Mixing
Creating multiple rectangles using SDL_Rect
0
I'm creating a simulation for Conway's game of life using C and SDL. To represent the alive cells I would like to create multiple rectangles in the window which I have created. Is there any way to call SDL_Rect in a for loop without redefintion of SDL_Rect and output the result of the for loop all on the same renderer? Thank you.
My Code:
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
#include <stdbool.h>
#include <SDL.h>
#define main SDL_main
#undef main
double CreateRectanglesX()
{
double x; double x_max = 640; double x_min = 20;
x = rand() / (x_max - x_min) / (double)RAND_MAX + x_min;
return x;
}
double CreateRectanglesY()
{
double y; double y_max = 480; double y_min = 20;
y = rand() / (y_max - y_min) / (double)RAND_MAX + y_min;
return y;
}
int main(int argc, char* argv)
{
SDL_Init(SDL_INIT_VIDEO); //initializes the SDL/SDL2 window
SDL_Window *screen; //SDL window created with pointer
screen = SDL_CreateWindow("My Program Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_OPENGL);
//definition for pointer - dimensions of SDL window
SDL_Renderer *renderer; //Renderer created with pointer
renderer = SDL_CreateRenderer(screen, -1, SDL_RENDERER_ACCELERATED); //definition for pointer - still to learn
if (screen == NULL) //checks if window exists or not
{
printf("Could not create window: %sn", SDL_GetError()); //returns error if window doesn't exsit
return 1;
}
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); //changes color of renderer
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer); //displays the renderer with the changed color
for (int i = 0; i < 5; i++)
{
double x = CreateRectanglesX();
double y = CreateRectanglesY();
printf("%lf %lf", x, y);
SDL_Rect a;
a.x = x;
a.y = y;
a.w = 20;
a.h = 20;
SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
SDL_RenderFillRect(renderer, &a);
SDL_RenderPresent(renderer);
}
SDL_Delay(5000); //wait time for window
SDL_DestroyWindow(screen);
SDL_QUIT;
return EXIT_SUCCESS;
}
c sdl
asked Jan 1 at 13:27
Siddharth MurpaniSiddharth Murpani
112
add a comment |
0
I'm creating a simulation for Conway's game of life using C and SDL. To represent the alive cells I would like to create multiple rectangles in the window which I have created. Is there any way to call SDL_Rect in a for loop without redefintion of SDL_Rect and output the result of the for loop all on the same renderer? Thank you.
My Code:
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
#include <stdbool.h>
#include <SDL.h>
#define main SDL_main
#undef main
double CreateRectanglesX()
{
double x; double x_max = 640; double x_min = 20;
x = rand() / (x_max - x_min) / (double)RAND_MAX + x_min;
return x;
}
double CreateRectanglesY()
{
double y; double y_max = 480; double y_min = 20;
y = rand() / (y_max - y_min) / (double)RAND_MAX + y_min;
return y;
}
int main(int argc, char* argv)
{
SDL_Init(SDL_INIT_VIDEO); //initializes the SDL/SDL2 window
SDL_Window *screen; //SDL window created with pointer
screen = SDL_CreateWindow("My Program Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_OPENGL);
//definition for pointer - dimensions of SDL window
SDL_Renderer *renderer; //Renderer created with pointer
renderer = SDL_CreateRenderer(screen, -1, SDL_RENDERER_ACCELERATED); //definition for pointer - still to learn
if (screen == NULL) //checks if window exists or not
{
printf("Could not create window: %sn", SDL_GetError()); //returns error if window doesn't exsit
return 1;
}
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); //changes color of renderer
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer); //displays the renderer with the changed color
for (int i = 0; i < 5; i++)
{
double x = CreateRectanglesX();
double y = CreateRectanglesY();
printf("%lf %lf", x, y);
SDL_Rect a;
a.x = x;
a.y = y;
a.w = 20;
a.h = 20;
SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
SDL_RenderFillRect(renderer, &a);
SDL_RenderPresent(renderer);
}
SDL_Delay(5000); //wait time for window
SDL_DestroyWindow(screen);
SDL_QUIT;
return EXIT_SUCCESS;
}
c sdl
asked Jan 1 at 13:27
Siddharth MurpaniSiddharth Murpani
112
" //all appropriate includes are there", please type them for us and make a Minimal, Complete, and Verifiable example.
