Search DaniWeb - polygon

Re: Polygon Clipping 12 Years Ago by Taywin …determining whether the check is now inside a polygon if all points of origPolygon are inside …copy of all origPolygon points // the polygon is inside clip polygon end if if all points of … true // flag starting (could use size of result polygon as well) end if lastPtOPolygon <- currPtOPolygon end … Re: Polygon Clipping 12 Years Ago by Taywin … return a copy of all origPolygon points // the polygon is inside clip polygon end if if all points of clipPolygon are inside… return result end if On a side note: 1. the polygon should not add an edge which is already exists in… Re: Polygon Clipping 12 Years Ago by Taywin …;I've realized that it is an advantage if the polygon is convex. You don't need to determine if a… the inside direction. You said it. ;) Actually clipping a concave polygon (with either a convex or concave) can result in **more… reason to test whether a point is in a polygon. Whether the polygon is convex or concave, all you have to do… Re: Polygon Clipping 12 Years Ago by Taywin …gt;That would work just as well for a concave polygon as a convex polygon. Not really. The test for a point inside… about given a convex (rectangle) to clip with *a polygon*. The polygon is not necessary to be a rectangle. Seeing picture from… the attached image, I would assume that the other polygon must be a convex. @wtosh, it will be quite … Re: Polygon Clipping 12 Years Ago by bguild … direction. Instead of using two `float[]` arrays to represent the polygon, I would use a list of `java.awt.geom.Point2D… make use of a method that takes an Intersect, the polygon, and the rectangle and returns an instance of a private… the outline of the rectangle and then iterating through the polygon to see how many times the *other* edges of the… Re: Polygon Clipping 12 Years Ago by Taywin …the Cx,y is a part of new polygon (clipped polygon). 3.2 else the line created by Cx… or outside. You NEED to know what your polygon looks like. I believe that this assignment is… only convex polygons to be clipped. If the polygon is a convex, you will need to test… the point with all polygon edges and determine that it is result in … Polygon Clipping 12 Years Ago by wtosh … * */ public class clipper { /** * clipPolygon * * Clip the polygon with vertex count in and vertices inx/iny * against the… * * @return number of vertices in the polygon resulting after clipping * */ public float intersectX; … Re: Polygon Clipping 12 Years Ago by bguild … convex is a red herring when you are clipping a polygon to a rectangle. Being convex is helpful for determining if… and simply iterate over the edges and vertices of the polygon, checking and clipping each in turn. That would work just… Re: Polygon Clipping 12 Years Ago by bguild … no reason to test whether a point is in a polygon. All you need to do is test for points inside… rectangle, but surely that's not very useful. Whether the polygon is convex or concave, all you have to do is… to connect the new vertices that you create when the polygon comes back to the rectangle. Polygon' does not contain a constructor that takes '1' arguments (CS1729) 14 Years Ago by Stefano Mtangoo … I'm confused. Thanks using System; [CODE=C#]class Polygon{ string polygonName; Polygon(string pName){ polygonName = pName; } public string getName(){ …return polygonName; } } class MainClass{ public static void Main(){ Polygon pg = new Polygon("Iam a Triangle"); Console.WriteLine(pg.getName… Re: Polygon Clipping 12 Years Ago by bguild …. The Intersects will come already sorted, but depending on the polygon they may be going clockwise or counterclockwise. So I would… reverse everything: reverse the order of the vertices of the polygon, reverse the order of the Intersects, turn every inward Intersect… Re: Polygon Clipping 12 Years Ago by wtosh What am I doing wrong? I can't seem to get it clip the polygon at all. Re: Polygon Clipping 12 Years Ago by Taywin For testing a point in a convex polygon (triangle), it explains how to test and derive the algorithm equation to be much simplier. For intersection point, the person explains how to find it (somewhat algorithm). Polygon Program 20 Years Ago by JustinsCJ5 … supposed to let the user input how many vertices the polygon will have, then let them put in the