World Struct Reference

Public Member Functions
	World (const Vector &_n)
Vector	operator() (const Vector &local) const
Vector	local (const Vector &global) const
	World (const Vector &_n)
Vector	operator() (const Vector &local) const

Public Attributes
Vector	t
Vector	b
Vector	n

Detailed Description

Definition at line 333 of file tuto_cubemap.cpp.

Constructor & Destructor Documentation

World() [1/3]

World::World ( )

inline

Definition at line 335 of file tuto_cubemap.cpp.

: t(), b(), n() {}

World() [2/3]

World::World ( const Vector & _n )

inline

Definition at line 337 of file tuto_cubemap.cpp.

                              : n(_n) 
    {
        float s= std::copysign(float(1), n.z);  // s= 1 ou -1
        float a= -1 / (s + n.z);
        float d= n.x * n.y * a;
        t= Vector(1 + s * n.x * n.x * a, s * d, -s * n.x);
        b= Vector(d, s + n.y * n.y * a, -n.y);        
    }

World() [3/3]

World::World ( const Vector & _n )

inline

Definition at line 135 of file tuto_is.cpp.

                              : n(_n) 
    {
        if(n.z < -0.9999999f)
        {
            t= Vector(0, -1, 0);
            b= Vector(-1, 0, 0);
        }
        else
        {
            float a= 1.f / (1.f + n.z);
            float d= -n.x * n.y * a;
            t= Vector(1.f - n.x * n.x * a, d, -n.x);
            b= Vector(d, 1.f - n.y * n.y * a, -n.y);
        }
    }

Member Function Documentation

operator()() [1/2]

Vector World::operator() ( const Vector & local ) const

inline

Definition at line 347 of file tuto_cubemap.cpp.

{ return local.x * t + local.y * b + local.z * n; }

local()

Vector World::local ( const Vector & global ) const

inline

Definition at line 350 of file tuto_cubemap.cpp.

{ return Vector(dot(global, t), dot(global, b), dot(global, n)); }

operator()() [2/2]

Vector World::operator() ( const Vector & local ) const

inline

Definition at line 151 of file tuto_is.cpp.

    {
        return local.x * t + local.y * b + local.z * n;
    }

Member Data Documentation

t

Vector World::t

Definition at line 352 of file tuto_cubemap.cpp.

b

Vector World::b

Definition at line 353 of file tuto_cubemap.cpp.

n

Vector World::n

Definition at line 354 of file tuto_cubemap.cpp.

---

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

• gkit2_tutos/tuto_cubemap.cpp
• gkit2_tutos/M2/tuto_is.cpp