Adding KHR_materials_retroreflection example

Models/TrafficCone/license.txt

@@ -0,0 +1,11 @@
+Model Information:
+* title:	Traffic Cone
+* source:	https://sketchfab.com/3d-models/traffic-cone-573feef839d7450cb3e12da9986e7a98
+* author:	hinndia (https://sketchfab.com/hinndia)
+
+Model License:
+* license type:	CC-BY-4.0 (http://creativecommons.org/licenses/by/4.0/)
+* requirements:	Author must be credited. Commercial use is allowed.
+
+If you use this 3D model in your project be sure to copy paste this credit wherever you share it:
+This work is based on "Traffic Cone" (https://sketchfab.com/3d-models/traffic-cone-573feef839d7450cb3e12da9986e7a98) by hinndia (https://sketchfab.com/hinndia) licensed under CC-BY-4.0 (http://creativecommons.org/licenses/by/4.0/)

Models/TrafficCone/traffic_cone.gltf

@@ -0,0 +1,342 @@
+{
+  "accessors": [
+    {
+      "bufferView": 2,
+      "componentType": 5126,
+      "count": 11089,
+      "min": [
+        -0.2099796086549759,
+        -0.2099796086549759,
+        -0.2695193290710449
+      ],
+      "max": [
+        0.2099796086549759,
+        0.2099796086549759,
+        0.2493087500333786
+      ],
+      "type": "VEC3"
+    },
+    {
+      "bufferView": 2,
+      "byteOffset": 133068,
+      "componentType": 5126,
+      "count": 11089,
+      "min": [
+        -1.0,
+        -1.0,
+        -1.0
+      ],
+      "max": [
+        1.0,
+        1.0,
+        1.0
+      ],
+      "type": "VEC3"
+    },
+    {
+      "bufferView": 1,
+      "componentType": 5126,
+      "count": 11089,
+      "min": [
+        0.0001785983331501484,
+        0.0001785983331501484
+      ],
+      "max": [
+        0.794103741645813,
+        0.9998215436935424
+      ],
+      "type": "VEC2"
+    },
+    {
+      "bufferView": 0,
+      "componentType": 5125,
+      "count": 25440,
+      "type": "SCALAR"
+    }
+  ],
+  "asset": {
+    "generator": "Sketchfab-14.79.0 + NVIDIA vk_gltf_renderer GitHubSync-3-ga11cace-dirty",
+    "version": "2.0",
+    "extras": {
+      "author": "hinndia (https://sketchfab.com/hinndia)",
+      "license": "CC-BY-4.0 (http://creativecommons.org/licenses/by/4.0/)",
+      "source": "https://sketchfab.com/3d-models/traffic-cone-573feef839d7450cb3e12da9986e7a98",
+      "title": "Traffic Cone"
+    }
+  },
+  "bufferViews": [
+    {
+      "buffer": 0,
+      "byteLength": 101760,
+      "target": 34963,
+      "name": "floatBufferViews"
+    },
+    {
+      "buffer": 0,
+      "byteLength": 88712,
+      "byteStride": 8,
+      "byteOffset": 101760,
+      "target": 34962,
+      "name": "floatBufferViews"
+    },
+    {
+      "buffer": 0,
+      "byteLength": 266136,
+      "byteStride": 12,
+      "byteOffset": 190472,
+      "target": 34962,
+      "name": "floatBufferViews"
+    }
+  ],
+  "materials": [
+    {
+      "name": "ConeMatRetro",
+      "doubleSided": true,
+      "pbrMetallicRoughness": {
+        "metallicFactor": 0.6700000166893005,
+        "roughnessFactor": 0.35,
+        "baseColorTexture": {
+          "index": 0
+        },
+        "metallicRoughnessTexture": {
+          "index": 1
+        }
+      },
+      "extensions": {
+        "KHR_materials_retroreflection": {
+          "retroreflectionFactor": 1.0,
+          "retroreflectionTexture": {
+            "index": 2
+          }
+        }
+      }
+    },
+    {
+      "name": "ConeBaseMat",
+      "doubleSided": true,
+      "pbrMetallicRoughness": {
+        "metallicFactor": 0.20999999344348907,
+        "roughnessFactor": 0.8299999833106995,
+        "baseColorTexture": {
+          "index": 0
+        },
+        "metallicRoughnessTexture": {
+          "index": 1
+        }
+      }
+    }
+  ],
+  "meshes": [
+    {
+      "primitives": [
+        {
+          "attributes": {
+            "NORMAL": 1,
