shader-application v&f for transparent materials

See the wind to realize the earth is very handsome. He wrote the program is very subtle, the earth and cloud color to do an interpolation, as the color value of this pixel, very good. Worship the great God first!

Http://blog.sina.com.cn/s/blog_471132920101d6xb.html

However, I write today shader also achieve the same effect, our thinking is very conventional: the Earth as an opaque object, first rendered. Clouds are rendered as transparent body. No more nonsense to start!

Earth.shader

Shader "Custom/earth" {Properties {_maintex ("Texture", 2D) = "White" {}}subshader {tags{"Queue" = "Geometry" "Rendertype "=" Opaque "}pass {cgprogram#pragma vertex vert#pragma fragment Frag#include" Unitycg.cginc "sampler2d _maintex;struct v2f {float4  pos:sv_position;float2  uv:texcoord0;}; Float4 _maintex_st;v2f Vert (Appdata_base v) {v2f o;//the position on the viewport O.pos = Mul (UNITY_MATRIX_MVP, V.vertex);//Map texture coordinates O.UV = TRANS Form_tex (V.texcoord, _maintex); return o;} Half4 Frag (v2f i): color{//obtains a map of the Earth's UV x that is transverse in the move float u = i.uv.x + -0.1*_time;float2 x=float2 (U, i.uv.y); Half4 Texcol = Tex (_maintex, x); return texcol;} ENDCG}}}

Cloud.shader

Shader "Custom/cloud" {Properties {_maintex ("Texture", 2D) = "White" {}}subshader {tags{             "Queue" = "Transparent"              "Rendertype" = "Transparent"} Pass {             Blend srcalpha oneminussrcalpha cgprogram#pragma vertex vert#pragma fragment Frag#include "Unitycg.cginc" Sampler2d _maintex;struct v2f {float4  pos:sv_position;float2  uv:texcoord0;}; Float4 _maintex_st;v2f Vert (Appdata_base v) {v2f o;//the position on the viewport O.pos = Mul (UNITY_MATRIX_MVP, V.vertex);//Map texture coordinates O.UV = TRANS Form_tex (V.texcoord, _maintex); return o;} Half4 Frag (v2f i): color{//obtains the Earth map of the UV x that is, the transverse moving float u = i.uv.x + -0.2*_time;float2 x = float2 (U, i.uv.y); Half4 Texcol = t ex2d (_maintex, x); texcol = FLOAT4 (1, 1, 1, 0) * (texcol.x); if (texcol.x + texcol.y + texcol.z > 0.95) {texcol = Half4 (t EXCOL.XYZ, 0.5);} return texcol;} ENDCG}}}

OK, the reason why, texcol this step, is because the map is colorful, like thermal imaging diagram. After a

Texcol = FLOAT4 (1, 1, 1, 0) * (texcol.x);

Converted to black and white, in which whites are the cloud effect.

And then you can judge it.

The idea is no problem, but when I write most of the code, it is always ineffective.

How to be transparent in 0 places where there is no cloud. And then I joined the blend Srcalpha Oneminussrcalpha, and it worked.

Ok. The rest is Baidu his role, this is not my job. Ha ha

http://download.csdn.net/detail/lihuozhiling/8365965

shader-application v&f for transparent materials