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Added first and early version of an item-collecting AI (within

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SkiddingAI).


git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@11517 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
hikerstk 2012-08-23 22:00:36 +00:00
parent fe65f46035
commit a1c51d61a5
11 changed files with 579 additions and 66 deletions
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27
data/stk_config.xml
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@ -200,6 +200,22 @@
post-skid-rotate-factor="1" jump-time="0.4"
reduce-turn-min="0.2" reduce-turn-max="0.8"/>
<!-- Kart-specific settings used by the AI.
max-item-angle: Items that would need more than this change in
direction are not considered for collection.
time-full-steer is the time for the AI to go from neutral steering to
extreme left (or right). This can be used to reduce
'shaking' of AI karts caused by changing steering direction
too often. It also helps with making it easier to push the
AI karts (otherwise micro-corrections make this nearly
impossible). A value of 1/maxFPS / 2 will guarantee that
the wheel can go from -1 to +1 steering in one frame,
basically disabling this mechanism.
-->
<ai max-item-angle="0.7" max-item-angle-high-speed="0.3"
time-full-steer="0.1"
/>
<!-- Slipstream: length: How far behind a kart slipstream works
collect-time: How many seconds of sstream give maximum benefit
use-time: How long the benefit will last.
@ -235,17 +251,10 @@
than 23 can only be reached with powerups).
time-full-steer is the time when a player's input goes from neutral
steering to extreme left or right.
time-full-steer-ai is the time for the AI to go from neutral steering to
extreme left (or right). This can be used to reduce
'shaking' of AI karts caused by changing steering direction
too often. It also helps with making it easier to push the
AI karts (otherwise micro-corrections make this nearly
impossible). A value of 1/maxFPS / 2 will guarantee that
the wheel can go from -1 to +1 steering in one frame,
basically disabling this mechanism. -->
-->
<turn turn-speed= "0 10 25 45"
turn-radius="2.0 7.5 15 25"
time-full-steer ="0.2" time-full-steer-ai="0.1" />
time-full-steer ="0.2" />
<!-- Speed and acceleration related values: power and max-speed (in m/s)
have 3 values, one for low, medium, and hard.

8
src/ide/vc9/supertuxkart.vcproj
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@ -907,6 +907,10 @@
RelativePath="..\..\karts\controller\ai_base_controller.cpp"
>
</File>
<File
RelativePath="..\..\karts\controller\ai_properties.cpp"
>
</File>
<File
RelativePath="..\..\karts\controller\controller.cpp"
>
@ -2105,6 +2109,10 @@
RelativePath="..\..\karts\controller\ai_base_controller.hpp"
>
</File>
<File
RelativePath="..\..\karts\controller\ai_properties.hpp"
>
</File>
<File
RelativePath="..\..\karts\controller\controller.hpp"
>

4
src/karts/controller/ai_base_controller.cpp
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@ -24,6 +24,7 @@
#include "karts/abstract_kart.hpp"
#include "karts/kart_properties.hpp"
#include "karts/skidding_properties.hpp"
#include "karts/controller/ai_properties.hpp"
#include "modes/linear_world.hpp"
#include "tracks/track.hpp"
#include "utils/constants.hpp"
@ -37,6 +38,7 @@ AIBaseController::AIBaseController(AbstractKart *kart,
m_kart = kart;
m_kart_length = m_kart->getKartLength();
m_kart_width = m_kart->getKartWidth();
m_ai_properties = m_kart->getKartProperties()->getAIProperties();
if(race_manager->getMinorMode()!=RaceManager::MINOR_MODE_3_STRIKES)
{
@ -415,7 +417,7 @@ void AIBaseController::setSteering(float angle, float dt)
}
// The AI has its own 'time full steer' value (which is the time
float max_steer_change = dt/m_kart->getKartProperties()->getTimeFullSteerAI();
float max_steer_change = dt/m_ai_properties->m_time_full_steer;
if(old_steer < steer_fraction)
{
m_controls->m_steer = (old_steer+max_steer_change > steer_fraction)

71
src/karts/controller/ai_properties.cpp Normal file
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@ -0,0 +1,71 @@
//
// SuperTuxKart - a fun racing game with go-kart
// Copyright (C) 2012 Joerg Henrichs
//
// 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 3
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "karts/controller/ai_properties.hpp"
#include "io/xml_node.hpp"
float AIProperties::UNDEFINED = -99.9f;
/** Constructor. Sets all properties to the special UNDEFINED value.
