Blender V2.61 - r43446

node_shader_hueSatVal.c

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00001 /*
00002  * ***** BEGIN GPL LICENSE BLOCK *****
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License
00006  * as published by the Free Software Foundation; either version 2
00007  * of the License, or (at your option) any later version. 
00008  *
00009  * This program is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  * GNU General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software Foundation,
00016  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00017  *
00018  * The Original Code is Copyright (C) 2006 Blender Foundation.
00019  * All rights reserved.
00020  *
00021  * The Original Code is: all of this file.
00022  *
00023  * Contributor(s): Juho Vepsäläinen
00024  *
00025  * ***** END GPL LICENSE BLOCK *****
00026  */
00027 
00033 #include "node_shader_util.h"
00034 
00035 
00036 /* **************** Hue Saturation ******************** */
00037 static bNodeSocketTemplate sh_node_hue_sat_in[]= {
00038     {   SOCK_FLOAT, 1, "Hue",           0.5f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, PROP_NONE},
00039     {   SOCK_FLOAT, 1, "Saturation",        1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 2.0f, PROP_FACTOR},
00040     {   SOCK_FLOAT, 1, "Value",         1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 2.0f, PROP_FACTOR},
00041     {   SOCK_FLOAT, 1, "Fac",           1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, PROP_FACTOR},
00042     {   SOCK_RGBA, 1, "Color",          0.8f, 0.8f, 0.8f, 1.0f},
00043     {   -1, 0, ""   }
00044 };
00045 static bNodeSocketTemplate sh_node_hue_sat_out[]= {
00046     {   SOCK_RGBA, 0, "Color"},
00047     {   -1, 0, ""   }
00048 };
00049 
00050 /* note: it would be possible to use CMP version for both nodes */
00051 static void do_hue_sat_fac(bNode *UNUSED(node), float *out, float *hue, float *sat, float *val, float *in, float *fac)
00052 {
00053     if(*fac!=0.0f && (*hue!=0.5f || *sat!=1.0f || *val!=1.0f)) {
00054         float col[3], hsv[3], mfac= 1.0f - *fac;
00055         
00056         rgb_to_hsv(in[0], in[1], in[2], hsv, hsv+1, hsv+2);
00057         hsv[0]+= (*hue - 0.5f);
00058         if(hsv[0]>1.0f) hsv[0]-=1.0f; else if(hsv[0]<0.0f) hsv[0]+= 1.0f;
00059         hsv[1]*= *sat;
00060         hsv[2]*= *val;
00061         hsv_to_rgb(hsv[0], hsv[1], hsv[2], col, col+1, col+2);
00062         
00063         out[0]= mfac*in[0] + *fac*col[0];
00064         out[1]= mfac*in[1] + *fac*col[1];
00065         out[2]= mfac*in[2] + *fac*col[2];
00066     }
00067     else {
00068         copy_v4_v4(out, in);
00069     }
00070 }
00071 
00072 static void node_shader_exec_hue_sat(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
00073 {   
00074     do_hue_sat_fac(node, out[0]->vec, in[0]->vec, in[1]->vec, in[2]->vec, in[4]->vec, in[3]->vec);
00075 }
00076 
00077 
00078 static int gpu_shader_hue_sat(GPUMaterial *mat, bNode *UNUSED(node), GPUNodeStack *in, GPUNodeStack *out)
00079 {
00080     return GPU_stack_link(mat, "hue_sat", in, out);
00081 }
00082 
00083 void register_node_type_sh_hue_sat(bNodeTreeType *ttype)
00084 {
00085     static bNodeType ntype;
00086 
00087     node_type_base(ttype, &ntype, SH_NODE_HUE_SAT, "Hue Saturation Value", NODE_CLASS_OP_COLOR, NODE_OPTIONS);
00088     node_type_compatibility(&ntype, NODE_OLD_SHADING|NODE_NEW_SHADING);
00089     node_type_socket_templates(&ntype, sh_node_hue_sat_in, sh_node_hue_sat_out);
00090     node_type_size(&ntype, 150, 80, 250);
00091     node_type_exec(&ntype, node_shader_exec_hue_sat);
00092     node_type_gpu(&ntype, gpu_shader_hue_sat);
00093 
00094     nodeRegisterType(ttype, &ntype);
00095 }