The transform methods
  
    Table of Contents
    About the transform methods
    Transform methods
    
   
  
    
About the transform methods
  
  
    The default coordinate system has its origin in the
    upper-left corner. The positive x-axis extends to the right.
    The positive y-axis extends downward. You can change this
    coordinate system by using one or more of the transform methods
    described on this page. This image shows the default coordinate
    system.
    
    This image shows a drawing without transformations.
    
    The transform methods are defined in the RVG, RVG::Group, and
    RVG::Use classes. You can also chain
    these methods to the shape methods
    and to the image method.
   
  
    
Transform methods
  
  
    matrix
    obj.matrix(sx, rx, ry, sy, tx, ty) ->
    obj
   
  
    Description
    Replaces the current transformation matrix with a new matrix
    having the specified values. See the SVG
    standard for more information.
    Arguments
    
      - sx, sy
- The scale factor in the x-dimension and
      y-dimension, measured in user coordinates.
- rx, ry
- The amount of rotation about the x-axis and y-axis,
      measured in degrees.
- tx, ty
- The translation on the x-axis and the
      y-axis, measured in user coordinates.
 
  
    rotate
    obj.rotate(angle[, cx, cy]) -> obj
   
  
    Description
    Rotates the axes about the origin or, if cx and cy are present,
    about the specified point.
    Arguments
    
      - angle
- The amount of rotation. Positive angles rotate clockwise,
      negative angles rotate counter-clockwise.
- cx, cy
- If present, the point to rotate about.
Example
    See scale.
   
  
    scale
    obj.scale(sx[, sy]) ->
    obj
   
  
    Description
    Scales the axes.
    Arguments
    
      - sx
- The amount of scaling on the x-axis.
- sy
- If present, the amount of scaling on the y-axis.
      Otherwise defaults to sx.
Example
    
   
  
    skewX
    obj.skewX(angle) -> obj
   
  
    Description
    Skews the x-axis.
    Arguments
    
      - angle
- The skew amount, measured in degrees.
Example
    See skewY
   
  
    skewY
    obj.skewY(angle) -> obj
   
  
    Description
    Skews the y-axis.
    Arguments
    
      - angle
- The skew amount, measured in degrees.
Example
    
   
  
    translate
    obj.translate(tx[, ty]) ->
    obj
   
  
    Description
    Moves the origin.
    Arguments
    
      - tx
- The location of the new origin on the x-axis.
- ty
- The location of the new origin on the y-axis. If omitted,
      defaults to tx.
Example
    