updates
This commit is contained in:
parent
51f3cca5d7
commit
5936b89e89
6 changed files with 266 additions and 139 deletions
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@ -32,11 +32,17 @@ func drawChart(res http.ResponseWriter, req *http.Request) {
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tbc := tb.Corners().Rotate(45)
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tbc := tb.Corners().Rotate(45)
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chart.Draw.BoxCorners(r, tbc, chart.Style{
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chart.Draw.Box2d(r, tbc, chart.Style{
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StrokeColor: drawing.ColorRed,
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StrokeColor: drawing.ColorRed,
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StrokeWidth: 2,
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StrokeWidth: 2,
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})
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})
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tbc2 := tbc.Shift(tbc.Height(), 0)
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chart.Draw.Box2d(r, tbc2, chart.Style{
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StrokeColor: drawing.ColorGreen,
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StrokeWidth: 2,
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})
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tbcb := tbc.Box()
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tbcb := tbc.Box()
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chart.Draw.Box(r, tbcb, chart.Style{
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chart.Draw.Box(r, tbcb, chart.Style{
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StrokeColor: drawing.ColorBlue,
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StrokeColor: drawing.ColorBlue,
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109
box.go
109
box.go
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@ -2,7 +2,6 @@ package chart
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import (
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import (
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"fmt"
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"fmt"
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"math"
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util "github.com/wcharczuk/go-chart/util"
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util "github.com/wcharczuk/go-chart/util"
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)
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)
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@ -166,12 +165,12 @@ func (b Box) Shift(x, y int) Box {
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}
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}
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// Corners returns the box as a set of corners.
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// Corners returns the box as a set of corners.
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func (b Box) Corners() BoxCorners {
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func (b Box) Corners() Box2d {
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return BoxCorners{
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return Box2d{
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TopLeft: Point{b.Left, b.Top},
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TopLeft: Point{float64(b.Left), float64(b.Top)},
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TopRight: Point{b.Right, b.Top},
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TopRight: Point{float64(b.Right), float64(b.Top)},
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BottomRight: Point{b.Right, b.Bottom},
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BottomRight: Point{float64(b.Right), float64(b.Bottom)},
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BottomLeft: Point{b.Left, b.Bottom},
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BottomLeft: Point{float64(b.Left), float64(b.Bottom)},
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}
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}
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}
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}
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@ -255,99 +254,3 @@ func (b Box) OuterConstrain(bounds, other Box) Box {
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}
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}
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return newBox
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return newBox
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}
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}
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// BoxCorners is a box with independent corners.
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type BoxCorners struct {
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TopLeft, TopRight, BottomRight, BottomLeft Point
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}
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// Box return the BoxCorners as a regular box.
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func (bc BoxCorners) Box() Box {
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return Box{
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Top: util.Math.MinInt(bc.TopLeft.Y, bc.TopRight.Y),
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Left: util.Math.MinInt(bc.TopLeft.X, bc.BottomLeft.X),
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Right: util.Math.MaxInt(bc.TopRight.X, bc.BottomRight.X),
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Bottom: util.Math.MaxInt(bc.BottomLeft.Y, bc.BottomRight.Y),
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}
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}
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// Width returns the width
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func (bc BoxCorners) Width() int {
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minLeft := util.Math.MinInt(bc.TopLeft.X, bc.BottomLeft.X)
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maxRight := util.Math.MaxInt(bc.TopRight.X, bc.BottomRight.X)
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return maxRight - minLeft
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}
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// Height returns the height
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func (bc BoxCorners) Height() int {
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minTop := util.Math.MinInt(bc.TopLeft.Y, bc.TopRight.Y)
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maxBottom := util.Math.MaxInt(bc.BottomLeft.Y, bc.BottomRight.Y)
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return maxBottom - minTop
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}
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// Center returns the center of the box
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func (bc BoxCorners) Center() (x, y int) {
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left := util.Math.MeanInt(bc.TopLeft.X, bc.BottomLeft.X)
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right := util.Math.MeanInt(bc.TopRight.X, bc.BottomRight.X)
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x = ((right - left) >> 1) + left
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top := util.Math.MeanInt(bc.TopLeft.Y, bc.TopRight.Y)
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bottom := util.Math.MeanInt(bc.BottomLeft.Y, bc.BottomRight.Y)
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y = ((bottom - top) >> 1) + top
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return
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}
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// Rotate rotates the box.
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func (bc BoxCorners) Rotate(thetaDegrees float64) BoxCorners {
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cx, cy := bc.Center()
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thetaRadians := util.Math.DegreesToRadians(thetaDegrees)
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tlx, tly := util.Math.RotateCoordinate(cx, cy, bc.TopLeft.X, bc.TopLeft.Y, thetaRadians)
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trx, try := util.Math.RotateCoordinate(cx, cy, bc.TopRight.X, bc.TopRight.Y, thetaRadians)
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brx, bry := util.Math.RotateCoordinate(cx, cy, bc.BottomRight.X, bc.BottomRight.Y, thetaRadians)
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blx, bly := util.Math.RotateCoordinate(cx, cy, bc.BottomLeft.X, bc.BottomLeft.Y, thetaRadians)
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return BoxCorners{
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TopLeft: Point{tlx, tly},
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TopRight: Point{trx, try},
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BottomRight: Point{brx, bry},
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BottomLeft: Point{blx, bly},
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}
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}
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// Equals returns if the box equals another box.
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func (bc BoxCorners) Equals(other BoxCorners) bool {
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return bc.TopLeft.Equals(other.TopLeft) &&
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bc.TopRight.Equals(other.TopRight) &&
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bc.BottomRight.Equals(other.BottomRight) &&
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bc.BottomLeft.Equals(other.BottomLeft)
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}
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func (bc BoxCorners) String() string {
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return fmt.Sprintf("BoxC{%s,%s,%s,%s}", bc.TopLeft.String(), bc.TopRight.String(), bc.BottomRight.String(), bc.BottomLeft.String())
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}
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// Point is an X,Y pair
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type Point struct {
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X, Y int
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}
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// DistanceTo calculates the distance to another point.
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func (p Point) DistanceTo(other Point) float64 {
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dx := math.Pow(float64(p.X-other.X), 2)
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dy := math.Pow(float64(p.Y-other.Y), 2)
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return math.Pow(dx+dy, 0.5)
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}
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// Equals returns if a point equals another point.
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func (p Point) Equals(other Point) bool {
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return p.X == other.X && p.Y == other.Y
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}
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// String returns a string representation of the point.
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func (p Point) String() string {
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return fmt.Sprintf("P{%d,%d}", p.X, p.Y)
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}
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181
box_2d.go
Normal file
181
box_2d.go
Normal file
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@ -0,0 +1,181 @@
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package chart
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import (
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"fmt"
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"math"
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util "github.com/wcharczuk/go-chart/util"
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)
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// Box2d is a box with (4) independent corners.
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// It is used when dealing with ~rotated~ boxes.
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type Box2d struct {
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TopLeft, TopRight, BottomRight, BottomLeft Point
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}
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// Points returns the constituent points of the box.
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func (bc Box2d) Points() []Point {
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return []Point{
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bc.TopRight,
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bc.BottomRight,
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bc.BottomLeft,
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bc.TopLeft,
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}
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}
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// Box return the Box2d as a regular box.
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func (bc Box2d) Box() Box {
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return Box{
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Top: int(math.Min(bc.TopLeft.Y, bc.TopRight.Y)),
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Left: int(math.Min(bc.TopLeft.X, bc.BottomLeft.X)),
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Right: int(math.Max(bc.TopRight.X, bc.BottomRight.X)),
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Bottom: int(math.Max(bc.BottomLeft.Y, bc.BottomRight.Y)),
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}
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}
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// Width returns the width
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func (bc Box2d) Width() float64 {
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minLeft := math.Min(bc.TopLeft.X, bc.BottomLeft.X)
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maxRight := math.Max(bc.TopRight.X, bc.BottomRight.X)
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return maxRight - minLeft
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}
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// Height returns the height
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func (bc Box2d) Height() float64 {
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minTop := math.Min(bc.TopLeft.Y, bc.TopRight.Y)
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maxBottom := math.Max(bc.BottomLeft.Y, bc.BottomRight.Y)
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return maxBottom - minTop
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}
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// Center returns the center of the box
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func (bc Box2d) Center() (x, y float64) {
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left := util.Math.Mean(bc.TopLeft.X, bc.BottomLeft.X)
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right := util.Math.Mean(bc.TopRight.X, bc.BottomRight.X)
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x = ((right - left) / 2.0) + left
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top := util.Math.Mean(bc.TopLeft.Y, bc.TopRight.Y)
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bottom := util.Math.Mean(bc.BottomLeft.Y, bc.BottomRight.Y)
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y = ((bottom - top) / 2.0) + top
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return
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}
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// Rotate rotates the box.
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func (bc Box2d) Rotate(thetaDegrees float64) Box2d {
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cx, cy := bc.Center()
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thetaRadians := util.Math.DegreesToRadians(thetaDegrees)
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tlx, tly := util.Math.RotateCoordinate(int(cx), int(cy), int(bc.TopLeft.X), int(bc.TopLeft.Y), thetaRadians)
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trx, try := util.Math.RotateCoordinate(int(cx), int(cy), int(bc.TopRight.X), int(bc.TopRight.Y), thetaRadians)
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brx, bry := util.Math.RotateCoordinate(int(cx), int(cy), int(bc.BottomRight.X), int(bc.BottomRight.Y), thetaRadians)
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blx, bly := util.Math.RotateCoordinate(int(cx), int(cy), int(bc.BottomLeft.X), int(bc.BottomLeft.Y), thetaRadians)
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return Box2d{
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TopLeft: Point{float64(tlx), float64(tly)},
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TopRight: Point{float64(trx), float64(try)},
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BottomRight: Point{float64(brx), float64(bry)},
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BottomLeft: Point{float64(blx), float64(bly)},
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}
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}
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// Shift shifts a box by a given x and y value.
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func (bc Box2d) Shift(x, y float64) Box2d {
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return Box2d{
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TopLeft: bc.TopLeft.Shift(x, y),
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TopRight: bc.TopRight.Shift(x, y),
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BottomRight: bc.BottomRight.Shift(x, y),
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BottomLeft: bc.BottomLeft.Shift(x, y),
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}
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}
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// Equals returns if the box equals another box.
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func (bc Box2d) Equals(other Box2d) bool {
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return bc.TopLeft.Equals(other.TopLeft) &&
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bc.TopRight.Equals(other.TopRight) &&
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bc.BottomRight.Equals(other.BottomRight) &&
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bc.BottomLeft.Equals(other.BottomLeft)
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}
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// Overlaps returns if two boxes overlap.
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func (bc Box2d) Overlaps(other Box2d) bool {
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for _, polygon := range []Box2d{bc, other} {
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points := polygon.Points()
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for i1 := 0; i1 < len(points); i1++ {
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i2 := (i1 + 1) % len(points)
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p1 := polygon.Points()[i1]
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p2 := polygon.Points()[i2]
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normal := Point{X: p2.Y - p1.Y, Y: p1.X - p2.X}
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minA := math.MaxFloat64
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maxA := -math.MaxFloat64
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for _, p := range bc.Points() {
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projected := normal.X*p.X + normal.Y*p.Y
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if projected < minA {
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minA = projected
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}
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if projected > maxA {
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maxA = projected
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}
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}
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minB := math.MaxFloat64
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maxB := -math.MaxFloat64
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for _, p := range other.Points() {
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projected := normal.X*p.X + normal.Y*p.Y
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if projected < minB {
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minB = projected
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}
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if projected > maxB {
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maxB = projected
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}
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}
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if maxA < minB || maxB < minA {
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return false
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}
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}
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}
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return true
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}
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func (bc Box2d) String() string {
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return fmt.Sprintf("BoxC{%s,%s,%s,%s}", bc.TopLeft.String(), bc.TopRight.String(), bc.BottomRight.String(), bc.BottomLeft.String())
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}
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// Point is an X,Y pair
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type Point struct {
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X, Y float64
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}
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// Shift shifts a point.
