Unity3d Texture map Mobile effects create lava, waterfall effects

Texture map Mobile effects create lava, waterfall effects
The principle is to change the value of the texture coordinate UV dynamically and make it move

First, prepare a decal.

Build a shader
Variable at a glance:
_maintex Main Texture Map
_maintint Main Colors
_scrollxspeed x-axis movement speed
_scrollyspeed y-Axis movement speed

Properties {_maintex ("Base (RGB)", 2D) = "White" {}_maintint ("Diffuse Tint", Color) = (1, 1, 1, 1) _scrollxspeed ("X SCR Oll speed ", range (0, ten)) = 2_scrollyspeed (" Y Scroll Speed ", range (0, 10)) = 2}

It's mostly done in the surf function.
Fixed xscrollvalue = _scrollxspeed * _time;
Fixed yscrollvalue = _scrollyspeed * _time;
x, y offset increases over time

void Surf (Input in, InOut surfaceoutput o) {fixed2 Scrolleduv = in.uv_maintex;fixed Xscrollvalue = _scrollxspeed * _time; Fixed yscrollvalue = _scrollyspeed * _time;scrolleduv + = Fixed2 (Xscrollvalue, yscrollvalue); Half4 C = tex2d (_maintex, SCR OLLEDUV); O. Albedo = C.rgb * _maintint;o. Alpha = C.A;}

_time is a unity Shaderlab built-in value
Float4 _time:time (t/20, T, T*2, T*3)
is a four-dimensional vector

Scrolleduv + = Fixed2 (Xscrollvalue, Yscrollvalue);
x, y values of uvs accumulate offsets over time


Finally integrate the UV and main colors onto the current texture
Produced the effect of this movement

The shader code is as follows

Shader "Custom/testshader" {Properties {_maintex ("Base (RGB)", 2D) = "White" {}_maintint ("Diffuse Tint", Color) = (1, 1, 1, 1) _scrollxspeed ("X Scroll Speed", range (0, ten)) = 2_scrollyspeed ("Y Scroll Speed", range (0, ten)) = 2}subshader {Tag s {"Rendertype" = "Opaque"}lod 200cgprogram#pragma surface Surf Lambertfixed4 _maintint;fixed _scrollxspeed;fixed _ Scrollyspeed;sampler2d _maintex;struct Input {float2 uv_maintex;}; void Surf (Input in, InOut surfaceoutput o) {fixed2 Scrolleduv = in.uv_maintex;fixed Xscrollvalue = _scrollxspeed * _time; Fixed yscrollvalue = _scrollyspeed * _time;scrolleduv + = Fixed2 (Xscrollvalue, yscrollvalue); Half4 C = tex2d (_maintex, SCR OLLEDUV); O. Albedo = C.rgb * _maintint;o. Alpha = C.A;} ENDCG} FallBack "Diffuse"}

Can look at my article also used this knowledge unity3d old movie-style screen effects

--------by wolf96

Unity3d Texture map Mobile effects create lava, waterfall effects