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added safer lower limit for circle steps

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This commit is contained in:
Thomas Friedel 2018-02-06 17:06:59 +01:00
parent 5e6a33f77e
commit 9c1845211a
1 changed files with 5 additions and 1 deletions
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6
paths.go
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@ -94,6 +94,8 @@ func (cv *Canvas) Arc(x, y, radius, startAngle, endAngle float32, anticlockwise
step := 6 / fmath.Max(tr[0], tr[1]) step := 6 / fmath.Max(tr[0], tr[1])
if step > 0.8 { if step > 0.8 {
step = 0.8 step = 0.8
} else if step < 0.01 {
step = 0.01
} }
if anticlockwise { if anticlockwise {
for a := startAngle; a > endAngle; a -= step { for a := startAngle; a > endAngle; a -= step {
@ -307,8 +309,10 @@ func (cv *Canvas) addCircleTris(p lm.Vec2, radius float32, tris []float32) []flo
cxf, cyf := cv.vecToGL(p) cxf, cyf := cv.vecToGL(p)
p0x, p0y := cv.vecToGL(lm.Vec2{p[0], p[1] + radius}) p0x, p0y := cv.vecToGL(lm.Vec2{p[0], p[1] + radius})
step := 6 / radius step := 6 / radius
if step > 0. { if step > 0.8 {
step = 0.8 step = 0.8
} else if step < 0.01 {
step = 0.01
} }
for angle := step; angle <= math.Pi*2+step; angle += step { for angle := step; angle <= math.Pi*2+step; angle += step {
s, c := fmath.Sincos(angle) s, c := fmath.Sincos(angle)