Golang cairo_rel_line_to示例

示例#1

文件： surface.go 项目： ungerik/go-cairo

func (self *Surface) RelLineTo(dx, dy float64) {
	C.cairo_rel_line_to(self.context, C.double(dx), C.double(dy))
}

示例#2

文件： cairo.go 项目： jimmyfrasche/cairo

//RelLineTo is a relative-coordinate version of LineTo.
//The point v is considered a vector with the origin at the current point.
//
//If there is no current point, c is now in an error state.
//
//It is equivalent to
//	if p, ok := c.CurrentPoint(); ok {
//		c.LineTo(p.Add(v))
//	} else {
//		// c is broken now
//	}
//
//Originally cairo_rel_line_to.
func (c *Context) RelLineTo(v Point) *Context {
	x, y := v.c()
	C.cairo_rel_line_to(c.c, x, y)
	return c
}