Added a basic client which tracks the second ship through UDP
This commit is contained in:
parent
5edab8d33c
commit
e2f6e993c5
|
Before Width: | Height: | Size: 6.5 KiB After Width: | Height: | Size: 6.5 KiB |
|
Before Width: | Height: | Size: 1023 B After Width: | Height: | Size: 1023 B |
|
Before Width: | Height: | Size: 992 B After Width: | Height: | Size: 992 B |
|
Before Width: | Height: | Size: 1004 B After Width: | Height: | Size: 1004 B |
|
Before Width: | Height: | Size: 981 B After Width: | Height: | Size: 981 B |
|
|
@ -0,0 +1,228 @@
|
|||
// SDL Experiment 15, Barra Ó Catháin.
|
||||
// ===================================
|
||||
#include <SDL2/SDL.h>
|
||||
#include <SDL2/SDL_image.h>
|
||||
#include <SDL2/SDL_timer.h>
|
||||
#include <math.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdint.h>
|
||||
#include <sys/types.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
|
||||
// A 2D vector:
|
||||
typedef struct xyVector
|
||||
{
|
||||
double xComponent;
|
||||
double yComponent;
|
||||
} xyVector;
|
||||
|
||||
// A struct storing the needed data to draw a ship:
|
||||
typedef struct ship
|
||||
{
|
||||
SDL_Rect rectangle;
|
||||
xyVector position;
|
||||
xyVector velocity;
|
||||
xyVector gravity;
|
||||
int number;
|
||||
} ship;
|
||||
|
||||
// Get the angle between vectors:
|
||||
static inline double angleBetweenVectors(xyVector * vectorA, xyVector * vectorB)
|
||||
{
|
||||
double dotProduct = (vectorA->xComponent * vectorB->xComponent) + (vectorA->yComponent * vectorB->yComponent);
|
||||
double determinant = (vectorA->xComponent * vectorB->yComponent) - (vectorA->yComponent * vectorB->xComponent);
|
||||
|
||||
return atan2(dotProduct, determinant) / 0.01745329;
|
||||
}
|
||||
|
||||
void DrawCircle(SDL_Renderer * renderer, int32_t centreX, int32_t centreY, int32_t radius)
|
||||
{
|
||||
const int32_t diameter = (radius * 2);
|
||||
|
||||
int32_t x = (radius - 1);
|
||||
int32_t y = 0;
|
||||
int32_t tx = 1;
|
||||
int32_t ty = 1;
|
||||
int32_t error = (tx - diameter);
|
||||
|
||||
while (x >= y)
|
||||
{
|
||||
// Each of the following renders an octant of the circle
|
||||
SDL_RenderDrawPoint(renderer, centreX + x, centreY - y);
|
||||
SDL_RenderDrawPoint(renderer, centreX + x, centreY + y);
|
||||
SDL_RenderDrawPoint(renderer, centreX - x, centreY - y);
|
||||
SDL_RenderDrawPoint(renderer, centreX - x, centreY + y);
|
||||
SDL_RenderDrawPoint(renderer, centreX + y, centreY - x);
|
||||
SDL_RenderDrawPoint(renderer, centreX + y, centreY + x);
|
||||
SDL_RenderDrawPoint(renderer, centreX - y, centreY - x);
|
||||
SDL_RenderDrawPoint(renderer, centreX - y, centreY + x);
|
||||
|
||||
if (error <= 0)
|
||||
{
|
||||
++y;
|
||||
error += ty;
|
||||
ty += 2;
|
||||
}
|
||||
|
||||
if (error > 0)
|
||||
{
|
||||
--x;
|
||||
tx += 2;
|
||||
error += (tx - diameter);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int main(int argc, char ** argv)
|
||||
{
|
||||
SDL_Event event;
|
||||
bool quit = false;
|
||||
int width = 0, height = 0;
|
||||
uint32_t rendererFlags = SDL_RENDERER_ACCELERATED;
|
||||
uint64_t thisFrameTime = SDL_GetPerformanceCounter(), lastFrameTime = 0;
|
||||
long positionX = 512, positionY = 512, starPositionX = 0, starPositionY = 0;
|
||||
xyVector positionVector = {512, 512}, velocityVector = {1, 0}, gravityVector = {0, 0},
|
||||
engineVector = {0.04, 0}, upVector = {0, 0.1}, starPosition = {0, 0};
|
||||
|
||||
// Create the socket:
|
||||
int socketFileDesc = socket(AF_INET, SOCK_DGRAM, 0);
|
||||
if (socketFileDesc < 0)
|
||||
{
|
||||
fprintf(stderr, "\tSocket Creation is:\t\033[33;40mRED.\033[0m Aborting launch.\n");
