special_instruction

图形处理算法合集3：包括图形处理、帧缓存技术、渲染、矩阵运算、建模方法

// ******************************************************************
//
// The following C++ code computes a sample point and its probability 
// on the spherical or triangular luminaire according to the solid 
// angle from the view point.  These are the center part of the direct 
// lighting computation via Monte Carlo integration.
//
// The function hit() is assumed to exist. It returns the intersection 
// point of a ray and a luminaire.
//  
// Use the command, CC -c *.C -lm, to compile (not link).  The code 
// needs to be combined with a ray tracer to complete. 
// ******************************************************************