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Update ClangCymbal randomization
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@ryukau
ryukau committed Oct 27, 2023
1 parent 23211b4 commit 3125975
Showing 1 changed file with 59 additions and 36 deletions.
95 changes: 59 additions & 36 deletions ClangCymbal/source/gui/randomizebutton.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -34,9 +34,10 @@ namespace VSTGUI {

class RandomizeButton : public CControl {
// Note: GCC and Clang can't deduce template when `generateFilterTable` and
// `generateEnvTable` is defined before use.
// `generateEnvTable` are defined before use.
private:
template<typename Rng> inline auto generateFilterTable(Rng &rng)
template<typename Rng>
inline auto generateFilterTable(Rng &rng, Steinberg::Vst::ParamValue maxValue)
{
using Pv = Steinberg::Vst::ParamValue;
constexpr int length = int(fdnMatrixSize);
Expand All @@ -61,7 +62,7 @@ class RandomizeButton : public CControl {
// Random scaling.
Pv max = 0;
for (int i = 0; i < length; ++i) max = std::max(max, std::abs(table[i]));
std::uniform_real_distribution<Pv> uniform01{Pv(0), Pv(1)};
std::uniform_real_distribution<Pv> uniform01{Pv(0), Pv(maxValue)};
if (max != 0) {
auto scaler = uniform01(rng) / max;
for (int i = 0; i < length; ++i) table[i] *= scaler;
Expand All @@ -82,12 +83,16 @@ class RandomizeButton : public CControl {
std::uniform_real_distribution<Pv> uniform{Pv(0), Pv(1)};
std::generate(table.begin(), table.end(), [&]() { return uniform(rng); });

Pv v1 = 0;
Pv v2 = 0;
for (int idx = nModEnvelopeWavetable - 1; idx >= 0; --idx) {
v1 += Pv(0.3) * (table[idx] - v1);
v2 += Pv(0.3) * (v1 - v2);
table[idx] = v2;
Pv v1 = Pv(0);
Pv v2 = Pv(1);
std::uniform_real_distribution<Pv> uniformLower{Pv(0), Pv(0.25)};
Pv k1 = std::pow(uniformLower(rng), Pv(1.25));
Pv k2 = uniform(rng) * Pv(0.5);
k2 *= k2;
for (int idx = 0; idx < nModEnvelopeWavetable; ++idx) {
v1 += k1 * (Pv(1) - v1);
v2 += k2 * (Pv(0) - v2);
table[idx] = v1 * v2;
}

const auto iter = std::max_element(table.begin(), table.end());
Expand Down Expand Up @@ -190,13 +195,19 @@ class RandomizeButton : public CControl {
std::uniform_real_distribution<Pv> uniform{Pv(0), Pv(1)};
std::uniform_real_distribution<Pv> uniformUpperHalf{Pv(0.5), Pv(1)};
std::uniform_real_distribution<Pv> uniformLowerHalf{Pv(0), Pv(0.5)};
setParam(ID::impulseGain, uniform(rng));
// setParam(ID::oscGain, uniform(rng));
if (uniform(rng) < Pv(0.5)) {
setParam(ID::impulseGain, Pv(1));
setParam(ID::oscGain, uniform(rng));
} else {
setParam(ID::impulseGain, uniform(rng));
setParam(ID::oscGain, Pv(1));
}
setParam(ID::oscNoisePulseRatio, uniform(rng));
setParam(ID::oscAttack, uniformLowerHalf(rng));
setParam(ID::oscDecay, uniformUpperHalf(rng));
setParam(ID::oscDensityHz, uniformUpperHalf(rng));
setParam(ID::oscDensityKeyFollow, uniform(rng));
std::uniform_real_distribution<Pv> uniformOscDensityHz{Pv(0.5), Pv(5) / Pv(6)};
setParam(ID::oscDensityHz, uniformOscDensityHz(rng));
// setParam(ID::oscDensityKeyFollow, uniform(rng));
setParam(ID::oscNoiseDecay, uniform(rng));
setParam(ID::oscBounce, uniform(rng));
setParam(ID::oscBounceCurve, uniform(rng));
Expand All @@ -207,40 +218,42 @@ class RandomizeButton : public CControl {
setParam(ID::oscLowpassKeyFollow, uniform(rng));