vertices, calculate… program i should ask the user how many vertices the polygon will have, then i have to use a loop and… Polygon formula [for graphics] 16 Years Ago by Alex_ …. I want to make a function that will draw a polygon , depending on how many vertex's it has. I'm… Re: Polygon formula [for graphics] 16 Years Ago by Alibeg double pass2 = a; //where a is angle between line (first point of polygon joined with centre of polygon) and x axis.....you might like to set pass2 to 0 in the beginning while(k<n*2) { poly[k++]=x +r * cos(pass2); poly[k++]=y +r * sin(pass2); pass2 += pass; } this is how it goes i think Re: Polygon formula [for graphics] 16 Years Ago by Alex_ … ! But not really.. This is what i wrote [code] void polygon(int x, int y, int n, int r){ int k… Re: Polygon formula [for graphics] 16 Years Ago by Alex_ tried some modifications [code=c++]void polygon(int x, int y, int n, int r){ int k=… file polygon.h 16 Years Ago by roidel …",lokasiTembok[0],lokasiTembok[1]); // tembok yang kena vector tembok = polygon[lokasiTembok[0]].getLine(lokasiTembok[1]); //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// /** cari titik pantul */ vektor titikPantul… Class Polygon c++ 12 Years Ago by coutnoob …); int getEdge(int k); }; #endif polygon.cpp #include "polygon.h" Polygon::Polygon() { size=0; } Polygon::~Polygon() { delete [] len; } Polygon::Polygon(int k,int *l) { size=k… Draw polygon help 13 Years Ago by xcrypted1 …paintComponent(Graphics g) { Graphics2D g2 = (Graphics2D) g; Polygon square = new Polygon(); square.add(new Point2D.Double(100, 100)); square.add…add(new Point2D.Double(150, 100)); square.draw(g2); Polygon pentagon = new Polygon(); double centerX = 200; double centerY = 200; … Re: Class Polygon c++ 12 Years Ago by VernonDozier … sides are equal. I imagine it would inherit everything that polygon has, plus add a constructor taking a length and a… Re: Class Polygon c++ 12 Years Ago by Kanoisa … constructor will need a different number of arguments for each polygon type. One option is to take from printf or iostream… the interface class generic and expandable (im assuming thats what polygon will be ) Maybe its a push to far but i… Area of a Polygon 16 Years Ago by smoore …The choices are line, circle, ellipse, rectangle, and polygon. When the user selects a shape they are then asked…showing here is a modified version with just the polygon class and a main area where you can …= new JFrame("This is a Polygon"); frame.setSize(500,500); Polygon p = new Polygon(name, xPoints, yPoints, numOfPoints); frame… Re: flipping polygon of polygons 12 Years Ago by ashsha …edit I tried this: for (Polygon p : polygonList) { Polygon tempP = new Polygon(p.xpoints, p.ypoints, p.…, endY); polygonListMirror.add(pM); tempP = new Polygon(); } public Polygon move(Polygon p, double xMove, double yMove) { // Change… Re: Inside edge of a polygon 8 Years Ago by Jeff-Bennett …standpoint - the concept is called "Erosion of a polygon" and is not as simple as one would …of vertices of the inner edges of the thickly drawn polygon. As per "AssertNull 292" I am thinking…drawn line - so perpandicular distance from the original polygon to the internal polygon. Note - it is very easy for a rectangle… flipping polygon of polygons 12 Years Ago by ashsha … of it vertically. I know the points of the outside polygon and I have an ArrayList for the inner polygons. I… was able to flip the outside polygon. but how do I flipped the inner polygons keeping their… the new one? I know the center of the outside polygon and the flipped version. Imagine that you are playing cards… Re: Draw polygon help 13 Years Ago by NormR1 Did you look at other methods that might be useful? [QUOTE]Draw the polygon by joining adjacent points with a line,[/QUOTE] I referred to drawing lines earlier. What is in the ArrayList? Re: Draw polygon help 13 Years Ago by xcrypted1 … is only my second month learning Java. My square and polygon are now drawing like they should, except, the start and… Re: flipping polygon of polygons 12 Years Ago by Taywin …use the center point as origin point for the inner polygon in order to transform points before rotation. /* The… rotation/mirror method can directly be applied to the inner polygon. +---------+ | +---+ | | | | | | +---+ | +---------+ The polygons below are not sharing the …