lib3ds_viewport.c

Go to the documentation of this file.

/*
    Copyright (C) 1996-2008 by Jan Eric Kyprianidis <www.kyprianidis.com>
    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.

    Thisprogram  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, see <http://www.gnu.org/licenses/>. 
*/
#include "lib3ds_impl.h"


void
lib3ds_viewport_read(Lib3dsViewport *viewport, Lib3dsIo *io) {
    Lib3dsChunk c;
    uint16_t chunk;

    memset(viewport, 0, sizeof(*viewport));
    lib3ds_chunk_read_start(&c, 0, io);
    switch (c.chunk) {
        case CHK_VIEWPORT_LAYOUT: {
            int cur = 0;
            viewport->layout_style = lib3ds_io_read_word(io);
            viewport->layout_active = lib3ds_io_read_intw(io);
            lib3ds_io_read_intw(io);
            viewport->layout_swap = lib3ds_io_read_intw(io);
            lib3ds_io_read_intw(io);
            viewport->layout_swap_prior = lib3ds_io_read_intw(io);
            viewport->layout_swap_view = lib3ds_io_read_intw(io);
            lib3ds_chunk_read_tell(&c, io);
            while ((chunk = lib3ds_chunk_read_next(&c, io)) != 0) {
                switch (chunk) {
                    case CHK_VIEWPORT_SIZE: {
                        viewport->layout_position[0] = lib3ds_io_read_word(io);
                        viewport->layout_position[1] = lib3ds_io_read_word(io);
                        viewport->layout_size[0] = lib3ds_io_read_word(io);
                        viewport->layout_size[1] = lib3ds_io_read_word(io);
                        break;
                    }

                    case CHK_VIEWPORT_DATA_3: {
                        if (cur < LIB3DS_LAYOUT_MAX_VIEWS) {
                            lib3ds_io_read_intw(io);
                            viewport->layout_views[cur].axis_lock = lib3ds_io_read_word(io);
                            viewport->layout_views[cur].position[0] = lib3ds_io_read_intw(io);
                            viewport->layout_views[cur].position[1] = lib3ds_io_read_intw(io);
                            viewport->layout_views[cur].size[0] = lib3ds_io_read_intw(io);
                            viewport->layout_views[cur].size[1] = lib3ds_io_read_intw(io);
                            viewport->layout_views[cur].type = lib3ds_io_read_word(io);
                            viewport->layout_views[cur].zoom = lib3ds_io_read_float(io);
                            lib3ds_io_read_vector(io, viewport->layout_views[cur].center);
                            viewport->layout_views[cur].horiz_angle = lib3ds_io_read_float(io);
                            viewport->layout_views[cur].vert_angle = lib3ds_io_read_float(io);
                            lib3ds_io_read(io, viewport->layout_views[cur].camera, 11);
                            ++cur;
                        }
                        break;
                    }

                    case CHK_VIEWPORT_DATA:
                        /* 3DS R2 & R3 chunk unsupported */
                        break;

                    default:
                        lib3ds_chunk_unknown(chunk, io);
                }
            }
            break;
        }

        case CHK_DEFAULT_VIEW: {
            while ((chunk = lib3ds_chunk_read_next(&c, io)) != 0) {
                switch (chunk) {
                    case CHK_VIEW_TOP: {
                        viewport->default_type = LIB3DS_VIEW_TOP;
                        lib3ds_io_read_vector(io, viewport->default_position);
                        viewport->default_width = lib3ds_io_read_float(io);
                        break;
                    }

                    case CHK_VIEW_BOTTOM: {
                        viewport->default_type = LIB3DS_VIEW_BOTTOM;
                        lib3ds_io_read_vector(io, viewport->default_position);
                        viewport->default_width = lib3ds_io_read_float(io);
                        break;
                    }

                    case CHK_VIEW_LEFT: {
                        viewport->default_type = LIB3DS_VIEW_LEFT;
                        lib3ds_io_read_vector(io, viewport->default_position);
                        viewport->default_width = lib3ds_io_read_float(io);
                        break;
                    }

                    case CHK_VIEW_RIGHT: {
                        viewport->default_type = LIB3DS_VIEW_RIGHT;
                        lib3ds_io_read_vector(io, viewport->default_position);
                        viewport->default_width = lib3ds_io_read_float(io);
                        break;
                    }

                    case CHK_VIEW_FRONT: {
                        viewport->default_type = LIB3DS_VIEW_FRONT;
                        lib3ds_io_read_vector(io, viewport->default_position);
                        viewport->default_width = lib3ds_io_read_float(io);
                        break;
                    }

                    case CHK_VIEW_BACK: {
                        viewport->default_type = LIB3DS_VIEW_BACK;
                        lib3ds_io_read_vector(io, viewport->default_position);
                        viewport->default_width = lib3ds_io_read_float(io);
                        break;
                    }

                    case CHK_VIEW_USER: {
                        viewport->default_type = LIB3DS_VIEW_USER;
                        lib3ds_io_read_vector(io, viewport->default_position);
                        viewport->default_width = lib3ds_io_read_float(io);
                        viewport->default_horiz_angle = lib3ds_io_read_float(io);
                        viewport->default_vert_angle = lib3ds_io_read_float(io);
                        viewport->default_roll_angle = lib3ds_io_read_float(io);
                        break;
                    }

                    case CHK_VIEW_CAMERA: {
                        viewport->default_type = LIB3DS_VIEW_CAMERA;
                        lib3ds_io_read(io, viewport->default_camera, 11);
                        break;
                    }

                    default:
                        lib3ds_chunk_unknown(chunk, io);
                }
            }
            break;
        }
    }

    lib3ds_chunk_read_end(&c, io);
}


void
lib3ds_viewport_write(Lib3dsViewport *viewport, Lib3dsIo *io) {
    if (viewport->layout_nviews) {
        Lib3dsChunk c;
        int i;

        c.chunk = CHK_VIEWPORT_LAYOUT;
        lib3ds_chunk_write_start(&c, io);

        lib3ds_io_write_word(io, viewport->layout_style);
        lib3ds_io_write_intw(io, viewport->layout_active);
        lib3ds_io_write_intw(io, 0);
        lib3ds_io_write_intw(io, viewport->layout_swap);
        lib3ds_io_write_intw(io, 0);
        lib3ds_io_write_intw(io, viewport->layout_swap_prior);
        lib3ds_io_write_intw(io, viewport->layout_swap_view);

