///////////////////////////////////////////////////////////////
#include <acknex.h>
#include <default.c>

///////////////////////////////////////////////////////////////

VECTOR ball_speed;
ENTITY* ball;

function main()
{
	fps_max = 140;
	level_load("roller.wmb"); // load the level
	wait (2); // wait until the level is loaded
 	ball = ent_create ("ball.mdl", vector(-400, 0, 100), NULL); // create the ball
	ph_setgravity (vector(0, 0, -386)); // set the gravity
	phent_settype (ball, PH_RIGID, PH_SPHERE); // set the physics entity type
	phent_setmass (ball, 3, PH_SPHERE); // and its mass
	phent_setfriction (ball, 80); // set the friction
	phent_setdamping (ball, 40, 40); // set the damping
	phent_setelasticity (ball, 5, 20); // set the elasticity
	while (1)
	{
		ball_speed.x += 1;
		ball_speed.y += 1 * (key_cuu - key_cud); // 25 sets the x / y movement speeds
		ball_speed.z = 0; // no need to move on the vertical axis
		phent_addtorqueglobal (ball, ball_speed); // add a torque (an angular force) to the ball
		camera.x = ball.x - 300; // keep the camera 300 quants behind the ball
		camera.y = ball.y; // using the same y with the ball
		camera.z = 1000; // and place it at z = 1000 quants
		camera.tilt = -60; // make it look downwards
		wait (1);
	}
}

 my.skill1 += (key_w-key_s) * 0.02 * (1 + 2 * key_r);
 my.skill2 += (key_a-key_d) * 0.02;


//Then modify it with something like below.
//Key_f is used here as a braking mechanism.
//Acelleration is dependant on key press time :)


while(key_f < 0){wait(1);}
		if(key_f ==1)
		{
			my.skill1 -=0.1*time_step;
			if(my.skill1 <= 0)
			{
				my.skill1 = 0;
			}
			
		}
		while(key_f < 0){wait(1);}
		if(key_f ==1)
		{
			my.skill2 -=0.1*time_step;
			if(my.skill2 <= 0)
			{
				my.skill2 = 0;
			}
			
		}
		while(key_f < 0){wait(1);}
		if(key_f ==1)
		{
			my.skill3 -=0.1*time_step;
			if(my.skill3 <= 0)
			{
				my.skill3 = 0;
			}
			
		}
		if(my.skill1 > 3)
		{
			my.skill1 = 3;
		}
		if(my.skill2 > 3)
		{
			my.skill2 = 3;
		}
		if(my.skill3 > 3)
		{
			my.skill3 = 3;
		}

//OR like this in Vadim647's example

//	if (vec_length(my.skill1)>3) vec_normalize(my.skill1,2);//speed
	//	vec_normalize(my.skill1,vec_length(my.skill1) * 1.35);
	//	my.skill1 += (key_w-key_s) * 0.2;