Show camera.c syntax highlighted
/*
* The 3D Studio File Format Library
* Copyright (C) 1996-2001 by J.E. Hoffmann <je-h@gmx.net>
* All rights reserved.
*
* This program 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 program 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 program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: camera.c,v 1.12 2004/11/16 07:41:44 efalk Exp $
*/
#define LIB3DS_EXPORT
#include <lib3ds/camera.h>
#include <lib3ds/chunk.h>
#include <lib3ds/io.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <config.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
/*!
* \defgroup camera Cameras
*
* \author J.E. Hoffmann <je-h@gmx.net>
*/
/*!
* Return a new Lib3dsCamera object.
*
* Object is initialized with the given name and fov=45. All other
* values are 0.
*
* \param name Name of this camera. Must not be NULL. Must be < 64 characters.
*
* \return Lib3dsCamera object or NULL on failure.
*
* \ingroup camera
*/
Lib3dsCamera*
lib3ds_camera_new(const char *name)
{
Lib3dsCamera *camera;
ASSERT(name);
ASSERT(strlen(name)<64);
camera=(Lib3dsCamera*)calloc(sizeof(Lib3dsCamera), 1);
if (!camera) {
return(0);
}
strcpy(camera->name, name);
camera->fov=45.0f;
return(camera);
}
/*!
* Free a Lib3dsCamera object and all of its resources.
*
* \param camera Lib3dsCamera object to be freed.
*
* \ingroup camera
*/
void
lib3ds_camera_free(Lib3dsCamera *camera)
{
memset(camera, 0, sizeof(Lib3dsCamera));
free(camera);
}
/*!
* Dump information about a Lib3dsCamera object to stdout.
*
* \param camera Object to be dumped.
*
* \see lib3ds_file_dump_cameras
*
* \ingroup camera
*/
void
lib3ds_camera_dump(Lib3dsCamera *camera)
{
ASSERT(camera);
printf(" name: %s\n", camera->name);
printf(" position: (%f, %f, %f)\n",
camera->position[0], camera->position[1], camera->position[2]);
printf(" target (%f, %f, %f)\n",
camera->target[0], camera->target[1], camera->target[2]);
printf(" roll: %f\n", camera->roll);
printf(" fov: %f\n", camera->fov);
printf(" see_cone: %s\n", camera->see_cone ? "yes" : "no");
printf(" near_range: %f\n", camera->near_range);
printf(" far_range: %f\n", camera->far_range);
printf("\n");
}
/*!
* Read a camera definition from a file.
*
* This function is called by lib3ds_file_read(), and you probably
* don't want to call it directly.
*
* \param camera A Lib3dsCamera to be filled in.
* \param io A Lib3dsIo object previously set up by the caller.
*
* \return LIB3DS_TRUE on success, LIB3DS_FALSE on failure.
*
* \see lib3ds_file_read
*
* \ingroup camera
*/
Lib3dsBool
lib3ds_camera_read(Lib3dsCamera *camera, Lib3dsIo *io)
{
Lib3dsChunk c;
Lib3dsWord chunk;
if (!lib3ds_chunk_read_start(&c, LIB3DS_N_CAMERA, io)) {
return(LIB3DS_FALSE);
}
{
int i;
for (i=0; i<3; ++i) {
camera->position[i]=lib3ds_io_read_float(io);
}
for (i=0; i<3; ++i) {
camera->target[i]=lib3ds_io_read_float(io);
}
}
camera->roll=lib3ds_io_read_float(io);
{
float s;
s=lib3ds_io_read_float(io);
if (fabs(s)<LIB3DS_EPSILON) {
camera->fov=45.0;
}
else {
camera->fov=2400.0f/s;
}
}
lib3ds_chunk_read_tell(&c, io);
while ((chunk=lib3ds_chunk_read_next(&c, io))!=0) {
switch (chunk) {
case LIB3DS_CAM_SEE_CONE:
{
camera->see_cone=LIB3DS_TRUE;
}
break;
case LIB3DS_CAM_RANGES:
{
camera->near_range=lib3ds_io_read_float(io);
camera->far_range=lib3ds_io_read_float(io);
}
break;
default:
lib3ds_chunk_unknown(chunk);
}
}
lib3ds_chunk_read_end(&c, io);
return(LIB3DS_TRUE);
}
/*!
* Write a camera definition to a file.
*
* This function is called by lib3ds_file_write(), and you probably
* don't want to call it directly.
*
* \param camera A Lib3dsCamera to be written.
* \param io A Lib3dsIo object previously set up by the caller.
*
* \return LIB3DS_TRUE on success, LIB3DS_FALSE on failure.
*
* \see lib3ds_file_write
*
* \ingroup camera
*/
Lib3dsBool
lib3ds_camera_write(Lib3dsCamera *camera, Lib3dsIo *io)
{
Lib3dsChunk c;
c.chunk=LIB3DS_N_CAMERA;
if (!lib3ds_chunk_write_start(&c,io)) {
return(LIB3DS_FALSE);
}
lib3ds_io_write_vector(io, camera->position);
lib3ds_io_write_vector(io, camera->target);
lib3ds_io_write_float(io, camera->roll);
if (fabs(camera->fov)<LIB3DS_EPSILON) {
lib3ds_io_write_float(io, 2400.0f/45.0f);
}
else {
lib3ds_io_write_float(io, 2400.0f/camera->fov);
}
if (camera->see_cone) {
Lib3dsChunk c;
c.chunk=LIB3DS_CAM_SEE_CONE;
c.size=6;
lib3ds_chunk_write(&c, io);
}
{
Lib3dsChunk c;
c.chunk=LIB3DS_CAM_RANGES;
c.size=14;
lib3ds_chunk_write(&c, io);
lib3ds_io_write_float(io, camera->near_range);
lib3ds_io_write_float(io, camera->far_range);
}
if (!lib3ds_chunk_write_end(&c,io)) {
return(LIB3DS_FALSE);
}
return(LIB3DS_TRUE);
}
/*!
\typedef Lib3dsCamera
\ingroup camera
\sa _Lib3dsCamera
*/
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