--- /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: mesh.c,v 1.22 2004/11/20 08:33:56 efalk Exp $
+ */
+#define LIB3DS_EXPORT
+#include <lib3ds/mesh.h>
+#include <lib3ds/io.h>
+#include <lib3ds/chunk.h>
+#include <lib3ds/vector.h>
+#include <lib3ds/matrix.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#ifdef WITH_DMALLOC
+#include <dmalloc.h>
+#endif
+
+
+/*!
+ * \defgroup mesh Meshes
+ *
+ * \author J.E. Hoffmann <je-h@gmx.net>
+ */
+
+
+static Lib3dsBool
+face_array_read(Lib3dsMesh *mesh, Lib3dsIo *io)
+{
+ Lib3dsChunk c;
+ Lib3dsWord chunk;
+ int i;
+ int faces;
+
+ if (!lib3ds_chunk_read_start(&c, LIB3DS_FACE_ARRAY, io)) {
+ return(LIB3DS_FALSE);
+ }
+ lib3ds_mesh_free_face_list(mesh);
+
+ faces=lib3ds_io_read_word(io);
+ if (faces) {
+ if (!lib3ds_mesh_new_face_list(mesh, faces)) {
+ LIB3DS_ERROR_LOG;
+ return(LIB3DS_FALSE);
+ }
+ for (i=0; i<faces; ++i) {
+ strcpy(mesh->faceL[i].material, "");
+ mesh->faceL[i].points[0]=lib3ds_io_read_word(io);
+ mesh->faceL[i].points[1]=lib3ds_io_read_word(io);
+ mesh->faceL[i].points[2]=lib3ds_io_read_word(io);
+ mesh->faceL[i].flags=lib3ds_io_read_word(io);
+ }
+ lib3ds_chunk_read_tell(&c, io);
+
+ while ((chunk=lib3ds_chunk_read_next(&c, io))!=0) {
+ switch (chunk) {
+ case LIB3DS_SMOOTH_GROUP:
+ {
+ unsigned i;
+
+ for (i=0; i<mesh->faces; ++i) {
+ mesh->faceL[i].smoothing=lib3ds_io_read_dword(io);
+ }
+ }
+ break;
+ case LIB3DS_MSH_MAT_GROUP:
+ {
+ char name[64];
+ unsigned faces;
+ unsigned i;
+ unsigned index;
+
+ if (!lib3ds_io_read_string(io, name, 64)) {
+ return(LIB3DS_FALSE);
+ }
+ faces=lib3ds_io_read_word(io);
+ for (i=0; i<faces; ++i) {
+ index=lib3ds_io_read_word(io);
+ ASSERT(index<mesh->faces);
+ strcpy(mesh->faceL[index].material, name);
+ }
+ }
+ break;
+ case LIB3DS_MSH_BOXMAP:
+ {
+ char name[64];
+
+ if (!lib3ds_io_read_string(io, name, 64)) {
+ return(LIB3DS_FALSE);
+ }
+ strcpy(mesh->box_map.front, name);
+ if (!lib3ds_io_read_string(io, name, 64)) {
+ return(LIB3DS_FALSE);
+ }
+ strcpy(mesh->box_map.back, name);
+ if (!lib3ds_io_read_string(io, name, 64)) {
+ return(LIB3DS_FALSE);
+ }
+ strcpy(mesh->box_map.left, name);
+ if (!lib3ds_io_read_string(io, name, 64)) {
+ return(LIB3DS_FALSE);
+ }
+ strcpy(mesh->box_map.right, name);
+ if (!lib3ds_io_read_string(io, name, 64)) {
+ return(LIB3DS_FALSE);
+ }
+ strcpy(mesh->box_map.top, name);
+ if (!lib3ds_io_read_string(io, name, 64)) {
+ return(LIB3DS_FALSE);
+ }
+ strcpy(mesh->box_map.bottom, name);
+ }
+ break;
+ default:
+ lib3ds_chunk_unknown(chunk);
+ }
+ }
+
+ }
+ lib3ds_chunk_read_end(&c, io);
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * Create and return a new empty mesh object.
+ *
+ * Mesh is initialized with the name and an identity matrix; all
+ * other fields are zero.
+ *
+ * See Lib3dsFaceFlag for definitions of per-face flags.
