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minor fixes

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This commit is contained in:
Thomas Friedel 2020-02-14 16:28:24 +01:00
parent 7f7efd5a8a
commit 637509b5d4
2 changed files with 7 additions and 4 deletions
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9
backend/goglbackend/clip.go
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@ -17,11 +17,12 @@ func (b *GoGLBackend) Clip(pts [][2]float64) {
b.activate()
b.ptsBuf = b.ptsBuf[:0]
min, max := extent(pts)
b.ptsBuf = append(b.ptsBuf,
0, 0,
0, float32(b.fh),
float32(b.fw), float32(b.fh),
float32(b.fw), 0)
float32(min[0]), float32(min[1]),
float32(min[0]), float32(max[1]),
float32(max[0]), float32(max[1]),
float32(max[0]), float32(min[1]))
for _, pt := range pts {
b.ptsBuf = append(b.ptsBuf, float32(pt[0]), float32(pt[1]))
}

2
backend/goglbackend/fill.go
View file

@ -72,6 +72,8 @@ func (b *GoGLBackend) clearRect(x, y, w, h int) {
}
func extent(pts [][2]float64) (min, max vec) {
max[0] = -math.MaxFloat64
max[1] = -math.MaxFloat64
min[0] = math.MaxFloat64
min[1] = math.MaxFloat64
for _, v := range pts {