vec3 _getPCFCubeMap( samplerCube sampler, vec3 normal, float scale ){	mat3	matrix_rotation;	vec3 	rotated_normal;	vec3 	a				=	vec3(0.0);	float pcf_step	=	(90.0/16.0)*scale;	pcf_step+=	pcf_step*0.5;	//	convert to radians	scale=pcf_step*0.01745329252f;;	float angle[7];	angle[0]	=	-3.0*scale;	angle[1]	=	-2.0*scale;	angle[2]	=	  1.0*scale;	angle[3]	=    0.0*scale;	angle[4]	=	 1.0*scale;	angle[5]	=	 2.0*scale;	angle[6]	=	 3.0*scale;	for(int j=0;j<3;++j){		for(int i=0;i<7;++i){						if(j==0){					//	rotation around z				matrix_rotation[0]	=	vec3(cos(angle),-sin(angle),0);				matrix_rotation[1]	=	vec3(sin(angle),cos(angle),0);				matrix_rotation[2]	=	vec3(0,0,1);				vec3 rotated_normal	=	matrix_rotation*normal;				a 	+= 	textureCube(sampler,rotated_normal).rgb*dot(rotated_normal, normal);			}						if(j==1){					//	rotation around y				matrix_rotation[0]	=	vec3(cos(angle),0,sin(angle));				matrix_rotation[1]	=	vec3(0,1,0);				matrix_rotation[2]	=	vec3(-sin(angle),0,cos(angle));				vec3 rotated_normal	=	matrix_rotation*normal;				a 	+= 	textureCube(sampler,rotated_normal).rgb*dot(rotated_normal, normal);			}			if(j==2){					//	rotation around x				matrix_rotation[0]	=	vec3(1,0,0);				matrix_rotation[1]	=	vec3(0,cos(angle),-sin(angle));				matrix_rotation[2]	=	vec3(0,sin(angle),cos(angle));				vec3 rotated_normal	=	matrix_rotation*normal;				a 	+= 	textureCube(sampler,rotated_normal).rgb*dot(rotated_normal, normal);			}				}	}	a/=21;	return a;}