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charts: update some comments

char-rename
Alexander Iljin 2017-01-07 01:36:30 +03:00 committed by John Benediktsson
parent 4b416f1a5a
commit fecae1bda6
1 changed files with 2 additions and 2 deletions
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@ -7,13 +7,13 @@ TUPLE: chart < gadget ;
M: chart pref-dim* drop { 300 300 } ;
! Return the bottom-left and top-right corners of the visible area.
! Return the x and y ranges of the visible area.
: chart-axes ( chart -- seq )
drop { { 0 300 } { 0 300 } } ;
! There are several things to do to present data on the screen.
! Map the data coordinates to the screen coordinates.
! Cut off data outside the presentation window.
! Cut off data outside the presentation window. When cutting off vertically, split the line into segments and add new points if necessary. Return an array of line segments.
! Remove redundant points from the drawing pass.
! chart new line new COLOR: blue >>color { { 0 100 } { 100 0 } { 100 50 } { 150 50 } { 200 100 } } >>data add-gadget gadget.