Plasma effect: Difference between revisions
Added Wren
(Add Rust implementation) |
(Added Wren) |
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plasma.save_as('plasma.png')</lang>
Output image: [https://github.com/trizen/rc/blob/master/img/plasma-effect-sidef.png Plasma effect]
=={{header|Wren}}==
{{trans|Kotlin}}
{{libheader|DOME}}
<lang ecmascript>import "graphics" for Canvas, Color, ImageData
import "dome" for Window
import "math" for Math
class PlasmaEffect {
construct new(width, height) {
Window.title = "Plasma Effect"
Window.resize(width, height)
Canvas.resize(width, height)
_w = width
_h = height
_bmp = ImageData.create("plasma_effect", _w, _h)
_plasma = createPlasma() // stores the hues for the colors
}
init() {
_frame = 0
_hueShift = 0
Canvas.cls(Color.white)
}
createPlasma() {
var buffer = List.filled(_w, null)
for (x in 0..._w) {
buffer[x] = List.filled(_h, 0)
for (y in 0..._h) {
var value = Math.sin(x / 16)
value = value + Math.sin(y / 8)
value = value + Math.sin((x + y) / 16)
value = value + Math.sin((x * x + y * y).sqrt / 8)
value = value + 4 // shift range from -4 .. 4 to 0 .. 8
value = value / 8 // bring range down to 0 .. 1
if (value < 0 || value > 1) Fiber.abort("Hue value out of bounds")
buffer[x][y] = value
pset(x, y, Color.hsv(value * 360, 1, 1))
}
}
return buffer
}
pset(x, y, col) { _bmp.pset(x, y, col) }
pget(x, y) { _bmp.pget(x, y) }
update() {
_frame = _frame + 1
if (_frame % 3 == 0) { // update every 3 frames or 1/20th second
_hueShift = (_hueShift + 0.02) % 1
}
}
draw(alpha) {
for (x in 0..._w) {
for (y in 0..._h) {
var hue = (_hueShift + _plasma[x][y]) % 1
var col = Color.hsv(hue * 360, 1, 1)
pset(x, y, col)
}
}
_bmp.draw(0, 0)
}
}
var Game = PlasmaEffect.new(640, 640)</lang>
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