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Define bounds on both circle and rect for use with interfaces #316

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Define bounds on both circle and rect for use with interfaces #316

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8 changes: 8 additions & 0 deletions circle.go
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,14 @@ func (c Circle) Area() float64 {
return math.Pi * math.Pow(c.Radius, 2)
}

// Bounds returns the bounding box for the circle
func (c Circle) Bounds() Rect {
return Rect{
Min: V(c.Center.X-c.Radius, c.Center.Y-c.Radius),
Max: V(c.Center.X+c.Radius, c.Center.Y+c.Radius),
}
}

// Moved returns the Circle moved by the given vector delta.
func (c Circle) Moved(delta Vec) Circle {
return Circle{
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5 changes: 5 additions & 0 deletions rectangle.go
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Expand Up @@ -70,6 +70,11 @@ func (r Rect) Area() float64 {
return r.W() * r.H()
}

// Bounds returns the bounding box for the rect (itself)
func (r Rect) Bounds() Rect {
return r
}

// Edges will return the four lines which make up the edges of the rectangle.
func (r Rect) Edges() [4]Line {
corners := r.Vertices()
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