Fix tile parsing and decal rotation

• Decals now respond to rotation and offset tools again
• Fix tile value parsing
• Fix broken normals when projecting on parts with no normal maps

Source/ConformalDecals/DecalConfig.cs

@@ -1,9 +1,13 @@
 using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.Experimental.Rendering;
 
 namespace ConformalDecals {
     public static class DecalConfig {
+        private static Texture2D _blankNormal;
         private static List<string> _shaderBlacklist;
+        
+        public static Texture2D BlankNormal => _blankNormal;
 
         public static bool IsBlacklisted(Shader shader) {
             return IsBlacklisted(shader.name);
@@ -21,6 +25,24 @@ namespace ConformalDecals {
             }
         }
 
+        private static Texture2D MakeBlankNormal() {
+            Debug.Log("ConformalDecals: Generating neutral normal map texture");
+            var width = 2;
+            var height = 2;
+            var color = new Color32(255, 128, 128, 128);
+            var colors = new Color32[] { color, color, color, color };
+
+            var tex = new Texture2D(width, height, TextureFormat.RGBA32, false);
+            for (var x = 0; x <= width; x++) {
+                for (var y = 0; y < height; y++) {
+                    tex.SetPixels32(colors);
+                }
+            }
+            tex.Apply();
+
+            return tex;
+        }
+
         public static void ModuleManagerPostLoad() {
             _shaderBlacklist = new List<string>();
 
@@ -32,6 +54,8 @@ namespace ConformalDecals {
                     ParseConfig(config.config);
                 }
             }
+
+            _blankNormal = MakeBlankNormal();
         }
     }
 }

Source/ConformalDecals/ModuleConformalDecal.cs

@@ -228,6 +228,12 @@ namespace ConformalDecals {
                 }
 
                 // handle texture tiling parameters
+                var tileString = node.GetValue("tile");
+                this.Log(tileString);
+                if (!string.IsNullOrEmpty(tileString)) {
+                    var tileValid = ParseExtensions.TryParseRect(tileString, out tileRect);
+                    if (!tileValid) throw new FormatException($"Invalid rect value for tile '{tileString}'");
+                }
                 if (tileRect.x >= 0) {
                     materialProperties.UpdateTile(tileRect);
                 }
@@ -338,6 +344,7 @@ namespace ConformalDecals {
                     break;
                 case ConstructionEventType.PartOffsetting:
                 case ConstructionEventType.PartRotating:
+                    UpdateScale();
                     break;
             }
         }

Source/ConformalDecals/ProjectionTarget.cs

@@ -1,4 +1,3 @@
-using ConformalDecals.Util;
 using UnityEngine;
 using UnityEngine.Rendering;
 
@@ -35,10 +34,8 @@ namespace ConformalDecals {
             _decalMPB.SetVector(DecalPropertyIDs._DecalNormal, decalNormal);
             _decalMPB.SetVector(DecalPropertyIDs._DecalTangent, decalTangent);
 
-            if (useBaseNormal && targetMaterial.HasProperty(DecalPropertyIDs._BumpMap)) {
+            if (useBaseNormal) {
-                var normal = targetMaterial.GetTexture(DecalPropertyIDs._BumpMap);
+                if (targetMaterial.HasProperty(DecalPropertyIDs._BumpMap)) {
-                if (normal != null) {
-
                     _decalMPB.SetTexture(DecalPropertyIDs._BumpMap, targetMaterial.GetTexture(DecalPropertyIDs._BumpMap));
 
                     var normalScale = targetMaterial.GetTextureScale(DecalPropertyIDs._BumpMap);
@@ -46,6 +43,10 @@ namespace ConformalDecals {
 
                     _decalMPB.SetVector(DecalPropertyIDs._BumpMap_ST, new Vector4(normalScale.x, normalScale.y, normalOffset.x, normalOffset.y));
                 }
+                else {
+                    Debug.Log("Using blank normal");
+                    _decalMPB.SetTexture(DecalPropertyIDs._BumpMap, DecalConfig.BlankNormal);
+                }
             }
         }