*/
AIProperties::AIProperties()
{
m_max_item_angle = UNDEFINED;
m_max_item_angle_high_speed = UNDEFINED;
m_time_full_steer = UNDEFINED;
} // AIProperties
// ----------------------------------------------------------------------------
/** Loads the AI properties from an XML file.
* \param ai_node The XML node containing all AI properties.
*/
void AIProperties::load(const XMLNode *ai_node)
{
ai_node->get("max-item-angle", &m_max_item_angle );
ai_node->get("max-item-angle-high-speed", &m_max_item_angle_high_speed);
ai_node->get("time-full-steer", &m_time_full_steer );
} // load
// ----------------------------------------------------------------------------
/** Check if all AI properties are defined, and aborts if some are missing.
* \param filename Name of the file from which the properties are read.
* Only used for error messages.
*/
void AIProperties::checkAllSet(const std::string &filename) const
{
#define CHECK_NEG( a,str_a) if(a<=UNDEFINED) { \
fprintf(stderr,"Missing default value for '%s' in '%s'.\n", \
str_a,filename.c_str());exit(-1); \
}
CHECK_NEG(m_max_item_angle, "max-item-angle" );
CHECK_NEG(m_max_item_angle_high_speed, "max-item-angle-high-speed");
CHECK_NEG(m_time_full_steer, "time-full-steer" );
} // checkAllSet
// ----------------------------------------------------------------------------
void AIProperties::copyFrom(const AIProperties *destination)
{
*this = *destination;
} // copyFrom
// ----------------------------------------------------------------------------
/* EOF */

72
src/karts/controller/ai_properties.hpp Normal file
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@ -0,0 +1,72 @@
//
// SuperTuxKart - a fun racing game with go-kart
// Copyright (C) 2012 Joerg Henrichs
//
// 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 3
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#ifndef HEADER_AI_PROPERTIES_HPP
#define HEADER_AI_PROPERTIES_HPP
#include <string>
class XMLNode;
/** A simple class that stores all AI related properties. It acts as
* interface between kart_properties and AI (to avoid either passing
* very many individual variables, or making KartProperties a dependency
* of the AI). The AIs are friends of this class and so have access to
* its protected members.
* \ingroup karts
*/
class AIProperties
{
public:
//LEAK_CHECK();
protected:
// Give them access to the members
friend class AIBaseController;
friend class SkiddingAI;
/** Used to check that all values are defined in the xml file. */
static float UNDEFINED;
/** Maximum direction change when trying to collect an item. Items that
* are more than this away, will not even be considered. */
float m_max_item_angle;
/** Maximum direction change when trying to collect an item while being on
* high-speed (i.e. skidding bonus, nitro, ...). Items that
* are more than this away, will not even be considered. */
float m_max_item_angle_high_speed;
/** Time for AI karts to reach full steer angle (used to reduce shaking
* of karts). */
float m_time_full_steer;
public:
AIProperties();
void load(const XMLNode *skid_node);
void copyFrom(const AIProperties *destination);
void checkAllSet(const std::string &filename) const;
}; // AIProperties
#endif
/* EOF */

368
src/karts/controller/skidding_ai.cpp
View File

@ -57,12 +57,14 @@
#include "graphics/slip_stream.hpp"
#include "karts/abstract_kart.hpp"
#include "karts/controller/kart_control.hpp"
#include "karts/controller/ai_properties.hpp"
#include "karts/kart_properties.hpp"
#include "karts/max_speed.hpp"
#include "karts/rescue_animation.hpp"
#include "karts/skidding.hpp"
#include "karts/skidding_properties.hpp"
#include "items/attachment.hpp"
#include "items/item_manager.hpp"
#include "items/powerup.hpp"
#include "modes/linear_world.hpp"
#include "network/network_manager.hpp"
@ -82,12 +84,13 @@ SkiddingAI::SkiddingAI(AbstractKart *kart)
m_wait_for_players = true;
