qrcode.net c# example Left-click-drag to paint Right-click-drag to erase in Software

Painting QR Code in Software Left-click-drag to paint Right-click-drag to erase

Left-click-drag to paint Right-click-drag to erase
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FIGURE 17-8
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Create your own two-color pattern by clicking the Create pattern; then edit an existing preset pattern
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CorelDRAW X4: The Official Guide
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You can also create patterns by using the Tools | Create | Pattern menu command
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Applying Texture Fills
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When you choose a texture fill (the Interactive Fill Tool has been chosen), the Property Bar (shown next) displays texture-related options, including a Texture Library selector, a Texture Fill selector, and options for controlling the appearance of the texture
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Ill 17-19
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Edit Fill
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Texture Library
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Transform Fill With Object
Mirror Fill Tiles
Regenerate Texture
Texture Fill selector
Texture Options
Copy Fill Properties
The interactive handles surrounding a texture fill are the same as those for Pattern fills; they re there for you to set the size, offset, skew, and rotation of the texture If you have experience manipulating pattern fills by click-dragging the control handles above the object, you ll discover bitmap fills are exactly the same However, because these are bitmap-based textures, you ll need to take note of some transformation limitations, covered shortly As you ll discover next, each texture is based on a range of variables specific to a style type To view these core styles, you ll need to open the Texture Fill dialog (see Figure 17-9) by clicking the Edit Fill button You ll notice below that the same options available in the Property Bar are in the dialog but also included when you click the Edit Fill button are the texture variables There are settings for texture, color, frequency of properties of the textures, and so on Don t hesitate to drag a spin box value and then click Preview; although several of the values might seem to have strange labels for the values, they ll indeed modify the texture preset (changing the Texture # is a great place to begin experimenting) Also, it s very hard to give a label to some of the properties of fractal math; they re abstract attributes and fairly difficult to write in the first place! Start by choosing a type of texture from the Texture List, and then use different values in fields such as colors (another good starting place) Click Preview, and
CHAPTER 17:
Filling Objects
FIGURE 17-9
Texture fills are based on fractal and procedural math algorithms, which generate images based on math recipes
if you like what you see, save it as a Preset, click OK to apply the texture, and then use the control handles for the Interactive Fill Tool to adjust the fill as it appears in the selected shape
Ill 17-20
CorelDRAW X4: The Official Guide
What Is a Fractal
Fractal geometry is based on mathematical equations, whose core is beyond the scope of this book; however, fractal geometry usually appears to have the following visual characteristics:
Self-similarity Fractal designs branch with variations set by the mathematician writing the fractal math, but typically a fractal design repeats a basic structure within itself at smaller scales, branching from a main body in the design This is why many fractals look like organic forms such as ferns, broccoli, and seashells these designs in nature also obey fractal math A recursive structure with irregularities As with self-similarity, fractals repeat, with variations, as they branch If you re familiar with Euclidean geometry, fractal math is too unpredictable when plotted to 2D space to be described in Euclidian geometric functions Exist within a domain of 2D or 3D space Fractal math is used in several 3D programs to generate organic sculptures KPT Frax4D, in fact, is a plug-in for PHOTO-PAINT and other bitmap programs that can generate fractal designs in 3D space Fractals were once described by a mathematician using this analogy: if a square represents the number 2 and a cube represents the number 3, fractals live somewhere between these two integers
Understand that not all the Texture fills use fractal math; some use procedures (a recipe of equations), but overall, they re just fun to add to a design And because they re math-based they can be rendered to the size you need this is part of what the Regenerate button on the Property Bar is for
The textures are based on more than a hundred different styles ranging from bubbles and clouds through minerals, raindrops, ripples, rock, and vapor Many of the fractal patterns in the Samples libraries do not seamlessly tile all on their own Fractal math can be coded as nonterminating (which creates an infinite branching and can be quite processor-intensive) and terminating, which means the math ends at a certain point and you ll see a tile edge in your design once in a while To fix this: click the Mirror button on the Property Bar when the object is selected and when the Interactive Fill Tool is chosen Alternatively, this option is available by clicking the Tiling button on the Property Bar, to display the Texture Fill dialog, where there s a check box for Mirroring at lower right The texture fill will then appear in your object as a seamless one, regardless of how you scale, rotate, and skew the pattern
CHAPTER 17:
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