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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 <stdlib.h>
#include <string.h>
#include <g3d/types.h>
#include <g3d/context.h>
#include <g3d/plugins.h>
#include <g3d/material.h>
#include <g3d/primitive.h>
EAPI
gboolean plugin_load_model_from_stream(G3DContext *context, G3DStream *stream,
G3DModel *model, gpointer user_data)
{
G3DImage *image = g_new0(G3DImage, 1);
G3DObject *object;
G3DMaterial *material;
guint32 x, y, index;
G3DFloat pcnt, prev_pcnt = 0.0;
if(!g3d_plugins_load_image_from_stream(context, stream, image)) {
g_free(image);
return FALSE;
}
material = g3d_material_new();
material->name = g_strdup("default material");
material->r = 0.4;
material->g = 0.4;
material->b = 0.4;
material->a = 1.0;
model->materials = g_slist_append(model->materials, material);
object = g3d_primitive_mesh(image->width, image->height, FALSE, FALSE,
material);
object->name = g_strdup("height field");
model->objects = g_slist_append(model->objects, object);
#if DEBUG > 0
g_debug("height field loader: image: %dx%dx%d",
image->width, image->height, image->depth);
#endif
for(y = 0; y < image->height; y ++) {
for(x = 0; x < image->width; x ++) {
index = y * image->width + x;
object->vertex_data[index * 3 + 0] = x;
object->vertex_data[index * 3 + 1] = y;
switch(image->depth) {
case 8:
object->vertex_data[index * 3 + 2] = 0.0 +
(G3DFloat)image->pixeldata[index] / 32.0;
break;
case 15:
case 16:
object->vertex_data[index*3+2] = 0.0 +
*((guint16*)&image->pixeldata[index]);
break;
case 24:
case 32:
object->vertex_data[index * 3 + 2] = 0.0 +
image->pixeldata[index * 4] / 32.0;
break;
default:
break;
}
pcnt = (G3DFloat)(y * image->width + x) /
(G3DFloat)(image->width * image->height);
if((pcnt - prev_pcnt) > 0.01) {
prev_pcnt = pcnt;
g3d_context_update_progress_bar(context, pcnt, TRUE);
}
g3d_context_update_interface(context);
} /* for(x) */
} /* for(y) */
return TRUE;
}
EAPI
gchar *plugin_description(G3DContext *context)
{
return g_strdup("Generate height fields from images.\n"
"Author: Markus Dahms");
}
EAPI
gchar **plugin_extensions(G3DContext *context)
{
return g3d_plugins_get_image_extensions(context);
}
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