+ *
+ * \param name Mesh name. Must not be NULL. Must be < 64 characters.
+ *
+ * \return mesh object or NULL on error.
+ *
+ * \ingroup mesh
+ */
+Lib3dsMesh*
+lib3ds_mesh_new(const char *name)
+{
+ Lib3dsMesh *mesh;
+
+ ASSERT(name);
+ ASSERT(strlen(name)<64);
+
+ mesh=(Lib3dsMesh*)calloc(sizeof(Lib3dsMesh), 1);
+ if (!mesh) {
+ return(0);
+ }
+ strcpy(mesh->name, name);
+ lib3ds_matrix_identity(mesh->matrix);
+ mesh->map_data.maptype=LIB3DS_MAP_NONE;
+ return(mesh);
+}
+
+
+/*!
+ * Free a mesh object and all of its resources.
+ *
+ * \param mesh Mesh object to be freed.
+ *
+ * \ingroup mesh
+ */
+void
+lib3ds_mesh_free(Lib3dsMesh *mesh)
+{
+ lib3ds_mesh_free_point_list(mesh);
+ lib3ds_mesh_free_flag_list(mesh);
+ lib3ds_mesh_free_texel_list(mesh);
+ lib3ds_mesh_free_face_list(mesh);
+ memset(mesh, 0, sizeof(Lib3dsMesh));
+ free(mesh);
+}
+
+
+/*!
+ * Allocate point list in mesh object.
+ *
+ * This function frees the current point list, if any, and allocates
+ * a new one large enough to hold the specified number of points.
+ *
+ * \param mesh Mesh object for which points are to be allocated.
+ * \param points Number of points in the new point list.
+ *
+ * \return LIB3DS_TRUE on success, LIB3DS_FALSE on failure.
+ *
+ * \ingroup mesh
+ */
+Lib3dsBool
+lib3ds_mesh_new_point_list(Lib3dsMesh *mesh, Lib3dsDword points)
+{
+ ASSERT(mesh);
+ if (mesh->pointL) {
+ ASSERT(mesh->points);
+ lib3ds_mesh_free_point_list(mesh);
+ }
+ ASSERT(!mesh->pointL && !mesh->points);
+ mesh->points=0;
+ mesh->pointL=calloc(sizeof(Lib3dsPoint)*points,1);
+ if (!mesh->pointL) {
+ LIB3DS_ERROR_LOG;
+ return(LIB3DS_FALSE);
+ }
+ mesh->points=points;
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * Free point list in mesh object.
+ *
+ * The current point list is freed and set to NULL. mesh->points is
+ * set to zero.
+ *
+ * \param mesh Mesh object to be modified.
+ *
+ * \ingroup mesh
+ */
+void
+lib3ds_mesh_free_point_list(Lib3dsMesh *mesh)
+{
+ ASSERT(mesh);
+ if (mesh->pointL) {
+ ASSERT(mesh->points);
+ free(mesh->pointL);
+ mesh->pointL=0;
+ mesh->points=0;
+ }
+ else {
+ ASSERT(!mesh->points);
+ }
+}
+
+
+/*!
+ * Allocate flag list in mesh object.
+ *
+ * This function frees the current flag list, if any, and allocates
+ * a new one large enough to hold the specified number of flags.
+ * All flags are initialized to 0
+ *
+ * \param mesh Mesh object for which points are to be allocated.
+ * \param flags Number of flags in the new flag list.
+ *
+ * \return LIB3DS_TRUE on success, LIB3DS_FALSE on failure.
+ *
+ * \ingroup mesh
+ */
+Lib3dsBool
+lib3ds_mesh_new_flag_list(Lib3dsMesh *mesh, Lib3dsDword flags)
+{
+ ASSERT(mesh);
+ if (mesh->flagL) {
+ ASSERT(mesh->flags);
+ lib3ds_mesh_free_flag_list(mesh);
+ }
+ ASSERT(!mesh->flagL && !mesh->flags);
+ mesh->flags=0;
+ mesh->flagL=calloc(sizeof(Lib3dsWord)*flags,1);
+ if (!mesh->flagL) {
+ LIB3DS_ERROR_LOG;
+ return(LIB3DS_FALSE);
+ }
+ mesh->flags=flags;
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * Free flag list in mesh object.