|
||||
exit(0);
|
||||
}
|
||||
printf("\tSocket Creation is:\t\033[32;40mGREEN.\033[0m\n");
|
||||
|
||||
// Make the socket timeout:
|
||||
struct timeval read_timeout;
|
||||
read_timeout.tv_sec = 0;
|
||||
read_timeout.tv_usec = 10;
|
||||
setsockopt(socketFileDesc, SOL_SOCKET, SO_RCVTIMEO, &read_timeout, sizeof read_timeout);
|
||||
|
||||
// Create and fill the information needed to bind to the socket:
|
||||
struct sockaddr_in serverAddress;
|
||||
memset(&serverAddress, 0, sizeof(serverAddress));
|
||||
serverAddress.sin_family = AF_INET; // IPv4
|
||||
serverAddress.sin_addr.s_addr = INADDR_ANY;
|
||||
serverAddress.sin_port = htons(12000);
|
||||
|
||||
// Bind to the socket:
|
||||
if (bind(socketFileDesc, (const struct sockaddr *)&serverAddress, sizeof(serverAddress)) < 0)
|
||||
{
|
||||
perror("bind failed");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
// Get the initial
|
||||
ship shipA;
|
||||
ship shipB;
|
||||
|
||||
// Initialize the SDL library, video, sound, and input:
|
||||
if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
|
||||
{
|
||||
printf("SDL Initialization Error: %s\n", SDL_GetError());
|
||||
}
|
||||
|
||||
// Initialize image loading:
|
||||
IMG_Init(IMG_INIT_PNG);
|
||||
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "2");
|
||||
|
||||
// Create an SDL window and rendering context in that window:
|
||||
SDL_Window * window = SDL_CreateWindow("SDL_TEST", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 700, 700, 0);
|
||||
SDL_Renderer * renderer = SDL_CreateRenderer(window, -1, rendererFlags);
|
||||
SDL_SetWindowTitle(window, "Spacewar!");
|
||||
|
||||
// Load in all of our textures:
|
||||
SDL_Texture * idleTexture, * acceleratingTexture, * clockwiseTexture, * anticlockwiseTexture, * currentTexture,
|
||||
* acceleratingTexture2;
|
||||
|
||||
idleTexture = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Idle.png");
|
||||
clockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Clockwise.png");
|
||||
acceleratingTexture = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Accelerating.png");
|
||||
anticlockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Anticlockwise.png");
|
||||
acceleratingTexture2 = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Accelerating-Frame-2.png");
|
||||
|
||||
// Enable resizing the window:
|
||||
SDL_SetWindowResizable(window, SDL_TRUE);
|
||||
ship Temp;
|
||||
bool shipAUpdated, shipBUpdated;
|
||||
while (!quit)
|
||||
{
|
||||
while(!(shipAUpdated && shipBUpdated))
|
||||
{
|
||||
// Receive data from the socket:
|
||||
recvfrom(socketFileDesc, &Temp, sizeof(ship), 0, NULL, NULL);
|
||||
if(Temp.number == 0)
|
||||
{
|
||||
shipA = Temp;
|
||||
shipAUpdated = true;
|
||||
}
|
||||
if(Temp.number == 1)
|
||||
{
|
||||
shipB = Temp;
|
||||
shipBUpdated = true;
|
||||
}
|
||||
}
|
||||
|
||||
// Check if the user wants to quit:
|
||||
while (SDL_PollEvent(&event))
|
||||
{
|
||||
switch (event.type)
|
||||
{
|
||||
case SDL_QUIT:
|
||||
{
|
||||
quit = true;
|
||||
break;
|
||||
}
|
||||
default:
|
||||
{
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Store the window's current width and height:
|
||||
SDL_GetWindowSize(window, &width, &height);
|
||||
|
||||
// Set the texture to idle:
|
||||
currentTexture = idleTexture;
|
||||
|
||||
// Calculate the position of the sprites:
|
||||
shipB.rectangle.x = (width/2) - 16 - (shipB.velocity.xComponent * 15);
|
||||
shipB.rectangle.y = (height/2) - 16 - (shipB.velocity.yComponent * 15);
|
||||
|
||||
shipA.rectangle.x = (long)((((shipA.position.xComponent - shipB.position.xComponent) - 32) + width/2) - (shipB.velocity.xComponent * 15));
