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

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

VECTOR ball_speed;
VECTOR modelRotate;
VECTOR statbilSys;
ENTITY* ball;
VECTOR temp;
VECTOR pos;
var camera_distance[3]= {-100,0,10};
var camera_angle[3];
var cam_dist[3] = {0,200,300}; // xyz distance vector from camera towards the target 
var engineExhaustAnzahlPartikel = 10; //number of particles used for this effect
function vec_randomize (var* vec, var range);
function part_alphafade(PARTICLE *p);
function effect_smokes(PARTICLE *p);
function increase_roll();
function decrease_roll();
BMAP* particle_map;
particle_map = bmap_create("particle.pcx");
preload_mode = 3;


function main()
{
	video_switch (8,32,2);
	
	level_load("roller.wmb"); // load the level
	wait (2); // wait until the level is loaded
	ball = ent_create ("fighter1.mdl", vector(-400, 0, 100), NULL); // create the ball
	
	modelRotate.x = 90;
	modelRotate.y = 180;
	modelRotate.z = -90;
	c_rotate(ball, modelRotate,USE_AXISR);
	wait(1);	// wait 1 frame after creation
	c_updatehull(ball,0);
	ph_setgravity (vector(0, 0, 0)); // set the gravity
	phent_settype (ball, PH_RIGID, PH_BOX); // set the physics entity type
	phent_setmass (ball, 3, PH_BOX); // and its mass
	phent_setfriction (ball, 80); // set the friction
	phent_setdamping (ball, 40, 40); // set the damping
	phent_setelasticity (ball, 2, 20); // set the elasticity
	
	sky_color.red = 0;
	sky_color.green = 0;
	sky_color.blue = 15;
	
	
	while (1)
	{
		ball_speed.x = 0; // move the ball using the cursor keys
		ball_speed.z = -200 * (key_cuu - key_cud); // 25 sets the x / y movement speeds
		modelRotate.y = 5 * (key_cul - key_cur); // no need to move on the vertical axis
		//VECTOR outVel;
		//phent_getangvelocity (ball, outVel);
		modelRotate.x = 0;
		modelRotate.z = 0;
		ball.z = 300;
		ball.tilt = 0;
		//ball.roll = 90;
		//phent_addvelcentral (ball, ball_speed); // add a torque (an angular force) to the ball
		phent_addforcelocal(ball,ball_speed, vector(0,0,0));
		phent_addtorquelocal ( ball, modelRotate );

		my = ball; // The target Entity
		// calculate the camera view's direction angle to the target
		ANGLE cam_ang[3]; // direction angle of the camera to the target.
		vec_diff(temp,nullvector,cam_dist);
		vec_to_angle(cam_ang,temp);
		cam_ang.roll = 0; // roll didn't change vec_to_angle



		// place the camera at the right position to the target
		vec_set(camera.x,cam_dist);
		vec_rotate(camera.x,my.pan);
		vec_add(camera.x,my.x);
		//vec_add(camera.x,shipVel.z);
		// Set the camera angles to the camera view direction 
		vec_set(camera.pan,cam_ang);
		// and rotate it about the target angle 
		ang_add(camera.pan,my.pan);
		//ang_add(camera.pan, add_pan.pan);
		camera.roll = 360;
		
		
		if (key_cuu) {
			
			VECTOR particles_right, particles_dir;
		vec_for_vertex(particles_right, ball, 1753);
			//only one particles_dir needed per ship, same for all engines
			//
			vec_set(particles_dir, vector(-5,2,2));      // length of spray
			// tweak the -10,0,0 to get the look you want, maybe size to thrust % if there is one
			vec_rotate(particles_dir, ball.pan);          // rotate to match ship rotation
			effect(effect_smokes,15,particles_right,particles_dir);

			//increase_roll();
			
			}else{
			//decrease_roll();
		}
		
		wait (1);
	}
}

//// Particle movement handling ///////
function vec_randomize (var* vec, var range)
{
	vec[0] = random(0.5) - 0.25;
	vec[1] = random(0.5) - 0.25;
	vec[2] = random(1) - 0.25;
	vec_normalize(vec,random(range));
}

//// particle alpha handling ////////
function part_alphafade(PARTICLE *p)
{
	p.alpha -= 20*time_step;
	if (p.alpha <= 0) p.lifespan = 0;
}

///// particle creating /////////
function effect_smokes(PARTICLE *p)
{
	p.blue = 46.191;
	p.green = 86.840;
	p.red = 253.129;
	var temp[3]; 
	vec_randomize(temp,3);
	vec_inverse(temp);
	vec_add (p.vel_x, temp);
	p.size = 2.770 ;
	p.alpha = 50 ;
	p.gravity = 0 ;

	p.alpha = 50 + random(15);
	p.bmap = particle_map;
	p.flags |= (MOVE | BRIGHT | BEAM | TRANSLUCENT);

	p.event = part_alphafade; // change to a shorter, faster function
}

function increase_roll() 
{
	while (ball.roll <= (25+90)) {
		ball.roll += 0.01;
	}
}

function decrease_roll() 
{
	while (ball.roll > 95) {
		ball.roll -= 0.01;
	}
}