Pena Contents
Introduction
Control Pane
Brush Pane
  • Brush Pane Introduction
  • Setting Brush Size
  • Save/Load Brushes
  • Circle Brush
    Square Brush
    Ellipse Brush
    Rectangle Brush
    Rotate/Offset
    Taper Brush
    Fit-To Brush
    Clocks
     
    Texture Pane
    Effects Pane
    Color Picker
    Save/Load Pane
    Selection Pane
    Preferences Pane
    Intelligent Canvas
    Wacom Bluetooth Stylus
    Jot Bluetooth Stylus
     
    The Effects Library
    Effects Introduction
    Color Source Effects
    Procedural Source Effects
    Color Filter Effects
    Spatial Filter Effects
    Math and Logic Effects
    Special Effects
     
    Artists Gallery
    The Artist Gallery
     
    Pena Support
    Troubleshooting

       

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      The Brush Pane

      Brush Pane Introduction


      The Brush Pane allows you to setup your basic brush that you use when painting in Pena. You access the Brush Pane by tapping the Brush Pane icon on the Control Pane:

      This next section outlines the basic functionality of the Brush Pane, or you can view the video tutorials Pena Tutorial #3 - The Brush Pane, Part 1, and Pena Tutorial #4 - The Brush Pane, Part 2.

      When the Brush Pane opens it will attach either to the top or bottom of the Control Pane, depending on where it can fit better.

      Changing the position of the Control Pane will also change the position of the Brush Pane.

      To close the Brush Pane simply hit the Brush Pane icon on the Control Pane. Opening up most other panes will also close the Brush Pane.

      Setting Brush Size


      On the left side of the Brush Pane is the Brush Size area. Depending on whether or not you have Square/Circle or Ellipse/Rectangle you will see one of the two looks below:

          

      For Squares and Circles you will see something like the image on the left. For Rectangles and Ellipses you will see something like the image on the right.

      There are two ways to set the Brush Size. First, tap, hold, and drag in the large square area to resize the brush. For Circle and Square, drag left and right to decrease or increase the brush size. For Ellipse and Rectangle drag left and right to make it change horizontal size and up/down to change the vertical size.

      As you drag in the sizing area, the brush size will change accordingly. You can make the brush bigger than the sizing area, and in fact, you can set the brush to be larger than the Canvas itself.

      Below the sizing area is the numeric size of the Brush. For a Circle or Square brush there is only one number which represents both the horizontal and vertical size. For an Ellipse or Rectangle brush there are two numbers, the first is the horizontal size and the second is the vertical size.

      You can tap the numeric values to enter sizes in via the iPad keyboard if you wish.

      Saving and Loading Brushes


      Pena offers several saving and loading mechanisms. The BrushPane has its own Save/Load system that lets you save your favorite custom brushes.

      On the right side of the Brush Pane is the Brush Save and Load area:

      To Save your current brush settings, tap the Brush Name area to display the keyboard. Enter a name for the brush and dismiss the keyboard.

      To Load a brush, flick the list of brushes until the brush you want to see is visible, then tap the name. You will get the following Pop Up:

      Tap the Cancel button to dismiss the Pop Up without taking any action. Otherwise the following choices are available:

      • Load Complete Brush - Select this to load the entire brush. This includes the brush Shape, Size, Rotation, Offset, Taper, and Clocks.
      • Load Rotate Info Only - Select this to only load the Brushes Rotation and Offset settings.
      • Load Taper Info Only - Select this to only load the Brushes Taper settings.
      • Load Clock Info Only - Select this to only load the four Clocks.
      • Save Current Brush Here - Select this to save your current brush over this pre-existing brush.
      To Delete saved brushes tap the red delete circle to the left of the brush name and confirm the deletion by tapping the red Delete that appears.

       

      Circle Brush


      Tap the Circle Brush icon to paint with circular brushes. Once you tap the Circle Brush icon the shape will change to a circle.

      Each brush type remembers its previous size setting, so Circle will appear as you left it last.

      Tap and drag horizontally in the sizing area to set the size of the brush, or tap the numeric size and enter the desired brush size using the keyboard.

      The brush can be made larger than the screen if you wish. Sizes below 2 are generally invisible.

       

      Square Brush


      Tap the Square Brush icon to paint with square brushes. Once you tap the Square Brush icon the shape will change to a square.

