void
lib3ds_mesh_read(Lib3dsFile *file, Lib3dsMesh *mesh, Lib3dsIo *io) {
Lib3dsChunk c;
uint16_t chunk;
lib3ds_chunk_read_start(&c, CHK_N_TRI_OBJECT, io);
while ((chunk = lib3ds_chunk_read_next(&c, io)) != 0) {
switch (chunk) {
case CHK_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 CHK_MESH_COLOR: {
mesh->color = lib3ds_io_read_byte(io);
break;
}
case CHK_POINT_ARRAY: {
int i;
uint16_t nvertices = lib3ds_io_read_word(io);
lib3ds_mesh_resize_vertices(mesh, nvertices, mesh->texcos != NULL, mesh->vflags != NULL);
for (i = 0; i < mesh->nvertices; ++i) {
lib3ds_io_read_vector(io, mesh->vertices[i]);
}
break;
}
case CHK_POINT_FLAG_ARRAY: {
int i;
uint16_t nflags = lib3ds_io_read_word(io);
uint16_t nvertices = (mesh->nvertices >= nflags)? mesh->nvertices : nflags;
lib3ds_mesh_resize_vertices(mesh, nvertices, mesh->texcos != NULL, 1);
for (i = 0; i < nflags; ++i) {
mesh->vflags[i] = lib3ds_io_read_word(io);
}
break;
}
case CHK_FACE_ARRAY: {
lib3ds_chunk_read_reset(&c, io);
face_array_read(file, mesh, io);
break;
}
case CHK_MESH_TEXTURE_INFO: {
int i, j;
//FIXME: mesh->map_type = lib3ds_io_read_word(io);
for (i = 0; i < 2; ++i) {
mesh->map_tile[i] = lib3ds_io_read_float(io);
}
for (i = 0; i < 3; ++i) {
mesh->map_pos[i] = lib3ds_io_read_float(io);
}
mesh->map_scale = lib3ds_io_read_float(io);
lib3ds_matrix_identity(mesh->map_matrix);
for (i = 0; i < 4; i++) {
for (j = 0; j < 3; j++) {
mesh->map_matrix[i][j] = lib3ds_io_read_float(io);
}
}
for (i = 0; i < 2; ++i) {
mesh->map_planar_size[i] = lib3ds_io_read_float(io);
}
mesh->map_cylinder_height = lib3ds_io_read_float(io);
break;
}
case CHK_TEX_VERTS: {
int i;
uint16_t ntexcos = lib3ds_io_read_word(io);
uint16_t nvertices = (mesh->nvertices >= ntexcos)? mesh->nvertices : ntexcos;;
if (!mesh->texcos) {
lib3ds_mesh_resize_vertices(mesh, nvertices, 1, mesh->vflags != NULL);
}
for (i = 0; i < ntexcos; ++i) {
mesh->texcos[i][0] = lib3ds_io_read_float(io);
mesh->texcos[i][1] = lib3ds_io_read_float(io);
}
break;
}
default:
lib3ds_chunk_unknown(chunk, io);
}
}
if (lib3ds_matrix_det(mesh->matrix) < 0.0) {
/* Flip X coordinate of vertices if mesh matrix
has negative determinant */
float inv_matrix[4][4], M[4][4];
float tmp[3];
int i;
lib3ds_matrix_copy(inv_matrix, mesh->matrix);
lib3ds_matrix_inv(inv_matrix);
lib3ds_matrix_copy(M, mesh->matrix);
lib3ds_matrix_scale(M, -1.0f, 1.0f, 1.0f);
lib3ds_matrix_mult(M, M, inv_matrix);
for (i = 0; i < mesh->nvertices; ++i) {
lib3ds_vector_transform(tmp, M, mesh->vertices[i]);
lib3ds_vector_copy(mesh->vertices[i], tmp);
}
}
lib3ds_chunk_read_end(&c, io);
}
/*!
* \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
);
}
}
if (lib3ds_matrix_det(mesh->matrix) < 0.0)
{
/* Flip X coordinate of vertices if mesh matrix
has negative determinant */
Lib3dsMatrix inv_matrix, M;
Lib3dsVector tmp;
unsigned i;
lib3ds_matrix_copy(inv_matrix, mesh->matrix);
lib3ds_matrix_inv(inv_matrix);
lib3ds_matrix_copy(M, mesh->matrix);
lib3ds_matrix_scale_xyz(M, -1.0f, 1.0f, 1.0f);
lib3ds_matrix_mult(M, inv_matrix);
for (i=0; i<mesh->points; ++i) {
lib3ds_vector_transform(tmp, M, mesh->pointL[i].pos);
lib3ds_vector_copy(mesh->pointL[i].pos, tmp);
}
}
lib3ds_chunk_read_end(&c, io);
return(LIB3DS_TRUE);
}
