Add 'fly' and 'fast' privileges and the underlying privileges-to-client system

src/localplayer.cpp

@@ -0,0 +1,638 @@
+/*
+Minetest-c55
+Copyright (C) 2010-2012 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "localplayer.h"
+#include "main.h" // For g_settings
+#include "event.h"
+#include "collision.h"
+#include "gamedef.h"
+#include "nodedef.h"
+#include "settings.h"
+#include "map.h"
+
+/*
+	LocalPlayer
+*/
+
+LocalPlayer::LocalPlayer(IGameDef *gamedef):
+	Player(gamedef),
+	m_sneak_node(32767,32767,32767),
+	m_sneak_node_exists(false)
+{
+	// Initialize hp to 0, so that no hearts will be shown if server
+	// doesn't support health points
+	hp = 0;
+}
+
+LocalPlayer::~LocalPlayer()
+{
+}
+
+void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d,
+		core::list<CollisionInfo> *collision_info)
+{
+	INodeDefManager *nodemgr = m_gamedef->ndef();
+
+	v3f position = getPosition();
+	v3f oldpos = position;
+	v3s16 oldpos_i = floatToInt(oldpos, BS);
+
+	v3f old_speed = m_speed;
+
+	/*std::cout<<"oldpos_i=("<<oldpos_i.X<<","<<oldpos_i.Y<<","
+			<<oldpos_i.Z<<")"<<std::endl;*/
+
+	/*
+		Calculate new position
+	*/
+	position += m_speed * dtime;
+	
+	// Skip collision detection if a special movement mode is used
+	bool fly_allowed = m_gamedef->checkLocalPrivilege("fly");
+	bool free_move = fly_allowed && g_settings->getBool("free_move");
+	if(free_move)
+	{
+		setPosition(position);
+		return;
+	}
+
+	/*
+		Collision detection
+	*/
+	
+	// Player position in nodes
+	v3s16 pos_i = floatToInt(position, BS);
+	
+	/*
+		Check if player is in water (the oscillating value)
+	*/
+	try{
+		// If in water, the threshold of coming out is at higher y
+		if(in_water)
+		{
+			v3s16 pp = floatToInt(position + v3f(0,BS*0.1,0), BS);
+			in_water = nodemgr->get(map.getNode(pp).getContent()).isLiquid();
+		}
+		// If not in water, the threshold of going in is at lower y
+		else
+		{
+			v3s16 pp = floatToInt(position + v3f(0,BS*0.5,0), BS);
+			in_water = nodemgr->get(map.getNode(pp).getContent()).isLiquid();
+		}
+	}
+	catch(InvalidPositionException &e)
+	{
+		in_water = false;
+	}
+
+	/*
+		Check if player is in water (the stable value)
+	*/
+	try{
+		v3s16 pp = floatToInt(position + v3f(0,0,0), BS);
+		in_water_stable = nodemgr->get(map.getNode(pp).getContent()).isLiquid();
+	}
+	catch(InvalidPositionException &e)
+	{
+		in_water_stable = false;
+	}
+
+	/*
+	        Check if player is climbing
+	*/
+
+	try {
+		v3s16 pp = floatToInt(position + v3f(0,0.5*BS,0), BS);
+		v3s16 pp2 = floatToInt(position + v3f(0,-0.2*BS,0), BS);
+		is_climbing = ((nodemgr->get(map.getNode(pp).getContent()).climbable ||
+		nodemgr->get(map.getNode(pp2).getContent()).climbable) && !free_move);
+	}
+	catch(InvalidPositionException &e)
+	{
+		is_climbing = false;
+	}
+
+	/*
+		Collision uncertainty radius
+		Make it a bit larger than the maximum distance of movement
+	*/
+	//f32 d = pos_max_d * 1.1;
+	// A fairly large value in here makes moving smoother
+	f32 d = 0.15*BS;
+
+	// This should always apply, otherwise there are glitches
+	assert(d > pos_max_d);
+
+	float player_radius = BS*0.30;
+	float player_height = BS*1.55;
+	
+	// Maximum distance over border for sneaking
+	f32 sneak_max = BS*0.4;
+
+	/*
