Ben Evans / Mbed 2 deprecated Defender_Game

Ben Evans University Second Year Project. Game Called Defender.

Dependencies:   mbed

https://os.mbed.com/media/uploads/evanso/84bc1a30759fd6a1e3f1fd1fae3e97c2.png

Hello, soldier, you have been specially selected as the defender of planet earth.

Your mission, if you choose to accept it. Fly around the planet and pulverise invading alien ships for as long as you can. Stop the aliens abducting the innocent people on the ground. Be warned if an alien ship manages to abduct a person and take them to top of the screen, they will no longer move randomly and will begin to hunt you down. This sounds like a challenge you were trained for.

But don’t worry soldier you’re not going into battle empty-handed. Your ship is equipped with a state of the art laser beam that has unlimited ammo and four smart bombs that will destroy anything on the screen. The ship also has three lives so use them wisely.

As time goes on more alien ships will arrive on planet earth increasing the difficulty of your mission. And remember the landscape bellow loops around so if you continually fly in the same direction you go to your original position. Good luck soldier.

Gamepad2/Bitmap.cpp

Committer:
evanso
Date:
2020-05-27
Revision:
87:832ca78426b5
Parent:
1:1f2ae263248e

File content as of revision 87:832ca78426b5:

#include "Bitmap.h"

#include <iostream>

#include "N5110.h"

Bitmap::Bitmap(int const               *contents,
               unsigned int const       height,
               unsigned int const       width)
    :
    _contents(std::vector<int>(height*width)),
    _height(height),
    _width(width)
{
    // Perform a quick sanity check of the dimensions
    if (_contents.size() != height * width) {
        std::cerr << "Contents of bitmap has size " << _contents.size()
                  << " pixels, but its dimensions were specified as "
                  << width << " * " << height << " = " << width * height << std::endl;
    }

    for(unsigned int i = 0; i < height*width; ++i) _contents[i] = contents[i];
}

/**
 * @returns the value of the pixel at the given position
 */
int Bitmap::get_pixel(unsigned int const row,
                      unsigned int const column) const
{
    // First check that row and column indices are within bounds
    if(column >= _width || row >= _height)
    {
        std::cerr << "The requested pixel with index " << row << "," << column
                  << "is outside the bitmap dimensions: " << _width << ","
                  << _height << std::endl;
    }

    // Now return the pixel value, using row-major indexing
    return _contents[row * _width + column];
}

/**
 * @brief Prints the contents of the bitmap to the terminal
 */
void Bitmap::print() const
{
    for (unsigned int row = 0; row < _height; ++row)
    {
        // Print each element of the row
        for (unsigned int column = 0; column < _width; ++column)
        {
            int pixel = get_pixel(row, column);
            std::cout << pixel;
        }

        // And then terminate with a new-line character
        std::cout << std::endl;
    }
}

/**
 * @brief Renders the contents of the bitmap onto an N5110 screen
 *
 * @param[in] lcd The screen to use for rendering
 * @param[in] x0  The horizontal position in pixels at which to render the bitmap
 * @param[in] y0  The vertical position in pixels at which to render the bitmap
 *
 * @details Note that x0, y0 gives the location of the top-left of the bitmap on
 *          the screen.
 *          This function only updates the buffer on the screen.  You still need
 *          to refresh the screen in order to actually see the bitmap.
 */
void Bitmap::render(N5110 &lcd,
                    unsigned int const x0,
                    unsigned int const y0) const
{
    // Loop through each row of the bitmap image
    for (unsigned int bitmap_row = 0; bitmap_row < _height; ++bitmap_row)
    {
        // Row index on the screen for rendering the row of pixels
        unsigned int screen_row = y0 + bitmap_row;
                
        // Render each pixel in the row
        for (unsigned int bitmap_col = 0; bitmap_col < _width; ++bitmap_col)
        {
            // Column index on the screen for rendering this pixel
            int screen_col = x0 + bitmap_col;

            // Find the required value of the pixel at the given location within
            // the bitmap data and then write it to the LCD screen
            int pixel = get_pixel(bitmap_row, bitmap_col);
            lcd.setPixel(screen_col, screen_row, pixel);
        }
    }
}