SunshinePHP 2020 CFP Started

# PDF_lineto

(PHP 4, PECL pdflib >= 1.0.0)

PDF_linetoDesenează o linie

### Descrierea

PDF_lineto ( resource `\$p` , float `\$x` , float `\$y` ) : bool

Desenează o linie din punctul curent spre un alt punct. Întoarce valoarea `TRUE` în cazul succesului sau `FALSE` în cazul eșecului. add a note

### User Contributed Notes 2 notes

-1
rod-php at thecomplex dot com
16 years ago
``` function find_angle (\$x1, \$y1, \$x2, \$y2) {// This function takes two points (x1,y1) and (x2,y2)// as inputs and finds the slope and angle of a line// between those two points.  It returns the angle// and slope in an array. I can't figure out how to// return a NULL value, so if the two input points// are in a vertical line, the function returns// \$angle = 90 and \$slope = 0. I know this is wrong.        if ((\$x2-\$x1) != 0) {                \$slope = (\$y2-\$y1)/(\$x2-\$x1);                // Get rotation angle by finding the arctangent of the slope                \$angle = rad2deg(atan(\$slope));                if (\$x1 > \$x2) {                        \$angle = 180+\$angle;                } elseif (\$y1 > \$y2) {                        \$angle = 360+\$angle;                }        } else {                // Vertical line has no slope, 90deg angle                \$angle = 90;#               unset (\$slope);                \$slope = 0;        }        return array (\$angle, \$slope);} ```
-1
rod-php at thecomplex dot com
16 years ago
``` function find_length (\$x1, \$y1, \$x2, \$y2) {// Find distance between two points (x1,y1) and (x2,y2)// Also useful to find length of a line.        return sqrt( pow(\$x2-\$x1,2) + pow(\$y2-\$y1,2) );} ``` 