/* Rotate Square */ #include #include #include /* End up not using it. enum Quadrant { // Quadrants Line between quadrants One = 2, OneTwo = 1, Two = 0, TwoThree = 3, Three = 5, ThreeFour = 6, Four = 7, FourOne = 4 }; */ struct Point { float x; float y; /* Quadrant getQuadrant() { if (x > 0 && y > 0) { return Quadrant::One; } else if (x == 0 && y >= 0) { return Quadrant::OneTwo; } else if (x < 0 && y > 0) { return Quadrant::Two; } else if (x < 0 && y == 0) { return Quadrant::TwoThree; } else if (x < 0 && y < 0) { return Quadrant::Three; } else if (x == 0 && y < 0) { return Quadrant::ThreeFour; } else if (x > 0 && y < 0) { return Quadrant::Four; } else return Quadrant::FourOne; } */ }; class Square { private: Point m_vertices[4]; size_t m_size; public: Square(size_t size) : m_size(size), m_vertices{} { float half = (float)size / 2.f; m_vertices[0] = { -half, half }; m_vertices[1] = { half, half }; m_vertices[2] = { half, -half }; m_vertices[3] = { -half, -half }; } void Rotate(float fDeg) { float fRad = (fDeg * 3.14159f) / 180.f; for (Point& p : m_vertices) { p = { (cosf(fRad) * p.x) + (-sinf(fRad) * p.y), (sinf(fRad) * p.x) + (cosf(fRad) * p.y) }; } } void Draw() { for (Point& p : m_vertices) { printf("(%.2f, %.2f) ", p.x, p.y); } printf("\n"); int size = m_size * 2; int offset = m_size; bool found = false; for (int ty = 0; ty < size; ty++) { for (int tx = 0; tx < size * 2; tx++) { int x = tx - offset * 2; int y = offset - ty; for (Point& p : m_vertices) { if (x == static_cast(p.x * 2) && y == static_cast(p.y)) { printf("*"); found = true; break; } } if (!found) { printf(" "); } else found = false; } printf("\n"); } } }; int main() { Square square(8); char buffer[0x40]; float rotation = 0.f; printf("Please enter an angle in degrees : "); // scanf wasn't working. // I had no choice but to use this. std::cin >> rotation; if (std::cin.fail()) { printf("\nInvalid input! Please try again.\n"); return EXIT_FAILURE; } printf("%.2f\n", rotation); square.Rotate(rotation); square.Draw(); return EXIT_SUCCESS; }

Rotate Square 2019/09/17 19:36