tomo/ggfx
tomo/ggfx
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Move circle function out of example and into new file

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This commit is contained in:
Sasha Koshka 2023-07-01 11:05:20 -04:00
parent c8b022f5f1
commit cc921ddb29
2 changed files with 20 additions and 17 deletions
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21
examples/glaggle/main.go
View File

@ -1,7 +1,6 @@
package main package main
import "os" import "os"
import "math"
import "image" import "image"
import "image/png" import "image/png"
import "git.tebibyte.media/tomo/ggfx" import "git.tebibyte.media/tomo/ggfx"
@ -18,16 +17,16 @@ func main () {
yellow := []uint8 { 255, 255, 0, 255 } yellow := []uint8 { 255, 255, 0, 255 }
midpoint := image.Pt(canvas.Bounds.Dx() / 2, canvas.Bounds.Dy() / 2) midpoint := image.Pt(canvas.Bounds.Dx() / 2, canvas.Bounds.Dy() / 2)
face := circle(32, 100, midpoint) face := ggfx.Circle(32, 100, midpoint)
canvas.FillPolygon(yellow, face...) canvas.FillPolygon(yellow, face...)
canvas.StrokePolygon(black, 2, face...) canvas.StrokePolygon(black, 2, face...)
eye := circle(12, 16, midpoint.Add(image.Pt(-40, -30))) eye := ggfx.Circle(12, 16, midpoint.Add(image.Pt(-40, -30)))
canvas.FillPolygon(black, eye...) canvas.FillPolygon(black, eye...)
eye = circle(12, 16, midpoint.Add(image.Pt(40, -30))) eye = ggfx.Circle(12, 16, midpoint.Add(image.Pt(40, -30)))
canvas.FillPolygon(black, eye...) canvas.FillPolygon(black, eye...)
mouth := circle(16, 70, midpoint) mouth := ggfx.Circle(16, 70, midpoint)
canvas.StrokePolygon(black, 2, mouth[1:8]...) canvas.StrokePolygon(black, 2, mouth[1:8]...)
file, err := os.Create("TEST.png") file, err := os.Create("TEST.png")
@ -38,15 +37,3 @@ func main () {
println("Open TEST.png to see the result.") println("Open TEST.png to see the result.")
} }
func circle (resolution int, radius float64, center image.Point) []image.Point {
points := make([]image.Point, resolution)
for index := range points {
angle := float64(index) * ((2 * math.Pi) / float64(len(points)))
point := image.Pt (
int(math.Cos(angle) * radius),
int(math.Sin(angle) * radius))
points[index] = point.Add(center)
}
return points
}

16
shapes.go Normal file
View File

@ -0,0 +1,16 @@
package ggfx
import "math"
import "image"
func Circle (resolution int, radius float64, center image.Point) []image.Point {
points := make([]image.Point, resolution)
for index := range points {
angle := float64(index) * ((2 * math.Pi) / float64(len(points)))
point := image.Pt (
int(math.Cos(angle) * radius),
int(math.Sin(angle) * radius))
points[index] = point.Add(center)
}
return points
}