      Each brush type remembers its previous size setting, so Square will appear as you left it last.

      Tap and drag horizontally in the sizing area to set the size of the brush, or tap the numeric size and enter the desired brush size using the keyboard.

      The brush can be made larger than the screen if you wish. Sizes below 2 are generally invisible.

       

      Ellipse Brush


      Tap the Ellipse Brush icon to paint with elliptical and oval brushes. Once you tap the Ellipse Brush icon the shape will change to an ellipse.

      Each brush type remembers its previous size setting, so Ellipse will appear as you left it last.

      Tap and drag horizontally in the sizing area to set the horizontal size of the brush. Tap and drag vertically in the sizing area to set the vertical size of the brush. You can also tap the numeric size areas to enter the desired brush size using the keyboard.

      The brush can be made larger than the screen if you wish. Sizes below 2 x 2 are generally invisible.

       

      Rectangle Brush


      Tap the Rectangle Brush icon to paint with rectangular brushes. Once you tap the Rectangle Brush icon the shape will change to an rectangle.

      Each brush type remembers its previous size setting, so Rectangle will appear as you left it last.

      Tap and drag horizontally in the sizing area to set the horizontal size of the brush. Tap and drag vertically in the sizing area to set the vertical size of the brush. You can also tap the numeric size areas to enter the desired brush size using the keyboard.

      The brush can be made larger than the screen if you wish. Sizes below 2 x 2 are generally invisible.

       

      Rotate/Offset


      All brushes can have a Rotation Angle and Offset. Both the Angle and Offset can change over time.

      Very interesting effects can be created with rotating and offset brushes.

      By default Rotation and Offset is turned off. To use Rotation and Offset tap the Brush Rotate icon. You will see the following Pop Up:

      In the image above, both Rotate and Offset are turned on - however, the first time you see the above Pane they will be red X's instead of green check marks, indicating that they are off.

      Rotation and Offset are handled independently in this Pane. You can have either on or off at any time.

      The Brush Rotate icon shows whether you are using Rotation/Offset or not. If both Rotation and Offset are turned off, the icon will not be lit. If either or both Rotation and Offset are turned on, the icon will be lit:

      Brush Rotate and Offset are turned OFF
      Brush Rotate and/or Offset is turned ON

      Rotating Brushes...

      To turn Rotating Brushes On, tap the Red X next to Rotate Brush so that it turns to a Green Check Mark.

      There are two numeric values that control Rotate Brush:

      • Brush Angle - This is the initial rotation angle of the brush and can be between -360.0 and 360.0 degrees.
      • Angle Increment - This is the amount that is added to, or subtracted from the Brush Angle as you paint.
      You can use the thumb wheel or tap the number and enter it through the keyboard.

      You might wonder what use rotating a Circular Brush would have. Brush Rotation not only rotates the brush shape itself, it also rotates the content of the shape - the paint you are applying.

      Just about all of the Brush and Surface Effects will rotate as you paint. Many effects have a Fit-To-Brush choice that lets the entire effect to be applied to just the brush itself - these will also rotate.

      When you combine Brush Angle with Angle Increment you have a brush that rotates over time. Each time the brush is applied it is incremented by the specified Angle Increment. If the Increment is zero, the brush stays at the Brush Angle, otherwise it rotates in clockwise (for positive increments) or counter clockwise (for negative increments).

      Incrementing brushes give very interesting effects as you paint.

      Offset Brushes...

      To turn Offset Brushes On, tap the red X next to Offset Brush so that it turns to a green check mark.

      There are four numeric values that control Offset Brush:

      • Offset X - This is the amount the brush is offset in the horizontal (X) direction. This can be a value between -1024 and 1024.
      • Offset Y - This is the amount the brush is offset in the vertical (Y) direction. This can be a value between -1024 and 1024.
      • Offset X Step - This is the amount that is added to, or subtracted from the Offset X as you paint.
      • Offset Y Step - This is the amount that is added to, or subtracted from the Offset Y as you paint.
      You can use the thumb wheel or tap the number and enter it through the keyboard.

      Brush Offset has two uses:

      First, you can use Brush Offset to move the brush so it is not under your finger. This might be useful for fine detail work where you need to see the brush as you are painting.

      In this situation, you will want to leave Offset X and Y Step set to zero and just set the Offset X and Offset Y so the brush is offset from your finger as you desire.

