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GUI: wave generator, part 5

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completely untested FM generation
This commit is contained in:
tildearrow 2022-09-05 05:48:20 -05:00
parent 9435ab12b0
commit f94c6f101a
1 changed files with 30 additions and 0 deletions
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30
src/gui/waveEdit.cpp
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@ -32,6 +32,25 @@ const char* waveGenBaseShapes[4]={
"Pulse" "Pulse"
}; };
const float multFactors[16]={
M_PI,
2*M_PI,
4*M_PI,
6*M_PI,
8*M_PI,
10*M_PI,
12*M_PI,
14*M_PI,
16*M_PI,
18*M_PI,
20*M_PI,
22*M_PI,
24*M_PI,
26*M_PI,
28*M_PI,
30*M_PI,
};
void FurnaceGUI::doGenerateWave() { void FurnaceGUI::doGenerateWave() {
float finalResult[256]; float finalResult[256];
if (curWave<0 || curWave>=(int)e->song.wave.size()) return; if (curWave<0 || curWave>=(int)e->song.wave.size()) return;
@ -42,7 +61,18 @@ void FurnaceGUI::doGenerateWave() {
if (wave->len<2) return; if (wave->len<2) return;
if (waveGenFM) { if (waveGenFM) {
for (int i=0; i<wave->len; i++) {
float pos=(float)i/(float)wave->len;
float s0=sin(pos*multFactors[waveGenMult[0]])*waveGenTL[0];
float s1=sin((pos+(waveGenFMCon1[0]?s0:0.0f))*multFactors[waveGenMult[1]])*waveGenTL[1];
float s2=sin((pos+(waveGenFMCon1[1]?s0:0.0f)+(waveGenFMCon2[0]?s1:0.0f))*multFactors[waveGenMult[2]])*waveGenTL[2];
float s3=sin((pos+(waveGenFMCon1[2]?s0:0.0f)+(waveGenFMCon2[1]?s1:0.0f)+(waveGenFMCon3[0]?s2:0.0f))*multFactors[waveGenMult[3]])*waveGenTL[3];
if (waveGenFMCon1[3]) finalResult[i]+=s0;
if (waveGenFMCon2[2]) finalResult[i]+=s1;
if (waveGenFMCon3[1]) finalResult[i]+=s2;
finalResult[i]+=s3;
}
} else { } else {
switch (waveGenBaseShape) { switch (waveGenBaseShape) {
case 0: // sine case 0: // sine