Boundary Filled Algorithm:

Polygon Fill Algorithms

Have you ever been creatively stuck? Your designs seem stale or uninspired. Creativity is key to creating unique and impactful art and design. Fortunately, there are ways to revive your creativity. Polygon Fill Algorithms primitives is one method.

Repeating patterns of filled-area primitives like circles, squares, triangles, and polygons form complicated designs. You can freely express your imagination by playing with these basic forms’ sizes, colors, and combinations. For millennia, art and design have used filled-area designs to add visual appeal and beauty. DIY-filled area designs are a wonderful way to exercise your creativity and personality.

Polygon Fill Algorithms
Polygon Fill Algorithms

This post will help you start using filled-area primitives to increase your creativity and creative skills. Artistic creativity is in your DNA—just tap into it. Filled-area primitives are a simple and open-ended way to spark creativity. Grab your favorite tools and let’s create!

Getting Creative With Filled Area Primitives

Filled area primitives are one of the most versatile tools in your digital design arsenal. They allow you

to quickly create shapes, icons, and illustrations.

Getting Creative With Filled Area Primitives

  • Apply gradients, patterns, and textures to filled areas. This instantly adds visual interest and depth.
  • Use the pathfinder tool to combine, subtract, intersect and exclude filled shapes from each other. New forms emerge before your eyes!
  • Add rounded corners of varying degrees to make stiff shapes friendly. Softened edges are pleasing to the eye.
  • Skew, rotate, resize and reposition filled shapes freely. Move things around until something clicks.
  • Blend filled areas together for a smooth transition between colors or shapes. Let one shape morph into another.
  • Use the pen tool to create your own custom filled shapes.

With some experimentation, filled area primitives can become a wellspring of inspiration. Why limit yourself to presets when you have the power to craft something uniquely your own? Get creative and see where it leads you!

The Variety of Filled Area Shapes Available

When it comes to filled-area primitives, the options are plentiful.

  • Circles: Perfect for creating wheels, bubbles, balloons, or any round shape. Just specify the center point and radius.
  • Ellipses: like circles but oval-shaped. Great for eye shapes or irregular bubbles. Set the center point, width and height.
  • Rectangles: Your go-to for boxes, frames, or any four-sided figure. Enter the upper left and lower right coordinates.
  • Polygons let you create any shape with multiple straight sides. Give it a sequence of points and it will connect the dots.
  • Bezier curves: For smooth curved lines and swooping shapes. Set anchor and control points to manipulate the curve.

With a little imagination, these fundamental, filled-area building blocks can be combined to make complex works of art.

How to Use Filled Areas Effectively in Your Designs

How to Use Filled Areas Effectively in Your Designs
How to Use Filled Areas Effectively in Your Designs

Filled areas in design refer to shapes, icons, and illustrations filled with color. Using them effectively in your designs can help capture attention, convey concepts, and visually represent your ideas.

Use Contrast

Choose fill colors that contrast well with the background to make the filled shapes pop. For example, use a bright red fill on a neutral gray background. The high contrast will make the shape immediately stand out.

Keep It Simple

Don’t overcomplicate things by using too many different fill colors, shapes, or sizes in one design. Keep it minimal by sticking to a consistent color palette and sizing filled elements proportionally. Simplicity and consistency are key.

Use Fills Sparingly

Don’t overcrowd your design with lots of filled shapes. Use them strategically to highlight and draw attention to the most important elements. Having too many filled areas competes for attention and creates a cluttered, messy look.

Consider Meaning

Think about how fill colors relate to the overall theme or message in your design. For example, use green fills in an eco-friendly theme or blue fills for a water-related subject. Filled shapes can be a useful visual metaphor when the fill color has meaning.

Leave Space

Give filled shapes plenty of empty space around them. Don’t crowd the shapes by placing them too close together. Allow the shapes to breathe by spacing them further apart. This makes each shape stand on its own and gives your design a clean, uncluttered appearance.

Boundary-Fill and Flood-Fill Algorithms:

Boundary-Fill and Flood-Fill Algorithms:
Boundary-Fill and Flood-Fill Algorithms:

The Boundary-Fill and Flood-Fill Algorithms:

Boundary-fill and flood-fill are techniques used to fill areas in images with color. They start at a point (often called the “seed point”) and fill connected areas of the same color.

The flood-fill algorithm fills areas that are enclosed by boundaries, while the boundary-fill algorithm fills areas that share an edge with the area’s boundary. These are useful for coloring and shading digital images.

You select a “seed point” – a pixel in the area you want to fill. The algorithm then fills all connected pixels of similar color. You can fill areas, shapes and segments in your image with solid colors or gradients using these techniques.

Some applications of boundary-fill and flood-fill include:

  • Coloring book apps
  • Painting and drawing apps
  • Photo editing software
  • Computer animation
  • Video game design

Unleash your creativity by experimenting with different fill algorithms and color palettes. Produce fun effects and impressive results. These primitives provide a simple way to add color, depth and interest to your digital artwork.

Seed-Fill Algorithm

The seed-fill algorithm is one of the simplest ways to fill closed areas in vector graphics. It works by starting at a point inside the shape and radiating out from there.

How It Works

The algorithm selects a random “seed” point inside the shape and then finds all the points surrounding it, coloring them in. It then continues selecting points along the edge of the filled area and filling them in until the entire shape is filled. This continues one layer at a time, with each new layer bordering the previous one, until the area is completely filled.

The seed-fill tool is very useful for quickly filling in basic shapes, especially irregular ones. However, for more complex shapes it can miss spots or spill over into adjacent shapes. It also struggles with shapes that have “islands” – separate enclosed areas within the main shape. Despite these limitations, the seed-fill algorithm remains a simple, efficient way to color in vector graphics and is still used in many design programs today.

Polygon Fill Algorithms:

Once you have the tools, it’s time to fill those shapes! Polygon fill algorithms determine how the inside of a shape is colored in. There are a few common methods for filling polygons:

  • Non-zero winding rule: This rule fills any region where the winding number (number of times a ray crosses a shape’s outline) is odd. It can fill complex concave shapes but may lead to unintended fills.
  • Even-odd rule: This simple rule fills any region where the number of crossings is odd. It avoids unintended fills but cannot handle concave shapes.
  • Scanline fill: This incremental algorithm fills one scanline (row) at a time by calculating intersections with the shape outline. It can fill any convex or concave shape but is complicated to implement.

Choosing a fill algorithm depends on your specific needs. Experiment with different techniques to find one suited to your creative visions. Filling those shapes is a key step towards unleashing your creativity!


So there you have it, filled area primitives are a simple but powerful way to add visual interest to your artwork. Don’t be afraid to experiment with different shapes, sizes, angles, and layering. Start with basic circles, squares and triangles and build up from there. Filled area primitives are meant to be fun, so unleash your creativity and see what you can come up with. You’ll be amazed at how much life and depth these simple shapes can add to your work. Give filled area primitives a try in your next piece of art – your creativity will thank you!

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