【cocos shader 006】 连续 滚动 特效无限地图背景

先上效果：

local Rolling = {

frag = [[
    #ifdef GL_ES
    precision highp float;
    #endif

    varying vec4 v_fragmentColor;
    varying vec2 v_texCoord;

	uniform float speedX = 0.f;
	uniform float speedY = 0.f;
   
    void main()
    {
		vec2 pos = v_texCoord;
		if (speedX != 0.f)
		{
			pos.x += CC_Time.x * speedX;
		}
		if (speedY != 0.f)
		{
			pos.y += CC_Time.x * speedY;
		}
		if (pos.x > 1.0f)
		{
			pos.x -= floor(pos.x);
		}
		if (pos.y > 1.0f)
		{
			pos.y -= floor(pos.y);
		}
		vec4 uv = texture2D(CC_Texture0, pos);
        gl_FragColor = uv;
    }
]],

vert = [[
            attribute vec4 a_position;
            attribute vec2 a_texCoord;
            attribute vec4 a_color;

            #ifdef GL_ES
            varying lowp vec4 v_fragmentColor;
            varying mediump vec2 v_texCoord;
   
  
 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
  
21
  
22
  
23
  
24
  
25
  
26
  
27
  
28
  
29
  
30
  
31
  
32
  
33
  
34
  
35
  
36
  
37
  
38
  
39
  
40
  
41
  
42
  
43
  
44
  
45
 

文章来源: blog.csdn.net，作者：呦呦鹿鸣.，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/zhang1461376499/article/details/107615354