Add shadows

1 files changed, 28 insertions, 4 deletions

diff --git a/lighting.cginc b/lighting.cginc
index 51b0c8f..04cff3c 100755
--- a/lighting.cginc
+++ b/lighting.cginc
@@ -183,14 +183,14 @@ float3 yumSH9(float4 n, float3 worldPos, inout LightIndirect light) {
   return L0 + L1 + L2;
 }
 
-float4 getIndirectDiffuse(v2f i, Pbr pbr, inout LightIndirect light) {
+float4 getIndirectDiffuse(v2f i, Pbr pbr, inout LightData light) {
   float4 diffuse = 0;
 
 #if defined(FORWARD_BASE_PASS) || defined(OUTLINES_PASS)
 #if defined(_BENT_NORMALS)
-  diffuse.xyz += max(0, yumSH9(float4(pbr.bent_normal, 1.0), i.worldPos, light));
+  diffuse.xyz += max(0, yumSH9(float4(pbr.bent_normal, 1.0), i.worldPos, light.indirect));
 #else
-  diffuse.xyz += max(0, yumSH9(float4(i.normal, 1.0), i.worldPos, light));
+  diffuse.xyz += max(0, yumSH9(float4(i.normal, 1.0), i.worldPos, light.indirect));
 #endif
 #endif
 
@@ -200,6 +200,30 @@ float4 getIndirectDiffuse(v2f i, Pbr pbr, inout LightIndirect light) {
   diffuse.xyz = HSVtoRGB(diffuse_hsv);
 #endif
 
+#if defined(_SHADOWS)
+  //diffuse.xyz = lerp(diffuse.xyz, _Shadow_0_Color.rgb, _Shadow_0_Threshold);
+  float3x3 mat = float3x3(
+    light.indirect.L01r,
+    light.indirect.L01g,
+    light.indirect.L01b
+  );
+  float3 dom_dir = normalize(mul(mat, diffuse.xyz));
+  float light_amount = dot(dom_dir, pbr.normal);
+  float3 shadow_color = lerp(
+    _Shadow_0_Color.rgb,
+    1,
+    smoothstep(_Shadow_0_Threshold - _Shadow_0_Blur, _Shadow_0_Threshold + _Shadow_0_Blur, light_amount));
+
+#if defined(_SHADOW_1)
+  shadow_color = lerp(
+    _Shadow_1_Color.rgb,
+    shadow_color,
+    smoothstep(_Shadow_1_Threshold - _Shadow_1_Blur, _Shadow_1_Threshold + _Shadow_1_Blur, light_amount));
+#endif  // _SHADOW_1
+
+  diffuse.xyz *= shadow_color;
+#endif
+
 #if defined(_AMBIENT_OCCLUSION)
   diffuse.xyz *= pbr.ao;
 #endif
@@ -291,7 +315,7 @@ void GetLighting(v2f i, Pbr pbr, out LightData data) {
   data.indirect.LoV = saturate(indirect_LoV);
   data.indirect.double_LoV = saturate(2.0f * indirect_LoV * indirect_LoV - 1.0f);
 
-	data.indirect.diffuse = getIndirectDiffuse(i, pbr, data.indirect);
+	data.indirect.diffuse = getIndirectDiffuse(i, pbr, data);
 	data.indirect.specular = getIndirectSpecular(i, pbr.roughness_perceptual, view_dir, -data.indirect.dir);
 
   data.common.spec_ao = getSpecularAO(i, pbr, data, reflect_dir);