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Added basic gamepad support.

This commit is contained in:
Barra Ó Catháin 2023-03-20 14:36:10 +00:00
parent e2f6e993c5
commit f3096e1a54
7 changed files with 83 additions and 19 deletions
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Experiment-15-Images/Ship-Accelerating-Frame-2.png → Experiment-16-Images/Ship-Accelerating-Frame-2.png
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Experiment-15-Images/Ship-Accelerating.png → Experiment-16-Images/Ship-Accelerating.png
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Experiment-15-Images/Ship-Anticlockwise.png → Experiment-16-Images/Ship-Anticlockwise.png
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Experiment-15-Images/Ship-Clockwise.png → Experiment-16-Images/Ship-Clockwise.png
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Experiment-15-Images/Ship-Idle.png → Experiment-16-Images/Ship-Idle.png
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Spacewar-Client.c
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@ -1,4 +1,4 @@
// SDL Experiment 15, Barra Ó Catháin.
// SDL Experiment 16, Barra Ó Catháin.
// ===================================
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
@ -138,11 +138,11 @@ int main(int argc, char ** argv)
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");
idleTexture = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Idle.png");
clockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Clockwise.png");
acceleratingTexture = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Accelerating.png");
anticlockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Anticlockwise.png");
acceleratingTexture2 = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Accelerating-Frame-2.png");
// Enable resizing the window:
SDL_SetWindowResizable(window, SDL_TRUE);
@ -224,5 +224,5 @@ int main(int argc, char ** argv)
}
// ========================================================================================================
// Local Variables:
// compile-command: "gcc `sdl2-config --libs --cflags` SDL2-Experiment-15-Client.c -lSDL2_image -lm -o 'Spacewar Client!'"
// compile-command: "gcc `sdl2-config --libs --cflags` SDL2-Experiment-16-Client.c -lSDL2_image -lm -o 'Spacewar Client!'"
// End:

88
Spacewar.c
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@ -1,4 +1,4 @@
// SDL Experiment 15, Barra Ó Catháin.
// SDL Experiment 16, Barra Ó Catháin.
// ===================================
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
@ -142,7 +142,7 @@ void calculateGravity(xyVector * starPosition, ship * shipUnderGravity)
}
else
{
gravityAcceleration = pow(2, (2500 / (pow(gravityMagnitude, 2)))) / 5;
gravityAcceleration = 1;
}
}
else
@ -202,7 +202,6 @@ int main(int argc, char ** argv)
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, 0);
ship shipB = createShip(32, 32, -512, -512, 0, 1, 1);
@ -212,6 +211,22 @@ int main(int argc, char ** argv)
printf("SDL Initialization Error: %s\n", SDL_GetError());
}
// Check for joysticks:
SDL_Joystick* controller = NULL;
if (SDL_NumJoysticks() < 1 )
{
printf( "Warning: No joysticks connected!\n" );
}
else
{
// Load joystick
controller = SDL_JoystickOpen(0);
if (controller == NULL )
{
printf( "Warning: Unable to open game controller! SDL Error: %s\n", SDL_GetError() );
}
}
// Initialize image loading:
IMG_Init(IMG_INIT_PNG);
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "2");
@ -225,11 +240,11 @@ int main(int argc, char ** argv)
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");
idleTexture = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Idle.png");
clockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Clockwise.png");
acceleratingTexture = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Accelerating.png");
anticlockwiseTexture = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Anticlockwise.png");
acceleratingTexture2 = IMG_LoadTexture(renderer, "./Experiment-16-Images/Ship-Accelerating-Frame-2.png");
// Enable resizing the window:
SDL_SetWindowResizable(window, SDL_TRUE);
@ -239,6 +254,36 @@ int main(int argc, char ** argv)
lastFrameTime = thisFrameTime;
thisFrameTime = SDL_GetPerformanceCounter();
deltaTime = (double)(((thisFrameTime - lastFrameTime) * 1000) / (double)SDL_GetPerformanceFrequency());
// Check for left movement on the stick:
if (SDL_JoystickGetAxis(controller, 0) < -2500)
{
rotatingAnticlockwise = true;
}
else
{
rotatingAnticlockwise = false;
}
// Check for right movement on the stick:
if (SDL_JoystickGetAxis(controller, 0) > 2500)
{
rotatingClockwise = true;
}
else
{
rotatingClockwise = false;
}
// Check for movement on the right trigger:
if (SDL_JoystickGetAxis(controller, 5) > 2500)
{
accelerating = true;
}
else
{
accelerating = false;
}
// Check if the user wants to quit:
while (SDL_PollEvent(&event))
@ -309,7 +354,7 @@ int main(int argc, char ** argv)
}
}
}
// Wrap the positions if the ship goes interstellar:
if(shipA.position.xComponent > 4096)
{
@ -362,12 +407,28 @@ int main(int argc, char ** argv)
// Rotate the engine vector if needed:
if(rotatingClockwise)
{
rotateXYVector(&engineVector, 0.25 * deltaTime);
if (SDL_JoystickGetAxis(controller, 0) > 2500)
{
double rotationalSpeed = ((double)SDL_JoystickGetAxis(controller, 0) / 20000) * -1;
rotateXYVector(&engineVector, -0.25 * deltaTime * rotationalSpeed);
}
else
{
rotateXYVector(&engineVector, 0.25 * deltaTime);
}
currentTexture = clockwiseTexture;
}
if(rotatingAnticlockwise)
{
rotateXYVector(&engineVector, -0.25 * deltaTime);
if (SDL_JoystickGetAxis(controller, 0) < -2500)
{
double rotationalSpeed = ((double)SDL_JoystickGetAxis(controller, 0) / 20000) * -1;
rotateXYVector(&engineVector, -0.25 * deltaTime * rotationalSpeed);
}
else
{
rotateXYVector(&engineVector, -0.25 * deltaTime);
}
currentTexture = anticlockwiseTexture;
}
@ -377,7 +438,10 @@ int main(int argc, char ** argv)
if(accelerating)
{
xyVector temporary = engineVector;
multiplyXYVector(&engineVector, SDL_JoystickGetAxis(controller, 5) / 30000);
addXYVectorDeltaScaled(&shipA.velocity, &engineVector, deltaTime);
engineVector = temporary;
frameAccumulator += deltaTime;
currentTexture = acceleratingTexture;
if((long)frameAccumulator % 4)
@ -444,5 +508,5 @@ int main(int argc, char ** argv)
}
// ========================================================================================================
// Local Variables:
// compile-command: "gcc `sdl2-config --libs --cflags` SDL2-Experiment-15.c -lSDL2_image -lm -o 'Spacewar!'"
// compile-command: "gcc `sdl2-config --libs --cflags` SDL2-Experiment-16.c -lSDL2_image -lm -o 'Spacewar!'"
// End: