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vector: Improve the quality of QuadTo and CubicTo

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Updates #844
This commit is contained in:
Hajime Hoshi 2021-07-16 16:58:20 +09:00
parent 01d6fd3c72
commit e24eecd4a6
1 changed files with 8 additions and 2 deletions
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10
vector/path.go
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@ -50,6 +50,9 @@ func (p *Path) LineTo(x, y float32) {
}
// QuadTo adds a quadratic Bézier curve to the path.
// (x1, y1) is the control point, and (x2, y2) is the destination.
//
// QuadTo updates the current position to (x2, y2).
func (p *Path) QuadTo(x1, y1, x2, y2 float32) {
p.quadTo(x1, y1, x2, y2, 0)
}
@ -73,7 +76,7 @@ func (p *Path) quadTo(x1, y1, x2, y2 float32, level int) {
x0 := p.cur.x
y0 := p.cur.y
if isPointCloseToSegment(x1, y1, x0, y0, x2, y2, 1) {
if isPointCloseToSegment(x1, y1, x0, y0, x2, y2, 0.5) {
p.LineTo(x2, y2)
return
}
@ -89,6 +92,9 @@ func (p *Path) quadTo(x1, y1, x2, y2 float32, level int) {
}
// CubicTo adds a cubic Bézier curve to the path.
// (x1, y1) and (x2, y2) are the control points, and (x3, y3) is the destination.
//
// CubicTo updates the current position to (x3, y3).
func (p *Path) CubicTo(x1, y1, x2, y2, x3, y3 float32) {
p.cubicTo(x1, y1, x2, y2, x3, y3, 0)
}
@ -100,7 +106,7 @@ func (p *Path) cubicTo(x1, y1, x2, y2, x3, y3 float32, level int) {
x0 := p.cur.x
y0 := p.cur.y
if isPointCloseToSegment(x1, y1, x0, y0, x3, y3, 1) && isPointCloseToSegment(x2, y2, x0, y0, x3, y3, 1) {
if isPointCloseToSegment(x1, y1, x0, y0, x3, y3, 0.5) && isPointCloseToSegment(x2, y2, x0, y0, x3, y3, 0.5) {
p.LineTo(x3, y3)
return
}