+ *
+ * The current flag list is freed and set to NULL. mesh->flags is
+ * set to zero.
+ *
+ * \param mesh Mesh object to be modified.
+ *
+ * \ingroup mesh
+ */
+void
+lib3ds_mesh_free_flag_list(Lib3dsMesh *mesh)
+{
+ ASSERT(mesh);
+ if (mesh->flagL) {
+ ASSERT(mesh->flags);
+ free(mesh->flagL);
+ mesh->flagL=0;
+ mesh->flags=0;
+ }
+ else {
+ ASSERT(!mesh->flags);
+ }
+}
+
+
+/*!
+ * Allocate texel list in mesh object.
+ *
+ * This function frees the current texel list, if any, and allocates
+ * a new one large enough to hold the specified number of texels.
+ *
+ * \param mesh Mesh object for which points are to be allocated.
+ * \param texels Number of texels in the new texel list.
+ *
+ * \return LIB3DS_TRUE on success, LIB3DS_FALSE on failure.
+ *
+ * \ingroup mesh
+ */
+Lib3dsBool
+lib3ds_mesh_new_texel_list(Lib3dsMesh *mesh, Lib3dsDword texels)
+{
+ ASSERT(mesh);
+ if (mesh->texelL) {
+ ASSERT(mesh->texels);
+ lib3ds_mesh_free_texel_list(mesh);
+ }
+ ASSERT(!mesh->texelL && !mesh->texels);
+ mesh->texels=0;
+ mesh->texelL=calloc(sizeof(Lib3dsTexel)*texels,1);
+ if (!mesh->texelL) {
+ LIB3DS_ERROR_LOG;
+ return(LIB3DS_FALSE);
+ }
+ mesh->texels=texels;
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * Free texel list in mesh object.
+ *
+ * The current texel list is freed and set to NULL. mesh->texels is
+ * set to zero.
+ *
+ * \param mesh Mesh object to be modified.
+ *
+ * \ingroup mesh
+ */
+void
+lib3ds_mesh_free_texel_list(Lib3dsMesh *mesh)
+{
+ ASSERT(mesh);
+ if (mesh->texelL) {
+ ASSERT(mesh->texels);
+ free(mesh->texelL);
+ mesh->texelL=0;
+ mesh->texels=0;
+ }
+ else {
+ ASSERT(!mesh->texels);
+ }
+}
+
+
+/*!
+ * Allocate face list in mesh object.
+ *
+ * This function frees the current face list, if any, and allocates
+ * a new one large enough to hold the specified number of faces.
+ *
+ * \param mesh Mesh object for which points are to be allocated.
+ * \param faces Number of faces in the new face list.
+ *
+ * \return LIB3DS_TRUE on success, LIB3DS_FALSE on failure.
+ *
+ * \ingroup mesh
+ */
+Lib3dsBool
+lib3ds_mesh_new_face_list(Lib3dsMesh *mesh, Lib3dsDword faces)
+{
+ ASSERT(mesh);
+ if (mesh->faceL) {
+ ASSERT(mesh->faces);
+ lib3ds_mesh_free_face_list(mesh);
+ }
+ ASSERT(!mesh->faceL && !mesh->faces);
+ mesh->faces=0;
+ mesh->faceL=calloc(sizeof(Lib3dsFace)*faces,1);
+ if (!mesh->faceL) {
+ LIB3DS_ERROR_LOG;
+ return(LIB3DS_FALSE);
+ }
+ mesh->faces=faces;
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * Free face list in mesh object.
+ *
+ * The current face list is freed and set to NULL. mesh->faces is
+ * set to zero.
+ *
+ * \param mesh Mesh object to be modified.
+ *
+ * \ingroup mesh
+ */
+void
+lib3ds_mesh_free_face_list(Lib3dsMesh *mesh)
+{
+ ASSERT(mesh);
+ if (mesh->faceL) {
+ ASSERT(mesh->faces);
+ free(mesh->faceL);
+ mesh->faceL=0;
+ mesh->faces=0;
+ }
+ else {
+ ASSERT(!mesh->faces);
+ }
+}
+
+
+typedef struct _Lib3dsFaces Lib3dsFaces;
+
+struct _Lib3dsFaces {
+ Lib3dsFaces *next;
+ Lib3dsFace *face;
+};
+
+
+
+
+/*!