– Yunnosch
Jan 1 at 13:36
Please elaborate what keeps you from doing exactly as you described: Use the code which you currently use to make one rectangle inside a loop to do several. You are aware which code that is, aren't you? Can you highlight that part of the code, e.g. with comments "rectangle start" and "rectangle end"?
– Yunnosch
Jan 1 at 16:01
The code you show demonstrates how you successfully create a single rectangle, doesn't it? Could you show your (unsuccessful) attempt to create multiple? Try to make a Minimal, Complete, and Verifiable example of that.
– Yunnosch
Jan 1 at 16:03
add a comment |
0
0
0
0
I'm creating a simulation for Conway's game of life using C and SDL. To represent the alive cells I would like to create multiple rectangles in the window which I have created. Is there any way to call SDL_Rect in a for loop without redefintion of SDL_Rect and output the result of the for loop all on the same renderer? Thank you.
My Code:
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
#include <stdbool.h>
#include <SDL.h>
#define main SDL_main
#undef main
double CreateRectanglesX()
{
double x; double x_max = 640; double x_min = 20;
x = rand() / (x_max - x_min) / (double)RAND_MAX + x_min;
return x;
}
double CreateRectanglesY()
{
double y; double y_max = 480; double y_min = 20;
y = rand() / (y_max - y_min) / (double)RAND_MAX + y_min;
return y;
}
int main(int argc, char* argv)
{
SDL_Init(SDL_INIT_VIDEO); //initializes the SDL/SDL2 window
SDL_Window *screen; //SDL window created with pointer
screen = SDL_CreateWindow("My Program Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_OPENGL);
//definition for pointer - dimensions of SDL window
SDL_Renderer *renderer; //Renderer created with pointer
renderer = SDL_CreateRenderer(screen, -1, SDL_RENDERER_ACCELERATED); //definition for pointer - still to learn
if (screen == NULL) //checks if window exists or not
{
printf("Could not create window: %sn", SDL_GetError()); //returns error if window doesn't exsit
return 1;
}
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); //changes color of renderer
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer); //displays the renderer with the changed color
for (int i = 0; i < 5; i++)
{
double x = CreateRectanglesX();
double y = CreateRectanglesY();
printf("%lf %lf", x, y);
SDL_Rect a;
a.x = x;
a.y = y;
a.w = 20;
a.h = 20;
SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
SDL_RenderFillRect(renderer, &a);
SDL_RenderPresent(renderer);
}
SDL_Delay(5000); //wait time for window
SDL_DestroyWindow(screen);
SDL_QUIT;
return EXIT_SUCCESS;
}
c sdl
asked Jan 1 at 13:27
Siddharth MurpaniSiddharth Murpani
112
I'm creating a simulation for Conway's game of life using C and SDL. To represent the alive cells I would like to create multiple rectangles in the window which I have created. Is there any way to call SDL_Rect in a for loop without redefintion of SDL_Rect and output the result of the for loop all on the same renderer? Thank you.
