65 lines
1.5 KiB
Go
65 lines
1.5 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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"oss.terrastruct.com/util-go/go2"
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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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shape := 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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shape.FullShape = go2.Pointer(Shape(shape))
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return shape
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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, 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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effectiveWidth := width + 2*paddingX
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effectiveHeight := height + 2*paddingY
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diameter := math.Ceil(math.Max(effectiveWidth, effectiveHeight))
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return diameter, diameter
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}
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func (s shapeCircle) GetInsidePlacement(width, height, paddingX, paddingY float64) geo.Point {
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centerX := s.Box.TopLeft.X + paddingX
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centerY := s.Box.TopLeft.Y + paddingY
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r := s.Box.Width / 2.
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x := centerX - r
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y := centerY - r
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return geo.Point{
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X: math.Ceil(x),
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Y: math.Ceil(y),
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}
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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 / math.Sqrt2, defaultPadding / math.Sqrt2
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}
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