36 lines
1.2 KiB
Standard ML
36 lines
1.2 KiB
Standard ML
|
structure PipeCursor =
|
||
|
|
struct
|
||
|
|
fun xToNdc (xOffset, xpos, scale, halfWidth) =
|
||
|
|
((xpos * scale + xOffset) - halfWidth) / halfWidth
|
||
|
|
|
||
|
|
fun yToNdc (yOffset, ypos, scale, halfHeight) =
|
||
|
|
~(((ypos * scale + yOffset) - halfHeight) / halfHeight)
|
||
|
|
|
||
|
|
fun lerp (xOffset: Real32.real, yOffset, scale, windowWidth, windowHeight, r, g, b) =
|
||
|
|
let
|
||
|
|
val halfWidth = windowWidth / 2.0
|
||
|
|
val halfHeight = windowHeight / 2.0
|
||
|
|
in
|
||
|
|
#[
|
||
|
|
xToNdc (xOffset, 0.000000000000000, scale, halfWidth),
|
||
|
|
yToNdc (yOffset, 13.000000000000000, scale, halfHeight),
|
||
|
|
r, g, b,
|
||
|
|
xToNdc (xOffset, 1.000000000000000, scale, halfWidth),
|
||
|
|
yToNdc (yOffset, 13.000000000000000, scale, halfHeight),
|
||
|
|
r, g, b,
|
||
|
|
xToNdc (xOffset, 0.000000000000000, scale, halfWidth),
|
||
|
|
yToNdc (yOffset, 0.000000000000000, scale, halfHeight),
|
||
|
|
r, g, b,
|
||
|
|
xToNdc (xOffset, 0.000000000000000, scale, halfWidth),
|
||
|
|
yToNdc (yOffset, 0.000000000000000, scale, halfHeight),
|
||
|
|
r, g, b,
|
||
|
|
xToNdc (xOffset, 1.000000000000000, scale, halfWidth),
|
||
|
|
yToNdc (yOffset, 13.000000000000000, scale, halfHeight),
|
||
|
|
r, g, b,
|
||
|
|
xToNdc (xOffset, 1.000000000000000, scale, halfWidth),
|
||
|
|
yToNdc (yOffset, 0.000000000000000, scale, halfHeight),
|
||
|
|
r, g, b
|
||
|
|
]
|
||
|
|
end
|
||
|
|
end
|