BufferElement constructor
parameters used to create our BufferElement.
The name of the BufferElement.
The WGSL variable type of the BufferElement (stripped of array).
The WGSL base variable type of the BufferElement (stripped of array and atomic).
The key of the BufferElement.
BufferLayout used to fill the BufferBinding arrayBuffer at the right offsets.
Object defining exactly at which place a binding should be inserted into the BufferBinding arrayBuffer.
OptionalviewArray containing the BufferElement values.
Function assigned to set the view values.
Get the total number of rows used by this BufferElement.
Get the total number of bytes used by this BufferElement based on alignment start and end offsets.
Get the total number of bytes used by this BufferElement, including final padding.
Get the offset (i.e. byte index) at which our BufferElement starts.
Get the array offset (i.e. array index) at which our BufferElement starts.
Get the offset (i.e. byte index) at which our BufferElement ends.
Get the array offset (i.e. array index) at which our BufferElement ends.
StaticgetGet the BufferElement WGSL type.
Original type passed.
StaticgetGet the BufferElement WGSL base type.
Original type passed.
Get the position at given offset (i.e. byte index).
Byte index to use.
Get the number of bytes at a given position.
Position from which to count.
Check that a byte position does not overflow its max value (16).
Get the number of bytes between two positions.
First position.
Second position.
Compute the right alignment (i.e. start and end rows and bytes) given the size and align properties and the next available position.
next position at which we should insert this element.
position at which to start inserting the values in the BufferBinding arrayBuffer.
Set the alignment from an offset (byte count).
Offset at which to start inserting the values in the parent BufferBinding arrayBuffer.
Set this BufferElement view into a parent BufferBinding arrayBuffer.
The parent BufferBinding arrayBuffer.
The parent BufferBinding arrayView.
Set the view value from a float or an int.
Float or int to use.
Set the view value from an array.
Array to use.
Set the view value from an array with pad applied.
Array to use.
Update the view based on the new value.
New value to use.
Extract the data corresponding to this specific BufferElement from a Float32Array holding the GPUBuffer data of the parentMesh BufferBinding.
Float32Array holding GPUBuffer data.
Used to handle each buffer binding array view and data layout alignment. Compute the exact alignment offsets needed to fill an ArrayBuffer that will be sent to a GPUBuffer, based on an input type and value. Also update the view array at the correct offset.
So all our struct need to be packed into our arrayBuffer using a precise layout. They will be stored in rows, each row made of 4 slots and each slots made of 4 bytes. Depending on the binding element type, its row and slot may vary and we may have to insert empty padded values. All in all it looks like that:
slot 0 slot 1 slot 2 slot 3 row 0 | _ _ _ _ | _ _ _ _ | _ _ _ _ | _ _ _ _ | row 1 | _ _ _ _ | _ _ _ _ | _ _ _ _ | _ _ _ _ | row 2 | _ _ _ _ | _ _ _ _ | _ _ _ _ | _ _ _ _ |see https://webgpufundamentals.org/webgpu/lessons/resources/wgsl-offset-computer.html