diff options
| -rw-r--r-- | triplanar.cginc | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/triplanar.cginc b/triplanar.cginc new file mode 100644 index 0000000..0deb8a7 --- /dev/null +++ b/triplanar.cginc @@ -0,0 +1,43 @@ +#ifndef __TRIPLANAR_INC +#define __TRIPLANAR_INC + +#include "burley.cginc" +#include "globals.cginc" +#include "math.cginc" + +#if defined(TRIPLANAR) +void sample_triplanar(texture2D tex, float3 uv, out float4 s0, out float4 s1, out float4 s2) { + s0 = tex.Sample(aniso4_trilinear_repeat_s, uv.yz); + s1 = tex.Sample(aniso4_trilinear_repeat_s, uv.xz); + s2 = tex.Sample(aniso4_trilinear_repeat_s, uv.xy); +} + +float3 triplanar_weights(float3 worldNormal, float3 uv) { + float3 weights = abs(worldNormal); + return weights / (weights.x + weights.y + weights.z); +} +#endif + +void apply_triplanar_layers(float3 worldPos, float3 normal_world, inout Pbr pbr, inout float3 normal_tangent) { +#if defined(TRIPLANAR) + float3 weights = triplanar_weights(normal_world, worldPos); +#if defined(_TRIPLANAR_LAYER0) + { + float3 uv = worldPos * _Triplanar_Layer0_Scale; + float4 a0, a1, a2; + sample_triplanar(_Triplanar_Layer0_MainTex, uv, a0, a1, a2); + float3 albedo = a0 * weights.x + a1 * weights.y + a2 * weights.z; +#if defined(_TRIPLANAR_LAYER0_BURLEY) + float3 burley_weights = burley_apply_blend_gamma(weights, _Triplanar_Layer0_Burley_Blend_Gamma); + albedo = burley_degaussianize( + _Triplanar_Layer0_MainTex_Burley_LUT, + burley_apply_soft_clipping(albedo, burley_weights), + true); +#endif // _TRIPLANAR_LAYER0_BURLEY + pbr.albedo.rgb = albedo; + } +#endif // _TRIPLANAR_LAYER0 +#endif // TRIPLANAR +} + +#endif // __TRIPLANAR_INC |