KeyboardController.cpp


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#include "KeyboardController.h"

#include <cmath>

#include <raylib.h>


static constexpr float DIAGONAL {std::sin(M_PI / 4.0f)};


static int check_axis(int negative_key, int positive_key, int last);


KeyboardController::KeyboardController() :
    x_axis {0},
    y_axis {0}
{
}


Vector2
KeyboardController::direction()
{
    x_axis = check_axis(KEY_LEFT, KEY_RIGHT, x_axis);
    y_axis = check_axis(KEY_UP, KEY_DOWN, y_axis);
    if (x_axis != 0 && y_axis != 0)
        return {x_axis * DIAGONAL, y_axis * DIAGONAL};
    return {static_cast<float>(x_axis), static_cast<float>(y_axis)};
}


int
check_axis(const int negative_key, const int positive_key, const int last)
{
    int next = last;
    if (last == 1 && IsKeyReleased(positive_key)) {
        if (IsKeyDown(negative_key))
            next = -1;
        else
            next = 0;
    }
    else if (last == -1 && IsKeyReleased(negative_key)) {
        if (IsKeyDown(positive_key))
            next = 1;
        else
            next = 0;
    }
    if (IsKeyPressed(positive_key))
        next = 1;
    else if (IsKeyPressed(negative_key))
        next = -1;
    return next;
}