setParam(ID::fdnMatrixIdentityAmount, uniform(rng));
setParam(ID::fdnFeedback, uniform(rng));
// setParam(ID::fdnFeedback, uniform(rng));
setParam(ID::fdnOvertoneAdd, uniform(rng));
setParam(ID::fdnOvertoneMul, uniform(rng));
std::uniform_real_distribution<Pv> uniformFdnOvertoneMul{Pv(0), Pv(0.6)};
setParam(ID::fdnOvertoneMul, uniformFdnOvertoneMul(rng));
setParam(ID::fdnOvertoneOffset, uniform(rng));
setParam(ID::fdnOvertoneModulo, uniform(rng));
// setParam(ID::fdnOvertoneRandomness, uniform(rng));
setParam(ID::fdnInterpRate, uniform(rng));
std::uniform_real_distribution<Pv> uniformFdnOvertoneRandomness{Pv(0), Pv(0.01)};
setParam(ID::fdnOvertoneRandomness, uniformFdnOvertoneRandomness(rng));
std::uniform_real_distribution<Pv> uniformFdnInterpRate{Pv(0.25), Pv(0.75)};
setParam(ID::fdnInterpRate, uniformFdnInterpRate(rng));
setParam(ID::fdnInterpLowpassSecond, uniform(rng));
setParam(ID::fdnSeed, uniform(rng));
// setParam(ID::fdnRandomizeRatio, uniform(rng));
std::uniform_real_distribution<Pv> uniformFdnRandomizeRatio{Pv(0), Pv(0.2)};
setParam(ID::fdnRandomizeRatio, uniformFdnRandomizeRatio(rng));

auto lpCut = generateFilterTable(rng);
auto lpQ = generateFilterTable(rng);
auto hpCut = generateFilterTable(rng);
auto hpQ = generateFilterTable(rng);
auto lpCut = generateFilterTable(rng, Pv(1));
auto lpQ = generateFilterTable(rng, Pv(1));
auto hpCut = generateFilterTable(rng, Pv(0.1));
auto hpQ = generateFilterTable(rng, Pv(1));
for (int idx = 0; idx < fdnMatrixSize; ++idx) {
setParam(ID::fdnLowpassCutoffSemiOffset0 + idx, lpCut[idx]);
setParam(ID::fdnLowpassQOffset0 + idx, lpQ[idx]);
setParam(ID::fdnHighpassCutoffSemiOffset0 + idx, hpCut[idx]);
setParam(ID::fdnHighpassQOffset0 + idx, hpQ[idx]);
}

auto lpSemi = uniform(rng);
auto hpSemi = uniform(rng);
if (lpSemi < hpSemi) std::swap(lpSemi, hpSemi);

setParam(ID::fdnLowpassCutoffSemi, lpSemi);
setParam(ID::fdnLowpassCutoffSlope, uniform(rng));
setParam(ID::fdnLowpassQ, uniform(rng));
std::uniform_real_distribution<Pv> uniformLpSemi{Pv(0.6), Pv(1)};
setParam(ID::fdnLowpassCutoffSemi, uniformLpSemi(rng));
// setParam(ID::fdnLowpassCutoffSlope, uniform(rng));
// setParam(ID::fdnLowpassQ, uniform(rng));
setParam(ID::fdnLowpassQSlope, uniform(rng));
// setParam(ID::fdnLowpassKeyFollow, uniform(rng));
setParam(ID::fdnHighpassCutoffSemi, hpSemi);
setParam(ID::fdnHighpassCutoffSlope, uniform(rng));
setParam(ID::fdnHighpassQ, uniform(rng));
std::uniform_real_distribution<Pv> uniformHpSemi{Pv(0), Pv(0.55)};
setParam(ID::fdnHighpassCutoffSemi, uniformHpSemi(rng));
// setParam(ID::fdnHighpassCutoffSlope, uniform(rng));
// setParam(ID::fdnHighpassQ, uniform(rng));
setParam(ID::fdnHighpassQSlope, uniform(rng));
// setParam(ID::fdnHighpassKeyFollow, uniform(rng));

Expand All @@ -249,10 +262,20 @@ class RandomizeButton : public CControl {
setParam(ID::modEnvelopeWavetable0 + idx, table[idx]);
}
setParam(ID::modEnvelopeTime, uniform(rng));
setParam(ID::modEnvelopeToFdnLowpassCutoff, uniform(rng));
setParam(ID::modEnvelopeToFdnHighpassCutoff, uniform(rng));
setParam(ID::modEnvelopeToFdnPitch, uniform(rng));
setParam(ID::modEnvelopeToFdnOvertoneAdd, uniform(rng));
if (uniform(rng) < Pv(0.25)) {
setParam(ID::modEnvelopeToFdnLowpassCutoff, uniform(rng));
setParam(ID::modEnvelopeToFdnHighpassCutoff, uniform(rng));
} else {
setParam(ID::modEnvelopeToFdnLowpassCutoff, Pv(0.5));
setParam(ID::modEnvelopeToFdnHighpassCutoff, Pv(0.5));
}
if (uniform(rng) < Pv(0.33)) {
setParam(ID::modEnvelopeToFdnPitch, uniform(rng));
setParam(ID::modEnvelopeToFdnOvertoneAdd, uniform(rng));
} else {
setParam(ID::modEnvelopeToFdnPitch, Pv(0.5));
setParam(ID::modEnvelopeToFdnOvertoneAdd, Pv(0));
}
setParam(ID::modEnvelopeToOscJitter, uniform(rng));
setParam(ID::modEnvelopeToOscNoisePulseRatio, uniform(rng));

Expand Down

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