func (f *Imp) Invert() {
//
if f.Empty() {
return
}
switch f.sort {
case Pointset:
scr.PointsetInv(f.x, f.y)
case Segments:
scr.SegmentsInv(f.x, f.y)
case Polygon:
if f.filled {
scr.PolygonInv /* TODO Full */ (f.x, f.y)
} else {
scr.PolygonInv(f.x, f.y)
}
case Curve:
scr.CurveInv(f.x, f.y)
if f.filled {
n := len(f.x) - 1
scr.CircleInv(f.x[n], f.y[n], 4)
}
case InfLine:
scr.InfLineInv(f.x[0], f.y[0], f.x[1], f.y[1])
case Rectangle:
if f.filled {
scr.RectangleFullInv(f.x[0], f.y[0], f.x[1], f.y[1])
} else {
scr.RectangleInv(f.x[0], f.y[0], f.x[1], f.y[1])
}
case Circle:
if f.filled {
scr.CircleFullInv(f.x[0], f.y[0], uint(f.x[1]))
} else {
scr.CircleInv(f.x[0], f.y[0], uint(f.x[1]))
}
case Ellipse:
if f.filled {
scr.EllipseFullInv(f.x[0], f.y[0], uint(f.x[1]), uint(f.y[1]))
} else {
scr.EllipseInv(f.x[0], f.y[0], uint(f.x[1]), uint(f.y[1]))
}
case Text:
// >>> sollte in bx integriert werden:
// bx.WriteInvGr (tx, x[0], y[0])
scr.SwitchTransparence(true)
scr.WriteInvGr(f.tx, f.x[0], f.y[0])
case Image:
scr.RectangleInv(f.x[0], f.y[0], f.x[1], f.y[1])
}
}
func (f *Imp) invert1() {
//
switch f.sort {
case InfLine:
scr.InfLineInv(f.x[0], f.y[0], f.x[1], f.y[1])
case Rectangle:
scr.RectangleInv(f.x[0], f.y[0], f.x[1], f.y[1])
default:
scr.EllipseInv(f.x[0], f.y[0], uint(f.x[1]), uint(f.y[1]))
}
}
func paint(f figure, fo format, x0, y0, x, y int) {
//
var a, b uint
if x >= x0 {
a = uint(x - x0)
} else {
a = uint(x0 - x)
}
if y >= y0 {
b = uint(y - y0)
} else {
b = uint(y0 - y)
}
switch f {
case line:
switch fo {
case border:
scr.Line(x0, y0, x, y)
case inv:
scr.LineInv(x0, y0, x, y)
case full:
// scr.StrichAusgeben (x0, y0, x, y, Staerke)
}
case rectangle:
switch fo {
case border:
scr.Rectangle(x0, y0, x, y)
case inv:
scr.RectangleInv(x0, y0, x, y)
case full:
scr.RectangleFull(x0, y0, x, y)
}
case circle:
if b > a {
a = b
}
switch fo {
case border:
scr.Circle(x0, y0, a)
case inv:
scr.CircleInv(x0, y0, a)
case full:
scr.CircleFull(x0, y0, a)
}
case ellipse:
switch fo {
case border:
/*
scr.Ellipse ((x0 + x) / 2, (y0 + y) / 2, a, b)
case invers:
scr.EllipseInv ((x0 + x) / 2, (y + y0) / 2, a, b)
case full:
scr.EllipseFull ((x0 + x) / 2, (y0 + y) / 2, a, b)
*/
scr.Ellipse(x0, y0, a, b)
case inv:
scr.EllipseInv(x0, y0, a, b)
case full:
scr.EllipseFull(x0, y0, a, b)
}
}
// scr.Colour (paintColour), (* Wörkeraund: Bildschirm....Invertieren f *)
}