+ * Find the bounding box of a mesh object.
+ *
+ * \param mesh The mesh object
+ * \param min Returned bounding box
+ * \param max Returned bounding box
+ *
+ * \ingroup mesh
+ */
+void
+lib3ds_mesh_bounding_box(Lib3dsMesh *mesh, Lib3dsVector min, Lib3dsVector max)
+{
+ unsigned i,j;
+ Lib3dsFloat v;
+
+ if (!mesh->points) {
+ lib3ds_vector_zero(min);
+ lib3ds_vector_zero(max);
+ return;
+ }
+
+ lib3ds_vector_copy(min, mesh->pointL[0].pos);
+ lib3ds_vector_copy(max, mesh->pointL[0].pos);
+ for (i=1; i<mesh->points; ++i) {
+ for (j=0; j<3; ++j) {
+ v=mesh->pointL[i].pos[j];
+ if (v<min[j]) {
+ min[j]=v;
+ }
+ if (v>max[j]) {
+ max[j]=v;
+ }
+ }
+ };
+}
+
+
+/*!
+ * Calculates the vertex normals corresponding to the smoothing group
+ * settings for each face of a mesh.
+ *
+ * \param mesh A pointer to the mesh to calculate the normals for.
+ * \param normalL A pointer to a buffer to store the calculated
+ * normals. The buffer must have the size:
+ * 3*sizeof(Lib3dsVector)*mesh->faces.
+ *
+ * To allocate the normal buffer do for example the following:
+ * \code
+ * Lib3dsVector *normalL = malloc(3*sizeof(Lib3dsVector)*mesh->faces);
+ * \endcode
+ *
+ * To access the normal of the i-th vertex of the j-th face do the
+ * following:
+ * \code
+ * normalL[3*j+i]
+ * \endcode
+ *
+ * \ingroup mesh
+ */
+void
+lib3ds_mesh_calculate_normals(Lib3dsMesh *mesh, Lib3dsVector *normalL)
+{
+ Lib3dsFaces **fl;
+ Lib3dsFaces *fa;
+ unsigned i,j,k;
+
+ if (!mesh->faces) {
+ return;
+ }
+
+ fl=calloc(sizeof(Lib3dsFaces*),mesh->points);
+ ASSERT(fl);
+ fa=calloc(sizeof(Lib3dsFaces),3*mesh->faces);
+ ASSERT(fa);
+ k=0;
+ for (i=0; i<mesh->faces; ++i) {
+ Lib3dsFace *f=&mesh->faceL[i];
+ for (j=0; j<3; ++j) {
+ Lib3dsFaces* l=&fa[k++];
+ ASSERT(f->points[j]<mesh->points);
+ l->face=f;
+ l->next=fl[f->points[j]];
+ fl[f->points[j]]=l;
+ }
+ }
+
+ for (i=0; i<mesh->faces; ++i) {
+ Lib3dsFace *f=&mesh->faceL[i];
+ for (j=0; j<3; ++j) {
+ /* FIXME: static array needs at least check!! */
+ Lib3dsVector n,N[128];
+ Lib3dsFaces *p;
+ int k,l;
+ int found;
+
+ ASSERT(f->points[j]<mesh->points);
+
+ if (f->smoothing) {
+ lib3ds_vector_zero(n);
+ k=0;
+ for (p=fl[f->points[j]]; p; p=p->next) {
+ found=0;
+ for (l=0; l<k; ++l) {
+ if( l >= 128 )
+ printf("array N overflow: i=%d, j=%d, k=%d\n", i,j,k);
+ if (fabs(lib3ds_vector_dot(N[l], p->face->normal)-1.0)<1e-5) {
+ found=1;
+ break;
+ }
+ }
+ if (!found) {
+ if (f->smoothing & p->face->smoothing) {
+ lib3ds_vector_add(n,n, p->face->normal);
+ lib3ds_vector_copy(N[k], p->face->normal);
+ ++k;
+ }
+ }
+ }
+ }
+ else {
+ lib3ds_vector_copy(n, f->normal);
+ }
+ lib3ds_vector_normalize(n);
+
+ lib3ds_vector_copy(normalL[3*i+j], n);
+ }
+ }
+
+ free(fa);
+ free(fl);
+}
+
+
+/*!
