Method ApplyDeltaTransform

svg/rect.go:94–109

ApplyDeltaTransform applies the given 2D delta transforms to the geometry of this node relative to given point. Trans translation and point are in top-level coordinates, so must be transformed into local coords first. Point is upper left corner of selection box that anchors the translation and scal

(sv *SVG, trans math32.Vector2, scale math32.Vector2, rot float32, pt math32.Vector2)

// Point is upper left corner of selection box that anchors the translation and scaling,
// and for rotation it is the center point around which to rotate
func (g *Rect) ApplyDeltaTransform(sv *SVG, trans math32.Vector2, scale math32.Vector2, rot float32, pt math32.Vector2) {
	crot := g.Paint.Transform.ExtractRot()
	if rot != 0 || crot != 0 {
		xf, lpt := g.DeltaTransform(trans, scale, rot, pt, false) // exclude self
		g.Paint.Transform.SetMulCenter(xf, lpt)                   // todo: this might be backwards for everything
		g.SetProperty("transform", g.Paint.Transform.String())
	} else {
		// fmt.Println("adt", trans, scale, rot, pt)
		xf, lpt := g.DeltaTransform(trans, scale, rot, pt, true) // include self
		// opos := g.Pos
		g.Pos = xf.MulVector2AsPointCenter(g.Pos, lpt)
		// fmt.Println("apply delta trans:", opos, g.Pos, xf)
		g.Size = xf.MulVector2AsVector(g.Size)
		g.GradientApplyTransformPt(sv, xf, lpt)
	}
}

// WriteGeom writes the geometry of the node to a slice of floating point numbers
// the length and ordering of which is specific to each node type.