m_make_use_of_slipstream = false;
m_max_handicap_speed = 0.9f;
m_item_tactic = IT_TEN_SECONDS;
m_false_start_probability = 0.08f;
m_min_start_delay = 0.3f;
m_max_start_delay = 0.5f;
m_min_steps = 1;
m_item_tactic = IT_TEN_SECONDS;
m_nitro_level = NITRO_NONE;
m_item_behaviour = ITEM_COLLECT_NONE;
m_handle_bomb = false;
setSkiddingFraction(4.0f);
break;
@ -95,12 +98,13 @@ SkiddingAI::SkiddingAI(AbstractKart *kart)
m_wait_for_players = true;
m_make_use_of_slipstream = false;
m_max_handicap_speed = 0.95f;
m_item_tactic = IT_CALCULATE;
m_false_start_probability = 0.04f;
m_min_start_delay = 0.25f;
m_max_start_delay = 0.4f;
m_min_steps = 1;
m_item_tactic = IT_CALCULATE;
m_nitro_level = NITRO_SOME;
m_item_behaviour = ITEM_COLLECT_NONE;
m_handle_bomb = true;
setSkiddingFraction(3.0f);
break;
@ -117,13 +121,15 @@ SkiddingAI::SkiddingAI(AbstractKart *kart)
m_max_start_delay = 0.28f;
m_min_steps = 2;
m_nitro_level = NITRO_ALL;
m_item_behaviour = ITEM_COLLECT_PRIORITY;
m_handle_bomb = true;
setSkiddingFraction(2.0f);
break;
}
#ifdef AI_DEBUG
m_debug_sphere = irr_driver->getSceneManager()->addSphereSceneNode(1);
m_debug_sphere = irr_driver->getSceneManager()->addSphereSceneNode(1.0f);
m_item_sphere = irr_driver->getSceneManager()->addSphereSceneNode(1.0f);
#define CURVE_PREDICT1 0
#define CURVE_KART 1
#define CURVE_LEFT 2
@ -152,6 +158,7 @@ SkiddingAI::SkiddingAI(AbstractKart *kart)
irr::video::SColor(128, 0, 128, 0));
#endif
setControllerName("Skidding");
} // SkiddingAI
//-----------------------------------------------------------------------------
@ -162,6 +169,7 @@ SkiddingAI::~SkiddingAI()
{
#ifdef AI_DEBUG
irr_driver->removeNode(m_debug_sphere);
irr_driver->removeNode(m_item_sphere);
for(unsigned int i=0; i<NUM_CURVES; i++)
{
delete m_curve[i];
@ -184,6 +192,7 @@ void SkiddingAI::reset()
m_current_curve_radius = 0.0f;
m_curve_center = Vec3(0,0,0);
m_current_track_direction = GraphNode::DIR_STRAIGHT;
m_item_to_collect = NULL;
AIBaseController::reset();
m_track_node = QuadGraph::UNKNOWN_SECTOR;
@ -398,6 +407,14 @@ void SkiddingAI::handleBraking()
} // handleBraking
//-----------------------------------------------------------------------------
/** Decides in which direction to steer. If the kart is off track, it will
* steer towards the center of the track. Otherwise it will call
* findNonCrashingPoint to determine a point to aim for. Then it will
* evaluate items to see if it should aim for any items or try to avoid
* item, and potentially adjust the aim-at point, before computing the
* steer direction to arrive at the currently aim-at point.
* \param dt Time step size.
*/
void SkiddingAI::handleSteering(float dt)
{
const int next = m_next_node_index[m_track_node];
@ -463,23 +480,301 @@ void SkiddingAI::handleSteering(float dt)
else
{
m_start_kart_crash_direction = 0;
Vec3 straight_point;
Vec3 aim_point;
int last_node = QuadGraph::UNKNOWN_SECTOR;
#undef NEW_ALGORITHM
#ifdef NEW_ALGORITHM
findNonCrashingPoint2(&straight_point);
findNonCrashingPoint2(&aim_point, &last_node);
#else
findNonCrashingPoint(&straight_point);
findNonCrashingPoint(&aim_point, &last_node);
#endif
#ifdef AI_DEBUG
m_debug_sphere->setPosition(aim_point.toIrrVector());
#endif
#ifdef AI_DEBUG
m_debug_sphere->setPosition(straight_point.toIrrVector());
#endif
steer_angle = steerToPoint(straight_point);
// Potentially adjust the point to aim for in order to either
// aim to collect item, or steer to avoid a bad item.
if(m_item_behaviour!=ITEM_COLLECT_NONE)
handleItemCollectionAndAvoidance(&aim_point, last_node);
steer_angle = steerToPoint(aim_point);
} // if m_current_track_direction!=LEFT/RIGHT
setSteering(steer_angle, dt);
} // handleSteering
//-----------------------------------------------------------------------------
/** Decides if the currently selected aim at point (as determined by
* handleSteering) should be changed in order to collect/avoid an item.
