Programming PHP

The pdf_arc( ) function draws an arc of a circle:
pdf_arc(pdf, x, y, r, alpha, beta);
The circle is centered at (x,y) and has radius r. The starting point of the arc is alpha
degrees (measured counterclockwise from the horizontal axis), and the endpoint is
beta degrees.
Use pdf_curveto( ) to draw a Bézier curve from the current point:
pdf_curveto(pdf, x1, y1, x2, y2, x3, y3);
The points (x1,y1), (x2,y2), and (x3,y3) are control points through which the curve
must pass.
You can draw a rectangle with pdf_rect( ):
pdf_rect(pdf, x, y, width, height);
To draw a line from the current point backto the point that started the path, use
pdf_closepath( ):
pdf_closepath(pdf);
Example 10-9 defines a simple path and strokes it.
Example 10-9. A simple graphic path
The output of Example 10-9 is shown in Figure 10-9.
We can use pdf_closepath( ) and pdf_fill_stroke( ) to close the path and then fill it
with the current fill color by replacing the pdf_stroke( ) call in Example 10-9 with
these two lines:
pdf_closepath($p);
pdf_fill_stroke($p);
250 | Chapter 10: PDF
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