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func (p Point) Shift(x, y float64) Point {
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return Point{
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X: p.X + x,
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Y: p.Y + y,
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}
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}
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// DistanceTo calculates the distance to another point.
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func (p Point) DistanceTo(other Point) float64 {
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dx := math.Pow(float64(p.X-other.X), 2)
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dy := math.Pow(float64(p.Y-other.Y), 2)
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return math.Pow(dx+dy, 0.5)
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}
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// Equals returns if a point equals another point.
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func (p Point) Equals(other Point) bool {
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return p.X == other.X && p.Y == other.Y
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}
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// String returns a string representation of the point.
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func (p Point) String() string {
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return fmt.Sprintf("P{%.2f,%.2f}", p.X, p.Y)
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}
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66
box_2d_test.go
Normal file
66
box_2d_test.go
Normal file
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@ -0,0 +1,66 @@
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package chart
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import (
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"fmt"
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"testing"
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assert "github.com/blendlabs/go-assert"
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)
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func TestBox2dCenter(t *testing.T) {
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assert := assert.New(t)
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bc := Box2d{
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TopLeft: Point{5, 5},
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TopRight: Point{15, 5},
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BottomRight: Point{15, 15},
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BottomLeft: Point{5, 15},
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}
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cx, cy := bc.Center()
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assert.Equal(10, cx)
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assert.Equal(10, cy)
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}
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func TestBox2dRotate(t *testing.T) {
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assert := assert.New(t)
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bc := Box2d{
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TopLeft: Point{5, 5},
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TopRight: Point{15, 5},
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BottomRight: Point{15, 15},
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BottomLeft: Point{5, 15},
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}
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rotated := bc.Rotate(45)
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assert.True(rotated.TopLeft.Equals(Point{10, 3}), rotated.String())
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}
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func TestBox2dOverlaps(t *testing.T) {
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assert := assert.New(t)
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bc := Box2d{
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TopLeft: Point{5, 5},
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TopRight: Point{15, 5},
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||||||
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BottomRight: Point{15, 15},
|
||||||
|
BottomLeft: Point{5, 15},
|
||||||
|
}
|
||||||
|
|
||||||
|
// shift meaningfully the full width of bc right.
|
||||||
|
bc2 := bc.Shift(bc.Width()+1, 0)
|
||||||
|
assert.False(bc.Overlaps(bc2), fmt.Sprintf("%v\n\t\tshould not overlap\n\t%v", bc, bc2))
|
||||||
|
|
||||||
|
// shift meaningfully the full height of bc down.
