drewcassidy/KSP-Conformal-Decals
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Big refactor to enable preview materials

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• add shader variants for decal previewing
• start to add code for part icon
• refactor material properties to be serializable
todo:
• fix decal preview scale (need to call UpdateScale on detached state)
• fix texture preview in part icon
• adjust culling per-object when rendering (turns out cull and ztest values are used by unity at the render time, not by the shader itself, so they can be adjusted in material property blocks!)
This commit is contained in:
Andrew Cassidy
2020-06-04 00:12:09 -07:00
parent 6c20675a99
commit e9c8f3dafb
17 changed files with 471 additions and 326 deletions
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82
Assets/Shaders/DecalsCommon.cginc
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@ -18,10 +18,9 @@ struct DecalSurfaceInput
#endif //DECAL_EMISSIVE
#ifdef DECAL_BASE_NORMAL
float2 uv_base;
#endif //DECAL_BASE_NORMAL
float3 normal;
#endif
float3 normal;
float3 viewDir;
float3 worldPosition;
};
@ -30,10 +29,10 @@ struct appdata_decal
{
float4 vertex : POSITION;
float3 normal : NORMAL;
#ifdef DECAL_BASE_NORMAL
#if defined(DECAL_BASE_NORMAL) || defined(DECAL_PREVIEW)
float4 texcoord : TEXCOORD0;
float4 tangent : TANGENT;
#endif //DECAL_BASE_NORMAL
#endif
};
struct v2f
@ -65,6 +64,23 @@ float4x4 _ProjectionMatrix;
float3 _DecalNormal;
float3 _DecalTangent;
#ifdef DECAL_BASE_NORMAL
sampler2D _BumpMap;
float4 _BumpMap_ST;
#endif //DECAL_BASE_NORMAL
float _Cutoff;
float _DecalOpacity;
float _Opacity;
float4 _Background;
inline void decalClipAlpha(float alpha) {
#ifndef DECAL_PREVIEW
clip(alpha - _Cutoff + 0.01);
#endif
}
// declare surf function,
// this must be defined in any shader using this cginc
void surf (DecalSurfaceInput IN, inout SurfaceOutput o);
@ -76,7 +92,12 @@ v2f vert_forward(appdata_decal v)
o.pos = UnityObjectToClipPos(v.vertex);
o.normal = v.normal;
o.uv_decal = mul (_ProjectionMatrix, v.vertex);
#ifdef DECAL_PREVIEW
o.uv_decal = v.texcoord;
#else
o.uv_decal = mul (_ProjectionMatrix, v.vertex);
#endif //DECAL_PREVIEW
#ifdef DECAL_BASE_NORMAL
o.uv_base = TRANSFORM_TEX(v.texcoord, _BumpMap);
@ -85,7 +106,7 @@ v2f vert_forward(appdata_decal v)
float3 worldPosition = mul(unity_ObjectToWorld, v.vertex).xyz;
float3 worldNormal = UnityObjectToWorldNormal(v.normal);
#ifdef DECAL_BASE_NORMAL
#if defined(DECAL_BASE_NORMAL) || defined(DECAL_PREVIEW)
// use tangent of base geometry
fixed3 worldTangent = UnityObjectToWorldDir(v.tangent.xyz);
fixed tangentSign = v.tangent.w * unity_WorldTransformParams.w;
@ -95,7 +116,7 @@ v2f vert_forward(appdata_decal v)
fixed3 decalTangent = UnityObjectToWorldDir(_DecalTangent);
fixed3 worldBinormal = cross(decalTangent, worldNormal);
fixed3 worldTangent = cross(worldNormal, worldBinormal);
#endif //DECAL_BASE_NORMAL
#endif //defined(DECAL_BASE_NORMAL) || defined(DECAL_PREVIEW)
o.tSpace0 = float4(worldTangent.x, worldBinormal.x, worldNormal.x, worldPosition.x);
o.tSpace1 = float4(worldTangent.y, worldBinormal.y, worldNormal.y, worldPosition.y);
@ -148,22 +169,26 @@ fixed4 frag_forward(v2f IN) : SV_Target
float3 worldViewDir = normalize(UnityWorldSpaceViewDir(worldPosition));
float3 viewDir = _unity_tbn_0 * worldViewDir.x + _unity_tbn_1 * worldViewDir.y + _unity_tbn_2 * worldViewDir.z;
// perform decal projection
fixed4 uv_projected = UNITY_PROJ_COORD(IN.uv_decal);
#ifdef DECAL_PREVIEW
fixed4 uv_projected = IN.uv_decal;
#else
// perform decal projection
fixed4 uv_projected = UNITY_PROJ_COORD(IN.uv_decal);
// clip texture outside of xyz bounds
clip(uv_projected.xyz);
clip(1-uv_projected.xyz);
// clip backsides
clip(dot(_DecalNormal, IN.normal));
// clip texture outside of xyz bounds
clip(uv_projected.xyz);
clip(1-uv_projected.xyz);
// clip backsides
clip(dot(_DecalNormal, IN.normal));
#endif //DECAL_PREVIEW
// initialize surface input
UNITY_INITIALIZE_OUTPUT(DecalSurfaceInput, i)
i.uv_decal = TRANSFORM_TEX(uv_projected, _Decal);
#ifdef DECAL_NORMAL
i.uv_bump = TRANSFORM_TEX(uv_projected, _BumpMap);
i.uv_bump = TRANSFORM_TEX(uv_projected, _DecalBumpMap);
#endif //DECAL_NORMAL
#ifdef DECAL_SPECULAR
@ -173,12 +198,16 @@ fixed4 frag_forward(v2f IN) : SV_Target
#ifdef DECAL_EMISSIVE
i.uv_glow = TRANSFORM_TEX(uv_projected, _GlowMap);
#endif //DECAL_EMISSIVE
#ifdef DECAL_BASE_NORMAL
i.uv_base = IN.uv_base;
#endif //DECAL_BASE_NORMAL
i.normal = IN.normal;
#ifdef DECAL_BASE_NORMAL
#ifdef DECAL_PREVIEW
i.normal = fixed3(0,0,1);
#else
i.normal = UnpackNormal(tex2D(_BumpMap, IN.uv_base));
#endif //DECAL_PREVIEW
#endif //DECAL_BASE_NORMAL
//i.normal = IN.normal;
i.viewDir = viewDir;
i.worldPosition = worldPosition;
@ -192,6 +221,14 @@ fixed4 frag_forward(v2f IN) : SV_Target
// call surface function
surf(i, o);
#ifdef DECAL_PREVIEW
o.Albedo = lerp(_Background.rgb,o.Albedo, o.Alpha);
o.Normal = lerp(float3(0,0,1), o.Normal, o.Alpha);
o.Gloss = lerp(_Background.a, o.Gloss, o.Alpha);
o.Emission = lerp(0, o.Emission, o.Alpha);
o.Alpha = _Opacity;
#endif //DECAL_PREVIEW
// compute lighting & shadowing factor
UNITY_LIGHT_ATTENUATION(atten, IN, worldPosition)
@ -203,7 +240,6 @@ fixed4 frag_forward(v2f IN) : SV_Target
WorldNormal.z = dot(_unity_tbn_2, o.Normal);
WorldNormal = normalize(WorldNormal);
o.Normal = WorldNormal;
//KSP lighting function
c += LightingBlinnPhongSmooth(o, lightDir, worldViewDir, atten);