74 lines
1.9 KiB
Go
74 lines
1.9 KiB
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 shapeCylinder struct {
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*baseShape
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}
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func NewCylinder(box *geo.Box) Shape {
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return shapeCylinder{
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baseShape: &baseShape{
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Type: CYLINDER_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 shapeCylinder) GetInnerBox() *geo.Box {
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height := s.Box.Height
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tl := s.Box.TopLeft.Copy()
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arcDepth := 24.0
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if height < arcDepth*2 {
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arcDepth = height / 2.0
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}
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height -= 3 * arcDepth
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tl.Y += 2 * arcDepth
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return geo.NewBox(tl, s.Box.Width, height)
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}
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func cylinderOuterPath(box *geo.Box) *svg.SvgPathContext {
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arcDepth := 24.0
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if box.Height < arcDepth*2 {
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arcDepth = box.Height / 2
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}
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multiplier := 0.45
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pc := svg.NewSVGPathContext(box.TopLeft, 1, 1)
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pc.StartAt(pc.Absolute(0, arcDepth))
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pc.C(false, 0, 0, box.Width*multiplier, 0, box.Width/2, 0)
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pc.C(false, box.Width-box.Width*multiplier, 0, box.Width, 0, box.Width, arcDepth)
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pc.V(true, box.Height-arcDepth*2)
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pc.C(false, box.Width, box.Height, box.Width-box.Width*multiplier, box.Height, box.Width/2, box.Height)
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pc.C(false, box.Width*multiplier, box.Height, 0, box.Height, 0, box.Height-arcDepth)
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pc.V(true, -(box.Height - arcDepth*2))
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pc.Z()
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return pc
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}
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func cylinderInnerPath(box *geo.Box) *svg.SvgPathContext {
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arcDepth := 24.0
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if box.Height < arcDepth*2 {
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arcDepth = box.Height / 2
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}
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multiplier := 0.45
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pc := svg.NewSVGPathContext(box.TopLeft, 1, 1)
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pc.StartAt(pc.Absolute(0, arcDepth))
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pc.C(false, 0, arcDepth*2, box.Width*multiplier, arcDepth*2, box.Width/2, arcDepth*2)
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pc.C(false, box.Width-box.Width*multiplier, arcDepth*2, box.Width, arcDepth*2, box.Width, arcDepth)
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return pc
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}
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func (s shapeCylinder) Perimeter() []geo.Intersectable {
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return cylinderOuterPath(s.Box).Path
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}
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func (s shapeCylinder) GetSVGPathData() []string {
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return []string{
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cylinderOuterPath(s.Box).PathData(),
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cylinderInnerPath(s.Box).PathData(),
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}
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}
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