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smvd/FlappyBird.c

Last active October 6, 2023 23:19
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flappy bird writen in c running in the terminal
Raw
FlappyBird.c
/*
_ _ _ _____ _ ____ _
| \ | | ___ | |_ | ___| | __ _ _ __ _ __ _ _ | _ \ _ _ ___| | __
| \| |/ _ \| __| | |_ | |/ _` | '_ \| '_ \| | | | | | | | | | |/ __| |/ /
| |\ | (_) | |_ | _| | | (_| | |_) | |_) | |_| | | |_| | |_| | (__| <
|_| \_|\___/ \__| |_| |_|\__,_| .__/| .__/ \__, | |____/ \__,_|\___|_|\_\
|_| |_| |___/
compiler : GCC
command : gcc source.c -o FlappyBird.exe -Werror -Wall -W -s
license : www.unlicense.org (Please credit my channel tho)
youtube : www.rebrand.ly/eclips-coding
version : 3
source : https://gist.github.com/smvd/aeaa7544f75988081285ab399c2579c7
editor : sublime text 3
*/
#include <windows.h> // Header for windows interaction
#include <stdlib.h> // Header for standard functions
#include <string.h> // Header for string manipulation (windows.h also adds this)
#include <stdio.h> // Header for reading and writing
#include <time.h> // Header for time interaction
#define xSize 32
#define ySize 16
#define pipeCount 3
#define qKey 0x51 // Windows virtual key code for 'Q'
#define GREEN "\e[32m" // ANSI code for green output
#define YELLOW "\e[33m" // ANSI code for yellow output
#define NC "\e[0m" // ANSI code for uncolord output
typedef struct
{
int x;
int y;
}PIX;
PIX bird;
PIX pipes[3];
void Draw(); // Function to draw the game board based on the object positions
void Pipes(); // Function to reset the pipes if the hit the end of the screen
void HitTest(); // Function to test for collisions with the floor or the pipes
void Draw()
{
char buff[5000]; // Variable to hold the buffer that will be drawn
strcpy(buff, "\e[17A"); // ANSI code to move the cursor up 17 lines
for (int y = 0; y <= ySize; y++) // Loop over each row
{
for (int x = 0; x <= xSize; x++) // Loop over each column
{
if // If its a screen edge
(
y == 0 ||
y == ySize ||
x == 0 ||
x == xSize
)
{
strcat(buff, NC "[]"); // Add '[]' to the buffer in white
continue; // Move to the next column
}
for (int i = 0; i < pipeCount; i++) // Loop over each pipe
{
if // If its the top or bottom pipe face
(
pipes[i].x >= x -1 &&
pipes[i].x <= x +1 &&
(
pipes[i].y == y + 3 ||
pipes[i].y == y - 3
)
)
{
strcat(buff, GREEN "[]"); // Add '[]' to the buffer in green
goto bottom; // Skip the rest of the tests
}
else if // If its the right angle of the bottom pipe
(
pipes[i].x == x -1 &&
pipes[i].y == y - 4
)
{
strcat(buff, GREEN "]/");
goto bottom;
}
else if // If its the center of the pipe
(
pipes[i].x == x &&
(
pipes[i].y <= y -4 ||
pipes[i].y >= y +4
)
)
{
strcat(buff, GREEN "][");
goto bottom;
}
else if // If its the left angle of the bottom pipe
(
pipes[i].x == x +1 &&
pipes[i].y == y - 4
)
{
strcat(buff, GREEN "\\[");
goto bottom;
}
else if // If its the right angle of the top pipe
(
pipes[i].x == x -1 &&
pipes[i].y == y + 4
)
{
strcat(buff, GREEN "]\\");
goto bottom;
}
else if // If its the left angle of the top pipe
(
pipes[i].x == x +1 &&
pipes[i].y == y + 4
)
{
strcat(buff, GREEN "/[");
goto bottom;
}
else if // If its the left side of the pipe
(
pipes[i].x == x +1 &&
(
