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Enable negative Alpha in Source Callback for inactive source

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setAlpha() to negative value allows to make the source inactive (outside mixing circle)
This commit is contained in:
Bruno Herbelin
2023-02-13 23:51:16 +01:00
parent 21045411e7
commit c7367ad46a
2 changed files with 16 additions and 5 deletions
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17
src/SourceCallback.cpp
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@@ -227,7 +227,7 @@ SourceCallback *ResetGeometry::clone() const
SetAlpha::SetAlpha(float alpha, float ms, bool revert) : SourceCallback(),
duration_(ms), alpha_(alpha), bidirectional_(revert)
{
alpha_ = glm::clamp(alpha_, 0.f, 1.f);
alpha_ = glm::clamp(alpha_, -1.f, 1.f);
start_ = glm::vec2();
target_ = glm::vec2();
}
@@ -252,8 +252,13 @@ void SetAlpha::update(Source *s, float dt)
//
// target mixing view position
//
// special case Alpha < 0 : negative means inactive
if (alpha_ < -DELTA_ALPHA) {
// linear interpolation between 1 and the value given (max 2.f)
target_ = step * ( ABS(alpha_) + 1.f);
}
// special case Alpha = 0
if (alpha_ < DELTA_ALPHA) {
else if (alpha_ < DELTA_ALPHA) {
target_ = step;
}
// special case Alpha = 1
@@ -305,7 +310,13 @@ SourceCallback *SetAlpha::clone() const
SourceCallback *SetAlpha::reverse(Source *s) const
{
return bidirectional_ ? new SetAlpha(s->alpha(), duration_) : nullptr;
float _a = glm::length( glm::vec2(s->group(View::MIXING)->translation_) );
if (_a > 1.f)
_a *= -1.f;
else
_a = s->alpha();
return bidirectional_ ? new SetAlpha(_a, duration_) : nullptr;
}
void SetAlpha::accept(Visitor& v)

4
src/UserInterfaceManager.cpp
View File

@@ -4995,11 +4995,11 @@ void InputMappingInterface::SliderParametersCallback(SourceCallback *callback, c
float val = edited->value();
ImGui::SameLine(0, IMGUI_SAME_LINE / 2);
ImGui::SetNextItemWidth(right_align);
if (ImGui::SliderFloat("##CALLBACK_ALPHA", &val, 0.f, 1.f, "%.2f"))
if (ImGui::SliderFloat("##CALLBACK_ALPHA", &val, -1.f, 1.f, "%.2f"))
edited->setValue(val);
ImGui::SameLine(0, IMGUI_SAME_LINE / 2);
ImGuiToolkit::Indication("Target alpha makes the source\nvisible (1.0) or transparent (0.0)", 18, 12);
ImGuiToolkit::Indication("Target alpha makes the source\nvisible (1.0), transparent (0.0),\n or innactive (-1.0)", 18, 12);
}
break;