Simple diffuse shader using ShaderLab in Unity
September 3, 2017 Leave a comment
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "Custom/SimpleShader" {
Properties {
_AmbientLightColor("Ambient Light", Color) = (1,1,1,1)
_AmbientLightIntensity("Ambient Light Intensity", Range(0.0,1.0)) = 1.0
_DiffuseDirection("Diffuse Light Direction", Vector) = (0.2,0.8,0.7,1)
_DiffuseColor("Diffuse Light Color", Color)=(1,1,1,1)
_DiffuseIntensity("Diffuse Light Intensity", Range(0.0,1.0))=1.0
}
SubShader
{
Pass
{
CGPROGRAM
#pragma vertex vertexShader
#pragma fragment fragmentShader
fixed4 _AmbientLightColor;
float _AmbientLightIntensity;
float3 _DiffuseDirection;
float4 _DiffuseColor;
float _DiffuseIntensity;
struct VertexShaderInput{
float4 position : POSITION;
float3 normal : NORMAL;
};
struct VertexShaderOutput{
float4 position : SV_POSITION;
float3 normal : NORMAL;
};
//Input : VertexShaderInput
//Output: VertexShaderOutput
VertexShaderOutput vertexShader(VertexShaderInput vIn)
{
//The vertex position is multiplied
//with the MVP matrices of Unity.
; VertexShaderOutput vOut;
vOut.position = UnityObjectToClipPos(vIn.position);
vOut.normal = vIn.normal;
return vOut;
}
//OUTPUT : A render target
float4 fragmentShader(VertexShaderOutput vOut) : SV_Target
{
float diffuseFactor = saturate(dot(_DiffuseDirection, vOut.normal));
return (_AmbientLightColor * _AmbientLightIntensity) +
(diffuseFactor * _DiffuseColor * _DiffuseIntensity);
}
ENDCG
}
}
}
)
