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GUI: wave generator, part 2

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tildearrow 2022-07-27 02:23:29 -05:00
parent 7d5f5a91c6
commit 693d457fff
3 changed files with 116 additions and 8 deletions
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6
src/gui/gui.cpp
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@ -4718,9 +4718,9 @@ FurnaceGUI::FurnaceGUI():
#endif
hasACED(false),
waveGenBaseShape(0),
waveGenDuty(0.0f),
waveGenPower(0.0f),
waveGenInvertPoint(0.0f),
waveGenDuty(0.5f),
waveGenPower(1),
waveGenInvertPoint(1.0f),
waveGenFM(false) {
// value keys
valueKeys[SDLK_0]=0;

4
src/gui/gui.h
View file

@ -1468,7 +1468,9 @@ class FurnaceGUI {
// wave generator
int waveGenBaseShape;
float waveGenDuty, waveGenPower, waveGenInvertPoint;
float waveGenDuty;
int waveGenPower;
float waveGenInvertPoint;
float waveGenAmp[16];
float waveGenPhase[16];
float waveGenTL[4];

114
src/gui/waveEdit.cpp
View file

@ -39,34 +39,67 @@ void FurnaceGUI::doGenerateWave() {
DivWavetable* wave=e->song.wave[curWave];
memset(finalResult,0,sizeof(float)*256);
if (wave->len<2) return;
if (waveGenFM) {
} else {
switch (waveGenBaseShape) {
case 0: // sine
for (int i=0; i<wave->len; i++) {
finalResult[i]=0.5*(1.0+sin(i*2.0*M_PI/(double)wave->len));
for (int j=0; j<16; j++) {
float pos=fmod((waveGenPhase[j]*wave->len)+(i*(j+1)),wave->len);
float partial=sin((0.5+pos)*2.0*M_PI/(double)wave->len);
partial=pow(partial,waveGenPower);
partial*=waveGenAmp[j];
finalResult[i]+=partial;
}
}
break;
case 1: // triangle
for (int i=0; i<wave->len; i++) {
finalResult[i]=2.0*(0.5-fabs(0.5-(i/(double)(wave->len-1))));
for (int j=0; j<16; j++) {
float pos=fmod((waveGenPhase[j]*wave->len)+(i*(j+1)),wave->len);
float partial=4.0*(0.5-fabs(0.5-(pos/(double)(wave->len-1))))-1.0;
partial=pow(partial,waveGenPower);
partial*=waveGenAmp[j];
finalResult[i]+=partial;
}
}
break;
case 2: // saw
for (int i=0; i<wave->len; i++) {
finalResult[i]=i/(double)(wave->len-1);
for (int j=0; j<16; j++) {
float pos=fmod((waveGenPhase[j]*wave->len)+(i*(j+1)),wave->len);
float partial=((2*pos)/(double)(wave->len-1))-1.0;
partial=pow(partial,waveGenPower);
partial*=waveGenAmp[j];
finalResult[i]+=partial;
}
}
break;
case 3: // pulse
for (int i=0; i<wave->len; i++) {
finalResult[i]=(i>=(wave->len/2))?1:0;
for (int j=0; j<16; j++) {
float pos=fmod((waveGenPhase[j]*wave->len)+(i*(j+1)),wave->len);
float partial=(pos>=(waveGenDuty*wave->len))?1:-1;
partial=pow(partial,waveGenPower);
partial*=waveGenAmp[j];
finalResult[i]+=partial;
}
}
break;
}
}
for (int i=waveGenInvertPoint*wave->len; i<wave->len; i++) {
finalResult[i]=-finalResult[i];
}
for (int i=0; i<wave->len; i++) {
finalResult[i]=(1.0+finalResult[i])*0.5;
if (finalResult[i]<0.0f) finalResult[i]=0.0f;
if (finalResult[i]>1.0f) finalResult[i]=1.0f;
wave->data[i]=round(finalResult[i]*wave->max);
}
}
@ -202,6 +235,79 @@ void FurnaceGUI::drawWaveEdit() {
if (waveGenBaseShape>3) waveGenBaseShape=3;
doGenerateWave();
}
if (ImGui::BeginTable("WGShapeProps",2)) {
ImGui::TableSetupColumn("c0",ImGuiTableColumnFlags_WidthFixed);
ImGui::TableSetupColumn("c1",ImGuiTableColumnFlags_WidthStretch);
ImGui::TableNextRow();
ImGui::TableNextColumn();
ImGui::Text("Duty");
ImGui::TableNextColumn();
ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
if (CWSliderFloat("##WGDuty",&waveGenDuty,0.0f,1.0f)) {
doGenerateWave();
}
ImGui::TableNextRow();
ImGui::TableNextColumn();
ImGui::Text("Exponent");
ImGui::TableNextColumn();
ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
if (CWSliderInt("##WGExp",&waveGenPower,1,8)) {
doGenerateWave();
}
ImGui::TableNextRow();
ImGui::TableNextColumn();
ImGui::Text("XOR Point");
ImGui::TableNextColumn();
ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
if (CWSliderFloat("##WGXOR",&waveGenInvertPoint,0.0f,1.0f)) {
doGenerateWave();
}
ImGui::EndTable();
}
if (ImGui::TreeNode("Amplitude/Phase")) {
if (ImGui::BeginTable("WGShapeProps",3)) {
ImGui::TableSetupColumn("c0",ImGuiTableColumnFlags_WidthFixed);
ImGui::TableSetupColumn("c1",ImGuiTableColumnFlags_WidthStretch,0.6f);
ImGui::TableSetupColumn("c2",ImGuiTableColumnFlags_WidthStretch,0.4f);
for (int i=0; i<16; i++) {
ImGui::TableNextRow();
ImGui::TableNextColumn();
ImGui::Text("%d",i+1);
ImGui::TableNextColumn();
ImGui::PushID(140+i);
ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
if (CWSliderFloat("##WGAmp",&waveGenAmp[i],-1.0f,1.0f)) {
doGenerateWave();
}
if (ImGui::IsItemClicked(ImGuiMouseButton_Middle)) {
waveGenAmp[i]=0.0f;
doGenerateWave();
}
ImGui::PopID();
ImGui::TableNextColumn();
ImGui::PushID(140+i);
ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
if (CWSliderFloat("##WGPhase",&waveGenPhase[i],0.0f,1.0f)) {
doGenerateWave();
}
if (ImGui::IsItemClicked(ImGuiMouseButton_Middle)) {
waveGenPhase[i]=0.0f;
doGenerateWave();
}
ImGui::PopID();
}
ImGui::EndTable();
}
ImGui::TreePop();
}
ImGui::EndTabItem();
}
if (ImGui::BeginTabItem("FM")) {