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public enum RippleType
{
Auto=0,
Click
}
public RippleType rippleType;
public AnimationCurve waveform = new AnimationCurve(
new Keyframe(0.00f, 0.50f, 0, 0),
new Keyframe(0.05f, 1.00f, 0, 0),
new Keyframe(0.15f, 0.10f, 0, 0),
new Keyframe(0.25f, 0.80f, 0, 0),
new Keyframe(0.35f, 0.30f, 0, 0),
new Keyframe(0.45f, 0.60f, 0, 0),
new Keyframe(0.55f, 0.40f, 0, 0),
new Keyframe(0.65f, 0.55f, 0, 0),
new Keyframe(0.75f, 0.46f, 0, 0),
new Keyframe(0.85f, 0.52f, 0, 0),
new Keyframe(0.99f, 0.50f, 0, 0)
);
[]
public float refractionStrength = 0.5f;
public Color reflectionColor = Color.gray;
[]
public float reflectionStrength = 0.7f;
[Range(1.0f, 3.0f)]
public float waveSpeed = 1.25f;
[Range(0.0f, 2.0f)]
public float dropInterval = 0.5f;
[SerializeField, HideInInspector]
Shader shader;
class
{
Vector2 position;
float time;
public ()
{
time = 1000;
}
public void AutoReset(){
position = new Vector2(Random.value, Random.value);
time = 0;
}
public void ClickReset()
{
position = new Vector2(Input.mousePosition.x / Screen.width,Input.mousePosition.y / Screen.height);
time = 0;
}
public void Update()
{
time += Time.deltaTime;
}
public Vector4 MakeShaderParameter(float aspect)
{
return new Vector4(position.x * aspect, position.y, time, 0);
}
}
Droplet[] droplets;
Texture2D gradTexture;
Material material;
float timer;
int dropCount;
int curIndex = 0;
void UpdateShaderParameters()
{
var c = GetComponent<Camera>();
if (rippleType == RippleType.Auto)
{
material.SetVector("_Drop1", droplets[0].MakeShaderParameter(c.aspect));
material.SetVector("_Drop2", droplets[1].MakeShaderParameter(c.aspect));
material.SetVector("_Drop3", droplets[2].MakeShaderParameter(c.aspect));
}
else if(rippleType == RippleType.Click)
{
material.SetVector("_Drop"+curIndex, droplets[curIndex].MakeShaderParameter(c.aspect));
curIndex = (++curIndex) % 3;
}
material.SetColor("_Reflection", reflectionColor);
material.SetVector("_Params1", new Vector4(c.aspect, 1, 1 / waveSpeed, 0));
material.SetVector("_Params2", new Vector4(1, 1 / c.aspect, refractionStrength, reflectionStrength));
}
void Awake()
{
droplets = new Droplet[3];
droplets[0] = new Droplet();
droplets[1] = new Droplet();
droplets[2] = new Droplet();
gradTexture = new Texture2D(2048, 1, TextureFormat.Alpha8, false);
gradTexture.wrapMode = TextureWrapMode.Clamp;
gradTexture.filterMode = FilterMode.Bilinear;
for (var i = 0; i < gradTexture.width; i++)
{
var x = 1.0f / gradTexture.width * i;
var a = waveform.Evaluate(x);
gradTexture.SetPixel(i, 0, new Color(a, a, a, a));
}
gradTexture.Apply();
material = new Material(shader);
material.hideFlags = HideFlags.DontSave;
material.SetTexture("_GradTex", gradTexture);
}
void Update()
{
if (dropInterval > 0)
{
if (rippleType == RippleType.Auto)
{
timer += Time.deltaTime;
while (timer > dropInterval)
{
droplets[dropCount++ % droplets.Length].AutoReset();
timer -= dropInterval;
}
}
else if(rippleType == RippleType.Click)
{
if (Input.GetMouseButtonDown(0))
{
droplets[dropCount++ % droplets.Length].ClickReset();
}
}
}
for(int i=0;i<droplets.Length;i++){
droplets[i].Update();
}
UpdateShaderParameters();
}
void OnRenderImage(RenderTexture source, RenderTexture destination)
{
Graphics.Blit(source, destination, material);
}
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