+		If sneaking, player has larger collision radius to keep from
+		falling
+	*/
+	/*if(control.sneak)
+		player_radius = sneak_max + d*1.1;*/
+	
+	/*
+		If sneaking, keep in range from the last walked node and don't
+		fall off from it
+	*/
+	if(control.sneak && m_sneak_node_exists)
+	{
+		f32 maxd = 0.5*BS + sneak_max;
+		v3f lwn_f = intToFloat(m_sneak_node, BS);
+		position.X = rangelim(position.X, lwn_f.X-maxd, lwn_f.X+maxd);
+		position.Z = rangelim(position.Z, lwn_f.Z-maxd, lwn_f.Z+maxd);
+		
+		f32 min_y = lwn_f.Y + 0.5*BS;
+		if(position.Y < min_y)
+		{
+			position.Y = min_y;
+
+			//v3f old_speed = m_speed;
+
+			if(m_speed.Y < 0)
+				m_speed.Y = 0;
+
+			/*if(collision_info)
+			{
+				// Report fall collision
+				if(old_speed.Y < m_speed.Y - 0.1)
+				{
+					CollisionInfo info;
+					info.t = COLLISION_FALL;
+					info.speed = m_speed.Y - old_speed.Y;
+					collision_info->push_back(info);
+				}
+			}*/
+		}
+	}
+
+	/*
+		Calculate player collision box (new and old)
+	*/
+	core::aabbox3d<f32> playerbox(
+		position.X - player_radius,
+		position.Y - 0.0,
+		position.Z - player_radius,
+		position.X + player_radius,
+		position.Y + player_height,
+		position.Z + player_radius
+	);
+	core::aabbox3d<f32> playerbox_old(
+		oldpos.X - player_radius,
+		oldpos.Y - 0.0,
+		oldpos.Z - player_radius,
+		oldpos.X + player_radius,
+		oldpos.Y + player_height,
+		oldpos.Z + player_radius
+	);
+
+	/*
+		If the player's feet touch the topside of any node, this is
+		set to true.
+
+		Player is allowed to jump when this is true.
+	*/
+	bool touching_ground_was = touching_ground;
+	touching_ground = false;
+
+	/*std::cout<<"Checking collisions for ("
+			<<oldpos_i.X<<","<<oldpos_i.Y<<","<<oldpos_i.Z
+			<<") -> ("
+			<<pos_i.X<<","<<pos_i.Y<<","<<pos_i.Z
+			<<"):"<<std::endl;*/
+	
+	bool standing_on_unloaded = false;
+	
+	/*
+		Go through every node around the player
+	*/
+	for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++)
+	for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++)
+	for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++)
+	{
+		bool is_unloaded = false;
+		try{
+			// Player collides into walkable nodes
+			if(nodemgr->get(map.getNode(v3s16(x,y,z))).walkable == false)
+				continue;
+		}
+		catch(InvalidPositionException &e)
+		{
+			is_unloaded = true;
+			// Doing nothing here will block the player from
+			// walking over map borders
+		}
+
+		core::aabbox3d<f32> nodebox = getNodeBox(v3s16(x,y,z), BS);
+		
+		/*
+			See if the player is touching ground.
+
+			Player touches ground if player's minimum Y is near node's
+			maximum Y and player's X-Z-area overlaps with the node's
+			X-Z-area.
+
+			Use 0.15*BS so that it is easier to get on a node.
+		*/
+		if(
+				//fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < d
+				fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < 0.15*BS
+				&& nodebox.MaxEdge.X-d > playerbox.MinEdge.X
+				&& nodebox.MinEdge.X+d < playerbox.MaxEdge.X
+				&& nodebox.MaxEdge.Z-d > playerbox.MinEdge.Z
+				&& nodebox.MinEdge.Z+d < playerbox.MaxEdge.Z
+		){
+			touching_ground = true;
+			if(is_unloaded)
+				standing_on_unloaded = true;
+		}
+		
+		// If player doesn't intersect with node, ignore node.
