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124 lines
4.1 KiB
C++
124 lines
4.1 KiB
C++
/*
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Minetest
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Copyright (C) 2016 sfan5 <sfan5@live.de>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "tileanimation.h"
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#include "util/serialize.h"
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void TileAnimationParams::serialize(std::ostream &os, u16 protocol_ver) const
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{
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// The particle code overloads the length parameter so that negative numbers
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// indicate an extra feature which old clients don't understand (crash).
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// In hindsight it would have been better to use an extra parameter for this
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// but we're stuck with this now.
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const bool need_abs = protocol_ver < 40;
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writeU8(os, type);
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if (type == TAT_VERTICAL_FRAMES) {
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writeU16(os, vertical_frames.aspect_w);
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writeU16(os, vertical_frames.aspect_h);
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writeF32(os, need_abs ? std::abs(vertical_frames.length) : vertical_frames.length);
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} else if (type == TAT_SHEET_2D) {
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writeU8(os, sheet_2d.frames_w);
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writeU8(os, sheet_2d.frames_h);
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writeF32(os, need_abs ? std::abs(sheet_2d.frame_length) : sheet_2d.frame_length);
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}
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}
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void TileAnimationParams::deSerialize(std::istream &is, u16 protocol_ver)
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{
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type = static_cast<TileAnimationType>(readU8(is));
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switch(type) {
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case TAT_NONE:
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break;
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case TAT_VERTICAL_FRAMES:
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vertical_frames.aspect_w = readU16(is);
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vertical_frames.aspect_h = readU16(is);
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vertical_frames.length = readF32(is);
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break;
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case TAT_SHEET_2D:
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sheet_2d.frames_w = readU8(is);
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sheet_2d.frames_h = readU8(is);
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sheet_2d.frame_length = readF32(is);
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break;
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default:
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type = TAT_NONE;
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break;
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}
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}
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void TileAnimationParams::determineParams(v2u32 texture_size, int *frame_count,
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int *frame_length_ms, v2u32 *frame_size) const
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{
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if (type == TAT_VERTICAL_FRAMES) {
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int frame_height = (float)texture_size.X /
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(float)vertical_frames.aspect_w *
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(float)vertical_frames.aspect_h;
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int _frame_count = texture_size.Y / frame_height;
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if (frame_count)
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*frame_count = _frame_count;
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if (frame_length_ms)
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*frame_length_ms = 1000.0 * vertical_frames.length / _frame_count;
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if (frame_size)
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*frame_size = v2u32(texture_size.X, frame_height);
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} else if (type == TAT_SHEET_2D) {
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if (frame_count)
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*frame_count = sheet_2d.frames_w * sheet_2d.frames_h;
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if (frame_length_ms)
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*frame_length_ms = 1000 * sheet_2d.frame_length;
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if (frame_size)
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*frame_size = v2u32(texture_size.X / sheet_2d.frames_w, texture_size.Y / sheet_2d.frames_h);
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}
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// caller should check for TAT_NONE
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}
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void TileAnimationParams::getTextureModifer(std::ostream &os, v2u32 texture_size, int frame) const
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{
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if (type == TAT_NONE)
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return;
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if (type == TAT_VERTICAL_FRAMES) {
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int frame_count;
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determineParams(texture_size, &frame_count, NULL, NULL);
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os << "^[verticalframe:" << frame_count << ":" << frame;
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} else if (type == TAT_SHEET_2D) {
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int q, r;
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q = frame / sheet_2d.frames_w;
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r = frame % sheet_2d.frames_w;
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os << "^[sheet:" << sheet_2d.frames_w << "x" << sheet_2d.frames_h
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<< ":" << r << "," << q;
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}
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}
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v2f TileAnimationParams::getTextureCoords(v2u32 texture_size, int frame) const
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{
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v2u32 ret(0, 0);
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if (type == TAT_VERTICAL_FRAMES) {
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int frame_height = (float)texture_size.X /
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(float)vertical_frames.aspect_w *
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(float)vertical_frames.aspect_h;
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ret = v2u32(0, frame_height * frame);
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} else if (type == TAT_SHEET_2D) {
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v2u32 frame_size;
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determineParams(texture_size, NULL, NULL, &frame_size);
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int q, r;
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q = frame / sheet_2d.frames_w;
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r = frame % sheet_2d.frames_w;
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ret = v2u32(r * frame_size.X, q * frame_size.Y);
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}
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return v2f(ret.X / (float) texture_size.X, ret.Y / (float) texture_size.Y);
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}
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