Added Rect{,2D,Rel,Rel2D} methods on Point{,F,F32} to create a rectangle with the point as minimum.

point.go

@@ -90,6 +90,26 @@ func (p Point) Norm() Point {
 	return Pt(ints.Norm(p.X), ints.Norm(p.Y))
 }
 
+// Rect returns a rectangle starting from point p to given point q
+func (p Point) Rect(q Point) Rectangle {
+	return Rectangle{Min: p, Max: q}
+}
+
+// Rect2D returns a rectangle starting from point p to given coordinate (x, y)
+func (p Point) Rect2D(x, y int) Rectangle {
+	return Rectangle{Min: p, Max: Pt(x, y)}
+}
+
+// RectRel returns a rectangle starting from point p with the given size.
+func (p Point) RectRel(size Point) Rectangle {
+	return RectRel(p.X, p.Y, size.X, size.Y)
+}
+
+// RectRel2D returns a rectangle starting from point p with the given width and height
+func (p Point) RectRel2D(width, height int) Rectangle {
+	return RectRel(p.X, p.Y, width, height)
+}
+
 // String returns a string representation of point p "X, Y".
 func (p Point) String() string {
 	return fmt.Sprintf("%d, %d", p.X, p.Y)

pointf.go

@@ -137,6 +137,26 @@ func (p PointF) Mul(t float64) PointF {
 	return PtF(p.X*t, p.Y*t)
 }
 
+// Rect returns a rectangle starting from point p to given point q
+func (p PointF) Rect(q PointF) RectangleF {
+	return RectangleF{Min: p, Max: q}
+}
+
+// Rect2D returns a rectangle starting from point p to given coordinate (x, y)
+func (p PointF) Rect2D(x, y float64) RectangleF {
+	return RectangleF{Min: p, Max: PtF(x, y)}
+}
+
+// RectRel returns a rectangle starting from point p with the given size.
+func (p PointF) RectRel(size PointF) RectangleF {
+	return RectRelF(p.X, p.Y, size.X, size.Y)
+}
+
+// RectRel2D returns a rectangle starting from point p with the given width and height
+func (p PointF) RectRel2D(width, height float64) RectangleF {
+	return RectRelF(p.X, p.Y, width, height)
+}
+
 // Sub subtracts q as a vector from p.
 func (p PointF) Sub(q PointF) PointF {
 	return PointF{p.X - q.X, p.Y - q.Y}

pointf32.go

@@ -137,6 +137,26 @@ func (p PointF32) Mul(t float32) PointF32 {
 	return PtF32(p.X*t, p.Y*t)
 }
 
+// Rect returns a rectangle starting from point p to given point q
+func (p PointF32) Rect(q PointF32) RectangleF32 {
+	return RectangleF32{Min: p, Max: q}
+}
+
+// Rect2D returns a rectangle starting from point p to given coordinate (x, y)
+func (p PointF32) Rect2D(x, y float32) RectangleF32 {
+	return RectangleF32{Min: p, Max: PtF32(x, y)}
+}
+
+// RectRel returns a rectangle starting from point p with the given size.
+func (p PointF32) RectRel(size PointF32) RectangleF32 {
+	return RectRelF32(p.X, p.Y, size.X, size.Y)
+}
+
+// RectRel2D returns a rectangle starting from point p with the given width and height
+func (p PointF32) RectRel2D(width, height float32) RectangleF32 {
+	return RectRelF32(p.X, p.Y, width, height)
+}
+
 // Sub subtracts q as a vector from p.
 func (p PointF32) Sub(q PointF32) PointF32 {
 	return PointF32{p.X - q.X, p.Y - q.Y}