Stack Overflow
Stack Overflow

Questions tagged [gpc]

The General Polygon Clipper (GPC) is a software library providing for computing the results of clipping operations on sets of polygons. It generalises the computer graphics clipping problem of intersecting polygons with polygons.

The first release of GPC was designed and implemented in 1997 at the University of Manchester by Alan Murta. As of August 2009 the current GPC release was version 2.32.

GPC is free for non-commercial use, and its author encourages the free use of GPC to support research, teaching and academic applications.

To use GPC in support of commercial applications, a Licence from the University of Manchester is required. The Licensing Manager at the University of Manchester is Toby Howard.

The core GPC library is written in the C programming language. The library has also been ported to work with several other languages.

These informations was taken from the wikipedia page of the GPC.

20 questions
0
votes
1 answer

Installing gpc on Ubuntu 14.04

I am trying to install the gpc (5:2.1-4.1.2-43ubuntu1) on the ubuntu 14.01, but it continues to say: The following packages have unmet dependencies: gpc-4.1 : Depends: gcc-4.1 (>= 4.1.2-2) but it is not going to be installed But when I use gcc…
gany
  • 3
  • 4
0
votes
3 answers

what does it mean to only allow expected input in php?

I'm reading a book on php security, and on input validation chapter there's a small section that talks about only allowing expected input. This is the code that they show:
Ant100
  • 403
  • 1
  • 8
  • 26
0
votes
1 answer

javaGeom - NullPointerException when trying to get the difference of two polygons

I have this method in my class (under Google App Engine), which simply gets a math.geom2d.polygon.Polygon2D object to calculate its difference with another local Polygon2D. This is how it looks: public void substractPolygon(Polygon2D polygon){ …
fdansv
  • 87
  • 2
  • 8
0
votes
1 answer

c++ Determine images in a polygon contour

I am using GPC (General Polygon Clipper) to create sets of images. I am unable to determine if the images are from disjoint sets though. I am using a gpc_polygon struct defined at the above link, reading the vertex list from an image data (lat/lon…
Thalia
  • 13,637
  • 22
  • 96
  • 190
-1
votes
2 answers

BigQuery: IFNULL after an UPDATE column, then "LIV"

Im new in all of this and Im having a dificult time doing the following: After an Alter Table where Im adding a new column Im updating the values based on another column. What a want to do is where there is a null after the process put the name…
samcglml
  • 1
1
2