drewcassidy/KSP-Conformal-Decals
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Compute world-space normal in programmable portion of the shader

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This commit is contained in:
Andrew Cassidy
2020-05-24 16:48:37 -07:00
parent 8382a97b72
commit 289988cf11
2 changed files with 47 additions and 14 deletions
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28
Assets/Shaders/DecalsCommon.cginc
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@ -1,6 +1,17 @@
#ifndef DECALS_COMMON_INCLUDED
#define DECALS_COMMON_INCLUDED
inline fixed3 OrientNormal(float3 normal, float4 tSpace0, float4 tSpace1, float4 tSpace2) {
float3 WorldNormal;
WorldNormal.x = dot(tSpace0.xyz, normal);
WorldNormal.y = dot(tSpace1.xyz, normal);
WorldNormal.z = dot(tSpace2.xyz, normal);
WorldNormal = normalize(WorldNormal);
return WorldNormal;
}
#define DECAL_ORIENT_NORMAL(normal, IN) OrientNormal(normal, IN.tSpace0, IN.tSpace1, IN.tSpace2)
struct DecalSurfaceInput
{
float4 uv_decal;
@ -9,6 +20,11 @@ struct DecalSurfaceInput
#endif //DECAL_BASE_NORMAL
float3 normal;
float3 viewDir;
float3 worldPosition;
float4 tSpace0;
float4 tSpace1;
float4 tSpace2;
};
struct appdata_decal
@ -140,6 +156,10 @@ fixed4 frag_forward(v2f IN) : SV_Target
#endif
i.normal = IN.normal;
i.viewDir = viewDir;
i.worldPosition = worldPosition;
i.tSpace0 = IN.tSpace0;
i.tSpace1 = IN.tSpace1;
i.tSpace2 = IN.tSpace2;
// initialize surface output
o.Albedo = 0.0;
@ -155,14 +175,6 @@ fixed4 frag_forward(v2f IN) : SV_Target
// compute lighting & shadowing factor
UNITY_LIGHT_ATTENUATION(atten, IN, worldPosition)
// compute world normal
float3 WorldNormal;
WorldNormal.x = dot(_unity_tbn_0, o.Normal);
WorldNormal.y = dot(_unity_tbn_1, o.Normal);
WorldNormal.z = dot(_unity_tbn_2, o.Normal);
WorldNormal = normalize(WorldNormal);
o.Normal = WorldNormal;
//KSP lighting function
c += LightingBlinnPhongSmooth(o, lightDir, viewDir, atten);