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, u16 protocol_ver) const
  23 {
  24         // The particle code overloads the length parameter so that negative numbers
  25         // indicate an extra feature which old clients don't understand (crash).
  26         // In hindsight it would have been better to use an extra parameter for this
  27         // but we're stuck with this now.
  28         const bool need_abs = protocol_ver < 40;
  29
  30         writeU8(os, type);
  31         if (type == TAT_VERTICAL_FRAMES) {
  32                 writeU16(os, vertical_frames.aspect_w);
  33                 writeU16(os, vertical_frames.aspect_h);
  34                 writeF32(os, need_abs ? fabs(vertical_frames.length) : vertical_frames.length);
  35         } else if (type == TAT_SHEET_2D) {
  36                 writeU8(os, sheet_2d.frames_w);
  37                 writeU8(os, sheet_2d.frames_h);
  38                 writeF32(os, need_abs ? fabs(sheet_2d.frame_length) : sheet_2d.frame_length);
  39         }
  40 }
  41
  42 void TileAnimationParams::deSerialize(std::istream &is, u16 protocol_ver)
  43 {
  44         type = (TileAnimationType) readU8(is);
  45
  46         if (type == TAT_VERTICAL_FRAMES) {
  47                 vertical_frames.aspect_w = readU16(is);
  48                 vertical_frames.aspect_h = readU16(is);
  49                 vertical_frames.length = readF32(is);
  50         } else if (type == TAT_SHEET_2D) {
  51                 sheet_2d.frames_w = readU8(is);
  52                 sheet_2d.frames_h = readU8(is);
  53                 sheet_2d.frame_length = readF32(is);
  54         }
  55 }
  56
  57 void TileAnimationParams::determineParams(v2u32 texture_size, int *frame_count,
  58                 int *frame_length_ms, v2u32 *frame_size) const
  59 {
  60         if (type == TAT_VERTICAL_FRAMES) {
  61                 int frame_height = (float)texture_size.X /
  62                                 (float)vertical_frames.aspect_w *
  63                                 (float)vertical_frames.aspect_h;
  64                 int _frame_count = texture_size.Y / frame_height;
  65                 if (frame_count)
  66                         *frame_count = _frame_count;
  67                 if (frame_length_ms)
  68                         *frame_length_ms = 1000.0 * vertical_frames.length / _frame_count;
  69                 if (frame_size)
  70                         *frame_size = v2u32(texture_size.X, frame_height);
  71         } else if (type == TAT_SHEET_2D) {
  72                 if (frame_count)
  73                         *frame_count = sheet_2d.frames_w * sheet_2d.frames_h;
  74                 if (frame_length_ms)
  75                         *frame_length_ms = 1000 * sheet_2d.frame_length;
  76                 if (frame_size)
  77                         *frame_size = v2u32(texture_size.X / sheet_2d.frames_w, texture_size.Y / sheet_2d.frames_h);
  78         }
  79         // caller should check for TAT_NONE
  80 }
  81
  82 void TileAnimationParams::getTextureModifer(std::ostream &os, v2u32 texture_size, int frame) const
  83 {
  84         if (type == TAT_NONE)
  85                 return;
  86         if (type == TAT_VERTICAL_FRAMES) {
  87                 int frame_count;
  88                 determineParams(texture_size, &frame_count, NULL, NULL);
  89                 os << "^[verticalframe:" << frame_count << ":" << frame;
  90         } else if (type == TAT_SHEET_2D) {
  91                 int q, r;
  92                 q = frame / sheet_2d.frames_w;
  93                 r = frame % sheet_2d.frames_w;
  94                 os << "^[sheet:" << sheet_2d.frames_w << "x" << sheet_2d.frames_h
  95                         << ":" << r << "," << q;
  96         }
  97 }
  98
  99 v2f TileAnimationParams::getTextureCoords(v2u32 texture_size, int frame) const
 100 {
 101         v2u32 ret(0, 0);
 102         if (type == TAT_VERTICAL_FRAMES) {
 103                 int frame_height = (float)texture_size.X /
 104                                 (float)vertical_frames.aspect_w *
 105                                 (float)vertical_frames.aspect_h;
 106                 ret = v2u32(0, frame_height * frame);
 107         } else if (type == TAT_SHEET_2D) {
 108                 v2u32 frame_size;
 109                 determineParams(texture_size, NULL, NULL, &frame_size);
 110                 int q, r;
 111                 q = frame / sheet_2d.frames_w;
 112                 r = frame % sheet_2d.frames_w;
 113                 ret = v2u32(r * frame_size.X, q * frame_size.Y);
 114         }
 115         return v2f(ret.X / (float) texture_size.X, ret.Y / (float) texture_size.Y);
 116 }