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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "input_common/analog_from_button.h"
namespace InputCommon {
class Analog final : public Input::AnalogDevice {
public:
using Button = std::unique_ptr<Input::ButtonDevice>;
Analog(Button up_, Button down_, Button left_, Button right_, Button modifier_,
float modifier_scale_)
: up(std::move(up_)), down(std::move(down_)), left(std::move(left_)),
right(std::move(right_)), modifier(std::move(modifier_)),
modifier_scale(modifier_scale_) {}
std::tuple<float, float> GetStatus() const override {
constexpr float SQRT_HALF = 0.707106781f;
int x = 0, y = 0;
if (right->GetStatus())
++x;
if (left->GetStatus())
--x;
if (up->GetStatus())
++y;
if (down->GetStatus())
--y;
float coef = modifier->GetStatus() ? modifier_scale : 1.0f;
return std::make_tuple(x * coef * (y == 0 ? 1.0f : SQRT_HALF),
y * coef * (x == 0 ? 1.0f : SQRT_HALF));
}
private:
Button up;
Button down;
Button left;
Button right;
Button modifier;
float modifier_scale;
};
std::unique_ptr<Input::AnalogDevice> AnalogFromButton::Create(const Common::ParamPackage& params) {
const std::string null_engine = Common::ParamPackage{{"engine", "null"}}.Serialize();
auto up = Input::CreateDevice<Input::ButtonDevice>(params.Get("up", null_engine));
auto down = Input::CreateDevice<Input::ButtonDevice>(params.Get("down", null_engine));
auto left = Input::CreateDevice<Input::ButtonDevice>(params.Get("left", null_engine));
auto right = Input::CreateDevice<Input::ButtonDevice>(params.Get("right", null_engine));
auto modifier = Input::CreateDevice<Input::ButtonDevice>(params.Get("modifier", null_engine));
auto modifier_scale = params.Get("modifier_scale", 0.5f);
return std::make_unique<Analog>(std::move(up), std::move(down), std::move(left),
std::move(right), std::move(modifier), modifier_scale);
}
} // namespace InputCommon
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