* \param aim_point Currently selected point to aim at. If the AI should
* try to collect an item, this value will be changed.
* \param last_node Index of the graph node on which the aim_point is.
*/
void SkiddingAI::handleItemCollectionAndAvoidance(Vec3 *aim_point,
int last_node)
{
// Angle of line from kart to aim_point
float kart_aim_angle = atan2(aim_point->getX()-m_kart->getXYZ().getX(),
aim_point->getZ()-m_kart->getXYZ().getZ());
// The AI does a much better job of collecting items if after selecting
// an item it tries to collect this item even if it doesn't fulfill the
// original conditions to be selected in the first place anymore.
// Example: An item was selected to be collected because the AI was
// hitting it anyway. Then the aim_point changes, and the selected item
// is not that close anymore. In many cases it is better to keep on
// aiming for the items (otherwise the aiming will not have much benefit
// and mostly only results in collecting items that are on long straights)
if(m_item_to_collect)
{
if(handleSelectedItem(kart_aim_angle, aim_point, last_node))
{
// Still aim at the previsouly selected item.
*aim_point = m_item_to_collect->getXYZ();
return;
}
if(m_ai_debug)
printf("[AI] %s unselects item.\n", m_kart->getIdent().c_str());
// Otherwise remove the pre-selected item (and start
// looking for a new item).
m_item_to_collect = NULL;
} // m_item_to_collect
// Make sure we have a valid last_node
if(last_node==QuadGraph::UNKNOWN_SECTOR)
last_node = m_next_node_index[m_track_node];
int node = m_track_node;
float distance = 0;
const Item *item_to_collect = NULL;
const Item *item_to_avoid = NULL;
const float max_item_lookahead_distance = 30.f;
while(distance < max_item_lookahead_distance)
{
int q_index= QuadGraph::get()->getNode(node).getQuadIndex();
const std::vector<Item *> &items_ahead =
ItemManager::get()->getItemsInQuads(q_index);
for(unsigned int i=0; i<items_ahead.size(); i++)
{
evaluateItems(items_ahead[i], kart_aim_angle,
&item_to_avoid, &item_to_collect);
} // for i<items_ahead;
distance += QuadGraph::get()->getDistanceToNext(node,
m_successor_index[node]);
node = m_next_node_index[node];
// Stop when we have reached the last quad
if(node==last_node) break;
} // while (distance < max_item_lookahead_distance)
core::line2df line_to_target(m_kart->getXYZ().getX(),
m_kart->getXYZ().getZ(),
aim_point->getX(), aim_point->getZ());
if(item_to_collect)
{
#ifdef AI_DEBUG
m_item_sphere->setVisible(false);
#endif
core::vector2df collect(item_to_collect->getXYZ().getX(),
item_to_collect->getXYZ().getZ());
core::vector2df cp = line_to_target.getClosestPoint(collect);
Vec3 xyz(cp.X, item_to_collect->getXYZ().getY(), cp.Y);
if(item_to_collect->hitKart(NULL, xyz))
{
#ifdef AI_DEBUG
m_item_sphere->setVisible(true);
m_item_sphere->setPosition(item_to_collect->getXYZ().toIrrVector());
#endif
if(m_ai_debug)
printf("[AI] %s selects item type '%d'.\n",
m_kart->getIdent().c_str(),
item_to_collect->getType());
m_item_to_collect = item_to_collect;
}
else // kart will not hit item
{
Vec3 xyz = item_to_collect->getXYZ();
float item_angle = atan2(xyz.getX() - m_kart->getXYZ().getX(),
xyz.getZ() - m_kart->getXYZ().getZ() );
float angle = normalizeAngle(kart_aim_angle - item_angle);
float d = (m_kart->getXYZ()-item_to_collect->getXYZ()).length();
if(fabsf(angle) < 0.3)
{
*aim_point = item_to_collect->getXYZ();
#ifdef AI_DEBUG
m_item_sphere->setVisible(true);
m_item_sphere->setPosition(item_to_collect->getXYZ().toIrrVector());
#endif
if(m_ai_debug)
printf("[AI] %s adjusts to hit type %d angle %f.\n",
m_kart->getIdent().c_str(),
item_to_collect->getType(), angle);
}
else
{
if(m_ai_debug)
printf("[AI] %s won't hit '%d', angle %f.\n",
m_kart->getIdent().c_str(),
item_to_collect->getType(), angle);
}
} // kart will not hit item
} // if item to consider was found
} // handleItemCollectionAndAvoidance
//-----------------------------------------------------------------------------
/** This function is called when the AI is trying to hit an item that was
* previously selected to be collected. The AI only evaluates f it's still
* feasible/useful to try to collect this item, or abandon it (and then
* look for a new item).
