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https://github.com/minetest/minetest.git
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Particle spawner: Move definitions to source
Long functions were moved to the source file to keep the header short to speed up compiling. This has no functional change.
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@ -19,8 +19,122 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include "particles.h"
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#include <type_traits>
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using namespace ParticleParamTypes;
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template<typename T>
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void RangedParameter<T>::serialize(std::ostream &os) const
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{
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min.serialize(os);
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max.serialize(os);
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writeF32(os, bias);
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}
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template<typename T>
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void RangedParameter<T>::deSerialize(std::istream &is)
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{
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min.deSerialize(is);
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max.deSerialize(is);
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bias = readF32(is);
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}
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template<typename T>
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T RangedParameter<T>::pickWithin() const
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{
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typename T::pickFactors values;
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auto p = numericAbsolute(bias) + 1;
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for (size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i) {
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if (bias < 0)
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values[i] = 1.0f - pow(myrand_float(), p);
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else
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values[i] = pow(myrand_float(), p);
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}
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return T::pick(values, min, max);
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}
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template<typename T>
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T TweenedParameter<T>::blend(float fac) const
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{
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// warp time coordinates in accordance w/ settings
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if (fac > beginning) {
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// remap for beginning offset
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auto len = 1 - beginning;
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fac -= beginning;
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fac /= len;
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// remap for repetitions
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fac *= reps;
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if (fac > 1) // poor man's modulo
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fac -= (decltype(reps))fac;
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// remap for style
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switch (style) {
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case TweenStyle::fwd: /* do nothing */ break;
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case TweenStyle::rev: fac = 1.0f - fac; break;
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case TweenStyle::pulse:
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case TweenStyle::flicker: {
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if (fac > 0.5f) {
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fac = 1.f - (fac*2.f - 1.f);
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} else {
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fac = fac * 2;
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}
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if (style == TweenStyle::flicker) {
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fac *= myrand_range(0.7f, 1.0f);
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}
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}
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}
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if (fac>1.f)
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fac = 1.f;
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else if (fac<0.f)
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fac = 0.f;
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} else {
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fac = (style == TweenStyle::rev) ? 1.f : 0.f;
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}
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return start.interpolate(fac, end);
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}
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template<typename T>
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void TweenedParameter<T>::serialize(std::ostream &os) const
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{
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writeU8(os, static_cast<u8>(style));
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writeU16(os, reps);
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writeF32(os, beginning);
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start.serialize(os);
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end.serialize(os);
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}
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template<typename T>
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void TweenedParameter<T>::deSerialize(std::istream &is)
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{
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style = static_cast<TweenStyle>(readU8(is));
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reps = readU16(is);
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beginning = readF32(is);
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start.deSerialize(is);
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end.deSerialize(is);
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}
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namespace ParticleParamTypes {
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// For function definitions
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template struct RangedParameter<v3fParameter>;
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template struct RangedParameter<f32Parameter>;
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template struct TweenedParameter<v2fParameter>;
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template struct TweenedParameter<v3fParameter>;
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template struct TweenedParameter<f32Parameter>;
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template struct TweenedParameter<v3fRange>;
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template struct TweenedParameter<f32Range>;
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}
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// Linear interpolation
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template <typename T>
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static T numericalBlend(float fac, T min, T max)
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{
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return min + ((max - min) * fac);
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}
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#define PARAM_PVFN(n) ParticleParamTypes::n##ParameterValue
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v2f PARAM_PVFN(pick) (float* f, const v2f a, const v2f b) {
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return v2f(
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115
src/particles.h
115
src/particles.h
@ -49,6 +49,7 @@ namespace ParticleParamTypes
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type interpolateParameterValue(float fac, const type a, const type b); \
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type pickParameterValue (float* facs, const type a, const type b);
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// Function definition: see "particles.cpp"
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DECL_PARAM_OVERLOADS(u8); DECL_PARAM_OVERLOADS(s8);
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DECL_PARAM_OVERLOADS(u16); DECL_PARAM_OVERLOADS(s16);
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DECL_PARAM_OVERLOADS(u32); DECL_PARAM_OVERLOADS(s32);
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@ -83,8 +84,7 @@ namespace ParticleParamTypes
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k = (E)v;
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}
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/* this is your brain on C++. */
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// Describes a single value
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template <typename T, size_t PN>
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struct Parameter
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{
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@ -119,9 +119,8 @@ namespace ParticleParamTypes
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};
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template <typename T> T numericalBlend(float fac, T min, T max)
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{ return min + ((max - min) * fac); }
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// New struct required to differentiate between core::vectorNd-compatible
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// structs for proper value dumping (debugging)
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template <typename T, size_t N>
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struct VectorParameter : public Parameter<T,N> {
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using This = VectorParameter<T,N>;
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@ -146,15 +145,12 @@ namespace ParticleParamTypes
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return oss.str();
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}
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using u8Parameter = Parameter<u8, 1>; using s8Parameter = Parameter<s8, 1>;
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using u16Parameter = Parameter<u16, 1>; using s16Parameter = Parameter<s16, 1>;
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using u32Parameter = Parameter<u32, 1>; using s32Parameter = Parameter<s32, 1>;
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using f32Parameter = Parameter<f32, 1>;
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using v2fParameter = VectorParameter<v2f, 2>;
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using v3fParameter = VectorParameter<v3f, 3>;
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// Add more parameter types here if you need them ...
