Hello,

I need to map 3D texture on a cube. I have it mapped on a sphere as follows:

const float da = PI/steps;

const float db = PI/steps;

glBegin(GL_QUADS);

for(float b = -PI/2; b < PI/2; b+=db)

for(float a = 0; a < 2*PI; a+=da){

DrawSphereVertexFunction( a, b, center, radius, tex);

DrawSphereVertexFunction( a, b+db, center,radius,tex);

DrawSphereVertexFunction( a+da, b+db, center,radius,tex);

DrawSphereVertexFunction( a+da, b, center, radius,tex);

};

```
glEnd();
```

/**************************************************************************************************************************************/

void DrawSphereVertexFunction(float a, float b, const V3f & where, float radius, Textured * t){

V3f pos(where); V3f n(cos(b)*sin(a),

cos(b)*cos(a),
sin(b));
pos += n*radius;

if(t){

```
t->SetTexture(pos);
```

}else{

//glColor3f(cos(b), cos(b)*cos(a), cos(b) cos(a+b));*n.y, 1*n.z);

glColor3f(0.5,0.5,0.5);

};

glNormal3f(1n.x, 1

glVertex3f(pos);

};

/***************************************************************************************************************************************/

Could any one help me converting and mapping the function to a cube?

Thank you in advance.