barra
/
Spacewar
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Adapted the previous example to do basic gravity and bouncing.

This commit is contained in:
Barra Ó Catháin 2023-03-15 23:24:42 +00:00
parent 53a88025cd
commit 6f966fec57
1 changed files with 14 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
SDL2-Experiment-03.c → SDL2-Experiment-04.c
View File

@ -1,4 +1,4 @@
// SDL Experiment 03, Barra Ó Catháin.
// SDL Experiment 04, Barra Ó Catháin.
// ===================================
#include <SDL2/SDL.h>
#include <SDL2/SDL_timer.h>
@ -181,18 +181,12 @@ int main(int argc, char ** argv)
{
velocityX = 10;
}
if(velocityY > 10)
{
velocityY = 10;
}
if(velocityX < -10)
{
velocityX = -10;
}
if(velocityY < -10)
{
velocityY = -10;
}
// Deccelerate:
if(velocityX != 0)
@ -200,10 +194,16 @@ int main(int argc, char ** argv)
velocityX = (velocityX < 0) ? velocityX + 1 : velocityX - 1;
}
if(velocityY != 0)
if(positionY < 640)
{
velocityY = (velocityY < 0) ? velocityY + 1 : velocityY - 1;
velocityY += 1;
}
if(positionY >= 640 && velocityY !=0 && !accelUp)
{
velocityY *= -1;
velocityY += 1;
}
// Move the position:
if(velocityX != 0)
@ -211,11 +211,11 @@ int main(int argc, char ** argv)
positionX += velocityX;
if(positionX < 0)
{
positionX = 0;
positionX = 640;
}
if(positionX > 640)
{
positionX = 640;
positionX = 0;
}
}
if(velocityY != 0)
@ -243,9 +243,6 @@ int main(int argc, char ** argv)
// Set the colour to yellow:
SDL_SetRenderDrawColor(renderer, 255, 255, 0, 255);
// Draw a line from the center of the window to the position pointer:
SDL_RenderDrawLine(renderer, width/2, height/2, positionX, positionY);
// Draw a circle around the position pointer:
DrawCircle(renderer, positionX, positionY, 15);
@ -259,5 +256,5 @@ int main(int argc, char ** argv)
}
// ===========================================================================================
// Local Variables:
// compile-command: "gcc `sdl2-config --libs --cflags` SDL2-Experiment-03.c -lm"
// compile-command: "gcc `sdl2-config --libs --cflags` SDL2-Experiment-04.c -lm"
// End: