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/*
Minetest
Copyright (C) 2020 sfan5 <sfan5@live.de>
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.
This program 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "particles.h"
#include <type_traits>
using namespace ParticleParamTypes;
#define PARAM_PVFN(n) ParticleParamTypes::n##ParameterValue
v2f PARAM_PVFN(pick) (float* f, const v2f a, const v2f b) {
return v2f(
numericalBlend(f[0], a.X, b.X),
numericalBlend(f[1], a.Y, b.Y)
);
}
v3f PARAM_PVFN(pick) (float* f, const v3f a, const v3f b) {
return v3f(
numericalBlend(f[0], a.X, b.X),
numericalBlend(f[1], a.Y, b.Y),
numericalBlend(f[2], a.Z, b.Z)
);
}
v2f PARAM_PVFN(interpolate) (float fac, const v2f a, const v2f b)
{ return b.getInterpolated(a, fac); }
v3f PARAM_PVFN(interpolate) (float fac, const v3f a, const v3f b)
{ return b.getInterpolated(a, fac); }
#define PARAM_DEF_SRZR(T, wr, rd) \
void PARAM_PVFN(serialize) (std::ostream& os, T v) {wr(os,v); } \
void PARAM_PVFN(deSerialize)(std::istream& is, T& v) {v = rd(is);}
#define PARAM_DEF_NUM(T, wr, rd) PARAM_DEF_SRZR(T, wr, rd) \
T PARAM_PVFN(interpolate)(float fac, const T a, const T b) \
{ return numericalBlend<T>(fac,a,b); } \
T PARAM_PVFN(pick) (float* f, const T a, const T b) \
{ return numericalBlend<T>(f[0],a,b); }
PARAM_DEF_NUM(u8, writeU8, readU8); PARAM_DEF_NUM(s8, writeS8, readS8);
PARAM_DEF_NUM(u16, writeU16, readU16); PARAM_DEF_NUM(s16, writeS16, readS16);
PARAM_DEF_NUM(u32, writeU32, readU32); PARAM_DEF_NUM(s32, writeS32, readS32);
PARAM_DEF_NUM(f32, writeF32, readF32);
PARAM_DEF_SRZR(v2f, writeV2F32, readV2F32);
PARAM_DEF_SRZR(v3f, writeV3F32, readV3F32);
enum class ParticleTextureFlags : u8 {
/* each value specifies a bit in a bitmask; if the maximum value
* goes above 1<<7 the type of the flags field must be changed
* from u8, which will necessitate a protocol change! */
// the first bit indicates whether the texture is animated
animated = 1,
/* the next three bits indicate the blending mode of the texture
* blendmode is encoded by (flags |= (u8)blend << 1); retrieve with
* (flags & ParticleTextureFlags::blend) >> 1. note that the third
* bit is currently reserved for adding more blend modes in the future */
blend = 0x7 << 1,
};
/* define some shorthand so we don't have to repeat ourselves or use
* decltype everywhere */
using FlagT = std::underlying_type_t<ParticleTextureFlags>;
void ServerParticleTexture::serialize(std::ostream &os, u16 protocol_ver, bool newPropertiesOnly) const
{
/* newPropertiesOnly is used to de/serialize parameters of the legacy texture
* field, which are encoded separately from the texspec string */
FlagT flags = 0;
if (animated)
flags |= FlagT(ParticleTextureFlags::animated);
if (blendmode != BlendMode::alpha)
flags |= FlagT(blendmode) << 1;
serializeParameterValue(os, flags);
alpha.serialize(os);
scale.serialize(os);
if (!newPropertiesOnly)
os << serializeString32(string);
if (animated)
animation.serialize(os, protocol_ver);
}
void ServerParticleTexture::deSerialize(std::istream &is, u16 protocol_ver, bool newPropertiesOnly)
{
FlagT flags = 0;
deSerializeParameterValue(is, flags);
animated = !!(flags & FlagT(ParticleTextureFlags::animated));
blendmode = BlendMode((flags & FlagT(ParticleTextureFlags::blend)) >> 1);
alpha.deSerialize(is);
scale.deSerialize(is);
if (!newPropertiesOnly)
string = deSerializeString32(is);
if (animated)
animation.deSerialize(is, protocol_ver);
}
void ParticleParameters::serialize(std::ostream &os, u16 protocol_ver) const
{
writeV3F32(os, pos);
writeV3F32(os, vel);
writeV3F32(os, acc);
writeF32(os, expirationtime);
writeF32(os, size);
writeU8(os, collisiondetection);
os << serializeString32(texture.string);
writeU8(os, vertical);
writeU8(os, collision_removal);
animation.serialize(os, 6); /* NOT the protocol ver */
writeU8(os, glow);
writeU8(os, object_collision);
writeU16(os, node.param0);
writeU8(os, node.param2);
writeU8(os, node_tile);
writeV3F32(os, drag);
jitter.serialize(os);
bounce.serialize(os);
}
template <typename T, T (reader)(std::istream& is)>
inline bool streamEndsBeforeParam(T& val, std::istream& is)
{
// This is kinda awful
T tmp = reader(is);
if (is.eof())
return true;
val = tmp;
return false;
}
void ParticleParameters::deSerialize(std::istream &is, u16 protocol_ver)
{
pos = readV3F32(is);
vel = readV3F32(is);
acc = readV3F32(is);
expirationtime = readF32(is);
size = readF32(is);
collisiondetection = readU8(is);
texture.string = deSerializeString32(is);
vertical = readU8(is);
collision_removal = readU8(is);
animation.deSerialize(is, 6); /* NOT the protocol ver */
glow = readU8(is);
object_collision = readU8(is);
if (streamEndsBeforeParam<u16, readU16>(node.param0, is))
return;
node.param2 = readU8(is);
node_tile = readU8(is);
if (streamEndsBeforeParam<v3f, readV3F32>(drag, is))
return;
jitter.deSerialize(is);
bounce.deSerialize(is);
}
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