+ * This function prints data associated with the specified mesh such as
+ * vertex and point lists.
+ *
+ * \param mesh Points to a mesh that you wish to view the data for.
+ *
+ * \return None
+ *
+ * \warning WIN32: Should only be used in a console window not in a GUI.
+ *
+ * \ingroup mesh
+ */
+void
+lib3ds_mesh_dump(Lib3dsMesh *mesh)
+{
+ unsigned i;
+ Lib3dsVector p;
+
+ ASSERT(mesh);
+ printf(" %s vertices=%ld faces=%ld\n",
+ mesh->name,
+ mesh->points,
+ mesh->faces
+ );
+ printf(" matrix:\n");
+ lib3ds_matrix_dump(mesh->matrix);
+ printf(" point list:\n");
+ for (i=0; i<mesh->points; ++i) {
+ lib3ds_vector_copy(p, mesh->pointL[i].pos);
+ printf (" %8f %8f %8f\n", p[0], p[1], p[2]);
+ }
+ printf(" facelist:\n");
+ for (i=0; i<mesh->faces; ++i) {
+ printf (" %4d %4d %4d smoothing:%X flags:%X material:\"%s\"\n",
+ mesh->faceL[i].points[0],
+ mesh->faceL[i].points[1],
+ mesh->faceL[i].points[2],
+ (unsigned)mesh->faceL[i].smoothing,
+ mesh->faceL[i].flags,
+ mesh->faceL[i].material
+ );
+ }
+}
+
+
+/*!
+ * \ingroup mesh
+ */
+Lib3dsBool
+lib3ds_mesh_read(Lib3dsMesh *mesh, Lib3dsIo *io)
+{
+ Lib3dsChunk c;
+ Lib3dsWord chunk;
+
+ if (!lib3ds_chunk_read_start(&c, LIB3DS_N_TRI_OBJECT, io)) {
+ return(LIB3DS_FALSE);
+ }
+
+ while ((chunk=lib3ds_chunk_read_next(&c, io))!=0) {
+ switch (chunk) {
+ case LIB3DS_MESH_MATRIX:
+ {
+ int i,j;
+
+ lib3ds_matrix_identity(mesh->matrix);
+ for (i=0; i<4; i++) {
+ for (j=0; j<3; j++) {
+ mesh->matrix[i][j]=lib3ds_io_read_float(io);
+ }
+ }
+ }
+ break;
+ case LIB3DS_MESH_COLOR:
+ {
+ mesh->color=lib3ds_io_read_byte(io);
+ }
+ break;
+ case LIB3DS_POINT_ARRAY:
+ {
+ unsigned i,j;
+ unsigned points;
+
+ lib3ds_mesh_free_point_list(mesh);
+ points=lib3ds_io_read_word(io);
+ if (points) {
+ if (!lib3ds_mesh_new_point_list(mesh, points)) {
+ LIB3DS_ERROR_LOG;
+ return(LIB3DS_FALSE);
+ }
+ for (i=0; i<mesh->points; ++i) {
+ for (j=0; j<3; ++j) {
+ mesh->pointL[i].pos[j]=lib3ds_io_read_float(io);
+ }
+ }
+ ASSERT((!mesh->flags) || (mesh->points==mesh->flags));
+ ASSERT((!mesh->texels) || (mesh->points==mesh->texels));
+ }
+ }
+ break;
+ case LIB3DS_POINT_FLAG_ARRAY:
+ {
+ unsigned i;
+ unsigned flags;
+
+ lib3ds_mesh_free_flag_list(mesh);
+ flags=lib3ds_io_read_word(io);
+ if (flags) {
+ if (!lib3ds_mesh_new_flag_list(mesh, flags)) {
+ LIB3DS_ERROR_LOG;
+ return(LIB3DS_FALSE);
+ }
+ for (i=0; i<mesh->flags; ++i) {
+ mesh->flagL[i]=lib3ds_io_read_word(io);
+ }
+ ASSERT((!mesh->points) || (mesh->flags==mesh->points));
+ ASSERT((!mesh->texels) || (mesh->flags==mesh->texels));
+ }
+ }
+ break;
+ case LIB3DS_FACE_ARRAY:
+ {
+ lib3ds_chunk_read_reset(&c, io);
