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@@ -19,21 +19,27 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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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_version) const
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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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+
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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, vertical_frames.length);
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+ writeF32(os, need_abs ? fabs(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, sheet_2d.frame_length);
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+ writeF32(os, need_abs ? fabs(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_version)
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+void TileAnimationParams::deSerialize(std::istream &is, u16 protocol_ver)
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{
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type = (TileAnimationType) readU8(is);
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