# What is scan line polygon fill algorithm explain the algorithm with the help of an example use appropriate diagrams wherever necessary?

## What is scan line polygon fill algorithm explain the algorithm with the help of an example use appropriate diagrams wherever necessary?

Scan Line Algorithm Step 1 − Find out the Ymin and Ymax from the given polygon. Step 2 − ScanLine intersects with each edge of the polygon from Ymin to Ymax. Name each intersection point of the polygon. As per the figure shown above, they are named as p0, p1, p2, p3.

**What is boundary fill algorithm?**

Boundary fill is the algorithm used frequently in computer graphics to fill a desired color inside a closed polygon having the same boundary color for all of its sides. The most approached implementation of the algorithm is a stack-based recursive function.

**What is fence fill algorithm?**

Fence fill algorithm is a modified edge fill algorithm. As opposed to the edge fill algorithm that fills pixels… Expand.

### What are advantages of scan line polygon fill algorithm?

Advantage of scan-line fill: It does fill in the same order as rendering, and so can be pipelined. Scan Line Fill: What happens at edge end-point? Edge endpoint is duplicated. In other words, when a scan line intersects an edge endpoint, it intersects two edges.

**What is scan line filling algorithm?**

Scanline Polygon filling Algorithm Scanline filling is basically filling up of polygons using horizontal lines or scanlines. The purpose of the SLPF algorithm is to fill (color) the interior pixels of a polygon given only the vertices of the figure.

**What is scan line polygon fill algorithm in computer graphics?**

This algorithm lines interior points of a polygon on the scan line and these points are done on or off according to requirement. The polygon is filled with various colors by coloring various pixels. In above figure polygon and a line cutting polygon in shown.

## What is difference between boundary fill and flood fill?

The crucial differing point in these algorithms is that the flood-fill first checks whether a random pixel is having the region’s original colour or not. Conversely, the boundary-fill examines for boundary pixel and it has already been filled or not.

**What is the use of fill algorithm?**

Flood fill is an algorithm mainly used to determine a bounded area connected to a given node in a multi-dimensional array. It is a close resemblance to the bucket tool in paint programs.

**What is scan fill algorithm?**

Scanline filling is basically filling up of polygons using horizontal lines or scanlines. The purpose of the SLPF algorithm is to fill (color) the interior pixels of a polygon given only the vertices of the figure.

### What is the purpose of scan line algorithm?

It processes one line at a time rather than one pixel at a time. It uses the concept area of coherence. This algorithm records edge list, active edge list. So accurate bookkeeping is necessary.

**Which algorithm is used to draw a line?**

Bresenham’s line algorithm is a line drawing algorithm that determines the points of an n-dimensional raster that should be selected in order to form a close approximation to a straight line between two points.

**What is boundary fill and flood fill?**

In Flood-fill algorithm a random colour can be used to paint the interior portion then the old one is replaced with a new one. In Boundary-fill algorithm Interior points are painted by continuously searching for the boundary colour. It requires huge amount of memory.

## What is advantage and disadvantage of scan line filling algorithm?

The advantages of Scan line algorithm are as follows:= 1) It takes advantage of coherence resulting in fast algorithm. 2) It does require as much storage as depth buffer. 3) It only draws visible pixels. 4) This algorithm is common in software.

**Which is faster boundary fill or flood fill?**

Boundary-fill algorithm is faster than the Flood-fill algorithm. In Flood-fill algorithm a random colour can be used to paint the interior portion then the old one is replaced with a new one. In Boundary-fill algorithm Interior points are painted by continuously searching for the boundary colour.

**What is filling filling vs boundary filling?**

### What is seed filling algorithm?

Flood fill, also called seed fill, is a flooding algorithm that determines and alters the area connected to a given node in a multi-dimensional array with some matching attribute.

**Is flood fill algorithm?**

Flood fill also called as seed fill is an algorithm to determine the area connected to the given node in a multi-dimensional array. The most common use of this is to use it as a bucket to fill connected, same colored areas in the painting apps Or in the images to replace the pixels with same color.

**Which of the following is a line drawing algorithm?**

Question 2: Which of the following is a line drawing algorithm? Explanation: All the mentioned algorithms: Line equation algorithm, the DDA algorithm and the Bressenham’s line drawing algorithm are used for line drawing in computer graphics.

## What is area filling algorithm explain its types?

Filled Area Primitives: Region filling is the process of filling image or region. Filling can be of boundary or interior region as shown in fig. Boundary Fill algorithms are used to fill the boundary and flood-fill algorithm are used to fill the interior.

**What is line drawing algorithm with example?**

In computer graphics, a line drawing algorithm is an algorithm for approximating a line segment on discrete graphical media, such as pixel-based displays and printers. On such media, line drawing requires an approximation (in nontrivial cases). Basic algorithms rasterize lines in one color.

**What is scan line algorithm for filling of Polygon?**

The figure (a) illustrates the scan line algorithm for filling of polygon. For each scan line crossing a polygon, this algorithm locates the intersection points of the scan line with the polygon edges.

### What are the different fill algorithms?

Polygon Filling Algorithm Scan Line Algorithm. This algorithm works by intersecting scanline with polygon edges and fills the polygon between… Flood Fill Algorithm. Sometimes we come across an object where we want to fill the area and its boundary with different… Boundary Fill Algorithm. The

**What is polygon line cutting algorithm?**

This algorithm lines interior points of a polygon on the scan line and these points are done on or off according to requirement. The polygon is filled with various colors by coloring various pixels. In above figure polygon and a line cutting polygon in shown.

Introduction : Boundary Fill Algorithm starts at a pixel inside the polygon to be filled and paints the interior proceeding outwards towards the boundary. This algorithm works only if the color with which the region has to be filled and the color of the boundary of the region are different.