CODEWITHSUNDEEP
game-physicsphysicsphysics-engine
lone_coder_
lone_coder_

Reputation: 11

Physics engine :calculating delta time

I am building a physics engine in C. How to compute time difference with high precision between frames (deltatime) in C ?(I am not using any graphics api)

Upvotes: 1

Views: 214

Answers (1)

Marian Pekár
Marian Pekár

Reputation: 51

Something like this.

#include <stdio.h>
#include <time.h>

int main()
{
    struct timespec t1, t2; 
    long delta_t = 0;

    while(1)  {
        printf("delta_t = %d nanoseconds\n", delta_t);
        clock_gettime(CLOCK_MONOTONIC, &t1);

        // do something

        clock_gettime(CLOCK_MONOTONIC, &t2);
        delta_t = (t2.tv_nsec - t1.tv_nsec);
    }  

    return 0;
}

The example tested with GCC 8.1.0.

Upvotes: 1

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