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/* $Id:$ */
/*
libg3d - 3D object loading library
Copyright (C) 2005-2009 Markus Dahms <mad@automagically.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include <g3d/types.h>
#include <g3d/material.h>
static G3DMaterial *get_material(G3DModel *model, const gchar *cname)
{
G3DMaterial *material;
GSList *item;
for(item = model->materials; item != NULL; item = item->next) {
material = item->data;
if(strcmp(material->name, cname) == 0)
return material;
}
return NULL;
}
#define DXF_COL_SET(rx, gx, bx) \
material->r = ((G3DFloat)(rx) / 255.0); \
material->g = ((G3DFloat)(gx) / 255.0); \
material->b = ((G3DFloat)(bx) / 255.0);
/*
* based on GPL code from
* http://wiki.inkscape.org/wiki/index.php/SOC_Accepted_Proposals
*/
static gboolean set_aci(G3DMaterial *material, gint32 aci)
{
G3DFloat r, g, b, h, s, l, m;
gint32 mod10;
if((aci < 10) || (aci > 249)) {
switch(aci) {
case 0: DXF_COL_SET(0x00, 0x00, 0x00); break;
case 1: DXF_COL_SET(0xFF, 0x00, 0x00); break;
case 2: DXF_COL_SET(0xFF, 0xFF, 0x00); break;
case 3: DXF_COL_SET(0x00, 0xFF, 0x00); break;
case 4: DXF_COL_SET(0x00, 0xFF, 0xFF); break;
case 5: DXF_COL_SET(0x00, 0x00, 0xFF); break;
case 6: DXF_COL_SET(0xFF, 0x00, 0xFF); break;
case 7: DXF_COL_SET(0xFF, 0xFF, 0xFF); break;
case 8: DXF_COL_SET(0x80, 0x80, 0x80); break;
case 9: DXF_COL_SET(0xC0, 0xC0, 0xC0); break;
case 250: DXF_COL_SET(0x33, 0x33, 0x33); break;
case 251: DXF_COL_SET(0x5B, 0x5B, 0x5B); break;
case 252: DXF_COL_SET(0x84, 0x84, 0x84); break;
case 253: DXF_COL_SET(0xAD, 0xAD, 0xAD); break;
case 254: DXF_COL_SET(0xD6, 0xD6, 0xD6); break;
case 255: DXF_COL_SET(0xFF, 0xFF, 0xFF); break;
default: break;
}
} else {
mod10 = aci % 10;
h = 1.5 * (aci - mod10 - 10);
s = ((aci % 2) ? 0.5 : 1.0);
if(mod10 < 2) l = 1.0;
else if(mod10 < 4) l = 0.8;
else if(mod10 < 6) l = 0.6;
else if(mod10 < 8) l = 0.5;
else l = 0.3;
if(h <= 120) {
r = (120 - h) / 60;
g = h / 60;
b = 0;
} else if(h <= 240) {
r = 0;
g = (240 - h) / 60;
b = (h - 120) / 60;
} else if(h <= 360) {
r = (h - 240) / 60;
g = 0;
b = (360 - h) / 60;
}
r = MIN(r, 1.0);
g = MIN(g, 1.0);
b = MIN(b, 1.0);
m = MAX(r, MAX(g, b));
material->r = (m - s * (m - r)) * l;
material->g = (m - s * (m - g)) * l;
material->b = (m - s * (m - b)) * l;
}
return TRUE;
}
G3DMaterial *dxf_color_get_material(G3DModel *model, gint32 aci)
{
gchar *cname;
G3DMaterial *material;
cname = g_strdup_printf("color #%d", ABS(aci));
material = get_material(model, cname);
if(material != NULL) {
g_free(cname);
return material;
}
material = g3d_material_new();
material->name = cname;
model->materials = g_slist_append(model->materials, material);
set_aci(material, ABS(aci));
#if DEBUG > 0
g_debug("| color: %.2f %.2f %.2f", material->r, material->g, material->b);
#endif
return material;
}
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