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optimized coordinate calculation

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This commit is contained in:
Chris
2023-08-02 11:12:31 +02:00
parent 11c8fd9045
commit ffb32bc47e
1 changed files with 13 additions and 9 deletions
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22
synth/tx_envelope.h
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@@ -205,36 +205,40 @@ public:
} }
// converts the x/y coordinates of the envelope points as a list for graphical representation. // converts the x/y coordinates of the envelope points as a list for graphical representation.
std::array<float, 18> calc_coordinates(env_params _params) { std::array<float, 18> calc_coordinates(env_params _params, float _max_attack, float _max_decay, float _max_release) {
auto scale = [](float _value, float _max) {
return powf(_value / _max, 0.25) * _max;
};
float a_x = 0; float a_x = 0;
float a_y = 0; float a_y = 0;
float b_x = _params.attack1_rate; float b_x = scale(_params.attack1_rate, _max_attack / 2);
float b_y = _params.attack1_level; float b_y = _params.attack1_level;
float c_x = b_x + _params.attack2_rate; float c_x = b_x + scale(_params.attack2_rate, _max_attack / 2);
float c_y = 1; float c_y = 1;
float d_x = c_x + _params.hold_rate; float d_x = c_x + _params.hold_rate;
float d_y = 1; float d_y = 1;
float e_x = d_x + _params.decay1_rate; float e_x = d_x + scale(_params.decay1_rate, _max_decay / 2);
float e_y = _params.decay1_level; float e_y = _params.decay1_level;
float f_x = e_x + _params.decay2_rate; float f_x = e_x + scale(_params.decay2_rate, _max_decay / 2);
float f_y = _params.sustain_level; float f_y = _params.sustain_level;
float g_x = f_x + 125; float g_x = _max_attack + _max_decay;
float g_y = _params.sustain_level; float g_y = _params.sustain_level;
float h_x = g_x + _params.release1_rate; float h_x = g_x + scale(_params.release1_rate, _max_decay / 2);
float h_y = _params.release1_level; float h_y = _params.release1_level;
float i_x = h_x + _params.release2_rate; float i_x = h_x + scale(_params.release2_rate, _max_decay / 2);
float i_y = 0; float i_y = 0;
float total = i_x; float total = _max_attack + _max_decay + _max_release;
return { return {
a_x, a_x,