|
||||
shipA.rectangle.y = (long)((((shipA.position.yComponent - shipB.position.yComponent) - 32) + height/2) - (shipB.velocity.yComponent * 15));
|
||||
|
||||
// Set the colour to black:
|
||||
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
|
||||
|
||||
// Clear the screen, filling it with black:
|
||||
SDL_RenderClear(renderer);
|
||||
|
||||
// Draw the ship:
|
||||
SDL_RenderCopyEx(renderer, currentTexture, NULL, &shipA.rectangle,
|
||||
angleBetweenVectors(&shipA.velocity, &upVector) + 90, NULL, 0);
|
||||
SDL_RenderCopyEx(renderer, currentTexture, NULL, &shipB.rectangle,
|
||||
angleBetweenVectors(&shipB.velocity, &upVector) + 90, NULL, 0);
|
||||
|
||||
// Set the colour to yellow:
|
||||
SDL_SetRenderDrawColor(renderer, 255, 255, 0, 255);
|
||||
|
||||
// Draw a circle as the star:
|
||||
DrawCircle(renderer, (long)(starPositionX - shipB.position.xComponent) + width/2 - (shipB.velocity.xComponent * 15),
|
||||
(long)(starPositionY - shipB.position.yComponent) + height/2 - (shipB.velocity.yComponent * 15), 50);
|
||||
|
||||
// Present the rendered graphics:
|
||||
SDL_RenderPresent(renderer);
|
||||
shipAUpdated = false;
|
||||
shipBUpdated = false;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
// ========================================================================================================
|
||||
// Local Variables:
|
||||
// compile-command: "gcc `sdl2-config --libs --cflags` SDL2-Experiment-15-Client.c -lSDL2_image -lm -o 'Spacewar Client!'"
|
||||
// End:
|
||||
50
Spacewar.c
50
Spacewar.c
|
|
@ -1,4 +1,4 @@
|
|||
// SDL Experiment 14, Barra Ó Catháin.
|
||||
// SDL Experiment 15, Barra Ó Catháin.
|
||||
// ===================================
|
||||
#include <SDL2/SDL.h>
|
||||
#include <SDL2/SDL_image.h>
|
||||
|
|
@ -6,6 +6,10 @@
|
|||
#include <math.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdint.h>
|
||||
#include <sys/types.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
|
||||
// A 2D vector:
|
||||
typedef struct xyVector
|
||||
|
|
@ -21,6 +25,7 @@ typedef struct ship
|
|||
xyVector position;
|
||||
xyVector velocity;
|
||||
xyVector gravity;
|
||||
int number;
|
||||
} ship;
|
||||
|
||||
// Calculate the vector from point A to point B:
|
||||
|
|
@ -133,11 +138,11 @@ void calculateGravity(xyVector * starPosition, ship * shipUnderGravity)
|
|||
{
|
||||
if(gravityMagnitude >= 116)
|
||||
{
|
||||
gravityAcceleration = 0.67 * (50000 / (pow(gravityMagnitude, 2)));
|
||||
gravityAcceleration = pow(2, (2500 / (pow(gravityMagnitude, 2)))) / 10;
|
||||
}
|
||||
else
|
||||
{
|
||||
gravityAcceleration = 1;
|
||||
gravityAcceleration = pow(2, (2500 / (pow(gravityMagnitude, 2)))) / 5;
|
||||
}
|
||||
}
|
||||
else
|
||||
|
|
@ -155,7 +160,7 @@ void calculateGravity(xyVector * starPosition, ship * shipUnderGravity)
|
|||
}
|
||||
|
||||
// Create a ship with the given parameters:
|
||||
ship createShip(int width, int height, double positionX, double positionY, double velocityX, double velocityY)
|
||||
ship createShip(int width, int height, double positionX, double positionY, double velocityX, double velocityY, int number)
|
||||
{
|
||||
ship newShip;
|
||||
newShip.rectangle.w = width;
|
||||
|
|
@ -166,6 +171,7 @@ ship createShip(int width, int height, double positionX, double positionY, doubl
|
|||
newShip.velocity.yComponent = velocityY;
|
||||
newShip.gravity.xComponent = 0;
|
||||
newShip.gravity.yComponent = 0;
|
||||
newShip.number = number;
|
||||
return newShip;
|
||||
}
|
||||
|
||||
|
|
@ -179,11 +185,26 @@ int main(int argc, char ** argv)
