--- /dev/null
+/*
+ * 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>
+#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
+
+*/
projects / summerhack / blobdiff