      The second use for Offset Brushes is in conjunction with Rotated Brushes. If you apply an offset to a rotating brush, the brush rotates around the offset center. This gives a huge variety of effects, from tubes to flowers and more.

       

      Taper Brush


      The Brush Taper icon lets you specify a direction and amount to taper the brush while you are painting.

      Tapping on the Brush Taper icon will show the following Pop Up:

      The Pop Up choices are:

      • Use Tapered Brush - When this is a red X, the Brush will not be Tapered. When it is a green check-mark, the Brush will be Tapered.
      • Taper-To X Size - This is the final horizontal size that the Brush will stop Tapering at.
      • Taper-To Y Size - This is the final vertical size that the Brush will stop Tapering at.
      • Taper X Step - This is how much the brush tapers in the horizontal direction with each brush drawn.
      • Taper Y Step - This is how much the brush tapers in the vertical direction with each brush drawn.
      • The Brush Taper icon shows whether you are using tapering or not. If your are not using Brush Taper, the icon will not be lit. If Brush Taper is being used, the icon will be lit:

        Brush Taper is turned OFF
        Brush Taper is turned ON

        When using a Tapered Brush, the Brush always begins at the original Brush Size you have set for that Brush.

        As you tap, hold, and draw, with each Brush deposited on the Canvas the Brush will be tapered in the direction you specified, and in the amount each time you specified.

        This has the effect of either narrowing, or enlarging your brush, depending on your settings. Since you can set X and Y independently, you can grow in one direction and shrink in the other.

        You can achieve a variety of effects such as cones, tree parts, twigs, and other shapes by combining Tapering, Rotation, Offset, and the different Brush modes (Dot, Line, and Curve).

         

        Fit-To Brush


        The Fit To Texture icon lets you size your current Brush to the dimensions of one of the five Textures in the Texture Pane.

        This capability is useful when you want to paint with a shape that is exactly the same size as one of your textures (and in many cases textures can also be made to fit your Brush, though that is done in the Brush/Surface Effects, not here).

        If you do not have any Textures loaded, you will see this message:

        Tap OK to dismiss the message and continue.

        If you have one or more Textures loaded you will see something like this:

        Only Textures that you have loaded will appear as choices. Select the Texture you wish from the list or Cancel to not make any changes.

        Once you select a Texture, your current Brushes dimensions will take on the dimensions of the Texture, but the shape will not change.

        Note that changing the Texture will not change the Brush (you will need to redo this step to get the Brush to match the new Texture).

         

        Clocks


        The Clocks icon gives you access to the four Clocks provided in Pena.

        Clocks are useful for driving certain effects. You can think of a clock as a simple counter, that starts at some value that increases or decreases by a set amount over time.

        For example... 1, 2, 3, 4, 5, 6, 7... is a clock that started at 1 and incremented by 1 each time.

        Clocks have two basic uses in Pena:

        • Color Modifiers - Clocks can become colors or can be used to modify colors over time.
        • Effect Seeds - Many of the Brush and Surface Effects can use Clocks as a seed. This changes the effect. In many cases the seed can also allow the effect to be animated a frame at a time.
        There are four Clocks in Pena:

        Each clock has two numbers that define it:

        • Clock Start - This is the initial value that the Clock starts at.
        • Clock Step - This is the amount that the Clock increments or decrements by, each clock tick.
        If the Clock Step is zero, then the clock just acts as a static seed. Changing the Clock Start will change the basic effect, but it will remain that way until you change it again.

        By specifying a Clock Step you get your Clock to change each tick.

        What is a tick? Each brush hit you make constitutes one tick. If you are painting in Dot Brush mode, each dot is a tick. In Line and Curve Brush mode, each brush applied to each point on the line or curve is a tick. Likewise, each Flood Screen is a tick

        When does a Clock get reset back to its Clock Start? By default, each time you tap the screen to start painting the clock gets reset to its Clock Start. However, you can change this in the Preferences Pane. The Reset Clock on Paint choice lets you turn reset off. If you turn Clock reset off, the clock keeps incrementing or decrementing until the values are changed or you turn reset back on (most effects that use clocks also have a reset button in them).

        The Clock Step can be whatever you want, within the ranges provided. However, Brush and Surface Effects that use the clock have been set such that a Clock Step of .01 is roughly equal to one frame of movement.

         

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      pena © 2014 by David Cook
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