* \pre m_item_to_collect is defined
* \return True if th AI should still aim for the pre-selected item.
*/
bool SkiddingAI::handleSelectedItem(float kart_aim_angle,
Vec3 *aim_point, int last_node)
{
// If the item is unavailable or has been switched into a bad item
// stop aiming for it.
if(m_item_to_collect->getDisableTime()>0 ||
m_item_to_collect->getType() == Item::ITEM_BANANA ||
m_item_to_collect->getType() == Item::ITEM_BANANA )
return false;
const Vec3 &xyz = m_item_to_collect->getXYZ();
float item_angle = atan2(xyz.getX() - m_kart->getXYZ().getX(),
xyz.getZ() - m_kart->getXYZ().getZ());
float angle = normalizeAngle(kart_aim_angle - item_angle);
if(fabsf(angle)>1.5)
{
// We (likely) have passed the item we were aiming for
return false;
}
else
{
// FIXME: use ?? float d = (m_kart->getXYZ() - m_item_to_collect->getXYZ()).length();
// printf("angle %f distance %f a/d %f\n",
// angle, d, angle/d);
// angle/d < 0.5 or so?
// Keep on aiming for last selected item
#ifdef AI_DEBUG
m_item_sphere->setVisible(true);
m_item_sphere->setPosition(m_item_to_collect->getXYZ().toIrrVector());
#endif
*aim_point = m_item_to_collect->getXYZ();
}
return true;
} // handleSelectedItem
//-----------------------------------------------------------------------------
/** This subroutine decides if the specified item should be collected,
* avoided, or ignored (i.e. not interesting). It can use the state of the
* kart, e.g. depending on what item is available atm, how much nitro it has,
* etc. Though atm it picks the first good item, and tries to avoid.
* \param item The item which is considered for picking/avoidance.
* \param kart_aim_angle The angle of the line from the kart to the aim point.
* If aim_angle==kart_heading then the kart is driving towards the
* item.
* \param item_to_avoid A pointer to a previously selected item to avoid
* (NULL if no item was avoided so far).
* \param item_to_collect A pointer to a previously selected item to collect.
*/
void SkiddingAI::evaluateItems(const Item *item, float kart_aim_angle,
const Item **item_to_avoid,
const Item **item_to_collect)
{
// Ignore items that are currently disabled
if(item->getDisableTime()>0) return;
// If the item type is not handled here, ignore it
Item::ItemType type = item->getType();
if( type!=Item::ITEM_BANANA && type!=Item::ITEM_BONUS_BOX &&
type!=Item::ITEM_NITRO_BIG && type!=Item::ITEM_NITRO_SMALL )
return;
bool avoid = false;
switch(type)
{
// Negative items: avoid them
case Item::ITEM_BUBBLEGUM: // fallthrough
case Item::ITEM_BANANA: avoid = true; break;
// Positive items: try to collect
case Item::ITEM_NITRO_BIG:
// Only collect nitro, if it can actually be stored.
if(m_kart->getEnergy() +
m_kart->getKartProperties()->getNitroBigContainer()
> m_kart->getKartProperties()->getNitroMax())
return;
// fall through: if we have enough space to store a big
// container, we can also store a small container, and
// finally fall through to the bonus box code.
case Item::ITEM_NITRO_SMALL: avoid = false; break;
// Only collect nitro, if it can actually be stored.
if (m_kart->getEnergy() +
m_kart->getKartProperties()->getNitroSmallContainer()
> m_kart->getKartProperties()->getNitroMax())
return;
case Item::ITEM_BONUS_BOX:
break;
case Item::ITEM_TRIGGER: return; break;
} // switch
// item_angle The angle of the item (relative to the forward axis,
// so 0 means straight ahead in world coordinates!).
