The Canvas API is a low level API for drawing. It lets you create lines, curves, polygons, and circles and fill them in with colors, gradients, and so on.
CanvasAPI是一个低级画图api，它支持创建直线、曲线、多边形和圆圈，并用彩色、渐变色等填充它们。
The library is feature-rich in functions, including rotation, animation, scaling and drawing curves, rectangles and circles.
功能极其丰富，包括旋转，动画，缩放等。
For example, they divided the design of a fish into head, body and fins, alternating straight lines with curves, triangles and circles.
他们把一条鱼的侧面分割为鱼头、鱼身、鱼鳍几部分，用直线、孤线、三角形和圆圈等来表现。
This algorithm USES the coherence properties of regions and is especially suitable for regions bounded by closed curves, eg. circles, ellipses etc.
本算法的特点是利用面积相关性，而且特别适合于封闭曲线所围成的区域，如圆和椭圆等区域。
Firstly, to the rectangle window, algorithms for clipping lines, circles and ellipses, as well as parametric curves are introduced.
首先对于矩形窗口，介绍了直线裁剪算法，圆和椭圆裁剪算法以及参数曲线的裁剪算法。
Firstly, to the rectangle window, algorithms for clipping lines, circles and ellipses, as well as parametric curves are introduced.
首先对于矩形窗口，介绍了直线裁剪算法，圆和椭圆裁剪算法以及参数曲线的裁剪算法。
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