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Make blur example shorter.

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treeform 2020-12-04 09:32:38 -08:00
parent 7c4615282a
commit d1adfba46e
4 changed files with 21 additions and 34 deletions
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20
README.md
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@ -20,26 +20,12 @@ This library is being actively developed and is not yet ready for use. Since you
### examples/blur.nim ### examples/blur.nim
```nim ```nim
var trees = readImage("examples/data/trees.png")
var blur = trees.copy()
blur.blur(10)
var p = newPath() var p = newPath()
let p.polygon(100, 100, 70, sides=6)
size = 80.0
x = 100.0
y = 100.0
p.moveTo(x + size * cos(0.0), y + size * sin(0.0))
for side in 0 ..< 7:
p.lineTo(
x + size * cos(side.float32 * 2.0 * PI / 6.0),
y + size * sin(side.float32 * 2.0 * PI / 6.0)
)
p.closePath() p.closePath()
var mask = newImage(200, 200) var mask = newImage(200, 200)
mask.fillPath(p, rgba(255, 0, 0, 255)) mask.fillPath(p, rgba(255, 255, 255, 255))
mask.sharpOpacity() blur.blur(10)
blur.draw(mask, blendMode = bmMask) blur.draw(mask, blendMode = bmMask)
image.draw(trees) image.draw(trees)
image.draw(blur) image.draw(blur)

22
examples/blur.nim
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@ -1,28 +1,16 @@
import pixie, chroma, vmath import pixie, chroma, vmath
var image = newImage(200, 200)
image.fill(rgba(255, 255, 255, 255))
var trees = readImage("examples/data/trees.png") var trees = readImage("examples/data/trees.png")
var blur = trees.copy() var blur = trees.copy()
blur.blur(10) var image = newImage(200, 200)
image.fill(rgba(255, 255, 255, 255))
var p = newPath() var p = newPath()
let p.polygon(100, 100, 70, sides=6)
size = 80.0
x = 100.0
y = 100.0
p.moveTo(x + size * cos(0.0), y + size * sin(0.0))
for side in 0 ..< 7:
p.lineTo(
x + size * cos(side.float32 * 2.0 * PI / 6.0),
y + size * sin(side.float32 * 2.0 * PI / 6.0)
)
p.closePath() p.closePath()
var mask = newImage(200, 200) var mask = newImage(200, 200)
mask.fillPath(p, rgba(255, 0, 0, 255)) mask.fillPath(p, rgba(255, 255, 255, 255))
mask.sharpOpacity() blur.blur(10)
blur.draw(mask, blendMode = bmMask) blur.draw(mask, blendMode = bmMask)
image.draw(trees) image.draw(trees)
image.draw(blur) image.draw(blur)

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examples/blur.png
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13
src/pixie/paths.nim
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@ -899,3 +899,16 @@ proc rect*(path: Path, x, y, w, h: float32) =
path.lineTo(x, y+h) path.lineTo(x, y+h)
path.lineTo(x, y) path.lineTo(x, y)
path.closePath() path.closePath()
proc polygon*(path: Path, x, y, size: float32, sides: int) =
## Draws a n sided regular polygon at x,y with size.
let
size = 80.0
x = 100.0
y = 100.0
path.moveTo(x + size * cos(0.0), y + size * sin(0.0))
for side in 0 .. sides:
path.lineTo(
x + size * cos(side.float32 * 2.0 * PI / sides.float32),
y + size * sin(side.float32 * 2.0 * PI / sides.float32)
)