shadows

src/shaders/shader.frag

@@ -13,6 +13,7 @@ layout(set=0,binding=0) uniform Uniforms {
     mat4 _ViewMatrix;
     mat4 _ProjMatrixInv;
     vec3 _CamPos;
+    vec3 _SunDir;
     float _Time;
 };
 layout(set=1,binding=0) uniform usampler3D _NodesTexture;
@@ -27,16 +28,27 @@ layout(set=3, binding=0) uniform Materials {
 // #define NEAR 0.01
 
 // Include
+#include "structs.cginc"
 #include "shading.cginc"
 #include "raycasting.cginc"
 
 
 void main() 
 {
+    // Black by default
+    out_color = vec4(0,0,0,1);
+
     // Calculate ray direction
     vec3 view_dir = (_ProjMatrixInv * vec4(vert_uv, 0, 1)).xyz;
     vec3 ray_dir = normalize(_ViewMatrix * vec4(view_dir,0)).xyz;
 
     // Raycast
-    out_color = vec4(castNodes(_CamPos, ray_dir), 1.0);
+    HitResult primary = castNodes(_CamPos, ray_dir);
+    if(primary.data > 0)
+    {
+        out_color = vec4(applyLighting(primary.pos, ray_dir, primary.normal, primary.data), 1.0);
+
+        HitResult shadow = castNodes(primary.pos-ray_dir*0.000001, _SunDir);
+        if(shadow.data > 0) out_color *= 0.1;
+    }
 }