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repaint map when orientation changes

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this is in preparation for writing the road labels on the right way
up
This commit is contained in:
Daniel Barlow 2025-06-11 17:37:10 +01:00
parent b3f0628948
commit 8637731c60
1 changed files with 16 additions and 8 deletions
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24
pkgs/maps/main.fnl
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@ -78,7 +78,7 @@ label.readout {
:lon 0
:zoom 17
:course 0 ; direction of travel
:orientation 0 ; map rotation angle from north
:orientation {:target 0 :actual 0} ; map rotation angle from north
:tiles {}
}
)
@ -251,7 +251,7 @@ label.readout {
(draw-onto-map-surface bounds app-state.zoom)))))
(g:translate (+ (/ viewport-width 2)) (+ (/ viewport-height 2)))
(g:rotate (* (/ (- 360 app-state.orientation) 180) math.pi))
(g:rotate (* (/ (- 360 app-state.orientation.actual) 180) math.pi))
(g:translate (- (/ viewport-width 2)) (- (/ viewport-height 2)))
(g:set_source_surface map-surface (- offset-x) (- offset-y))
@ -302,10 +302,18 @@ label.readout {
(when (not (bounds= old-bounds bounds))
(fetch-tiles bounds app-state.tiles app-state.zoom)
(set map-surface nil)))
(when (> (math.abs (- app-state.orientation app-state.course)) 20)
(set app-state.orientation
(+ app-state.orientation
(* 0.05 (- app-state.course app-state.orientation)))))
(when (> (math.abs (- app-state.orientation.target app-state.course)) 20)
(set app-state.orientation.target app-state.course)
; (-> state-widgets.rose (: :get_window) (: :invalidate_rect nil))
(set map-surface nil))
(when (not (= app-state.orientation.target app-state.orientation.actual))
(set app-state.orientation.actual
(+ app-state.orientation.actual
(* 0.05 (- app-state.orientation.target app-state.orientation.actual))))
)
(each [name widget (pairs state-widgets)]
(case name
:speed (widget:set_label
@ -341,7 +349,7 @@ label.readout {
(fn [self g]
(g:set_source_rgb 0.4 0.0 0.1)
(g:translate (// height 2) (// height 2))
(g:rotate (* (/ (- app-state.course app-state.orientation)
(g:rotate (* (/ (- app-state.course app-state.orientation.actual)
180) math.pi))
(g:translate (// height -2) (// height -2))
(g:set_line_width 4)
@ -373,7 +381,7 @@ label.readout {
(g:stroke)
(g:translate (// height 2) (// height 2))
(g:rotate (- (deg->rad app-state.orientation)))
(g:rotate (- (deg->rad app-state.orientation.actual)))
(g:translate (// height -2) (// height -2))
(g:set_line_width 2)