const Vec3 &xyz = item->getXYZ();
float item_angle = atan2(xyz.getX() - m_kart->getXYZ().getX(),
xyz.getZ() - m_kart->getXYZ().getZ());
float diff = normalizeAngle(kart_aim_angle-item_angle);
// The kart is driving at high speed, when the current max speed
// is higher than the max speed of the kart (which is caused by
// any powerups etc)
// Otherwise check for skidding. If the kart is still collecting
// skid bonus, currentMaxSpeed is not affected yet, but it might
// be if the kart would need to turn sharper, therefore stops
// skidding, and will get the bonus speed.
bool high_speed = (m_kart->getCurrentMaxSpeed() >
m_kart->getKartProperties()->getMaxSpeed() ) ||
m_kart->getSkidding()->getSkidBonusReady();
float max_angle = high_speed
? m_ai_properties->m_max_item_angle_high_speed
: m_ai_properties->m_max_item_angle;
if(fabsf(diff) > max_angle)
return;
float steer_direction = normalizeAngle(m_kart->getHeading()
- kart_aim_angle );
float item_direction = normalizeAngle(m_kart->getHeading()
- item_angle );
// If we have to steer to the left, and the item is to the right
// or vice versa, ignore the item.
if(steer_direction * item_direction < 0)
return;
if(avoid)
{
if(!(*item_to_avoid))
*item_to_avoid = item;
}
else
{
if(!(*item_to_collect))
*item_to_collect = item;
}
} // evaluateItems
//-----------------------------------------------------------------------------
/** Handle all items depending on the chosen strategy: Either (low level AI)
* just use an item after 10 seconds, or do a much better job on higher level
@ -996,14 +1291,16 @@ void SkiddingAI::checkCrashes(const Vec3& pos )
* a left turn, the kart will aim to the left point (and vice versa for
* right turn) - slightly offset by the width of the kart to avoid that
* the kart is getting off track.
* \return result The new point the kart should aim at when steering.
* \param aim_position The point to aim for, i.e. the point that can be
* driven to in a straight line.
* \param last_node The graph node index in which the aim_position is.
*/
void SkiddingAI::findNonCrashingPoint2(Vec3 *result)
void SkiddingAI::findNonCrashingPoint2(Vec3 *result, int *last_node)
{
unsigned int sector = m_next_node_index[m_track_node];
*last_node = m_next_node_index[m_track_node];
const core::vector2df xz = m_kart->getXYZ().toIrrVector2d();
const Quad &q = QuadGraph::get()->getQuadOfNode(sector);
const Quad &q = QuadGraph::get()->getQuadOfNode(*last_node);
// Index of the left and right end of a quad.
const unsigned int LEFT_END_POINT = 0;
@ -1031,7 +1328,7 @@ void SkiddingAI::findNonCrashingPoint2(Vec3 *result)
#endif
while(1)
{
unsigned int next_sector = m_next_node_index[sector];
unsigned int next_sector = m_next_node_index[*last_node];
const Quad &q_next = QuadGraph::get()->getQuadOfNode(next_sector);
// Test if the next left point is to the right of the left
// line. If so, a new left line is defined.
@ -1067,20 +1364,20 @@ void SkiddingAI::findNonCrashingPoint2(Vec3 *result)
#endif
right.end = p;
}
sector = next_sector;
*last_node = next_sector;
} // while
// Now look for the next curve to find out to which side of the
// track the AI should aim at
sector = m_track_node;
*last_node = m_track_node;
int count = 0;
while(1)
{
GraphNode::DirectionType dir;
unsigned int last;
unsigned int succ = m_successor_index[sector];
const GraphNode &gn = QuadGraph::get()->getNode(sector);
unsigned int succ = m_successor_index[*last_node];
const GraphNode &gn = QuadGraph::get()->getNode(*last_node);
gn.getDirectionData(succ, &dir, &last);
if(dir==GraphNode::DIR_LEFT)
{
@ -1106,7 +1403,7 @@ void SkiddingAI::findNonCrashingPoint2(Vec3 *result)
// We are going straight. Determine point to aim for based on the
// direction of the track after the straight section
sector = m_next_node_index[last];
*last_node = m_next_node_index[last];
count++;
if(count>1)
printf("That shouldn't happen %d!!!\n", count);
@ -1115,7 +1412,7 @@ void SkiddingAI::findNonCrashingPoint2(Vec3 *result)
Vec3 ppp(0.5f*(left.end.X+right.end.X),
m_kart->getXYZ().getY(),
0.5f*(left.end.Y+right.end.Y));
*result = QuadGraph::get()->getQuadOfNode(sector).getCenter();
*result = QuadGraph::get()->getQuadOfNode(*last_node).getCenter();
*result = ppp;
} // findNonCrashingPoint2
@ -1124,8 +1421,11 @@ void SkiddingAI::findNonCrashingPoint2(Vec3 *result)
* driven to without crashing with the track, then find towards which of
* the two edges of the track is closest to the next curve after wards,
* and return the position of that edge.
