tiles

Paper/3D Tile Formats.txt

+Batch Table
+	JSON Header (UTF8), Binary Body
+	bound to tile fomats (specified , and batch lenght)
+	1. Array of values "name": ['name1', "name2"]
+	2 referenc in binary (offset, type..) -> float vec3 -> array
+	
+Feature Table
+	A Feature Table describes position and appearance properties for each feature in a tile. The Batch Table, on the other hand, contains per-feature application-specific metadata not necessarily used for rendering.
+	header + binary
+	
+	
+Batched 3D Model .b3dm
+	batchLenght number of features (models)
+	magic - version - byteLenght - batchTableJSONByteLenght -batchTableBinaryLenght -batchLenght
+	batchTable, BinaryglTF
+	Batchtable contains model specific MetaData (styling, ..)
+	every vertex has a batchID (technique parameter sematic _BATCHID)
+	
+Instanced 3D Model
+	rendering slight variations (position ), same model with properties
+	inludes feature table and batch table
+	maps well to Opengl ANGLED instance arrays https://www.khronos.org/registry/webgl/extensions/ANGLE_instanced_arrays/
+	Semantics:
+		Position
+		Normal up/right
+		Scale
+		Batch_ID 
+	x is right, y up, z forward
+	unreal kann in irgendeiner weise instancing
+	octet further reading: http://jcgt.org/published/0003/02/01/
+	
+	
+	

Paper/Summary.txt

@@ -36,6 +36,7 @@ glTF -GL Transmission Format "JPEG for 3D"
 	(Animationen / skinning / bones )
 	glTF/loaders : c# threejs
 	Unreal: https://github.com/RobertPoncelet/UnrealGLTFLoader
+	binary gltf
 	
 3D tiles -> Specification for streaming massive heterogeneous 3D geospatial datasets.
 	https://github.com/AnalyticalGraphicsInc/3d-tiles
@@ -61,6 +62,7 @@ glTF -GL Transmission Format "JPEG for 3D"
 	
 	
 Precision Problems http://blogs.agi.com/insight3d/index.php/2008/09/03/precisions-precisions/
+	glTF CESIUM_RTC
 	Large distances, floatingpoint precision-> jittering
 	the largest number that allows approximate 1 cm increments is 131,071 (217- 1)
 	
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