Category : C Source Code
Archive   : GRAFGEM3.ZIP
Filename : GEOMETRY.H

// ******************************************************************
//
// Physically Correct Direct Lighting For Distribution Ray Tracing
// by Changyaw Wang
//
// geometry_object.h
//
// ******************************************************************

// Abstract class geom_obj may be subclassed to a particular type of
// object such as a sphere, or a triangle.

class point;

class geom_obj {
public:

// Selects a point visible from x given (r1,r2).
// Here, visible means not SELF-shadowed.

virtual void select_visible_point(
const point& x, // viewpoint
const double r1, // random number
const double r2, // random number
point& on_light, // point corresponding to (r1,r2)
double& prob); // probability of selecting on_light
};