* \param aim_position The point to aim for, i.e. the point that can be
* driven to in a straight line.
* \param last_node The graph node index in which the aim_position is.
*/
void SkiddingAI::findNonCrashingPoint(Vec3 *result)
void SkiddingAI::findNonCrashingPoint(Vec3 *aim_position, int *last_node)
{
#ifdef AI_DEBUG_KART_HEADING
const Vec3 eps(0,0.5f,0);
@ -1134,7 +1434,7 @@ void SkiddingAI::findNonCrashingPoint(Vec3 *result)
Vec3 forw(0, 0, 50);
m_curve[CURVE_KART]->addPoint(m_kart->getTrans()(forw)+eps);
#endif
unsigned int sector = m_next_node_index[m_track_node];
*last_node = m_next_node_index[m_track_node];
int target_sector;
Vec3 direction;
@ -1145,9 +1445,9 @@ void SkiddingAI::findNonCrashingPoint(Vec3 *result)
// of iterations in the while loop is less than 7.
for(unsigned int i=0; i<100; i++)
{
//target_sector is the sector at the longest distance that we can drive
//to without crashing with the track.
target_sector = m_next_node_index[sector];
// target_sector is the sector at the longest distance that we can
// drive to without crashing with the track.
target_sector = m_next_node_index[*last_node];
//direction is a vector from our kart to the sectors we are testing
direction = QuadGraph::get()->getQuadOfNode(target_sector).getCenter()
@ -1174,21 +1474,22 @@ void SkiddingAI::findNonCrashingPoint(Vec3 *result)
step_coord = m_kart->getXYZ()+direction*m_kart_length * float(i);
QuadGraph::get()->spatialToTrack(&step_track_coord, step_coord,
sector );
*last_node );
float distance = fabsf(step_track_coord[0]);
//If we are outside, the previous sector is what we are looking for
//If we are outside, the previous node is what we are looking for
if ( distance + m_kart_width * 0.5f
> QuadGraph::get()->getNode(sector).getPathWidth() )
> QuadGraph::get()->getNode(*last_node).getPathWidth() )
{
*result = QuadGraph::get()->getQuadOfNode(sector).getCenter();
*aim_position = QuadGraph::get()->getQuadOfNode(*last_node)
.getCenter();
return;
}
}
sector = target_sector;
*last_node = target_sector;
} // for i<100
*result = QuadGraph::get()->getQuadOfNode(sector).getCenter();
*aim_position = QuadGraph::get()->getQuadOfNode(*last_node).getCenter();
} // findNonCrashingPoint
//-----------------------------------------------------------------------------
@ -1438,7 +1739,6 @@ bool SkiddingAI::doSkid(float steer_fraction)
void SkiddingAI::setSteering(float angle, float dt)
{
float steer_fraction = angle / m_kart->getMaxSteerAngle();
m_controls->m_skid = doSkid(steer_fraction);
// Adjust steer fraction in case to be in [-1,1]
@ -1493,7 +1793,7 @@ void SkiddingAI::setSteering(float angle, float dt)
float old_steer = m_controls->m_steer;
// The AI has its own 'time full steer' value (which is the time
float max_steer_change = dt/m_kart->getKartProperties()->getTimeFullSteerAI();
float max_steer_change = dt/m_ai_properties->m_time_full_steer;
if(old_steer < steer_fraction)
{
m_controls->m_steer = (old_steer+max_steer_change > steer_fraction)

28
src/karts/controller/skidding_ai.hpp
View File

@ -45,6 +45,12 @@ class SkiddingAI : public AIBaseController
private:
/** How the AI uses nitro. */
enum {NITRO_NONE, NITRO_SOME, NITRO_ALL} m_nitro_level;
/** Determines if the AI should prefer collecting items over avoiding
* items, or avoiding over collecting. */
enum {ITEM_COLLECT_NONE, ITEM_COLLECT_PRIORITY, ITEM_AVOID_PRIORITY}
m_item_behaviour;
enum ItemTactic
{
IT_TEN_SECONDS, //Fire after 10 seconds have passed, since the item
@ -135,11 +141,20 @@ private:
#ifdef DEBUG
/** For skidding debugging: shows the estimated turn shape. */
ShowCurve **m_curve;
#endif
/** If set an item that the AI should aim for. */