+		if(playerbox.intersectsWithBox(nodebox) == false)
+			continue;
+		
+		/*
+			Go through every axis
+		*/
+		v3f dirs[3] = {
+			v3f(0,0,1), // back-front
+			v3f(0,1,0), // top-bottom
+			v3f(1,0,0), // right-left
+		};
+		for(u16 i=0; i<3; i++)
+		{
+			/*
+				Calculate values along the axis
+			*/
+			f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[i]);
+			f32 nodemin = nodebox.MinEdge.dotProduct(dirs[i]);
+			f32 playermax = playerbox.MaxEdge.dotProduct(dirs[i]);
+			f32 playermin = playerbox.MinEdge.dotProduct(dirs[i]);
+			f32 playermax_old = playerbox_old.MaxEdge.dotProduct(dirs[i]);
+			f32 playermin_old = playerbox_old.MinEdge.dotProduct(dirs[i]);
+			
+			/*
+				Check collision for the axis.
+				Collision happens when player is going through a surface.
+			*/
+			/*f32 neg_d = d;
+			f32 pos_d = d;
+			// Make it easier to get on top of a node
+			if(i == 1)
+				neg_d = 0.15*BS;
+			bool negative_axis_collides =
+				(nodemax > playermin && nodemax <= playermin_old + neg_d
+					&& m_speed.dotProduct(dirs[i]) < 0);
+			bool positive_axis_collides =
+				(nodemin < playermax && nodemin >= playermax_old - pos_d
+					&& m_speed.dotProduct(dirs[i]) > 0);*/
+			bool negative_axis_collides =
+				(nodemax > playermin && nodemax <= playermin_old + d
+					&& m_speed.dotProduct(dirs[i]) < 0);
+			bool positive_axis_collides =
+				(nodemin < playermax && nodemin >= playermax_old - d
+					&& m_speed.dotProduct(dirs[i]) > 0);
+			bool main_axis_collides =
+					negative_axis_collides || positive_axis_collides;
+			
+			/*
+				Check overlap of player and node in other axes
+			*/
+			bool other_axes_overlap = true;
+			for(u16 j=0; j<3; j++)
+			{
+				if(j == i)
+					continue;
+				f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[j]);
+				f32 nodemin = nodebox.MinEdge.dotProduct(dirs[j]);
+				f32 playermax = playerbox.MaxEdge.dotProduct(dirs[j]);
+				f32 playermin = playerbox.MinEdge.dotProduct(dirs[j]);
+				if(!(nodemax - d > playermin && nodemin + d < playermax))
+				{
+					other_axes_overlap = false;
+					break;
+				}
+			}
+			
+			/*
+				If this is a collision, revert the position in the main
+				direction.
+			*/
+			if(other_axes_overlap && main_axis_collides)
+			{
+				//v3f old_speed = m_speed;
+
+				m_speed -= m_speed.dotProduct(dirs[i]) * dirs[i];
+				position -= position.dotProduct(dirs[i]) * dirs[i];
+				position += oldpos.dotProduct(dirs[i]) * dirs[i];
+				
+				/*if(collision_info)
+				{
+					// Report fall collision
+					if(old_speed.Y < m_speed.Y - 0.1)
+					{
+						CollisionInfo info;
+						info.t = COLLISION_FALL;
+						info.speed = m_speed.Y - old_speed.Y;
+						collision_info->push_back(info);
+					}
+				}*/
+			}
+		
+		}
+	} // xyz
+
+	/*
+		Check the nodes under the player to see from which node the
+		player is sneaking from, if any.
+	*/
+	{
+		v3s16 pos_i_bottom = floatToInt(position - v3f(0,BS/2,0), BS);
+		v2f player_p2df(position.X, position.Z);
+		f32 min_distance_f = 100000.0*BS;
+		// If already seeking from some node, compare to it.
