Friendly Robot Class You will create a Robot class which will be able to draw a little robot icon at a particular place on the screen. Your robot will alternate drawing from two possible icons to create a small animation. We've provided main.cc that uses your Robot class to draw an animated robot that follows your cursor around. You will be implementing four member functions we've declared for you in the Robot class in robot.h. Robot needs a constructor, and getter and setter functions (aka accessors and mutators) for pixel location. Constructor We've declared the constructor in robot.h: Robot (const std::string& filenamel, const std::string& filename2); You must implement the Robot Class constructor in robot.cc. It takes two string parameters, the filename for the robot icon to show first, and the filename for the robot icon to show second. Your constructor should save these filenames in the filename1_ and filename2_ member variables but should not construct the images yet. Why not load the images in the constructor? It's not good practice to do work in constructors because if there is an error it leaves the program in a bad state. Don't forget: when you implement a member function, you must specify the class name before the function name, so the compiler knows that the function is a member of the class e.g.: int MyClassName::MyFunctionName() { }
main.cc file
#include "robotutils/robotclicklistener.h"
//
// You do not need to edit this file.
//
// Helper function to create robot*.bmp. Feel free to make your own
// icons and use this for inspiration.
/*
void CreateRobotIcon() {
graphics::Image image(31, 31);
// Arms
image.DrawLine(0, 10, 10, 15, 109, 131, 161, 6);
image.DrawLine(30, 10, 10, 15, 109, 131, 161, 6);
// Legs
image.DrawLine(10, 15, 10, 30, 109, 131, 161, 6);
image.DrawLine(20, 15, 20, 30, 109, 131, 161, 6);
// Body
image.DrawRectangle(5, 0, 20, 22, 130, 151, 179);
// Eyes
image.DrawCircle(10, 8, 2, 255, 255, 255);
image.DrawCircle(20, 8, 2, 255, 255, 255);
image.DrawCircle(9, 8, 2, 62, 66, 71);
image.DrawCircle(19, 8, 2, 62, 66, 71);
image.SaveImageBmp("robot.bmp");
}
*/
int main() {
RobotClickListener listener{};
listener.Start();
return 0;
}
robot.cc file
#include "robot.h"
#include <string>
#include "cpputils/graphics/image.h"
// ========================= YOUR CODE HERE =========================
// This implementation file (robot.cc) should hold the
// implementation of member functions declared in the header (robot.h).
//
// Implement the following member functions, declared in robot.h:
// 1. Robot constructor
// 2. SetPosition
// 3. GetX
// 4. GetY
//
// Remember to specify the name of the class with :: in this format:
// <return type> MyClassName::MyFunction() {
// ...
// }
// to tell the compiler that each function belongs to the Robot class.
// ===================================================================
// You don't need to modify these. These are helper functions
// used to load the robot icons and draw them on the screen.
void Robot::Draw(graphics::Image& image) {
// Load the image into the icon if needed.
if (icon1_.GetWidth() <= 0) {
icon1_.Load(filename1_);
}
if (icon2_.GetWidth() <= 0) {
icon2_.Load(filename2_);
}
mod_ = (mod_ + 1) % 2;
if (mod_ == 1) {
DrawIconOnImage(icon1_, image);
} else {
DrawIconOnImage(icon2_, image);
}
}
void Robot::DrawIconOnImage(graphics::Image& icon,
graphics::Image& image) const {
int width = icon.GetWidth();
int height = icon.GetHeight();
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
int x = x_ + i - width / 2;
int y = y_ + j - height / 2;
if (y >= 0 && x >= 0 && x < image.GetWidth() && y < image.GetHeight()) {
image.SetColor(x, y, icon.GetColor(i, j));
}
}
}
}
robot.h file
#include <string>
#include "cpputils/graphics/image.h"
class Robot {
public:
// You don't need to change this file, but you will be
// implementing some of these member functions in robot.cc.
Robot(const std::string& filename1, const std::string& filename2);
void SetPosition(int x, int y);
int GetX() const;
int GetY() const;
void Draw(graphics::Image& image);
private:
void DrawIconOnImage(graphics::Image& icon, graphics::Image& image) const;
std::string filename1_;
std::string filename2_;
graphics::Image icon1_;
graphics::Image icon2_;
graphics::Color color_;
int x_ = 0;
int y_ = 0;
int mod_ = 0;
};
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