#include <acknex.h>
#include <default.c>
#define PRAGMA_POINTER

// t = time passed
// b = initial value
// c = change in value
// d = duration in which initial value becomes b+c

var easeInOutQuad(var t, var b,var c,var d) {
	if(t>=d)return b +c;
	t /= d/2;
	if (t < 1) return c/2*t*t + b;
	t--;
	return -c/2 * (t*(t-2) - 1) + b;
}

var easeInOutCubic(var t, var b,var c,var d) {
	if(t>=d)return b +c;
	t /= d/2;
	if (t < 1) return c/2*t*t*t + b;
	t -= 2;
	return c/2*(t*t*t + 2) + b;
}
	

void main(){
	level_load(NULL);
	ENTITY* cube = ent_create(CUBE_MDL,nullvector,NULL);
	camera->y -= 200;
	camera->pan = 90;
	
	
	var initial_value = -100;
	var delta_value = 200; // value will be 100 in the end (-100+200 = 100)
	var time_passed = 0;
	var duration = 2;
	
	while(!key_esc){
		if(key_space){
			cube->x = initial_value;
			time_passed = 0;
		}
		
		if(time_passed<duration)cube->x = easeInOutQuad(time_passed,initial_value,delta_value,duration);
		time_passed += time_step/16;//convert time_step to seconds

		wait(1);	
	}
}