Load model textures checkpoint.

Refactors some Vulkan items related to CompGrBinds and EntityTypes.
Adds some Vulkan globals related to textures.

Adds a number of placeholder items:
- Iffy use of setting Vulkan globals on instanced structs.
- Unimplemented and inaccurate shaders
- Iffy gltf sub-buffer logic (ignores vertex color data)
- MipMap TODOs
- TextureArray TODOs

3 files changed, 49 insertions, 20 deletions

diff --git a/assets/models/cube.bin b/assets/models/cube.bin
index c59221c..6223cf0 100644
--- a/assets/models/cube.bin
+++ b/assets/models/cube.bin
diff --git a/assets/models/cube.gltf b/assets/models/cube.gltf
index 5077394..9bc8a22 100644
--- a/assets/models/cube.gltf
+++ b/assets/models/cube.gltf
@@ -21,14 +21,11 @@
 	"materials":[
 		{
 			"doubleSided":true,
-			"name":"Material",
+			"name":"Material.001",
 			"pbrMetallicRoughness":{
-				"baseColorFactor":[
-					0.800000011920929,
-					0.800000011920929,
-					0.800000011920929,
-					1
-				],
+				"baseColorTexture":{
+					"index":0
+				},
 				"metallicFactor":0,
 				"roughnessFactor":0.5
 			}
@@ -36,25 +33,45 @@
 	],
 	"meshes":[
 		{
-			"name":"Cube",
+			"name":"Cube.001",
 			"primitives":[
 				{
 					"attributes":{
-						"POSITION":0,
-						"NORMAL":1,
-						"TEXCOORD_0":2
+						"COLOR_0":0,
+						"POSITION":1,
+						"NORMAL":2,
+						"TEXCOORD_0":3
 					},
-					"indices":3,
+					"indices":4,
 					"material":0
 				}
 			]
 		}
 	],
+	"textures":[
+		{
+			"sampler":0,
+			"source":0
+		}
+	],
+	"images":[
+		{
+			"mimeType":"image/png",
+			"name":"cube",
+			"uri":"cube.png"
+		}
+	],
 	"accessors":[
 		{
 			"bufferView":0,
 			"componentType":5126,
 			"count":24,
+			"type":"VEC4"
+		},
+		{
+			"bufferView":1,
+			"componentType":5126,
+			"count":24,
 			"max":[
 				1,
 				1,
@@ -68,19 +85,19 @@
 			"type":"VEC3"
 		},
 		{
-			"bufferView":1,
+			"bufferView":2,
 			"componentType":5126,
 			"count":24,
 			"type":"VEC3"
 		},
 		{
-			"bufferView":2,
+			"bufferView":3,
 			"componentType":5126,
 			"count":24,
 			"type":"VEC2"
 		},
 		{
-			"bufferView":3,
+			"bufferView":4,
 			"componentType":5123,
 			"count":36,
 			"type":"SCALAR"
@@ -89,32 +106,44 @@
 	"bufferViews":[
 		{
 			"buffer":0,
-			"byteLength":288,
+			"byteLength":384,
 			"byteOffset":0,
 			"target":34962
 		},
 		{
 			"buffer":0,
 			"byteLength":288,
-			"byteOffset":288,
+			"byteOffset":384,
+			"target":34962
+		},
+		{
+			"buffer":0,
+			"byteLength":288,
+			"byteOffset":672,
 			"target":34962
 		},
 		{
 			"buffer":0,
 			"byteLength":192,
-			"byteOffset":576,
+			"byteOffset":960,
 			"target":34962
 		},
 		{
 			"buffer":0,
 			"byteLength":72,
-			"byteOffset":768,
+			"byteOffset":1152,
 			"target":34963
 		}
 	],
+	"samplers":[
+		{
+			"magFilter":9729,
+			"minFilter":9987
+		}
+	],
 	"buffers":[
 		{
-			"byteLength":840,
+			"byteLength":1224,
 			"uri":"cube.bin"
 		}
 	]
diff --git a/assets/models/cube.png b/assets/models/cube.png
new file mode 100644
index 0000000..74a7e29
--- /dev/null
+++ b/assets/models/cube.png