helperfunctions.h File Reference

#include "basicComponents.h"
#include "complexComponents.h"
#include <vector>
#include <set>

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Functions
Vertice	transform (Vertice v_in, double Xrot, double Yrot, double Zrot, double Xoff, double Yoff, double Zoff)
	Transforms a vertice (rotation and offset) using matrix multiplication and returns a new Vertice object. More...
pair< int, Vertice >	get_intersection (Edge a, Edge b)
	Finds intersection of two edges (line segments) and also returns error if intersection does not exist. More...
bool	is_inside (Vertice v, set< Edge > edgeSet)
	Checks whether a vertice is inside (in 2d) of a face formed by an edge loop. More...
bool	isSubset (vector< int > &a, vector< int > &b)
int	verticePresent (vector< Vertice > &a, Vertice b)
	Checks if a vertice is present in a vector of vertices. More...
WireFrame	modifyWireframe (WireFrame wf, Vertice v)
	Takes a wireframe and subtracts coordinates of v from all its edge vertices. More...

Function Documentation

get_intersection()

pair<int,Vertice> get_intersection	(	Edge	a,
		Edge	b
	)

Finds intersection of two edges (line segments) and also returns error if intersection does not exist.

returns (1,point of intersection) if intersecting, (0,_) if overlapping and (-1,_) if parallel Both edges are 2D edges

is_inside()

bool is_inside	(	Vertice	v,
		set< Edge >	edgeSet
	)

Checks whether a vertice is inside (in 2d) of a face formed by an edge loop.

Checks if vertex is inside the polygon defined by the edge set

isSubset()

bool isSubset	(	vector< int > &	a,
		vector< int > &	b
	)

A simple helper function to check if a is a subset of b

modifyWireframe()

WireFrame modifyWireframe	(	WireFrame	wf,
		Vertice	v
	)

Takes a wireframe and subtracts coordinates of v from all its edge vertices.

transform()

Vertice transform	(	Vertice	v_in,
		double	Xrot,
		double	Yrot,
		double	Zrot,
		double	Xoff,
		double	Yoff,
		double	Zoff
	)

Transforms a vertice (rotation and offset) using matrix multiplication and returns a new Vertice object.

get transformed 3D object

verticePresent()

int verticePresent	(	vector< Vertice > &	a,
		Vertice	b
	)

Checks if a vertice is present in a vector of vertices.

A simple helper function which checks if vertex is already present in vector (allowing for some error correction)