Fold: add hemi octahedron to plane operator

1 files changed, 23 insertions, 0 deletions

diff --git a/vertex.cginc b/vertex.cginc
index e59813c..77412a9 100644
--- a/vertex.cginc
+++ b/vertex.cginc
@@ -14,6 +14,7 @@
 #define OPCODE_SINE_WAVES 7
 #define OPCODE_FBM 8
 #define OPCODE_PLANE_TO_HEMI_OCTAHEDRON 9
+#define OPCODE_HEMI_OCTAHEDRON_TO_PLANE 10
 
 #if defined(_VERTEX_DEFORMATION)
 
@@ -165,6 +166,22 @@ void apply_plane_to_hemi_octahedron_normal(inout float3 objPos, inout float3 obj
   plane_to_hemi_octahedron_normal(objPos, objNorm, objTan, p, r, s, t);
 }
 
+void apply_hemi_octahedron_to_plane(inout float3 objPos, float4 v0, float4 v1, float4 v2, float f0) {
+  float3 p = v0.xyz;
+  float3 r = v1.xyz;
+  float3 s = v2.xyz;
+  float t = f0;
+  objPos = hemi_octahedron_to_plane(objPos, p, r, s, t);
+}
+
+void apply_hemi_octahedron_to_plane_normal(inout float3 objPos, inout float3 objNorm, inout float3 objTan, float4 v0, float4 v1, float4 v2, float f0) {
+  float3 p = v0.xyz;
+  float3 r = v1.xyz;
+  float3 s = v2.xyz;
+  float t = f0;
+  hemi_octahedron_to_plane_normal(objPos, objNorm, objTan, p, r, s, t);
+}
+
 void deform(inout float3 objPos) {
   const float t = getTime();
 
@@ -400,6 +417,9 @@ void deform(inout float3 objPos) {
         case OPCODE_PLANE_TO_HEMI_OCTAHEDRON:
           apply_plane_to_hemi_octahedron(objPos, v0, v1, v2, f0);
           break;
+        case OPCODE_HEMI_OCTAHEDRON_TO_PLANE:
+          apply_hemi_octahedron_to_plane(objPos, v0, v1, v2, f0);
+          break;
       }
     }
   }
@@ -642,6 +662,9 @@ void deform_normal(inout float3 objPos, inout float3 objNorm, inout float3 objTa
         case OPCODE_PLANE_TO_HEMI_OCTAHEDRON:
           apply_plane_to_hemi_octahedron_normal(objPos, objNorm, objTan, v0, v1, v2, f0);
           break;
+        case OPCODE_HEMI_OCTAHEDRON_TO_PLANE:
+          apply_hemi_octahedron_to_plane_normal(objPos, objNorm, objTan, v0, v1, v2, f0);
+          break;
       }
     }
   }