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// Bound limits information based on "Parameter" types
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template <typename T>
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struct RangedParameter
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{
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@ -168,9 +164,7 @@ namespace ParticleParamTypes
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RangedParameter(T _min, T _max) : min(_min), max(_max) {}
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template <typename M> RangedParameter(M b) : min(b), max(b) {}
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// these functions handle the old range serialization "format"; bias must
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// be manually encoded in a separate part of the stream. NEVER ADD FIELDS
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// TO THESE FUNCTIONS
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// Binary format must not be changed. Function is to be deprecated.
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void legacySerialize(std::ostream &os) const
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{
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min.serialize(os);
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@ -182,17 +176,8 @@ namespace ParticleParamTypes
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max.deSerialize(is);
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}
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// these functions handle the format used by new fields. new fields go here
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void serialize(std::ostream &os) const
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{
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legacySerialize(os);
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writeF32(os, bias);
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}
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void deSerialize(std::istream &is)
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{
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legacyDeSerialize(is);
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bias = readF32(is);
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}
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void serialize(std::ostream &os) const;
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void deSerialize(std::istream &is);
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This interpolate(float fac, const This against) const
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{
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@ -203,19 +188,8 @@ namespace ParticleParamTypes
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return r;
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}
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T pickWithin() const
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{
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typename T::pickFactors values;
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auto p = numericAbsolute(bias) + 1;
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for (size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i) {
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if (bias < 0)
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values[i] = 1.0f - pow(myrand_float(), p);
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else
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values[i] = pow(myrand_float(), p);
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}
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return T::pick(values, min, max);
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}
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// Pick a random value (e.g. position) within bounds
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T pickWithin() const;
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};
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template <typename T>
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@ -229,8 +203,10 @@ namespace ParticleParamTypes
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return s.str();
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}
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// Animation styles (fwd is normal, linear interpolation)
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enum class TweenStyle : u8 { fwd, rev, pulse, flicker };
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// "Tweened" pretty much means "animated" in this context
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template <typename T>
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struct TweenedParameter
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{
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@ -238,72 +214,21 @@ namespace ParticleParamTypes
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using This = TweenedParameter<T>;
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TweenStyle style = TweenStyle::fwd;
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u16 reps = 1;
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f32 beginning = 0.0f;
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u16 reps = 1; // Blending repetitions (same pattern)
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f32 beginning = 0.0f; // Blending start offset
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T start, end;
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TweenedParameter() = default;
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TweenedParameter(T _start, T _end) : start(_start), end(_end) {}
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// For initializer lists and assignment
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template <typename M> TweenedParameter(M b) : start(b), end(b) {}
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T blend(float fac) const
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{
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// warp time coordinates in accordance w/ settings
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if (fac > beginning) {
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// remap for beginning offset
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auto len = 1 - beginning;
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fac -= beginning;
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fac /= len;
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// Blend (or animate) the current value
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T blend(float fac) const;
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// remap for repetitions
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fac *= reps;
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if (fac > 1) // poor man's modulo
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fac -= (decltype(reps))fac;
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// remap for style
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switch (style) {
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case TweenStyle::fwd: /* do nothing */ break;
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case TweenStyle::rev: fac = 1.0f - fac; break;
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case TweenStyle::pulse:
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case TweenStyle::flicker: {
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if (fac > 0.5f) {
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fac = 1.f - (fac*2.f - 1.f);
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} else {
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fac = fac * 2;
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}
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if (style == TweenStyle::flicker) {
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fac *= myrand_range(0.7f, 1.0f);
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}
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}
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}
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if (fac>1.f)
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fac = 1.f;
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else if (fac<0.f)
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fac = 0.f;
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} else {
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fac = (style == TweenStyle::rev) ? 1.f : 0.f;
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}
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return start.interpolate(fac, end);
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}
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void serialize(std::ostream &os) const
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{
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writeU8(os, static_cast<u8>(style));
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writeU16(os, reps);
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writeF32(os, beginning);
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start.serialize(os);
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end.serialize(os);
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}
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void deSerialize(std::istream &is)
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{
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style = static_cast<TweenStyle>(readU8(is));
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reps = readU16(is);
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beginning = readF32(is);
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start.deSerialize(is);
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end.deSerialize(is);
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}
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void serialize(std::ostream &os) const;
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void deSerialize(std::istream &is);
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};
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template <typename T>
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