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NLMISC::CTriangle Class Reference

A simple triangles of 3 points. More...

#include <triangle.h>

Inheritance diagram for NLMISC::CTriangle:

NLMISC::CTriangleColor NLMISC::CTriangleColorUV NLMISC::CTriangleUV NL3D::CTrianglePatch List of all members.

Public Methods

 CTriangle ()
 Constructor. More...

 CTriangle (const CVector &a, const CVector &b, const CVector &c)
 Constructor. More...

bool intersect (const CVector &p0, const CVector &p1, CVector &hit, const class NLMISC::CPlane &plane) const
 Intersection detection with a segment. More...

void computeGradient (float c0, float c1, float c2, CVector &grad) const
 3D Gradient computation. More...


Public Attributes

CVector V0
CVector V1
CVector V2

Detailed Description

A simple triangles of 3 points.

Author:
Lionel Berenguier , Nevrax France
Date:
2000

Definition at line 51 of file triangle.h.

Constructor & Destructor Documentation

NLMISC::CTriangle::CTriangle (    )  [inline]
 

Constructor.

Definition at line 58 of file triangle.h.

Referenced by computeGradient, NLMISC::CTriangleColorUV::operator=, NLMISC::CTriangleUV::operator=, and NLMISC::CTriangleColor::operator=.

NLMISC::CTriangle::CTriangle (  const CVector &    a,
const CVector &    b,
const CVector &    c
)  [inline]
 

Constructor.

Definition at line 60 of file triangle.h.

References V0, V1, and V2.

Member Function Documentation

void NLMISC::CTriangle::computeGradient (  float    c0,
float    c1,
float    c2,
CVector &    grad
)  const
 

3D Gradient computation.

Given 3 values at the 3 corners 'ci' (gouraud, uv....), this method compute the gradients Grad. The formula to compute the interpolated value according to a 3d position 'v' in space is then simply:
c(v)= c0 + grad*(v-V0)

Definition at line 67 of file triangle.cpp.

References CTriangle, V0, V1, and V2.

bool NLMISC::CTriangle::intersect (  const CVector &    p0,
const CVector &    p1,
CVector &    hit,
const class NLMISC::CPlane &    plane
)  const
 

Intersection detection with a segment.

You must pass the normalized plane of the triangle as parameter.

Parameters:
p0  is the first point of the segment.
p1  is the second point of the segment.
hit  will receive the coordinate of the intersection if the method returns true.
plane  is the plane of the triangle. Build it like this: 
  CPlane plane;
  plane.make (triangle.V0, triangle.V1, triangle.V2);
Returns:
true if the segement [p0,p1] intersects the triangle else false.

Member Data Documentation

CVector NLMISC::CTriangle::V0
 

Definition at line 54 of file triangle.h.

Referenced by NL3D::CBSPTree::CBSPNode::CBSPNode, computeGradient, CTriangle, NL3D::CDriverUser::drawTriangle, NL3D::CCubeGrid::insert, NL3D::CBSPTree::CBSPNode::insert, NL3D::CCubeGrid::project, NL3D::CZoneLighter::rayTraceTriangle, and NL3D::CZoneLighter::testRaytrace.

CVector NLMISC::CTriangle::V1
 

Definition at line 54 of file triangle.h.

Referenced by NL3D::CBSPTree::CBSPNode::CBSPNode, computeGradient, CTriangle, NL3D::CDriverUser::drawTriangle, NL3D::CCubeGrid::insert, NL3D::CBSPTree::CBSPNode::insert, NL3D::CCubeGrid::project, NL3D::CZoneLighter::rayTraceTriangle, and NL3D::CZoneLighter::testRaytrace.

CVector NLMISC::CTriangle::V2
 

Definition at line 54 of file triangle.h.

Referenced by NL3D::CBSPTree::CBSPNode::CBSPNode, computeGradient, CTriangle, NL3D::CDriverUser::drawTriangle, NL3D::CCubeGrid::insert, NL3D::CBSPTree::CBSPNode::insert, NL3D::CCubeGrid::project, NL3D::CZoneLighter::rayTraceTriangle, and NL3D::CZoneLighter::testRaytrace.

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