My Code:
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
#include <stdbool.h>
#include <SDL.h>
#define main SDL_main
#undef main
double CreateRectanglesX()
{
double x; double x_max = 640; double x_min = 20;
x = rand() / (x_max - x_min) / (double)RAND_MAX + x_min;
return x;
}
double CreateRectanglesY()
{
double y; double y_max = 480; double y_min = 20;
y = rand() / (y_max - y_min) / (double)RAND_MAX + y_min;
return y;
}
int main(int argc, char* argv)
{
SDL_Init(SDL_INIT_VIDEO); //initializes the SDL/SDL2 window
SDL_Window *screen; //SDL window created with pointer
screen = SDL_CreateWindow("My Program Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_OPENGL);
//definition for pointer - dimensions of SDL window
SDL_Renderer *renderer; //Renderer created with pointer
renderer = SDL_CreateRenderer(screen, -1, SDL_RENDERER_ACCELERATED); //definition for pointer - still to learn
if (screen == NULL) //checks if window exists or not
{
printf("Could not create window: %sn", SDL_GetError()); //returns error if window doesn't exsit
return 1;
}
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); //changes color of renderer
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer); //displays the renderer with the changed color
for (int i = 0; i < 5; i++)
{
double x = CreateRectanglesX();
double y = CreateRectanglesY();
printf("%lf %lf", x, y);
SDL_Rect a;
a.x = x;
a.y = y;
a.w = 20;
a.h = 20;
SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
SDL_RenderFillRect(renderer, &a);
SDL_RenderPresent(renderer);
}
SDL_Delay(5000); //wait time for window
SDL_DestroyWindow(screen);
SDL_QUIT;
return EXIT_SUCCESS;
}
c sdl
c sdl
asked Jan 1 at 13:27
Siddharth MurpaniSiddharth Murpani
112
asked Jan 1 at 13:27
Siddharth MurpaniSiddharth Murpani
112
edited Jan 1 at 16:35
Siddharth Murpani
asked Jan 1 at 13:27
Siddharth MurpaniSiddharth Murpani
112
asked Jan 1 at 13:27
Siddharth MurpaniSiddharth Murpani
112
asked Jan 1 at 13:27
Siddharth MurpaniSiddharth Murpani
112
112
" //all appropriate includes are there", please type them for us and make a Minimal, Complete, and Verifiable example.
– Yunnosch
Jan 1 at 13:36
Please elaborate what keeps you from doing exactly as you described: Use the code which you currently use to make one rectangle inside a loop to do several. You are aware which code that is, aren't you? Can you highlight that part of the code, e.g. with comments "rectangle start" and "rectangle end"?
– Yunnosch
Jan 1 at 16:01
The code you show demonstrates how you successfully create a single rectangle, doesn't it? Could you show your (unsuccessful) attempt to create multiple? Try to make a Minimal, Complete, and Verifiable example of that.
– Yunnosch
Jan 1 at 16:03
add a comment |
" //all appropriate includes are there", please type them for us and make a Minimal, Complete, and Verifiable example.
– Yunnosch
Jan 1 at 13:36
Please elaborate what keeps you from doing exactly as you described: Use the code which you currently use to make one rectangle inside a loop to do several. You are aware which code that is, aren't you? Can you highlight that part of the code, e.g. with comments "rectangle start" and "rectangle end"?
– Yunnosch
Jan 1 at 16:01
The code you show demonstrates how you successfully create a single rectangle, doesn't it? Could you show your (unsuccessful) attempt to create multiple? Try to make a Minimal, Complete, and Verifiable example of that.
– Yunnosch
Jan 1 at 16:03
" //all appropriate includes are there", please type them for us and make a Minimal, Complete, and Verifiable example.
– Yunnosch
Jan 1 at 13:36
" //all appropriate includes are there", please type them for us and make a Minimal, Complete, and Verifiable example.
– Yunnosch
Jan 1 at 13:36
Please elaborate what keeps you from doing exactly as you described: Use the code which you currently use to make one rectangle inside a loop to do several. You are aware which code that is, aren't you? Can you highlight that part of the code, e.g. with comments "rectangle start" and "rectangle end"?
– Yunnosch
Jan 1 at 16:01
Please elaborate what keeps you from doing exactly as you described: Use the code which you currently use to make one rectangle inside a loop to do several. You are aware which code that is, aren't you? Can you highlight that part of the code, e.g. with comments "rectangle start" and "rectangle end"?
– Yunnosch
Jan 1 at 16:01
The code you show demonstrates how you successfully create a single rectangle, doesn't it? Could you show your (unsuccessful) attempt to create multiple? Try to make a Minimal, Complete, and Verifiable example of that.
