src/tileanimation.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2016 sfan5 <sfan5@live.de>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19 #include "tileanimation.h"
  20 #include "util/serialize.h"
  21
  22 void TileAnimationParams::serialize(std::ostream &os, u8 tiledef_version) const
  23 {
  24         writeU8(os, type);
  25         if (type == TAT_VERTICAL_FRAMES) {
  26                 writeU16(os, vertical_frames.aspect_w);
  27                 writeU16(os, vertical_frames.aspect_h);
  28                 writeF32(os, vertical_frames.length);
  29         } else if (type == TAT_SHEET_2D) {
  30                 writeU8(os, sheet_2d.frames_w);
  31                 writeU8(os, sheet_2d.frames_h);
  32                 writeF32(os, sheet_2d.frame_length);
  33         }
  34 }
  35
  36 void TileAnimationParams::deSerialize(std::istream &is, u8 tiledef_version)
  37 {
  38         type = (TileAnimationType) readU8(is);
  39
  40         if (type == TAT_VERTICAL_FRAMES) {
  41                 vertical_frames.aspect_w = readU16(is);
  42                 vertical_frames.aspect_h = readU16(is);
  43                 vertical_frames.length = readF32(is);
  44         } else if (type == TAT_SHEET_2D) {
  45                 sheet_2d.frames_w = readU8(is);
  46                 sheet_2d.frames_h = readU8(is);
  47                 sheet_2d.frame_length = readF32(is);
  48         }
  49 }
  50
  51 void TileAnimationParams::determineParams(v2u32 texture_size, int *frame_count,
  52                 int *frame_length_ms, v2u32 *frame_size) const
  53 {
  54         if (type == TAT_VERTICAL_FRAMES) {
  55                 int frame_height = (float)texture_size.X /
  56                                 (float)vertical_frames.aspect_w *
  57                                 (float)vertical_frames.aspect_h;
  58                 int _frame_count = texture_size.Y / frame_height;
  59                 if (frame_count)
  60                         *frame_count = _frame_count;
  61                 if (frame_length_ms)
  62                         *frame_length_ms = 1000.0 * vertical_frames.length / _frame_count;
  63                 if (frame_size)
  64                         *frame_size = v2u32(texture_size.X, frame_height);
  65         } else if (type == TAT_SHEET_2D) {
  66                 if (frame_count)
  67                         *frame_count = sheet_2d.frames_w * sheet_2d.frames_h;
  68                 if (frame_length_ms)
  69                         *frame_length_ms = 1000 * sheet_2d.frame_length;
  70                 if (frame_size)
  71                         *frame_size = v2u32(texture_size.X / sheet_2d.frames_w, texture_size.Y / sheet_2d.frames_h);
  72         }
  73         // caller should check for TAT_NONE
  74 }
  75
  76 void TileAnimationParams::getTextureModifer(std::ostream &os, v2u32 texture_size, int frame) const
  77 {
  78         if (type == TAT_NONE)
  79                 return;
  80         if (type == TAT_VERTICAL_FRAMES) {
  81                 int frame_count;
  82                 determineParams(texture_size, &frame_count, NULL, NULL);
  83                 os << "^[verticalframe:" << frame_count << ":" << frame;
  84         } else if (type == TAT_SHEET_2D) {
  85                 int q, r;
  86                 q = frame / sheet_2d.frames_w;
  87                 r = frame % sheet_2d.frames_w;
  88                 os << "^[sheet:" << sheet_2d.frames_w << "x" << sheet_2d.frames_h
  89                         << ":" << r << "," << q;
  90         }
  91 }
  92
  93 v2f TileAnimationParams::getTextureCoords(v2u32 texture_size, int frame) const
  94 {
  95         v2u32 ret(0, 0);
  96         if (type == TAT_VERTICAL_FRAMES) {
  97                 int frame_height = (float)texture_size.X /
  98                                 (float)vertical_frames.aspect_w *
  99                                 (float)vertical_frames.aspect_h;
 100                 ret = v2u32(0, frame_height * frame);
 101         } else if (type == TAT_SHEET_2D) {
 102                 v2u32 frame_size;
 103                 determineParams(texture_size, NULL, NULL, &frame_size);
 104                 int q, r;
 105                 q = frame / sheet_2d.frames_w;
 106                 r = frame % sheet_2d.frames_w;
 107                 ret = v2u32(r * frame_size.X, q * frame_size.Y);
 108         }
 109         return v2f(ret.X / (float) texture_size.X, ret.Y / (float) texture_size.Y);
 110 }