toon.vfl

/*
 * Shader Info : 카툰 shader 입니다.
 */

#include <math.h>
#include <shading.h>
// label pragma
#pragma label	baseclr1	"Base Color1"
#pragma label	baseclr2	"Base Color2"
#pragma label	specclr		"Spec Color"
#pragma label	bline_clr	"Black line"
#pragma label	spec_rate	"Spec rate"
#pragma label	dark_rate	"Dark rate"
#pragma label	bline_rate	"BLine rate"
// color  pragma
#pragma hint	baseclr1	color
#pragma hint	baseclr2	color
#pragma hint	specclr		color
#pragma hint	bline_clr	color
//범위설정 pragma
#pragma range	spec_rate	0 1.0
#pragma range	dark_rate	0 1.0
#pragma range	bline_rate	0 0.3
// help pragma
#pragma help	"This shader colors like a cartoon.  Surface elements"
#pragma help	"pointing away from the light source will be shaded with"
#pragma help	"0.25 the color, there will be a black strip around the"
#pragma help	"sillhouette edge from the illuminating light source"

/*
 grobal value
 N normal at point
 */

surface
hjcToon( 
		vector baseclr1 = {1, .7, .6}; // 베이스컬러1
		vector baseclr2 = { 0.545, 0.525, 0.306 } ; // 베이스컬러2
		vector specclr = {1, 1, 1}; // spec 컬러
		vector bline_clr = {0, 0, 0}; //bline 컬러
		float spec_rate = 0.1 ; // spec 강도
		float dark_rate = 0.5 ; // dare 강도
		float bline_rate = 0.2 ; // bline 강도
       )
{
	vector	nn;

	nn = frontface(normalize(N), I); // dot(normalize(N), I) < 0 이면 N값 반전

	Cf = ambient(); // ambient light model

	illuminance(P, N, PI) {
		Cf += Cl;
		if ( dot(nn, normalize(L)) >= ( 1.0 - spec_rate ) )
		{
			Cf *= specclr ;
		}else if ( ( ( dot(nn, normalize(L)) + 1.0 ) * 0.5 ) > dark_rate )
		// }else if ( dot(nn, normalize(L)) >= 0.0 )
		{
			Cf *= baseclr1 ;
		}else
		{
			Cf *= baseclr2 ;
		}
	}
	if ( abs( dot( normalize(nn), normalize(I) ) ) < bline_rate )
	{
		Cf = bline_clr ;
	}

}