48 lines
911 B
Go
48 lines
911 B
Go
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package shape
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import (
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"oss.terrastruct.com/d2/lib/geo"
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"oss.terrastruct.com/d2/lib/svg"
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)
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type shapeStep struct {
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*baseShape
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}
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func NewStep(box *geo.Box) Shape {
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return shapeStep{
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baseShape: &baseShape{
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Type: STEP_TYPE,
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Box: box,
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},
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}
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}
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const STEP_WEDGE_WIDTH = 35.0
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func stepPath(box *geo.Box) *svg.SvgPathContext {
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wedgeWidth := STEP_WEDGE_WIDTH
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if box.Width <= wedgeWidth {
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wedgeWidth = box.Width / 2.0
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}
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pc := svg.NewSVGPathContext(box.TopLeft, 1, 1)
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pc.StartAt(pc.Absolute(0, 0))
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pc.L(false, box.Width-wedgeWidth, 0)
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pc.L(false, box.Width, box.Height/2)
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pc.L(false, box.Width-wedgeWidth, box.Height)
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pc.L(false, 0, box.Height)
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pc.L(false, wedgeWidth, box.Height/2)
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pc.Z()
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return pc
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}
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func (s shapeStep) Perimeter() []geo.Intersectable {
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return stepPath(s.Box).Path
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}
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func (s shapeStep) GetSVGPathData() []string {
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return []string{
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stepPath(s.Box).PathData(),
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}
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}
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