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#ifndef __PBR_INC__
#define __PBR_INC__
#include "AutoLight.cginc"
#include "eyes_data.cginc"
#include "UnityPBSLighting.cginc"
static float BG_Effect_Bias = 0.0;
static float BG_Effect_Weight = 1.0;
UnityIndirect GetIndirect(v2f i, float3 view_dir, float smoothness) {
UnityIndirect indirect;
indirect.diffuse = 0;
indirect.specular = 0;
#if defined(VERTEXLIGHT_ON)
indirect.diffuse = i.vertexLightColor;
#endif
#if defined(FORWARD_BASE_PASS)
indirect.diffuse += max(0, ShadeSH9(float4(i.normal, 1)));
float3 reflect_dir = reflect(-view_dir, i.normal);
// There's a nonlinear relationship between mipmap level and roughness.
float roughness = 1 - smoothness;
roughness *= 1.7 - .7 * roughness;
float3 env_sample;
env_sample = UNITY_SAMPLE_TEXCUBE_LOD(
unity_SpecCube0,
reflect_dir,
roughness * UNITY_SPECCUBE_LOD_STEPS);
indirect.specular = env_sample;
#endif
return indirect;
}
UnityLight GetLight(v2f i)
{
UNITY_LIGHT_ATTENUATION(attenuation, 0, i.worldPos);
float3 light_color = _LightColor0.rgb * attenuation;
UnityLight light;
light.color = light_color;
#if defined(POINT) || defined(POINT_COOKIE) || defined(SPOT)
light.dir = normalize(_WorldSpaceLightPos0.xyz - i.worldPos);
#else
light.dir = _WorldSpaceLightPos0.xyz;
#endif
light.ndotl = DotClamped(i.normal, light.dir);
return light;
}
void initNormal(inout v2f i)
{
i.normal = normalize(i.normal);
}
float4 light(inout v2f i,
float4 albedo,
float metallic,
float smoothness)
{
initNormal(i);
float3 specular_tint;
float one_minus_reflectivity;
albedo.rgb = DiffuseAndSpecularFromMetallic(
albedo, metallic, specular_tint, one_minus_reflectivity);
float3 view_dir = normalize(_WorldSpaceCameraPos - i.worldPos);
float3 pbr = UNITY_BRDF_PBS(albedo,
specular_tint,
one_minus_reflectivity,
smoothness,
i.normal,
view_dir,
GetLight(i),
GetIndirect(i, view_dir, smoothness)).rgb;
return float4(saturate(pbr), albedo.a);
}
float getWorldSpaceDepth(in float3 world_pos)
{
float4 clip_pos = mul(UNITY_MATRIX_VP, float4(world_pos, 1.0));
return clip_pos.z / clip_pos.w;
}
#endif // __PBR_INC__
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