using UnityEngine;
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[ExecuteAlways]
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public class ImageMask : PostEffectsBaseEx
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{
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static readonly string shaderName = "lcl/screenEffect/MaskEffect";
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// 遮罩大小
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[Range(0.01f, 10f), Tooltip("遮罩大小")]
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public float size = 5.0f;
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// 边缘模糊程度
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[Range(0.0001f, 0.1f), Tooltip("边缘模糊程度")]
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public float edgeBlurLength = 0.05f;
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// 遮罩中心位置
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private Vector2 pos = new Vector4(0.5f, 0.5f);
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void OnEnable()
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{
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shader = Shader.Find(shaderName);
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}
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// 渲染屏幕
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void OnRenderImage(RenderTexture source, RenderTexture destination)
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{
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if (material)
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{
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// 把鼠标坐标传递给shader
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material.SetVector("_Pos", pos);
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// 遮罩大小
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material.SetFloat("_Size", size);
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// 模糊程度
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material.SetFloat("_EdgeBlurLength", edgeBlurLength);
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// 渲染
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Graphics.Blit(source, destination, material);
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}
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else
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{
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Graphics.Blit(source, destination);
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}
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}
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// void Update()
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// {
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// if (Input.GetMouseButton(0))
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// {
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// Vector2 mousePos = Input.mousePosition;
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// //将mousePos转化为（0，1）区间
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// pos = new Vector2(mousePos.x / Screen.width, mousePos.y / Screen.height);
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// }
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// }
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}
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