveStartTime) * waveSpeed;
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//设置一系列参数
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_Material.SetFloat("_distanceFactor", distanceFactor);
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_Material.SetFloat("_timeFactor", timeFactor);
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_Material.SetFloat("_totalFactor", totalFactor);
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_Material.SetFloat("_waveWidth", waveWidth);
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_Material.SetFloat("_curWaveDis", curWaveDistance);
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Graphics.Blit(source, destination, _Material);
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}
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}
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