– Yunnosch
Jan 1 at 16:03
The code you show demonstrates how you successfully create a single rectangle, doesn't it? Could you show your (unsuccessful) attempt to create multiple? Try to make a Minimal, Complete, and Verifiable example of that.
– Yunnosch
Jan 1 at 16:03
add a comment |
1 Answer
1
active
oldest
votes
1
The mistake was the fact that my random number generation formula with CreateRectanglesX() and CreateRectanglesY was wrong. It was
v = rand() / (x_max - x_min) / RAND_MAX + x_min;
Should have been:
v = rand() * (x_max - x_min) / RAND_MAX + x_min;
Only one rectangle was being displayed because the random numbers being produced with the random generation function were too close (due to wrong formula). Fixing the formula resolved the issue!
answered Jan 1 at 16:35
Siddharth MurpaniSiddharth Murpani
112
add a comment |
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1 Answer
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votes
1
The mistake was the fact that my random number generation formula with CreateRectanglesX() and CreateRectanglesY was wrong. It was
v = rand() / (x_max - x_min) / RAND_MAX + x_min;
Should have been:
v = rand() * (x_max - x_min) / RAND_MAX + x_min;
Only one rectangle was being displayed because the random numbers being produced with the random generation function were too close (due to wrong formula). Fixing the formula resolved the issue!
answered Jan 1 at 16:35
Siddharth MurpaniSiddharth Murpani
112
add a comment |
1
The mistake was the fact that my random number generation formula with CreateRectanglesX() and CreateRectanglesY was wrong. It was
v = rand() / (x_max - x_min) / RAND_MAX + x_min;
Should have been:
v = rand() * (x_max - x_min) / RAND_MAX + x_min;
Only one rectangle was being displayed because the random numbers being produced with the random generation function were too close (due to wrong formula). Fixing the formula resolved the issue!
answered Jan 1 at 16:35
Siddharth MurpaniSiddharth Murpani
112
add a comment |
1
1
1
The mistake was the fact that my random number generation formula with CreateRectanglesX() and CreateRectanglesY was wrong. It was
v = rand() / (x_max - x_min) / RAND_MAX + x_min;
Should have been:
v = rand() * (x_max - x_min) / RAND_MAX + x_min;
Only one rectangle was being displayed because the random numbers being produced with the random generation function were too close (due to wrong formula). Fixing the formula resolved the issue!
answered Jan 1 at 16:35
Siddharth MurpaniSiddharth Murpani
112
The mistake was the fact that my random number generation formula with CreateRectanglesX() and CreateRectanglesY was wrong. It was
v = rand() / (x_max - x_min) / RAND_MAX + x_min;
Should have been:
v = rand() * (x_max - x_min) / RAND_MAX + x_min;
Only one rectangle was being displayed because the random numbers being produced with the random generation function were too close (due to wrong formula). Fixing the formula resolved the issue!
answered Jan 1 at 16:35
Siddharth MurpaniSiddharth Murpani
112
edited Jan 1 at 16:47
answered Jan 1 at 16:35
Siddharth MurpaniSiddharth Murpani
112
answered Jan 1 at 16:35
Siddharth MurpaniSiddharth Murpani
112
answered Jan 1 at 16:35
Siddharth MurpaniSiddharth Murpani
112
112
add a comment |
add a comment |
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" //all appropriate includes are there", please type them for us and make a Minimal, Complete, and Verifiable example.
– Yunnosch
Jan 1 at 13:36
Please elaborate what keeps you from doing exactly as you described: Use the code which you currently use to make one rectangle inside a loop to do several. You are aware which code that is, aren't you? Can you highlight that part of the code, e.g. with comments "rectangle start" and "rectangle end"?
– Yunnosch
Jan 1 at 16:01
The code you show demonstrates how you successfully create a single rectangle, doesn't it? Could you show your (unsuccessful) attempt to create multiple? Try to make a Minimal, Complete, and Verifiable example of that.
– Yunnosch
Jan 1 at 16:03