        {
            Lib3dsChunk c;
            c.chunk = CHK_VIEWPORT_SIZE;
            c.size = 14;
            lib3ds_chunk_write(&c, io);
            lib3ds_io_write_intw(io, viewport->layout_position[0]);
            lib3ds_io_write_intw(io, viewport->layout_position[1]);
            lib3ds_io_write_intw(io, viewport->layout_size[0]);
            lib3ds_io_write_intw(io, viewport->layout_size[1]);
        }

        for (i = 0; i < viewport->layout_nviews; ++i) {
            Lib3dsChunk c;
            c.chunk = CHK_VIEWPORT_DATA_3;
            c.size = 55;
            lib3ds_chunk_write(&c, io);

            lib3ds_io_write_intw(io, 0);
            lib3ds_io_write_word(io, viewport->layout_views[i].axis_lock);
            lib3ds_io_write_intw(io, viewport->layout_views[i].position[0]);
            lib3ds_io_write_intw(io, viewport->layout_views[i].position[1]);
            lib3ds_io_write_intw(io, viewport->layout_views[i].size[0]);
            lib3ds_io_write_intw(io, viewport->layout_views[i].size[1]);
            lib3ds_io_write_word(io, viewport->layout_views[i].type);
            lib3ds_io_write_float(io, viewport->layout_views[i].zoom);
            lib3ds_io_write_vector(io, viewport->layout_views[i].center);
            lib3ds_io_write_float(io, viewport->layout_views[i].horiz_angle);
            lib3ds_io_write_float(io, viewport->layout_views[i].vert_angle);
            lib3ds_io_write(io, viewport->layout_views[i].camera, 11);
        }

        lib3ds_chunk_write_end(&c, io);
    }

    if (viewport->default_type) {
        Lib3dsChunk c;

        c.chunk = CHK_DEFAULT_VIEW;
        lib3ds_chunk_write_start(&c, io);

        switch (viewport->default_type) {
            case LIB3DS_VIEW_TOP: {
                Lib3dsChunk c;
                c.chunk = CHK_VIEW_TOP;
                c.size = 22;
                lib3ds_chunk_write(&c, io);
                lib3ds_io_write_vector(io, viewport->default_position);
                lib3ds_io_write_float(io, viewport->default_width);
                break;
            }

            case LIB3DS_VIEW_BOTTOM: {
                Lib3dsChunk c;
                c.chunk = CHK_VIEW_BOTTOM;
                c.size = 22;
                lib3ds_chunk_write(&c, io);
                lib3ds_io_write_vector(io, viewport->default_position);
                lib3ds_io_write_float(io, viewport->default_width);
                break;
            }

            case LIB3DS_VIEW_LEFT: {
                Lib3dsChunk c;
                c.chunk = CHK_VIEW_LEFT;
                c.size = 22;
                lib3ds_chunk_write(&c, io);
                lib3ds_io_write_vector(io, viewport->default_position);
                lib3ds_io_write_float(io, viewport->default_width);
                break;
            }

            case LIB3DS_VIEW_RIGHT: {
                Lib3dsChunk c;
                c.chunk = CHK_VIEW_RIGHT;
                c.size = 22;
                lib3ds_chunk_write(&c, io);
                lib3ds_io_write_vector(io, viewport->default_position);
                lib3ds_io_write_float(io, viewport->default_width);
                break;
            }

            case LIB3DS_VIEW_FRONT: {
                Lib3dsChunk c;
                c.chunk = CHK_VIEW_FRONT;
                c.size = 22;
                lib3ds_chunk_write(&c, io);
                lib3ds_io_write_vector(io, viewport->default_position);
                lib3ds_io_write_float(io, viewport->default_width);
                break;
            }

            case LIB3DS_VIEW_BACK: {
                Lib3dsChunk c;
                c.chunk = CHK_VIEW_BACK;
                c.size = 22;
                lib3ds_chunk_write(&c, io);
                lib3ds_io_write_vector(io, viewport->default_position);
                lib3ds_io_write_float(io, viewport->default_width);
                break;
            }

            case LIB3DS_VIEW_USER: {
                Lib3dsChunk c;
                c.chunk = CHK_VIEW_USER;
                c.size = 34;
                lib3ds_chunk_write(&c, io);
                lib3ds_io_write_vector(io, viewport->default_position);
                lib3ds_io_write_float(io, viewport->default_width);
                lib3ds_io_write_float(io, viewport->default_horiz_angle);
                lib3ds_io_write_float(io, viewport->default_vert_angle);
                lib3ds_io_write_float(io, viewport->default_roll_angle);
                break;
            }

            case LIB3DS_VIEW_CAMERA: {
                Lib3dsChunk c;
                c.chunk = CHK_VIEW_CAMERA;
                c.size = 17;
                lib3ds_chunk_write(&c, io);
                lib3ds_io_write(io, viewport->default_camera, 11);
                break;
            }
        }

        lib3ds_chunk_write_end(&c, io);
    }
}