interesting
/
go-opengl-pixel
mirror of https://github.com/faiface/pixel.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Add Rect.AnchorTo()

This commit is contained in:
Nathanaël Jourdane 2020-08-10 17:25:09 +02:00
parent 2c79e7325a
commit 50e1d8c96b
1 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
geometry.go
View File

@ -548,7 +548,7 @@ func (r Rect) Edges() [4]Line {
} }
// AnchorPos enumerates available anchor positions, such as `Center`, `Top`, `TopRight`, etc. // AnchorPos enumerates available anchor positions, such as `Center`, `Top`, `TopRight`, etc.
type AnchorPos struct{ v Vec } type AnchorPos struct{ Val Vec }
var ( var (
Center = AnchorPos{V(0.5, 0.5)} Center = AnchorPos{V(0.5, 0.5)}
@ -590,8 +590,14 @@ func (anchorPos AnchorPos) String() string {
// AnchorPos returns the position of the given anchor of the Rect. // AnchorPos returns the position of the given anchor of the Rect.
func (r *Rect) AnchorPos(anchor AnchorPos) Vec { func (r *Rect) AnchorPos(anchor AnchorPos) Vec {
// func (u Vec) ScaledXY(v Vec) Vec { return r.Min.Add(r.Size().ScaledXY(anchor.Val))
return r.Min.Add(r.Size().ScaledXY(anchor.v)) }
// AnchorTo updates the Rect position to align it on the given anchor.
func (r *Rect) AnchorTo(anchor AnchorPos) {
size := r.Size()
r.Min = r.Min.Sub(size.ScaledXY(anchor.Val))
r.Max = r.Max.Sub(size.ScaledXY(anchor.Val))
} }
// Center returns the position of the center of the Rect. // Center returns the position of the center of the Rect.