pipes[i].y <= y -5 ||
pipes[i].y >= y +5
)
)
{
strcat(buff, GREEN " [");
goto bottom;
}
else if // If its the right side of the pipe
(
pipes[i].x == x -1 &&
(
pipes[i].y <= y -5 ||
pipes[i].y >= y +5
)
)
{
strcat(buff, GREEN "] ");
goto bottom;
}
}
// The next bit will simply draw the bird in yellow based on x,y offsets
if
(
bird.y == y &&
bird.x == x
)
{
strcat(buff, YELLOW ")>");
}
else if
(
bird.y == y &&
bird.x == x +1
)
{
strcat(buff, YELLOW "_(");
}
else if
(
bird.y == y &&
bird.x == x +2)
{
strcat(buff, YELLOW " _");
}
else if
(
bird.y == y -1 &&
bird.x == x
)
{
strcat(buff, YELLOW ") ");
}
else if
(
bird.y == y -1 &&
bird.x == x +1
)
{
strcat(buff, YELLOW "__");
}
else if
(
bird.y == y -1 &&
bird.x == x +2
)
{
strcat(buff, YELLOW " \\");
}
else // If its non of the other parts
{
strcat(buff, NC " ");
}
bottom:; // The point moved to with "goto bottom;"
}
strcat(buff, "\n"); // Append a new line to the buffer
}
printf(buff); // Write the buffer
}
void Pipes()
{
for (int i = 0; i < pipeCount; i++)
{
if (pipes[i].x == -1) // If the pipe is of screen
{
// If i = 0 then set pipes[i].x = pipes[2].x +15 else set pipes[i].x = pipes[i -1].x + 15
// We do this so the distance between the pipes is alwas 15
(i == 0) ? (pipes[i].x = pipes[2].x +15) : (pipes[i].x = pipes[i - 1].x +15);
pipes[i].y = (rand()%7) +5; // Set the pipes y to a random number between 5 and 11
}
}
}
void HitTest()
{
if (bird.y == 15) // If the bird is on the floor
{
exit(0);
}
for (int i = 0; i < pipeCount; i++)
{
/*
The next 2 ifs are collision detection.
With the 2 simple diagrams bellow A is the bird and B is the pipe
A1 A2
+--+
| |
+--+
A3
B1 B2
+--+
| |
+--+
B3
*/
if (
(bird.x -2 < pipes[i].x +2) && // A1 < B2
(bird.x > pipes[i].x -2) && // A2 > B1
(
(bird.y < pipes[i].y -2) || // A3 < B3
(bird.y > pipes[i].y +1) // A3 > B3
)
)
{
exit(0);
}
}
}
int main()
{
srand(time(NULL)); // Sets the seed for the random number generator to the current UNIX time stamp
system("title \"Not Flappy Duck\"");
bird.x = 10; // Set the birds start position
bird.y = 10;
for (int i = 0; i < pipeCount; i++)
{
pipes[i].x = 25 + 15 * i; // Set the pipes x to be spaces 15 blocks appart
pipes[i].y = (rand()%7) +5; // Set the pipes y to a random number between 5 and 11
}
int frame = 0; // Variable to hold the passed frames
printf("Press UP to jump and Q to quit.\n"); // List the controls
for (int i = 0; i <= ySize; i++) // Makes space for the game
{
printf("\n");
}
Draw();
system("pause>nul"); // Pause untill the user presses a key without showing a prompt
while (1)
{
if (GetAsyncKeyState(VK_UP)) // If the user is pressing the up arrow
{
bird.y -= 2; // Move the bird up 2 pixels
}
if (GetAsyncKeyState(qKey)) // If the user is pressing Q
{
break;
}
if (frame == 2) // If its the third frame
{
bird.y++; // Drop the bird by 1 pixel
for (int i = 0; i < 3; i++) // Move the pipes forwards
{
pipes[i].x--;
}
frame = 0; // Reset the frames
}
HitTest(); // Test for collisions
Draw(); // Draw the game
Pipes(); // Update the pipes
frame++;
Sleep(100); // Wait 100 milliseconds (This may need to be tuned on faster and slower machines as -Os was enough to break it for me)
}
return 0;
}
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