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add function which generates a drawable vector given a mouse position

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This commit is contained in:
Humza Shahid
2024-07-30 19:30:59 +01:00
parent b8ab605c90
commit b1b929e055
3 changed files with 23 additions and 18 deletions
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35
functional-core/app-update.sml
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@@ -23,7 +23,7 @@ struct
]
local
fun getVerticalClickPos (idx, horizontalPos, mouseX, mouseY) =
fun getVerticalClickPos (idx, horizontalPos, mouseX, mouseY, r, g, b) =
if idx = Vector.length clickPoints then
#[]
else
@@ -31,27 +31,27 @@ struct
val curVerticalPos = Vector.sub (clickPoints, idx)
in
if mouseY < curVerticalPos - 10 orelse mouseY > curVerticalPos + 10 then
getVerticalClickPos (idx + 1, horizontalPos, mouseX, mouseY)
getVerticalClickPos
(idx + 1, horizontalPos, mouseX, mouseY, r, g, b)
else
let
val left = Real32.fromInt ((horizontalPos - 10) div 500)
val right = Real32.fromInt ((horizontalPos + 10) div 500)
val bottom = Real32.fromInt ((curVerticalPos - 10) div 500)
val top = Real32.fromInt ((curVerticalPos + 10) div 500)
val left = Real32.fromInt (horizontalPos - 10) / 500.0
val right = Real32.fromInt (horizontalPos + 10) / 500.0
val bottom = Real32.fromInt (curVerticalPos - 10) / 500.0
val top = Real32.fromInt (curVerticalPos + 10) / 500.0
in
val highlightSquare = #[
left, bottom, (* lower left *)
right, bottom, (* lower right *)
left, top, (* upper left *)
#[ left, bottom, r, g, b,
right, bottom, r, g, b,
left, top, r, g, b,
left, top, (* upper left *)
right, bottom, (* lower right *)
right, top (* upper right *)
left, top, r, g, b,
right, bottom, r, g, b,
right, top, r, g, b
]
end
end
fun getHorizontalClickPos (idx, mouseX, mouseY) =
fun getHorizontalClickPos (idx, mouseX, mouseY, r, g, b) =
if idx = Vector.length clickPoints then
#[]
else
@@ -59,9 +59,9 @@ struct
val curPos = Vector.sub (clickPoints, idx)
in
if mouseX < curPos - 10 orelse mouseX > curPos + 10 then
getHorizontalClickPos (idx + 1, mouseX, mouseY)
getHorizontalClickPos (idx + 1, mouseX, mouseY, r, g, b)
else
getVerticalClickPos (0, curPos, mouseX, mouseY)
getVerticalClickPos (0, curPos, mouseX, mouseY, r, g, b)
end
in
(*
@@ -70,6 +70,7 @@ struct
* If a square wasn't found at the clicked position,
* an empty vector is returned.
*)
fun getClickPos (mouseX, mouseY) = getHorizontalClickPos (0, mouseX, mouseY)
fun getClickPos (mouseX, mouseY, r, g, b) =
getHorizontalClickPos (0, mouseX, mouseY, r, g, b)
end
end