gradientShader.shader

// Shader created with Shader Forge v1.38 
// Shader Forge (c) Neat Corporation / Joachim Holmer - http://www.acegikmo.com/shaderforge/
// Note: Manually altering this data may prevent you from opening it in Shader Forge
/*SF_DATA;ver:1.38;sub:START;pass:START;ps:flbk:,iptp:0,cusa:False,bamd:0,cgin:,lico:1,lgpr:1,limd:1,spmd:1,trmd:0,grmd:0,uamb:True,mssp:True,bkdf:False,hqlp:False,rprd:False,enco:False,rmgx:True,imps:True,rpth:0,vtps:0,hqsc:True,nrmq:1,nrsp:0,vomd:0,spxs:False,tesm:0,olmd:1,culm:0,bsrc:0,bdst:1,dpts:2,wrdp:True,dith:0,atcv:False,rfrpo:True,rfrpn:Refraction,coma:15,ufog:True,aust:True,igpj:False,qofs:0,qpre:2,rntp:3,fgom:False,fgoc:False,fgod:False,fgor:False,fgmd:0,fgcr:1,fgcg:1,fgcb:1,fgca:1,fgde:0.01,fgrn:5,fgrf:15,stcl:False,atwp:False,stva:128,stmr:255,stmw:255,stcp:6,stps:0,stfa:0,stfz:0,ofsf:0,ofsu:0,f2p0:False,fnsp:False,fnfb:False,fsmp:False;n:type:ShaderForge.SFN_Final,id:4904,x:33076,y:32617,varname:node_4904,prsc:2|diff-5996-OUT,clip-8651-A;n:type:ShaderForge.SFN_Color,id:848,x:32186,y:32549,ptovrint:False,ptlb:ColorBottom,ptin:_ColorBottom,varname:_Color,prsc:2,glob:False,taghide:False,taghdr:False,tagprd:False,tagnsco:False,tagnrm:False,c1:0.5,c2:0.5,c3:0.5,c4:1;n:type:ShaderForge.SFN_Color,id:3661,x:32020,y:32549,ptovrint:False,ptlb:Color,ptin:_Color,varname:_Color_bottom,prsc:2,glob:False,taghide:False,taghdr:False,tagprd:False,tagnsco:False,tagnrm:False,c1:0.5,c2:0.5,c3:0.5,c4:1;n:type:ShaderForge.SFN_NormalVector,id:816,x:31904,y:32778,prsc:2,pt:False;n:type:ShaderForge.SFN_Vector3,id:8126,x:31904,y:32934,varname:node_8126,prsc:2,v1:0,v2:-1,v3:0;n:type:ShaderForge.SFN_Dot,id:8650,x:32098,y:32825,varname:node_8650,prsc:2,dt:1|A-816-OUT,B-8126-OUT;n:type:ShaderForge.SFN_Lerp,id:7135,x:32388,y:32654,varname:node_7135,prsc:2|A-848-RGB,B-3661-RGB,T-7377-OUT;n:type:ShaderForge.SFN_Blend,id:7377,x:32388,y:32898,varname:node_7377,prsc:2,blmd:8,clmp:True|SRC-8650-OUT,DST-3879-OUT;n:type:ShaderForge.SFN_Tex2d,id:8651,x:32342,y:32420,ptovrint:False,ptlb:Main,ptin:_Main,varname:_Main,prsc:2,glob:False,taghide:False,taghdr:False,tagprd:False,tagnsco:False,tagnrm:False,ntxv:0,isnm:False;n:type:ShaderForge.SFN_Blend,id:5996,x:32643,y:32554,varname:node_5996,prsc:2,blmd:0,clmp:True|SRC-8651-RGB,DST-7135-OUT;n:type:ShaderForge.SFN_Slider,id:2949,x:31630,y:33263,ptovrint:False,ptlb:Gradient,ptin:_Gradient,varname:_Gradient,prsc:2,glob:False,taghide:False,taghdr:False,tagprd:False,tagnsco:False,tagnrm:False,min:0,cur:1,max:10;n:type:ShaderForge.SFN_Dot,id:6406,x:31630,y:33076,varname:node_6406,prsc:2,dt:0|A-5749-Y,B-7526-OUT;n:type:ShaderForge.SFN_Vector3,id:7526,x:31445,y:33140,varname:node_7526,prsc:2,v1:0,v2:1,v3:0;n:type:ShaderForge.SFN_FragmentPosition,id:5749,x:31445,y:33003,varname:node_5749,prsc:2;n:type:ShaderForge.SFN_Divide,id:3879,x:32006,y:33151,varname:node_3879,prsc:2|A-6406-OUT,B-2949-OUT;proporder:8651-3661-848-2949;pass:END;sub:END;*/

