Color Wall Game

01 / Interpolate movement toward a wall

Input selects a destination wall and stores starting position/time. Divide elapsed time by MOVE_DURATION and linearly interpolate to the destination. On completion, compare the selected wall’s color to the directive; this is not a general circle-versus-rectangle physics test.

t = min(1, elapsed / MOVE_DURATION)
pos(t) = start + t(target−start)

    Uint32 elapsed = currentTime - moveStartTime;
    float t = static_cast<float>(elapsed) / MOVE_DURATION;

    // 移動完了後は位置を固定
    if (t >= 1.0f) {
        t = 1.0f;
    }

    // 線形補間で位置を更新
    x = startX + t * (targetX - startX);
    y = startY + t * (targetY - startY);

02 / Reduce the time limit every five successes

A success increments score and success count. Every fifth success subtracts 0.2 seconds from the round limit, clamped at MIN_MAX_TIME. The next round resets remaining time to the new limit.

T(k) = max(Tmin, T₀ − 0.2 floor(k/5))

k: cumulative successes; T₀ and Tmin: configured limits. Remaining time decreases by deltaTime during both playing and moving states.

                if (successCount % 5 == 0) {
                    currentMaxTime -= 0.2f;
                    if (currentMaxTime < MIN_MAX_TIME) {
                        currentMaxTime = MIN_MAX_TIME;
                    }
                }