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GAUGE3D::GTriangle Class Reference

Represents a triangle in 3-space. More...

#include <gauge3d/3dmath/triangle.h>

List of all members.

Public Methods
	GTriangle ()
	Leaves vertices uninitialized.
	GTriangle (const GVector &vertex1,const GVector &vertex2,const GVector &vertex3)
	Initializes vertices to specified values.
	GTriangle (GVector vertices[])
	Initializes to a three-vertex array.
void	GetPlane (GPlane *plane)const
	Gets the plane which the triangle is on. More...
void	Reverse ()
	Reverses the direction of the vertices. More...
bool	Contains (const GVector &point)
	Returns true if the point is on the triangle.
int8	Intersects (const GLine &line)
	Finds whether or not the line intersects the triangle, and from which side if so. More...
GVector&	operator[] (int index)
	Array access to vertices.
const GVector&	operator[] (int index)const
	Array access to vertices.

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Detailed Description

Represents a triangle in 3-space.

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Member Function Documentation

void GAUGE3D::GTriangle::GetPlane ( GPlane * plane ) const

Gets the plane which the triangle is on. Parameters: plane   Points to the location to which to write the plane. Note: The plane will face in the direction from which the vertices of the triangle appear clockwise.

void GAUGE3D::GTriangle::Reverse ( )

Reverses the direction of the vertices. Remarks: This does not reverse the order of the vertices. It just swaps two of the vertices so that clockwise becomes counter-clockwise. This also means that the direction that the triangle faces will be reversed, since that direction is the direction from which the vertices appear in clockwise order.

int8 GAUGE3D::GTriangle::Intersects ( const GLine & line )

Finds whether or not the line intersects the triangle, and from which side if so. Parameters: line   The line with which to test for intersection. Returns: 0 if there is no intersection, 1 if the line hits the front of the triangle, or -1 if the line hits the back of the triangle. (the front side is the side from which the vertices of the triangle appear clockwise.) Remarks: This function is very fast. It is actually faster than Contains(), so if you want to find the point of intersection, first call this and then call GPlane::FindIntersection if necessary.

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The documentation for this class was generated from the following file:

• gauge3d/3dmath/triangle.h

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