Shader "Kenney/Gradient" {
    Properties {
        _Main ("Main", 2D) = "white" {}
        _Color ("Color", Color) = (0.5,0.5,0.5,1)
        _ColorBottom ("ColorBottom", Color) = (0.5,0.5,0.5,1)
        _Gradient ("Gradient", Range(0, 10)) = 1
        [HideInInspector]_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
    }
    SubShader {
        Tags {
            "Queue"="AlphaTest"
            "RenderType"="TransparentCutout"
        }
        LOD 200
        Pass {
            Name "FORWARD"
            Tags {
                "LightMode"="ForwardBase"
            }
            
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_FORWARDBASE
            #include "UnityCG.cginc"
            #include "AutoLight.cginc"
            #pragma multi_compile_fwdbase_fullshadows
            #pragma multi_compile_fog
            #pragma only_renderers d3d9 d3d11 glcore gles 
            #pragma target 3.0
            uniform float4 _LightColor0;
            uniform float4 _ColorBottom;
            uniform float4 _Color;
            uniform sampler2D _Main; uniform float4 _Main_ST;
            uniform float _Gradient;
            struct VertexInput {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
                float2 texcoord0 : TEXCOORD0;
            };
            struct VertexOutput {
                float4 pos : SV_POSITION;
                float2 uv0 : TEXCOORD0;
                float4 posWorld : TEXCOORD1;
                float3 normalDir : TEXCOORD2;
                LIGHTING_COORDS(3,4)
                UNITY_FOG_COORDS(5)
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.uv0 = v.texcoord0;
                o.normalDir = UnityObjectToWorldNormal(v.normal);
                o.posWorld = mul(unity_ObjectToWorld, v.vertex);
                float3 lightColor = _LightColor0.rgb;
                o.pos = UnityObjectToClipPos( v.vertex );
                UNITY_TRANSFER_FOG(o,o.pos);
                TRANSFER_VERTEX_TO_FRAGMENT(o)
                return o;
            }
            float4 frag(VertexOutput i) : COLOR {
                i.normalDir = normalize(i.normalDir);
                float3 normalDirection = i.normalDir;
                float4 _Main_var = tex2D(_Main,TRANSFORM_TEX(i.uv0, _Main));
                clip(_Main_var.a - 0.5);
                float3 lightDirection = normalize(_WorldSpaceLightPos0.xyz);
                float3 lightColor = _LightColor0.rgb;
 ////// Lighting:
                float attenuation = LIGHT_ATTENUATION(i);
                float3 attenColor = attenuation * _LightColor0.xyz;
/////// Diffuse:
                float NdotL = max(0.0,dot( normalDirection, lightDirection ));
                float3 directDiffuse = max( 0.0, NdotL) * attenColor;
                float3 indirectDiffuse = float3(0,0,0);
                indirectDiffuse += UNITY_LIGHTMODEL_AMBIENT.rgb; // Ambient Light
                float3 diffuseColor = saturate(min(_Main_var.rgb,lerp(_ColorBottom.rgb,_Color.rgb,saturate((max(0,dot(i.normalDir,float3(0,-1,0)))+(dot(i.posWorld.g,float3(0,1,0))/_Gradient))))));
                float3 diffuse = (directDiffuse + indirectDiffuse) * diffuseColor;
/// Final Color:
                float3 finalColor = diffuse;
                fixed4 finalRGBA = fixed4(finalColor,1);
                UNITY_APPLY_FOG(i.fogCoord, finalRGBA);
                return finalRGBA;
            }
            ENDCG
        }
        Pass {
            Name "FORWARD_DELTA"
            Tags {
                "LightMode"="ForwardAdd"
            }
            Blend One One
            
