c# - WPF Canvas as a math graphing area -



c# - WPF Canvas as a math graphing area -

in graphic calculator, using canvas plane on graphs of functions rendered. have noticed whenever input complex functions (i utilize bezier curves that, more complex function -> more points need render graph smooth-looking) gets quite laggy , overally doesn't perform well.

which of these solutions to the lowest degree computationally costly / best approach?

1. (my current solution) using huge canvas within scrollviewer limits view area

cons have found:

the whole canvas rendered, non-visible part

starts lag when there more 50k elements on canvas

2. using canvas not big, , management of panning / zooming through transformmatrix

cons think there might (solution not tried):

won't more laggy when have redraw , recalculate dynammically?

3. other solutions?

any help appreciated.

if can avoid it, don't want using discrete visuals represent things charts/graphs; heavy, , participating in input handling , layout. recommend using wpf's drawing/geometry apis directly. suggest implementing custom command performs own rendering (see onrender). suggest implementing iscrollinfo can manage own scrolling: know viewport size , position, gives alternative of invalidating geometry when scrolling, , rebuilding only parts of graph in view. should cut down overhead significantly.

c# wpf xaml math canvas

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