+            "POSITION": 0,
+            "TEXCOORD_0": 2
+          },
+          "indices": 3,
+          "material": 0,
+          "mode": 4
+        }
+      ],
+      "name": "ConeMesh"
+    },
+    {
+      "primitives": [
+        {
+          "attributes": {
+            "NORMAL": 1,
+            "POSITION": 0,
+            "TEXCOORD_0": 2
+          },
+          "indices": 3,
+          "material": 1,
+          "mode": 4
+        }
+      ],
+      "name": "ConeMeshCopy"
+    }
+  ],
+  "nodes": [
+    {
+      "matrix": [
+        100.0,
+        0.0,
+        0.0,
+        0.0,
+        0.0,
+        -0.00001629206793918314,
+        -99.99999999999868,
+        0.0,
+        0.0,
+        99.99999999999868,
+        -0.00001629206793918314,
+        0.0,
+        0.0,
+        26.749345779418945,
+        0.0,
+        1.0
+      ],
+      "name": "Cones",
+      "children": [
+        1,
+        4
+      ]
+    },
+    {
+      "translation": [
+        -0.30000001192092896,
+        0.0,
+        0.0
+      ],
+      "mesh": 0,
+      "name": "Cone Retroreflection"
+    },
+    {
+      "translation": [
+        0.0,
+        50.000728607177734,
+        150.0031280517578
+      ],
+      "rotation": [
+        -0.11436518281698227,
+        -0.0,
+        -0.0,
+        0.9934387803077698
+      ],
+      "camera": 0,
+      "extras": {
+        "camera::center": [
+          0.0,
+          15.00072956085205,
+          0.0031277318485081196
+        ],
+        "camera::eye": [
+          0.0,
+          50.000728607177734,
+          150.0031280517578
+        ],
+        "camera::up": [
+          0.0,
+          1.0,
+          0.0
+        ]
+      },
+      "name": "Camera"
+    },
+    {
+      "translation": [
+        0.0,
+        0.34038978815078735,
+        0.6407261490821838
+      ],
+      "rotation": [
+        -0.13795897364616394,
+        0.08151177316904068,
+        0.011393253691494463,
+        0.9870123267173768
+      ],
+      "extensions": {
+        "KHR_lights_punctual": {
+          "light": 0
+        }
+      },
+      "name": "Directional Light"
+    },
+    {
+      "translation": [
+        0.30000001192092896,
+        0.0,
+        0.0
+      ],
+      "mesh": 1,
+      "name": "Cone Normal"
+    }
+  ],
+  "scene": 0,
+  "scenes": [
+    {
+      "nodes": [
+        2,
+        3,
+        0
+      ],
+      "name": "Sketchfab_Scene"
+    }
+  ],
+  "textures": [
+    {
+      "sampler": 0,
+      "source": 0
+    },
+    {
+      "sampler": 0,
+      "source": 1
+    },
+    {
+      "sampler": 0,
+      "source": 2
+    }
+  ],
+  "samplers": [
+    {
+      "magFilter": 9729,
+      "minFilter": 9987,
+      "wrapS": 10497,
+      "wrapT": 10497
+    }
+  ],
+  "cameras": [
+    {
+      "type": "perspective",
+      "name": "Camera",
+      "perspective": {
+        "zfar": 200.0,
+        "znear": 0.10000000149011612,
+        "aspectRatio": 1.7777777910232544,
+        "yfov": 0.7853981633974483
+      }
+    }
+  ],
+  "extensions": {
+    "KHR_lights_punctual": {
+      "lights": [
+        {
+          "name": "Directional Light",
+          "intensity": 1.2999999523162842,
+          "color": [
+            1.0,
+            1.0,
+            1.0
+          ],
+          "type": "directional",
+          "extras": {
+            "radius": 0.0
+          }
+        }
+      ]
+    }
+  },
+  "extensionsUsed": [
+    "KHR_lights_punctual",
+    "KHR_materials_retroreflection"
+  ],
+  "buffers": [
+    {
+      "byteLength": 456608,
+      "uri": "traffic_cone.bin"
+    }
+  ],
+  "images": [
+    {
+      "uri": "images/ConeBaseMat_baseColor.png"
+    },
+    {
+      "uri": "images/ConeBaseMat_metallicRoughness.png"
+    },
+    {
+      "uri": "images/ConeBaseMat_retroreflective.png"
+    }
+  ]
+}