+ if (!face_array_read(mesh, io)) {
+ return(LIB3DS_FALSE);
+ }
+ }
+ break;
+ case LIB3DS_MESH_TEXTURE_INFO:
+ {
+ int i,j;
+
+ for (i=0; i<2; ++i) {
+ mesh->map_data.tile[i]=lib3ds_io_read_float(io);
+ }
+ for (i=0; i<3; ++i) {
+ mesh->map_data.pos[i]=lib3ds_io_read_float(io);
+ }
+ mesh->map_data.scale=lib3ds_io_read_float(io);
+
+ lib3ds_matrix_identity(mesh->map_data.matrix);
+ for (i=0; i<4; i++) {
+ for (j=0; j<3; j++) {
+ mesh->map_data.matrix[i][j]=lib3ds_io_read_float(io);
+ }
+ }
+ for (i=0; i<2; ++i) {
+ mesh->map_data.planar_size[i]=lib3ds_io_read_float(io);
+ }
+ mesh->map_data.cylinder_height=lib3ds_io_read_float(io);
+ }
+ break;
+ case LIB3DS_TEX_VERTS:
+ {
+ unsigned i;
+ unsigned texels;
+
+ lib3ds_mesh_free_texel_list(mesh);
+ texels=lib3ds_io_read_word(io);
+ if (texels) {
+ if (!lib3ds_mesh_new_texel_list(mesh, texels)) {
+ LIB3DS_ERROR_LOG;
+ return(LIB3DS_FALSE);
+ }
+ for (i=0; i<mesh->texels; ++i) {
+ mesh->texelL[i][0]=lib3ds_io_read_float(io);
+ mesh->texelL[i][1]=lib3ds_io_read_float(io);
+ }
+ ASSERT((!mesh->points) || (mesh->texels==mesh->points));
+ ASSERT((!mesh->flags) || (mesh->texels==mesh->flags));
+ }
+ }
+ break;
+ default:
+ lib3ds_chunk_unknown(chunk);
+ }
+ }
+ {
+ unsigned j;
+
+ for (j=0; j<mesh->faces; ++j) {
+ ASSERT(mesh->faceL[j].points[0]<mesh->points);
+ ASSERT(mesh->faceL[j].points[1]<mesh->points);
+ ASSERT(mesh->faceL[j].points[2]<mesh->points);
+ lib3ds_vector_normal(
+ mesh->faceL[j].normal,
+ mesh->pointL[mesh->faceL[j].points[0]].pos,
+ mesh->pointL[mesh->faceL[j].points[1]].pos,
+ mesh->pointL[mesh->faceL[j].points[2]].pos
+ );
+ }
+ }
+
+ lib3ds_chunk_read_end(&c, io);
+ return(LIB3DS_TRUE);
+}
+
+
+static Lib3dsBool
+point_array_write(Lib3dsMesh *mesh, Lib3dsIo *io)
+{
+ Lib3dsChunk c;
+ unsigned i;
+
+ if (!mesh->points || !mesh->pointL) {
+ return(LIB3DS_TRUE);
+ }
+ ASSERT(mesh->points<0x10000);
+ c.chunk=LIB3DS_POINT_ARRAY;
+ c.size=8+12*mesh->points;
+ lib3ds_chunk_write(&c, io);
+
+ lib3ds_io_write_word(io, (Lib3dsWord)mesh->points);
+ for (i=0; i<mesh->points; ++i) {
+ lib3ds_io_write_vector(io, mesh->pointL[i].pos);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+static Lib3dsBool
+flag_array_write(Lib3dsMesh *mesh, Lib3dsIo *io)
+{
+ Lib3dsChunk c;
+ unsigned i;
+
+ if (!mesh->flags || !mesh->flagL) {
+ return(LIB3DS_TRUE);
+ }
+ ASSERT(mesh->flags<0x10000);
+ c.chunk=LIB3DS_POINT_FLAG_ARRAY;
+ c.size=8+2*mesh->flags;
+ lib3ds_chunk_write(&c, io);
+
+ lib3ds_io_write_word(io, (Lib3dsWord)mesh->flags);
+ for (i=0; i<mesh->flags; ++i) {
+ lib3ds_io_write_word(io, mesh->flagL[i]);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+static Lib3dsBool
