Flipping textPath direction from anti-clockwise to clockwise?

问题

By default, SVG wraps text around a path in an anti-clockwise manner. The ceiling of the text sticks the path. How to change the direction to clockwise so that the floor of the text sticks to the circumference instead of the ceiling?

.textspace
{
	letter-spacing: 5px;
	font-family: fantasy;
	font-size: 50px;
	writing-mode: tb;
}

.curved-text
{
	font-family: fantasy;
	font-size: 20px;
	letter-spacing: 5px;
	word-spacing: 10px;
}

	<svg height="400" width="400">
		<defs>
			<path	d="M60,60
						A50,50
						0 
						1,0
						61,60"
						stroke="black"
						stroke-width="2"
						fill="none"
						id="tracker-path"/>
		</defs>
		<text x="50" y="50" class="curved-text">
			<textPath xlink:href="#tracker-path">
				Tracking succesful.
			</textPath>
		</text>
	</svg>

回答1:

I managed to solve this. All you need to do is set the value of sweep-flag from 0 to 1. That will flip the direction of path

.textspace
{
	letter-spacing: 5px;
	font-family: fantasy;
	font-size: 50px;
	writing-mode: tb;
}

.curved-text
{
	font-family: fantasy;
	font-size: 20px;
	letter-spacing: 5px;
	word-spacing: 10px;
}

<svg height="400" width="400">
		<defs>
			<path	 d="M80,160
						A50,50
						0 
						1,1
						81,160"
						stroke="black"
						stroke-width="2"
						fill="none"
						id="tracker-path"/>
		</defs>
		<text x="50" y="50" class="curved-text">
			<textPath xlink:href="#tracker-path">
				Tracking succesful.
			</textPath>
		</text>
	</svg>

来源：https://stackoverflow.com/questions/29588905/flipping-textpath-direction-from-anti-clockwise-to-clockwise