+		/*if(m_sneak_node_exists)
+		{
+			v3f sneaknode_pf = intToFloat(m_sneak_node, BS);
+			v2f sneaknode_p2df(sneaknode_pf.X, sneaknode_pf.Z);
+			f32 d_horiz_f = player_p2df.getDistanceFrom(sneaknode_p2df);
+			f32 d_vert_f = fabs(sneaknode_pf.Y + BS*0.5 - position.Y);
+			// Ignore if player is not on the same level (likely dropped)
+			if(d_vert_f < 0.15*BS)
+				min_distance_f = d_horiz_f;
+		}*/
+		v3s16 new_sneak_node = m_sneak_node;
+		for(s16 x=-1; x<=1; x++)
+		for(s16 z=-1; z<=1; z++)
+		{
+			v3s16 p = pos_i_bottom + v3s16(x,0,z);
+			v3f pf = intToFloat(p, BS);
+			v2f node_p2df(pf.X, pf.Z);
+			f32 distance_f = player_p2df.getDistanceFrom(node_p2df);
+			f32 max_axis_distance_f = MYMAX(
+					fabs(player_p2df.X-node_p2df.X),
+					fabs(player_p2df.Y-node_p2df.Y));
+					
+			if(distance_f > min_distance_f ||
+					max_axis_distance_f > 0.5*BS + sneak_max + 0.1*BS)
+				continue;
+
+			try{
+				// The node to be sneaked on has to be walkable
+				if(nodemgr->get(map.getNode(p)).walkable == false)
+					continue;
+				// And the node above it has to be nonwalkable
+				if(nodemgr->get(map.getNode(p+v3s16(0,1,0))).walkable == true)
+					continue;
+			}
+			catch(InvalidPositionException &e)
+			{
+				continue;
+			}
+
+			min_distance_f = distance_f;
+			new_sneak_node = p;
+		}
+		
+		bool sneak_node_found = (min_distance_f < 100000.0*BS*0.9);
+		
+		if(control.sneak && m_sneak_node_exists)
+		{
+			if(sneak_node_found)
+				m_sneak_node = new_sneak_node;
+		}
+		else
+		{
+			m_sneak_node = new_sneak_node;
+			m_sneak_node_exists = sneak_node_found;
+		}
+
+		/*
+			If sneaking, the player's collision box can be in air, so
+			this has to be set explicitly
+		*/
+		if(sneak_node_found && control.sneak)
+			touching_ground = true;
+	}
+	
+	/*
+		Set new position
+	*/
+	setPosition(position);
+	
+	/*
+		Report collisions
+	*/
+	if(collision_info)
+	{
+		// Report fall collision
+		if(old_speed.Y < m_speed.Y - 0.1 && !standing_on_unloaded)
+		{
+			CollisionInfo info;
+			info.t = COLLISION_FALL;
+			info.speed = m_speed.Y - old_speed.Y;
+			collision_info->push_back(info);
+		}
+	}
+
+	if(!touching_ground_was && touching_ground){
+		MtEvent *e = new SimpleTriggerEvent("PlayerRegainGround");
+		m_gamedef->event()->put(e);
+	}
+
+	{
+		camera_barely_in_ceiling = false;
+		v3s16 camera_np = floatToInt(getEyePosition(), BS);
+		MapNode n = map.getNodeNoEx(camera_np);
+		if(n.getContent() != CONTENT_IGNORE){
+			if(nodemgr->get(n).walkable){
+				camera_barely_in_ceiling = true;
+			}
+		}
+	}
+}
+
+void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d)
+{
+	move(dtime, map, pos_max_d, NULL);
+}
+
+void LocalPlayer::applyControl(float dtime)
+{
+	// Clear stuff
+	swimming_up = false;
+
+	// Random constants
+	f32 walk_acceleration = 4.0 * BS;
+	f32 walkspeed_max = 4.0 * BS;
+	
+	setPitch(control.pitch);
+	setYaw(control.yaw);
+	
+	v3f move_direction = v3f(0,0,1);
+	move_direction.rotateXZBy(getYaw());
+	
+	v3f speed = v3f(0,0,0);
+	
+	bool fly_allowed = m_gamedef->checkLocalPrivilege("fly");
