Player movement bug?? - lite-C Forums

Player movement bug?? - 07/23/13 21:51

Hi, im making my first person shooter game, zombie like!

I have a lot of fun programming this, and so on, but I have an error on the movement of the player. When he walks (using the terrain.hmp), he stucks and dont glide for a second in the mountains of the ground and then walk, I dont know why, I dont know how to fix this... I set his flags to NARROW | FAT , and so on. Thanks

Posted By: CanadianDavid

Re: Player movement bug?? - 07/24/13 03:16

Likely the player's bounding box is getting stuck in jagged terrain. You should set the bounding box a little higher than the player itself so that it isn't dragging on the floor. You will also have to adjust your code so that the gravity does not always force the character's bounding box to the floor.

Posted By: PadMalcom

Re: Player movement bug?? - 07/24/13 06:16

Hey Gino, show us your player movement code please.

@David: When he sets the bounding box higher, the player code will most likely set it to the ground again so that the player's feet will disappear in the terrain.

Posted By: CanadianDavid

Re: Player movement bug?? - 07/24/13 08:04

@PadMalcom Yes, I'd imagine his player movement code is dragging the bounding box on the floor. A smaller bounding box could be made and instead of simply using a c_trace from my.x, calculate the distance from the player's feet and the ground via:

Code:

VECTOR* my_feet;
c_trace(my.x, vector(my.x,my.y,my.z-5000), IGNORE_ME | IGNORE_PASSABLE);
vec_for_min(my_feet, me);
dist_down = my.z + my_feet.z - target.z;

where dist_down > 0 means we have to apply gravity still.

@Gino See c_move example for a simple movement code. In the comments you'll notice that the bounding box shouldn't be dragging on the floor.

Posted By: Gino_Fabrizio

Re: Player movement bug?? - 07/26/13 13:38

Ok, thanks for your reply. This is the player_action:

Code:

action player_action()
{
	player = me;
	my.health = 100;
	my.eflags |= FAT | NARROW;
	set(my, INVISIBLE);
	player.z = 150;
	camera.arc = 80;
	//vec_set(my.min_x, vector(-20, -20, -40));
	//vec_set(my.max_x, vector(20, 20, 40));
	my.min_z *= 0.5;
	wait(1);
	ent_create(CUBE_MDL, nullvector, flashlight_action); // flashlight
	c_updatehull(my, 1);
	player_movement();
	player_camera();
}

forget the flashlight part

and the movement code:

Code:

function player_movement()
{
	var resistance = 100;
	var key_space_off = 1;
	var jump_wait = 0;
	var rest = 0;
	var step_wait = 0;
	var step_random = 0;
	var step_last = 0;
	var move_speed = 10;
	var fire = 0;
	var reloading = 0;
	set(pan_health_hud, SHOW);
	random_seed(0);
	while(player.health > 0)
	{
		// Gravity
		if (c_trace(my.x, vector(my.x, my.y, my.z - 1000), IGNORE_ME | IGNORE_PASSABLE | IGNORE_PASSENTS | USE_BOX) > 5) absdist.z -= 2 * time_step;
		else absdist.z = 0;		
		
		if (key_shift && resistance > 0) move_speed = 15;
		else move_speed = 10;
		
		dist.x = move_speed * (key_w - key_s) * time_step;
		dist.y = move_speed * (key_a - key_d) * time_step;
		
		if ((key_w || key_s || key_a || key_d || key_space) && key_shift) resistance -= 0.5 * time_step;
		if (resistance <= 0) key_shift = 0;
		
		if ((key_d || key_a || key_w || key_s) && step_wait <= 0) 
		{
			while (step_random == step_last) step_random = integer(random(4)) + 1;
			step_last = step_random;
			if (step_random == 1) snd_play(snd_footstep1, 75, 0);
			else if (step_random == 2) snd_play(snd_footstep2, 75, 0);
			else if (step_random == 3) snd_play(snd_footstep3, 75, 0);
			else if (step_random == 4) snd_play(snd_footstep4, 75, 0);
			if (key_shift && resistance >= 0) step_wait = 15;
			else step_wait = 25;
		}
		if (resistance <= 0)	
		{
			if (rest == 0) snd_play(snd_breath, 80, 0);
			if (rest <= 35)
			{
				rest += 0.35 * time_step;
				if (rest >= 35) 
				{
					resistance = 40;
					rest = 0;
				}
			}
		}
		
		if (key_space && result <= 5 && key_space_off && jump_wait <= 0 && resistance > 0)
		{
			absdist.z = 7.5;
			key_space_off = 0;
			jump_wait = 30;
		}
		else if (!key_space) key_space_off = 1;
		
		if (key_t) player.health -= 5;
		
		if (ent_pistol != NULL)
		{
			if (mouse_left == 1 && fire == 0 && ent_pistol != NULL)
			{
				if (weapon_bullets > 0)
				{
					fire = 1;
					snd_play(snd_fire, 80, 0);
				}	
			}
			if (fire == 1 && my.skill50 < 100)
			{
				ent_animate(ent_pistol, "shoot_a", my.skill50, ANM_CYCLE);
				my.skill50 += 10 * time_step;
			}
			else if (my.skill50 >= 100)
			{
				weapon_bullets -= 1;
				my.skill50 = 0;
				fire = 0;
			}
			if (key_pressed(key_for_str(str_reload_key)) && weapon_bullets < 12 && weapon_loads > 0 && reloading == 0)
			{
				reloading = 1;
				// sonido de recarga
			}
			if (reloading == 1 && my.skill50 < 100)
			{
				ent_animate(ent_pistol, "reload", my.skill50, ANM_CYCLE);
				my.skill50 += 8 * time_step;
			}
			else if (my.skill50 >= 100)
			{
				weapon_bullets = 12;
				weapon_loads -= 1;
				my.skill50 = 0;
				reloading = 0;
			}			
		}			
		
		move_friction = 0;
		c_move(my, dist, absdist, IGNORE_PASSABLE | GLIDE);
		if (ent_pistol != NULL) c_move(ent_pistol, dist, absdist, IGNORE_PASSABLE | GLIDE);
		
		if ((key_shift == 0 || (key_shift == 1 && key_w == 0 && key_a == 0 && key_s == 0 && key_d == 0)) && resistance < 100 && rest == 0) resistance += 0.3 * time_step;
		if (step_wait > 0) step_wait -= 3.5 * time_step;
		if (jump_wait > 0) jump_wait -= 3.5 * time_step;
		wait(1);
	}
	// Death Animation;
	set(my, PASSABLE);
	var tempPos = c_trace(camera.x, vector(camera.x, camera.y, camera.z - 1000), IGNORE_ME | IGNORE_PASSABLE | IGNORE_PASSENTS | USE_BOX);
	tempPos = target.z + 20;
	while(camera.z > tempPos)
	{
		camera.z -= 1.5 * time_step;
		if (camera.tilt > (-80)) camera.tilt -= 1 * time_step;
		wait(1);
	}
	wait(-0.5);
	snd_stopall(4);
	lose_screen();
}

I made my self "resistance" code, when the player run it slow down and then he cant run for a while

its the code, thanks