ps_translate(3) [php man page]

PS_TRANSLATE(3) 							 1							   PS_TRANSLATE(3)

ps_translate - Sets translation

SYNOPSIS

       bool ps_translate (resource  $psdoc, float  $x, float  $y)

DESCRIPTION

	Sets a new initial point of the coordinate system.

PARAMETERS

	      o $psdoc
		- Resource identifier of the postscript file as returned by ps_new(3).

	      o $x
		- x-coordinate of the origin of the translated coordinate system.

	      o $y
		- y-coordinate of the origin of the translated coordinate system.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      Translation of the coordinate system

	      <?php
	      function rectangle($ps) {
		  ps_moveto($ps, 0, 0);
		  ps_lineto($ps, 0, 50);
		  ps_lineto($ps, 50, 50);
		  ps_lineto($ps, 50, 0);
		  ps_lineto($ps, 0, 0);
		  ps_stroke($ps);
	      }

	      $ps = ps_new();
	      if (!ps_open_file($ps, "translate.ps")) {
		print "Cannot open PostScript file
";
		exit;
	      }

	      ps_set_info($ps, "Creator", "translate.php");
	      ps_set_info($ps, "Author", "Uwe Steinmann");
	      ps_set_info($ps, "Title", "Translated example");
	      ps_set_info($ps, "BoundingBox", "0 0 596 842");

	      $psfont = ps_findfont($ps, "Helvetica", "", 0);

	      ps_begin_page($ps, 596, 842);
	      ps_set_text_pos($ps, 100, 100);
	      ps_translate($ps, 500, 750);
	      rectangle($ps);
	      ps_translate($ps, -500, -750);
	      ps_setfont($ps, $psfont, 8.0);
	      ps_show($ps, "Text at initial position");
	      ps_end_page($ps);

	      ps_begin_page($ps, 596, 842);
	      ps_set_text_pos($ps, 100, 100);
	      ps_save($ps);
	      ps_translate($ps, 500, 750);
	      rectangle($ps);
	      ps_restore($ps);
	      ps_setfont($ps, $psfont, 8.0);
	      ps_show($ps, "Text at initial position");
	      ps_end_page($ps);

	      ps_delete($ps);
	      ?>

	      The  above  example  demonstrates  two possible ways to place a graphic (in this case just a rectangle) at any position on the page,
	      while the graphic itself uses its own coordinate system. The trick is to change the origin of the current coordinate  system  before
	      drawing the rectangle. The translation has to be undone after the graphic has been drawn.

	       On the second page a slightly different and more elegant approach is applied. Instead of undoing the translation with a second call
	      of ps_translate(3) the graphics context is saved before modifying the coordinate system and restored after drawing the rectangle.

SEE ALSO

       ps_scale(3), ps_rotate(3).

PHP Documentation Group 													   PS_TRANSLATE(3)

IMAGICKDRAW.PATHCURVETOQUADRATICBEZIERSMOOTHRELATIVE(3) 		 1		   IMAGICKDRAW.PATHCURVETOQUADRATICBEZIERSMOOTHRELATIVE(3)

ImagickDraw::pathCurveToQuadraticBezierSmoothRelative - Draws a quadratic Bezier curve

SYNOPSIS

       bool ImagickDraw::pathCurveToQuadraticBezierSmoothRelative (float  $x, float  $y)

DESCRIPTION

       Warning

	      This function is currently not documented; only its argument list is available.

	Draws  a  quadratic  Bezier  curve  (using  relative coordinates) from the current point to (x, y). The control point is assumed to be the
       reflection of the control point on the previous command relative to the current point. (If there is no previous command or if the  previous
       command was not a DrawPathCurveToQuadraticBezierAbsolute, DrawPathCurveToQuadraticBezierRelative, DrawPathCurveToQuadraticBezierSmoothAbso-
       lut or DrawPathCurveToQuadraticBezierSmoothRelative, assume the control point is coincident with the current point). At the end of the com-
       mand, the new current point becomes the final (x, y) coordinate pair used in the polybezier.

	This function cannot be used to continue a cubic Bezier curve smoothly. It can only continue from a quadratic curve smoothly.

PARAMETERS

	      o $x
		- ending x coordinate

	      o $y
		- ending y coordinate

RETURN VALUES

	No value is returned.

EXAMPLES

       Example #1

	      ImagickDraw::pathCurveToQuadraticBezierSmoothRelative

	      <?php
	      $draw = new ImagickDraw();

	      $draw->setStrokeOpacity(1);
	      $draw->setStrokeColor("black");
	      $draw->setFillColor("blue");

	      $draw->setStrokeWidth(2);
	      $draw->setFontSize(72);

	      $draw->pathStart();
	      $draw->pathMoveToAbsolute(50,250);

	      // This specifies a quadratic bezier curve with the current position as the start
	      // point, the control point is the first two params, and the end point is the last two params.
	      $draw->pathCurveToQuadraticBezierAbsolute(
		  150,50,
		  250,250
	      );

	      // This specifies a quadratic bezier curve with the current position as the start
	      // point, the control point is mirrored from the previous curves control point
	      // and the end point is defined by the x, y values.
	      $draw->pathCurveToQuadraticBezierSmoothAbsolute(
		  450,250
	      );

	      // This specifies a quadratic bezier curve with the current position as the start
	      // point, the control point is mirrored from the previous curves control point
	      // and the end point is defined relative from the current position by the x, y values.
	      $draw->pathCurveToQuadraticBezierSmoothRelative(
		  200,-100
	      );

	      $draw->pathFinish();

	      $imagick = new Imagick();
	      $imagick->newImage(700, 500, $backgroundColor);
	      $imagick->setImageFormat("png");

	      $imagick->drawImage($draw);

	      header("Content-Type: image/png");
	      echo $imagick->getImageBlob();
	      ?>

PHP Documentation Group 								   IMAGICKDRAW.PATHCURVETOQUADRATICBEZIERSMOOTHRELATIVE(3)