+	bool fast_allowed = m_gamedef->checkLocalPrivilege("fly");
+
+	bool free_move = fly_allowed && g_settings->getBool("free_move");
+	bool fast_move = fast_allowed && g_settings->getBool("fast_move");
+	bool continuous_forward = g_settings->getBool("continuous_forward");
+
+	if(free_move || is_climbing)
+	{
+		v3f speed = getSpeed();
+		speed.Y = 0;
+		setSpeed(speed);
+	}
+
+	// Whether superspeed mode is used or not
+	bool superspeed = false;
+	
+	// If free movement and fast movement, always move fast
+	if(free_move && fast_move)
+		superspeed = true;
+	
+	// Auxiliary button 1 (E)
+	if(control.aux1)
+	{
+		if(free_move)
+		{
+			// In free movement mode, aux1 descends
+			v3f speed = getSpeed();
+			if(fast_move)
+				speed.Y = -20*BS;
+			else
+				speed.Y = -walkspeed_max;
+			setSpeed(speed);
+		}
+		else if(is_climbing)
+		{
+		        v3f speed = getSpeed();
+			speed.Y = -3*BS;
+			setSpeed(speed);
+		}
+		else
+		{
+			// If not free movement but fast is allowed, aux1 is
+			// "Turbo button"
+			if(fast_move)
+				superspeed = true;
+		}
+	}
+
+	if(continuous_forward)
+		speed += move_direction;
+
+	if(control.up)
+	{
+		if(continuous_forward)
+			superspeed = true;
+		else
+			speed += move_direction;
+	}
+	if(control.down)
+	{
+		speed -= move_direction;
+	}
+	if(control.left)
+	{
+		speed += move_direction.crossProduct(v3f(0,1,0));
+	}
+	if(control.right)
+	{
+		speed += move_direction.crossProduct(v3f(0,-1,0));
+	}
+	if(control.jump)
+	{
+		if(free_move)
+		{
+			v3f speed = getSpeed();
+			if(fast_move)
+				speed.Y = 20*BS;
+			else
+				speed.Y = walkspeed_max;
+			setSpeed(speed);
+		}
+		else if(touching_ground)
+		{
+			/*
+				NOTE: The d value in move() affects jump height by
+				raising the height at which the jump speed is kept
+				at its starting value
+			*/
+			v3f speed = getSpeed();
+			if(speed.Y >= -0.5*BS)
+			{
+				speed.Y = 6.5*BS;
+				setSpeed(speed);
+				
+				MtEvent *e = new SimpleTriggerEvent("PlayerJump");
+				m_gamedef->event()->put(e);
+			}
+		}
+		// Use the oscillating value for getting out of water
+		// (so that the player doesn't fly on the surface)
+		else if(in_water)
+		{
+			v3f speed = getSpeed();
+			speed.Y = 1.5*BS;
+			setSpeed(speed);
+			swimming_up = true;
+		}
+		else if(is_climbing)
+		{
+	                v3f speed = getSpeed();
+			speed.Y = 3*BS;
+			setSpeed(speed);
+		}
+	}
+
+	// The speed of the player (Y is ignored)
+	if(superspeed)
+		speed = speed.normalize() * walkspeed_max * 5.0;
+	else if(control.sneak)
+		speed = speed.normalize() * walkspeed_max / 3.0;
+	else
+		speed = speed.normalize() * walkspeed_max;
+	
+	f32 inc = walk_acceleration * BS * dtime;
+	
+	// Faster acceleration if fast and free movement
+	if(free_move && fast_move)
+		inc = walk_acceleration * BS * dtime * 10;
+	
+	// Accelerate to target speed with maximum increment
+	accelerate(speed, inc);
+}
+
+v3s16 LocalPlayer::getStandingNodePos()
+{
+	if(m_sneak_node_exists)
+		return m_sneak_node;
+	return floatToInt(getPosition(), BS);
+}
+