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// Cyphesis Online RPG Server and AI Engine
// Copyright (C) 2005 Alistair Riddoch
//
// 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
// $Id: Motion.h,v 1.13 2008-01-13 01:32:55 alriddoch Exp $
#ifndef RULESETS_MOTION_H
#define RULESETS_MOTION_H
#include "physics/Vector3D.h"
#include <Atlas/Objects/ObjectsFwd.h>
#include <string>
class Entity;
class LocatedEntity;
/// \brief Base class for handling Entity movement
///
/// This class handles any kind of entity movement, handling the necessary
/// physics, collision detection etc. For example, when modelling character
/// movement, in addition to conventional gravity and collision detection
/// it is also necessary to model the fact that the character tracks the
/// surface of the terrain. This means that clients must adjust their
/// predicted position of characters to track the terrain, and must be
/// given the right cues to indicate that this is the right thing to do.
/// Similarly a boyant object needs to track the surface of the water,
/// including any procedural waves on the water.
class Motion {
protected:
Entity & m_entity;
std::string m_mode;
/// Refno of next expected update op
long m_serialno;
/// Collision predicted flag
bool m_collision;
/// Entity with which collision will occur
LocatedEntity * m_collEntity;
/// Collision will cause passing in or out of container
bool m_collLocChange;
/// Normal to the collision surface
Vector3D m_collNormal;
public:
explicit Motion(Entity & body);
virtual ~Motion();
float m_collisionTime;
const std::string & mode() const {
return m_mode;
}
long & serialno() {
return m_serialno;
}
const bool collision() const {
return m_collision;
}
void clearCollision() {
m_collision = false;
}
/// \brief Set the mode the motion is currently in
///
/// Configures motion handler to deal with a certain kind of movement.
/// Typical examples are things like "walk", "run", "stand", "project",
/// "float".
virtual void setMode(const std::string & mode);
/// \brief Constrain current location data.
///
/// Correct the current position and velocity to take account
/// of current constraints. For example, if a character is walking, their
/// their height will be adjusted to match that of the surface they are
/// walking. This is not the same as falling from their true height onto
/// a surface - that is a different movement type. This adjustment
/// is a normal part of the proces of tracking movement.
virtual void adjustPostion();
/// \brief Generate an update operation.
///
/// Generate an Update operation scheduled to occur at an apropriate
/// time for this movement. This is typically when an entity gets
/// a move operation so it know when to schedule the next movement update.
virtual Atlas::Objects::Operation::RootOperation * genUpdateOperation();
/// \brief Generate a Move operation.
///
/// Generate a Move operation scheduled to occur immediatly. This is
/// generally called when an entity gets a Tick operation so it updates
/// its location data, and broadcasts that info
virtual Atlas::Objects::Operation::RootOperation * genMoveOperation();
// Collision bullshit?
float checkCollisions();
// More Collision bullshit
bool resolveCollision();
};
#endif // RULESETS_MOTION_H
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