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ui: rename TransformOp.Mul to Multiply and split InvTransform

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Multiply is a bit longer but more clear. InvTransform was really
two operations: Invert and Transform.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2019-08-07 14:47:14 +02:00
parent 9be695cc24
commit fe20cde393
3 changed files with 12 additions and 8 deletions
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ui/ui.go
+8 -4
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@@ -56,19 +56,23 @@ func (r *InvalidateOp) Decode(d []byte) {
}
}
// Offset the transformation.
func (t TransformOp) Offset(o f32.Point) TransformOp {
return t.Mul(TransformOp{o})
return t.Multiply(TransformOp{o})
}
func (t TransformOp) InvTransform(p f32.Point) f32.Point {
return p.Sub(t.offset)
// Invert the transformation.
func (t TransformOp) Invert() TransformOp {
return TransformOp{offset: t.offset.Mul(-1)}
}
// Transform a point.
func (t TransformOp) Transform(p f32.Point) f32.Point {
return p.Add(t.offset)
}
func (t TransformOp) Mul(t2 TransformOp) TransformOp {
// Multiply by a transformation.
func (t TransformOp) Multiply(t2 TransformOp) TransformOp {
return TransformOp{
offset: t.offset.Add(t2.offset),
}