+face_array_write(Lib3dsMesh *mesh, Lib3dsIo *io)
+{
+ Lib3dsChunk c;
+
+ if (!mesh->faces || !mesh->faceL) {
+ return(LIB3DS_TRUE);
+ }
+ ASSERT(mesh->faces<0x10000);
+ c.chunk=LIB3DS_FACE_ARRAY;
+ if (!lib3ds_chunk_write_start(&c, io)) {
+ return(LIB3DS_FALSE);
+ }
+ {
+ unsigned i;
+
+ lib3ds_io_write_word(io, (Lib3dsWord)mesh->faces);
+ for (i=0; i<mesh->faces; ++i) {
+ lib3ds_io_write_word(io, mesh->faceL[i].points[0]);
+ lib3ds_io_write_word(io, mesh->faceL[i].points[1]);
+ lib3ds_io_write_word(io, mesh->faceL[i].points[2]);
+ lib3ds_io_write_word(io, mesh->faceL[i].flags);
+ }
+ }
+
+ { /*---- MSH_MAT_GROUP ----*/
+ Lib3dsChunk c;
+ unsigned i,j;
+ Lib3dsWord num;
+ char *matf=calloc(sizeof(char), mesh->faces);
+ if (!matf) {
+ return(LIB3DS_FALSE);
+ }
+
+ for (i=0; i<mesh->faces; ++i) {
+ if (!matf[i] && strlen(mesh->faceL[i].material)) {
+ matf[i]=1;
+ num=1;
+
+ for (j=i+1; j<mesh->faces; ++j) {
+ if (strcmp(mesh->faceL[i].material, mesh->faceL[j].material)==0) ++num;
+ }
+
+ c.chunk=LIB3DS_MSH_MAT_GROUP;
+ c.size=6+ strlen(mesh->faceL[i].material)+1 +2+2*num;
+ lib3ds_chunk_write(&c, io);
+ lib3ds_io_write_string(io, mesh->faceL[i].material);
+ lib3ds_io_write_word(io, num);
+ lib3ds_io_write_word(io, (Lib3dsWord)i);
+
+ for (j=i+1; j<mesh->faces; ++j) {
+ if (strcmp(mesh->faceL[i].material, mesh->faceL[j].material)==0) {
+ lib3ds_io_write_word(io, (Lib3dsWord)j);
+ matf[j]=1;
+ }
+ }
+ }
+ }
+ free(matf);
+ }
+
+ { /*---- SMOOTH_GROUP ----*/
+ Lib3dsChunk c;
+ unsigned i;
+
+ c.chunk=LIB3DS_SMOOTH_GROUP;
+ c.size=6+4*mesh->faces;
+ lib3ds_chunk_write(&c, io);
+
+ for (i=0; i<mesh->faces; ++i) {
+ lib3ds_io_write_dword(io, mesh->faceL[i].smoothing);
+ }
+ }
+
+ { /*---- MSH_BOXMAP ----*/
+ Lib3dsChunk c;
+
+ if (strlen(mesh->box_map.front) ||
+ strlen(mesh->box_map.back) ||
+ strlen(mesh->box_map.left) ||
+ strlen(mesh->box_map.right) ||
+ strlen(mesh->box_map.top) ||
+ strlen(mesh->box_map.bottom)) {
+
+ c.chunk=LIB3DS_MSH_BOXMAP;
+ if (!lib3ds_chunk_write_start(&c, io)) {
+ return(LIB3DS_FALSE);
+ }
+
+ lib3ds_io_write_string(io, mesh->box_map.front);
+ lib3ds_io_write_string(io, mesh->box_map.back);
+ lib3ds_io_write_string(io, mesh->box_map.left);
+ lib3ds_io_write_string(io, mesh->box_map.right);
+ lib3ds_io_write_string(io, mesh->box_map.top);
+ lib3ds_io_write_string(io, mesh->box_map.bottom);
+
+ if (!lib3ds_chunk_write_end(&c, io)) {
+ return(LIB3DS_FALSE);
+ }
+ }
+ }
+
+ if (!lib3ds_chunk_write_end(&c, io)) {
+ return(LIB3DS_FALSE);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+static Lib3dsBool
+texel_array_write(Lib3dsMesh *mesh, Lib3dsIo *io)