|
|||
double deltaTime = 0, gravityMagnitude = 0, gravityAcceleration = 0, frameAccumulator = 0;
|
||||
bool quit = false, rotatingClockwise = false, rotatingAnticlockwise = false, accelerating = false;
|
||||
xyVector positionVector = {512, 512}, velocityVector = {1, 0}, gravityVector = {0, 0},
|
||||
engineVector = {0.04, 0}, upVector = {0, 0.1}, starPosition = {0, 0};
|
||||
engineVector = {0.08, 0}, upVector = {0, 0.1}, starPosition = {0, 0};
|
||||
|
||||
// Create the socket:
|
||||
int socketFileDesc = socket(AF_INET, SOCK_DGRAM, 0);
|
||||
if (socketFileDesc < 0)
|
||||
{
|
||||
fprintf(stderr, "\tSocket Creation is:\t\033[33;40mRED.\033[0m Aborting launch.\n");
|
||||
exit(0);
|
||||
}
|
||||
printf("\tSocket Creation is:\t\033[32;40mGREEN.\033[0m\n");
|
||||
|
||||
// Create and fill the information needed to bind to the socket:
|
||||
struct sockaddr_in serverAddress;
|
||||
serverAddress.sin_family = AF_INET; // IPv4
|
||||
serverAddress.sin_addr.s_addr = inet_addr("127.0.0.1");
|
||||
serverAddress.sin_port = htons(12000);
|
||||
|
||||
// Get the initial
|
||||
ship shipA = createShip(32, 32, 512, 512, 1, 0);
|
||||
ship shipB = createShip(32, 32, -512, -512, 0, 1);
|
||||
ship shipA = createShip(32, 32, 512, 512, 1, 0, 0);
|
||||
ship shipB = createShip(32, 32, -512, -512, 0, 1, 1);
|
||||
|
||||
// Initialize the SDL library, video, sound, and input:
|
||||
if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
|
||||
|
|
@ -204,11 +225,11 @@ int main(int argc, char ** argv)
|
|||
SDL_Texture * idleTexture, * acceleratingTexture, * clockwiseTexture, * anticlockwiseTexture, * currentTexture,
|
||||
* acceleratingTexture2;
|
||||
|
||||
idleTexture = IMG_LoadTexture(renderer, "./Experiment-14-Images/Ship-Idle.png");
|
||||
clockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-14-Images/Ship-Clockwise.png");
|
||||
acceleratingTexture = IMG_LoadTexture(renderer, "./Experiment-14-Images/Ship-Accelerating.png");
|
||||
anticlockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-14-Images/Ship-Anticlockwise.png");
|
||||
acceleratingTexture2 = IMG_LoadTexture(renderer, "./Experiment-14-Images/Ship-Accelerating-Frame-2.png");
|
||||
idleTexture = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Idle.png");
|
||||
clockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Clockwise.png");
|
||||
acceleratingTexture = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Accelerating.png");
|
||||
anticlockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Anticlockwise.png");
|
||||
acceleratingTexture2 = IMG_LoadTexture(renderer, "./Experiment-15-Images/Ship-Accelerating-Frame-2.png");
|
||||
|
||||
// Enable resizing the window:
|
||||
SDL_SetWindowResizable(window, SDL_TRUE);
|
||||
|
|
@ -415,10 +436,13 @@ int main(int argc, char ** argv)
|
|||
|
||||
// Present the rendered graphics:
|
||||
SDL_RenderPresent(renderer);
|
||||
|
||||
sendto(socketFileDesc, &shipA, sizeof(ship), 0, (const struct sockaddr *)&serverAddress, sizeof(serverAddress));
|
||||
sendto(socketFileDesc, &shipB, sizeof(ship), 0, (const struct sockaddr *)&serverAddress, sizeof(serverAddress));
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
// ========================================================================================================
|
||||
// Local Variables:
|
||||
// compile-command: "gcc `sdl2-config --libs --cflags` SDL2-Experiment-14.c -lSDL2_image -lm -o 'Spacewar!'"
|
||||
// compile-command: "gcc `sdl2-config --libs --cflags` SDL2-Experiment-15.c -lSDL2_image -lm -o 'Spacewar!'"
|
||||
// End:
|
||||
|
|
|
|||
Loading…
Reference in New Issue