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 Last updated: Fri, 07 Jun 2013

# PDF_curveto

(PHP 4, PECL pdflib >= 1.0.0)

PDF_curvetoDraw Bezier curve

### Описание

bool PDF_curveto ( resource `\$p` , float `\$x1` , float `\$y1` , float `\$x2` , float `\$y2` , float `\$x3` , float `\$y3` )

Draws a Bezier curve from the current point, using 3 more control points. Возвращает `TRUE` в случае успешного завершения или `FALSE` в случае возникновения ошибки.

User Contributed Notes PDF_curveto - [2 notes]
rune at zedeler dot dk
8 years ago
``` Rod's function does not work (the thing produced is not even symmetrical). Here is one that produces a correct approximation to an ellipse: function pdf_ellipse (\$pdfobj,\$x,\$y,\$width,\$height) { // Function to draw an ellipse inscribed in a rectangle // described by lower left (x,y) with width and height.   \$fac = (4*sqrt(2)-4)/3;   \$dx = \$width*(1-\$fac)/2;   \$dy = \$height*(1-\$fac)/2;   pdf_moveto(\$pdfobj, \$x,\$y+\$height/2);   pdf_curveto(\$pdfobj, \$x,\$y+\$height-\$dy, \$x+\$dx,\$y+\$height, \$x+\$width/2,\$y+\$height);   pdf_curveto(\$pdfobj, \$x+\$width-\$dx,\$y+\$height, \$x+\$width,\$y+\$height-\$dy, \$x+\$width,\$y+\$height/2);   pdf_curveto(\$pdfobj, \$x+\$width,\$y+\$dy, \$x+\$width-\$dx,\$y, \$x+\$width/2,\$y);   pdf_curveto(\$pdfobj, \$x+\$dx,\$y, \$x,\$y+\$dy, \$x,\$y+\$height/2); } ```
rod-php at thecomplex dot com
10 years ago
``` function pdf_ellipse_inscribed (\$pdfobj,\$x,\$y,\$width,\$height) { // Function to draw an ellipse inscribed in a rectangle // described by lower left (x,y) with width and height.     pdf_moveto(\$pdfobj, \$x,\$y+\$height/2);     pdf_curveto(\$pdfobj, \$x,\$y+\$height/2,\$x,\$y+\$height,\$x+\$width/2,\$y+\$height);     pdf_curveto(\$pdfobj, \$x+\$width/2,\$y+\$height,\$x+\$width,\$y+\$height,\$x+\$width,\$y+\$height/2);     pdf_curveto(\$pdfobj, \$x+\$width,\$y+\$height/2,\$x+\$width,\$y,\$x+\$width/2,\$y);     pdf_curveto(\$pdfobj, \$x+\$width/2,\$y,\$x,\$y,\$x,\$y+\$height/2); } ```