+{
+ Lib3dsChunk c;
+ unsigned i;
+
+ if (!mesh->texels || !mesh->texelL) {
+ return(LIB3DS_TRUE);
+ }
+ ASSERT(mesh->texels<0x10000);
+ c.chunk=LIB3DS_TEX_VERTS;
+ c.size=8+8*mesh->texels;
+ lib3ds_chunk_write(&c, io);
+
+ lib3ds_io_write_word(io, (Lib3dsWord)mesh->texels);
+ for (i=0; i<mesh->texels; ++i) {
+ lib3ds_io_write_float(io, mesh->texelL[i][0]);
+ lib3ds_io_write_float(io, mesh->texelL[i][1]);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup mesh
+ */
+Lib3dsBool
+lib3ds_mesh_write(Lib3dsMesh *mesh, Lib3dsIo *io)
+{
+ Lib3dsChunk c;
+
+ c.chunk=LIB3DS_N_TRI_OBJECT;
+ if (!lib3ds_chunk_write_start(&c,io)) {
+ return(LIB3DS_FALSE);
+ }
+ if (!point_array_write(mesh, io)) {
+ return(LIB3DS_FALSE);
+ }
+ if (!texel_array_write(mesh, io)) {
+ return(LIB3DS_FALSE);
+ }
+
+ if (mesh->map_data.maptype!=LIB3DS_MAP_NONE) { /*---- LIB3DS_MESH_TEXTURE_INFO ----*/
+ Lib3dsChunk c;
+ int i,j;
+
+ c.chunk=LIB3DS_MESH_TEXTURE_INFO;
+ c.size=92;
+ if (!lib3ds_chunk_write(&c,io)) {
+ return(LIB3DS_FALSE);
+ }
+
+ lib3ds_io_write_word(io, mesh->map_data.maptype);
+
+ for (i=0; i<2; ++i) {
+ lib3ds_io_write_float(io, mesh->map_data.tile[i]);
+ }
+ for (i=0; i<3; ++i) {
+ lib3ds_io_write_float(io, mesh->map_data.pos[i]);
+ }
+ lib3ds_io_write_float(io, mesh->map_data.scale);
+
+ for (i=0; i<4; i++) {
+ for (j=0; j<3; j++) {
+ lib3ds_io_write_float(io, mesh->map_data.matrix[i][j]);
+ }
+ }
+ for (i=0; i<2; ++i) {
+ lib3ds_io_write_float(io, mesh->map_data.planar_size[i]);
+ }
+ lib3ds_io_write_float(io, mesh->map_data.cylinder_height);
+ }
+
+ if (!flag_array_write(mesh, io)) {
+ return(LIB3DS_FALSE);
+ }
+ { /*---- LIB3DS_MESH_MATRIX ----*/
+ Lib3dsChunk c;
+ int i,j;
+
+ c.chunk=LIB3DS_MESH_MATRIX;
+ c.size=54;
+ if (!lib3ds_chunk_write(&c,io)) {
+ return(LIB3DS_FALSE);
+ }
+ for (i=0; i<4; i++) {
+ for (j=0; j<3; j++) {
+ lib3ds_io_write_float(io, mesh->matrix[i][j]);
+ }
+ }
+ }
+
+ if (mesh->color) { /*---- LIB3DS_MESH_COLOR ----*/
+ Lib3dsChunk c;
+
+ c.chunk=LIB3DS_MESH_COLOR;
+ c.size=7;
+ if (!lib3ds_chunk_write(&c,io)) {
+ return(LIB3DS_FALSE);
+ }
+ lib3ds_io_write_byte(io, mesh->color);
+ }
+ if (!face_array_write(mesh, io)) {
+ return(LIB3DS_FALSE);
+ }
+
+ if (!lib3ds_chunk_write_end(&c,io)) {
+ return(LIB3DS_FALSE);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+
+\typedef Lib3dsFace
+ \ingroup mesh
+ \sa _Lib3dsFace
+
+*/
+/*!
+
+\typedef Lib3dsBoxMap
+ \ingroup mesh
+ \sa _Lib3dsBoxMap
+
+*/
+/*!
+
+\typedef Lib3dsMapData
+ \ingroup mesh
+ \sa _Lib3dsMapData
+
+*/
+/*!
+
+\typedef Lib3dsMesh
+ \ingroup mesh
+ \sa _Lib3dsMesh
+
+*/
projects / summerhack / blobdiff