physics.h

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#ifndef __H__SYSTEMS_PHYSICS__
#define __H__SYSTEMS_PHYSICS__
 
#include "require.h"
 
static void system_integrate_velocity(system_req_t payload,
                                      allocator_t temporary_allocator) {
  entity_iter_t it = system_req_entity_iter(&payload);
  while (entity_iter_next(&it)) {
    ASSERT__(it.entity->kind == ENTITY_KIND_CONSTRUCT);
    // TODO: overflow the position correctly
    vec2 *v = &it.entity->as_construct.velocity;
    *v = vec2_add(*v, vec2_scale(*v, payload.delta_time));
    printf("%f %f\n", v->x, v->y);
  }
}
 
#endif