|
||||||
|
bc3 := bc.Shift(0, bc.Height()+1)
|
||||||
|
assert.False(bc.Overlaps(bc3), fmt.Sprintf("%v\n\t\tshould not overlap\n\t%v", bc, bc3))
|
||||||
|
|
||||||
|
bc4 := bc.Shift(5, 0)
|
||||||
|
assert.True(bc.Overlaps(bc4))
|
||||||
|
|
||||||
|
bc5 := bc.Shift(0, 5)
|
||||||
|
assert.True(bc.Overlaps(bc5))
|
||||||
|
|
||||||
|
bcr := bc.Rotate(45)
|
||||||
|
bcr2 := bc.Rotate(45).Shift(bc.Height(), 0)
|
||||||
|
assert.False(bcr.Overlaps(bcr2), fmt.Sprintf("%v\n\t\tshould not overlap\n\t%v", bcr, bcr2))
|
||||||
|
}
|
29
box_test.go
29
box_test.go
|
@ -157,32 +157,3 @@ func TestBoxCenter(t *testing.T) {
|
||||||
assert.Equal(15, cx)
|
assert.Equal(15, cx)
|
||||||
assert.Equal(20, cy)
|
assert.Equal(20, cy)
|
||||||
}
|
}
|
||||||
|
|
||||||
func TestBoxCornersCenter(t *testing.T) {
|
|
||||||
assert := assert.New(t)
|
|
||||||
|
|
||||||
bc := BoxCorners{
|
|
||||||
TopLeft: Point{5, 5},
|
|
||||||
TopRight: Point{15, 5},
|
|
||||||
BottomRight: Point{15, 15},
|
|
||||||
BottomLeft: Point{5, 15},
|
|
||||||
}
|
|
||||||
|
|
||||||
cx, cy := bc.Center()
|
|
||||||
assert.Equal(10, cx)
|
|
||||||
assert.Equal(10, cy)
|
|
||||||
}
|
|
||||||
|
|
||||||
func TestBoxCornersRotate(t *testing.T) {
|
|
||||||
assert := assert.New(t)
|
|
||||||
|
|
||||||
bc := BoxCorners{
|
|
||||||
TopLeft: Point{5, 5},
|
|
||||||
TopRight: Point{15, 5},
|
|
||||||
BottomRight: Point{15, 15},
|
|
||||||
BottomLeft: Point{5, 15},
|
|
||||||
}
|
|
||||||
|
|
||||||
rotated := bc.Rotate(45)
|
|
||||||
assert.True(rotated.TopLeft.Equals(Point{10, 3}), rotated.String())
|
|
||||||
}
|
|
||||||
|
|
12
draw.go
12
draw.go
|
@ -314,17 +314,17 @@ func (d draw) Box(r Renderer, b Box, s Style) {
|
||||||
}
|
}
|
||||||
|
|
||||||
func (d draw) BoxRotated(r Renderer, b Box, thetaDegrees float64, s Style) {
|
func (d draw) BoxRotated(r Renderer, b Box, thetaDegrees float64, s Style) {
|
||||||
d.BoxCorners(r, b.Corners().Rotate(thetaDegrees), s)
|
d.Box2d(r, b.Corners().Rotate(thetaDegrees), s)
|
||||||
}
|
}
|
||||||
|
|
||||||
func (d draw) BoxCorners(r Renderer, bc BoxCorners, s Style) {
|
func (d draw) Box2d(r Renderer, bc Box2d, s Style) {
|
||||||
s.GetFillAndStrokeOptions().WriteToRenderer(r)
|
s.GetFillAndStrokeOptions().WriteToRenderer(r)
|
||||||
defer r.ResetStyle()
|
defer r.ResetStyle()
|
||||||
|
|
||||||
r.MoveTo(bc.TopLeft.X, bc.TopLeft.Y)
|
r.MoveTo(int(bc.TopLeft.X), int(bc.TopLeft.Y))
|
||||||
r.LineTo(bc.TopRight.X, bc.TopRight.Y)
|
r.LineTo(int(bc.TopRight.X), int(bc.TopRight.Y))
|
||||||
r.LineTo(bc.BottomRight.X, bc.BottomRight.Y)
|
r.LineTo(int(bc.BottomRight.X), int(bc.BottomRight.Y))
|
||||||
r.LineTo(bc.BottomLeft.X, bc.BottomLeft.Y)
|
r.LineTo(int(bc.BottomLeft.X), int(bc.BottomLeft.Y))
|
||||||
r.Close()
|
r.Close()
|
||||||
r.FillStroke()
|
r.FillStroke()
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in a new issue