public OVRGLTFAccessor(JSONNode node, JSONNode root, bool bufferViewOnly = false)
{
JSONNode jsonBufferView = node;
if (!bufferViewOnly)
{
additionalOffset = node["byteOffset"].AsInt;
dataType = ToOVRType(node["type"].Value);
componentType = (OVRGLTFComponentType)node["componentType"].AsInt;
dataCount = node["count"].AsInt;
int bufferViewId = node["bufferView"].AsInt;
jsonBufferView = root["bufferViews"][bufferViewId];
}
int bufferId = jsonBufferView["buffer"].AsInt;
byteOffset = jsonBufferView["byteOffset"].AsInt;
byteLength = jsonBufferView["byteLength"].AsInt;
byteStride = jsonBufferView["byteStride"].AsInt;
var jsonBuffer = root["buffers"][bufferId];
bufferLength = jsonBuffer["byteLength"].AsInt;
}
private float GetMaxValueForType(OVRGLTFComponentType type)
{
switch (type)
{
case OVRGLTFComponentType.BYTE:
return(sbyte.MaxValue);
case OVRGLTFComponentType.UNSIGNED_BYTE:
return(byte.MaxValue);
case OVRGLTFComponentType.SHORT:
return(short.MaxValue);
case OVRGLTFComponentType.UNSIGNED_SHORT:
return(ushort.MaxValue);
case OVRGLTFComponentType.UNSIGNED_INT:
return(uint.MaxValue);
case OVRGLTFComponentType.FLOAT:
return(float.MaxValue);
default:
return(0);
}
}
private int GetStrideForType(OVRGLTFComponentType type)
{
switch (type)
{
case OVRGLTFComponentType.BYTE:
return(sizeof(sbyte));
case OVRGLTFComponentType.UNSIGNED_BYTE:
return(sizeof(byte));
case OVRGLTFComponentType.SHORT:
return(sizeof(short));
case OVRGLTFComponentType.UNSIGNED_SHORT:
return(sizeof(ushort));
case OVRGLTFComponentType.UNSIGNED_INT:
return(sizeof(uint));
case OVRGLTFComponentType.FLOAT:
return(sizeof(float));
default:
return(0);
}
}
private uint ReadElementAsUint(byte[] data, int index, OVRGLTFComponentType type)
{
switch (type)
{
case OVRGLTFComponentType.BYTE:
return((uint)Convert.ToSByte(data[index]));
case OVRGLTFComponentType.UNSIGNED_BYTE:
return(data[index]);
case OVRGLTFComponentType.SHORT:
return((uint)BitConverter.ToInt16(data, index));
case OVRGLTFComponentType.UNSIGNED_SHORT:
return(BitConverter.ToUInt16(data, index));
case OVRGLTFComponentType.UNSIGNED_INT:
return(BitConverter.ToUInt32(data, index));
default:
Debug.Log(String.Format("Failed to read Component Type {0} as a uint.", type));
return(0);
}
}
