51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package shape
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import (
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"math"
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"oss.terrastruct.com/d2/lib/geo"
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)
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type shapeCircle struct {
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*baseShape
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}
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func NewCircle(box *geo.Box) Shape {
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return shapeCircle{
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baseShape: &baseShape{
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Type: CIRCLE_TYPE,
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Box: box,
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},
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}
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}
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func (s shapeCircle) GetInnerBox() *geo.Box {
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width := s.Box.Width
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height := s.Box.Height
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insideTL := s.GetInsidePlacement(width, height, 0)
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tl := s.Box.TopLeft.Copy()
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width -= 2 * (insideTL.X - tl.X)
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height -= 2 * (insideTL.Y - tl.Y)
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return geo.NewBox(&insideTL, width, height)
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}
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func (s shapeCircle) AspectRatio1() bool {
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return true
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}
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func (s shapeCircle) GetDimensionsToFit(width, height, paddingX, paddingY float64) (float64, float64) {
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diameter := math.Ceil(math.Sqrt(2 * math.Pow(math.Max(width+paddingX, height+paddingY), 2)))
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return diameter, diameter
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}
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func (s shapeCircle) GetInsidePlacement(width, height, padding float64) geo.Point {
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return *geo.NewPoint(s.Box.TopLeft.X+math.Ceil(s.Box.Width/2-width/2), s.Box.TopLeft.Y+math.Ceil(s.Box.Height/2-height/2))
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}
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func (s shapeCircle) Perimeter() []geo.Intersectable {
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return []geo.Intersectable{geo.NewEllipse(s.Box.Center(), s.Box.Width/2, s.Box.Height/2)}
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}
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func (s shapeCircle) GetDefaultPadding() (paddingX, paddingY float64) {
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return defaultPadding / 2, defaultPadding / 2
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}
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