Add language for DirectX 3D model files (#4682)

* add language for DirectX 3D model files

* DirectX 3D model file: allow 0302 version in heuristic

lib/linguist/heuristics.yml

@@ -465,6 +465,8 @@ disambiguations:
     pattern: '^@(<|\w+\.)'
 - extensions: ['.x']
   rules:
+  - language: DirectX 3D File
+    pattern:  '^xof 030(2|3)(?:txt|bin|tzip|bzip)\b'
   - language: RPC
     pattern: '\b(program|version)\s+\w+\s*{|\bunion\s+\w+\s+switch\s*\('
   - language: Logos

lib/linguist/languages.yml

@@ -1132,6 +1132,13 @@ Diff:
   codemirror_mode: diff
   codemirror_mime_type: text/x-diff
   language_id: 88
+DirectX 3D File:
+  type: data
+  extensions:
+  - ".x"
+  ace_mode: text
+  tm_scope: none
+  language_id: 201049282
 Dockerfile:
   type: programming
   color: "#384d54"

samples/DirectX 3D File/cube.x

@@ -0,0 +1,95 @@
+xof 0303txt 0032
+
+Frame Root {
+  FrameTransformMatrix {
+     1.000000, 0.000000, 0.000000, 0.000000,
+     0.000000,-0.000000, 1.000000, 0.000000,
+     0.000000, 1.000000, 0.000000, 0.000000,
+     0.000000, 0.000000, 0.000000, 1.000000;;
+  }
+  Frame Cube {
+    FrameTransformMatrix {
+       1.000000, 0.000000, 0.000000, 0.000000,
+       0.000000, 1.000000, 0.000000, 0.000000,
+       0.000000, 0.000000, 1.000000, 0.000000,
+       0.000000, 0.000000, 0.000000, 1.000000;;
+    }
+    Mesh { // Cube mesh
+      24;
+      -1.000000;-1.000000;-1.000000;,
+      -1.000000;-1.000000; 1.000000;,
+      -1.000000; 1.000000; 1.000000;,
+      -1.000000; 1.000000;-1.000000;,
+      -1.000000; 1.000000;-1.000000;,
+      -1.000000; 1.000000; 1.000000;,
+       1.000000; 1.000000; 1.000000;,
+       1.000000; 1.000000;-1.000000;,
+       1.000000; 1.000000;-1.000000;,
+       1.000000; 1.000000; 1.000000;,
+       1.000000;-1.000000; 1.000000;,
+       1.000000;-1.000000;-1.000000;,
+       1.000000;-1.000000;-1.000000;,
+       1.000000;-1.000000; 1.000000;,
+      -1.000000;-1.000000; 1.000000;,
+      -1.000000;-1.000000;-1.000000;,
+      -1.000000; 1.000000;-1.000000;,
+       1.000000; 1.000000;-1.000000;,
+       1.000000;-1.000000;-1.000000;,
+      -1.000000;-1.000000;-1.000000;,
+       1.000000; 1.000000; 1.000000;,
+      -1.000000; 1.000000; 1.000000;,
+      -1.000000;-1.000000; 1.000000;,
+       1.000000;-1.000000; 1.000000;;
+      6;
+      4;3,2,1,0;,
+      4;7,6,5,4;,
+      4;11,10,9,8;,
+      4;15,14,13,12;,
+      4;19,18,17,16;,
+      4;23,22,21,20;;
+      MeshNormals { // Cube normals
+        6;
+        -1.000000;-0.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         0.000000;-1.000000; 0.000000;,
+         0.000000; 0.000000;-1.000000;,
+         0.000000;-0.000000; 1.000000;;
+        6;
+        4;0,0,0,0;,
+        4;1,1,1,1;,
+        4;2,2,2,2;,
+        4;3,3,3,3;,
+        4;4,4,4,4;,
+        4;5,5,5,5;;
+      } // End of Cube normals
+      MeshTextureCoords { // Cube UV coordinates
+        24;
+         0.666667; 0.666667;,
+         0.333333; 0.666667;,
+         0.333333; 1.000000;,
+         0.666667; 1.000000;,
+         0.333333; 0.333333;,
+         0.000000; 0.333333;,
+         0.000000; 0.666667;,
+         0.333333; 0.666667;,
+         0.333333; 0.666667;,
+         0.000000; 0.666667;,
+         0.000000; 1.000000;,
+         0.333333; 1.000000;,
+         0.333333; 0.333333;,
+         0.333333; 0.666667;,
+         0.666667; 0.666667;,
+         0.666667; 0.333333;,
+         1.000000; 0.666667;,
+         0.666667; 0.666667;,
+         0.666667; 1.000000;,
+         1.000000; 1.000000;,
+         0.333333; 0.333333;,
+         0.333333; 0.000000;,
+         0.000000; 0.000000;,
+         0.000000; 0.333333;;
+      } // End of Cube UV coordinates
+    } // End of Cube mesh
+  } // End of Cube
+} // End of Root

test/test_heuristics.rb

@@ -518,6 +518,7 @@ class TestHeuristics < Minitest::Test
   def test_x_by_heuristics
     # Logos not fully covered
     assert_heuristics({
+      "DirectX 3D File" => all_fixtures("DirectX 3D File", "*.x"),
       "Linker Script" => all_fixtures("Linker Script", "*.x"),
       "RPC" => all_fixtures("RPC", "*.x")
     })