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_FORWARDADD
            #include "UnityCG.cginc"
            #include "AutoLight.cginc"
            #pragma multi_compile_fwdadd_fullshadows
            #pragma multi_compile_fog
            #pragma only_renderers d3d9 d3d11 glcore gles 
            #pragma target 3.0
            uniform float4 _LightColor0;
            uniform float4 _ColorBottom;
            uniform float4 _Color;
            uniform sampler2D _Main; uniform float4 _Main_ST;
            uniform float _Gradient;
            struct VertexInput {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
                float2 texcoord0 : TEXCOORD0;
            };
            struct VertexOutput {
                float4 pos : SV_POSITION;
                float2 uv0 : TEXCOORD0;
                float4 posWorld : TEXCOORD1;
                float3 normalDir : TEXCOORD2;
                LIGHTING_COORDS(3,4)
                UNITY_FOG_COORDS(5)
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.uv0 = v.texcoord0;
                o.normalDir = UnityObjectToWorldNormal(v.normal);
                o.posWorld = mul(unity_ObjectToWorld, v.vertex);
                float3 lightColor = _LightColor0.rgb;
                o.pos = UnityObjectToClipPos( v.vertex );
                UNITY_TRANSFER_FOG(o,o.pos);
                TRANSFER_VERTEX_TO_FRAGMENT(o)
                return o;
            }
            float4 frag(VertexOutput i) : COLOR {
                i.normalDir = normalize(i.normalDir);
                float3 normalDirection = i.normalDir;
                float4 _Main_var = tex2D(_Main,TRANSFORM_TEX(i.uv0, _Main));
                clip(_Main_var.a - 0.5);
                float3 lightDirection = normalize(lerp(_WorldSpaceLightPos0.xyz, _WorldSpaceLightPos0.xyz - i.posWorld.xyz,_WorldSpaceLightPos0.w));
                float3 lightColor = _LightColor0.rgb;
////// Lighting:
                float attenuation = LIGHT_ATTENUATION(i);
                float3 attenColor = attenuation * _LightColor0.xyz;
/////// Diffuse:
                float NdotL = max(0.0,dot( normalDirection, lightDirection ));
                float3 directDiffuse = max( 0.0, NdotL) * attenColor;
                float3 diffuseColor = saturate(min(_Main_var.rgb,lerp(_ColorBottom.rgb,_Color.rgb,saturate((max(0,dot(i.normalDir,float3(0,-1,0)))+(dot(i.posWorld.g,float3(0,1,0))/_Gradient))))));
                float3 diffuse = directDiffuse * diffuseColor;
/// Final Color:
                float3 finalColor = diffuse;
                fixed4 finalRGBA = fixed4(finalColor * 1,0);
                UNITY_APPLY_FOG(i.fogCoord, finalRGBA);
                return finalRGBA;
            }
            ENDCG
        }
        Pass {
            Name "ShadowCaster"
            Tags {
                "LightMode"="ShadowCaster"
            }
            Offset 1, 1
            Cull Back
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_SHADOWCASTER
            #include "UnityCG.cginc"
            #include "Lighting.cginc"
            #pragma fragmentoption ARB_precision_hint_fastest
            #pragma multi_compile_shadowcaster
            #pragma multi_compile_fog
            #pragma only_renderers d3d9 d3d11 glcore gles 
            #pragma target 3.0
            uniform sampler2D _Main; uniform float4 _Main_ST;
            struct VertexInput {
                float4 vertex : POSITION;
                float2 texcoord0 : TEXCOORD0;
            };
            struct VertexOutput {
                V2F_SHADOW_CASTER;
                float2 uv0 : TEXCOORD1;
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.uv0 = v.texcoord0;
                o.pos = UnityObjectToClipPos( v.vertex );
                TRANSFER_SHADOW_CASTER(o)
                return o;
            }
            float4 frag(VertexOutput i) : COLOR {
                float4 _Main_var = tex2D(_Main,TRANSFORM_TEX(i.uv0, _Main));
                clip(_Main_var.a - 0.5);
                SHADOW_CASTER_FRAGMENT(i)
            }
            ENDCG
        }
    }
    FallBack "Diffuse"
    CustomEditor "ShaderForgeMaterialInspector"
}

Feel free to copy, use or improve on this shader.

Thanks man ;)

should i apply this to all world, or just in one object ?

Thanks man, great shader.
Just one question: When I move the object up in space, colors changes. It seems like gradient works in world space. How can I make gradient local to object?
(Sorry I don't know much about shader programming)

Do you have a version to Threejs?

BS6one, just make an .shader file and apply them on new material.