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

var key_space_released = 0;
var gravity_acceleration = 5;

// basic camera code
void camera_update(ENTITY* ent) {
	
	VECTOR temp;

	camera.pan = ent.pan;
	camera.tilt = -5;
	
	vec_set(temp,vector(-100,0,4));
	vec_rotate(temp,camera.pan);
	vec_add(temp,ent.x);
	vec_set(camera.x,temp);

}


action act_player() {
	
	player = me;
	c_setminmax(my);
	set(my,SHADOW | UNLIT);
	my.skill4 = 8; // height above ground, should not be equal or below zero - increase min_z (min_z is negative) instead, if necessary
	
	while(1) {

		// horizontal movement

		my.pan += (key_a-key_d)*10*time_step;
		my.skill1 += ((key_w-key_s)*15 - my.skill1)/4*time_step; // makes player accelerate and stop smoothly
		c_move(me,vector(my.skill1*time_step,0,0),nullvector,GLIDE);


		// vertical movement and gravity

		result = c_trace(my.x,vector(my.x,my.y,my.z-200),IGNORE_ME | IGNORE_PASSABLE | USE_BOX);
		result += !trace_hit*200; // when !trace_hit ist true, c_trace returns 0, that's why we have to add some quants (f.i. the maximum trace distance)
		
		if(trace_hit) my.skill3 = target.z; // see 25 lines below
		else my.skill3 = -9999999;

		if(result > my.skill4 || my.skill2 > 0) {
			
			my.skill2 -= gravity_acceleration*time_step;
			my.skill2 = maxv(my.skill2,-80);
			c_move(me,nullvector,vector(0,0,my.skill2*time_step),GLIDE);
			
		}
		else {
			
			my.skill2 = 0;
			if(key_space) {
				
				if(key_space_released) {
					key_space_released = 0;
					my.skill2 = 35;	// jump strength
				}
				
			}
			else key_space_released = 1; // no infinite jumping, release space (while on ground) for a new jump
			
		}
		
		my.z = maxv(my.z,my.skill3+my.skill4-my.min_z); // make sure player's feet stay above ground
		
		camera_update(my);
		
		wait(1);
	}
	
}

void main() {
	
	fps_max = 60;
	video_mode = 10;
	level_load("tip3.wmb");
	ent_create(CUBE_MDL,nullvector,act_player);
	
}