const Item *m_item_to_collect;
/** For debugging purpose: a sphere indicating where the AI
* is targeting at. */
irr::scene::ISceneNode *m_debug_sphere;
/** For item debugging: set to the item that is selected to
* be collected. */
irr::scene::ISceneNode *m_item_sphere;
#endif
/*Functions called directly from update(). They all represent an action
*that can be done, and end up setting their respective m_controls
*variable, except handle_race_start() that isn't associated with any
@ -153,10 +168,17 @@ private:
void handleBraking();
void handleNitroAndZipper();
void computeNearestKarts();
void handleItemCollectionAndAvoidance(Vec3 *aim_point,
int last_node);
bool handleSelectedItem(float kart_aim_angle, Vec3 *aim_point,
int last_node);
void evaluateItems(const Item *item, float kart_aim_angle,
const Item **item_to_avoid,
const Item **item_to_collect);
void checkCrashes(const Vec3& pos);
void findNonCrashingPoint(Vec3 *result);
void findNonCrashingPoint2(Vec3 *result);
void findNonCrashingPoint(Vec3 *result, int *last_node);
void findNonCrashingPoint2(Vec3 *result, int *last_node);
void determineTrackDirection();
void determineTurnRadius(const Vec3 &start,

16
src/karts/kart_properties.cpp
View File

@ -27,6 +27,7 @@
#include "graphics/irr_driver.hpp"
#include "graphics/material_manager.hpp"
#include "io/file_manager.hpp"
#include "karts/controller/ai_properties.hpp"
#include "karts/kart_model.hpp"
#include "karts/skidding_properties.hpp"
#include "modes/world.hpp"
@ -108,11 +109,13 @@ KartProperties::KartProperties(const std::string &filename)
if (filename != "")
{
m_skidding_properties = NULL;
m_ai_properties = NULL;
load(filename, "kart");
}
else
{
m_skidding_properties = new SkiddingProperties();
m_ai_properties = new AIProperties();
}
} // KartProperties
@ -123,6 +126,8 @@ KartProperties::~KartProperties()
delete m_kart_model;
if(m_skidding_properties)
delete m_skidding_properties;
if(m_ai_properties)
delete m_ai_properties;
} // ~KartProperties
//-----------------------------------------------------------------------------
@ -140,7 +145,10 @@ void KartProperties::copyFrom(const KartProperties *source)
// So all pointer variables need to be separately allocated and assigned.
m_skidding_properties = new SkiddingProperties();
assert(m_skidding_properties);
m_ai_properties = new AIProperties();
assert(m_ai_properties);
*m_skidding_properties = *source->m_skidding_properties;
*m_ai_properties = *source->m_ai_properties;
} // copyFrom
//-----------------------------------------------------------------------------
@ -318,6 +326,11 @@ void KartProperties::getAllData(const XMLNode * root)
m_skidding_properties->load(skid_node);
}
if(const XMLNode *ai_node = root->getNode("ai"))
{
m_ai_properties->load(ai_node);
}
if(const XMLNode *slipstream_node = root->getNode("slipstream"))
{
slipstream_node->get("length", &m_slipstream_length );
@ -334,7 +347,6 @@ void KartProperties::getAllData(const XMLNode * root)
if(const XMLNode *turn_node = root->getNode("turn"))
{
turn_node->get("time-full-steer", &m_time_full_steer );
turn_node->get("time-full-steer-ai", &m_time_full_steer_ai );
turn_node->get("turn-speed", &m_turn_speed );
turn_node->get("turn-radius", &m_turn_radius_at_speed);
// For now store the turn radius in turn angle, the correct
@ -593,7 +605,6 @@ void KartProperties::checkAllSet(const std::string &filename)
CHECK_NEG(m_mass, "mass" );
CHECK_NEG(m_time_full_steer, "turn time-full-steer" );
CHECK_NEG(m_time_full_steer_ai, "turn time-full-steer-ai" );
CHECK_NEG(m_wheel_damping_relaxation, "wheels damping-relaxation" );
CHECK_NEG(m_wheel_damping_compression, "wheels damping-compression" );
CHECK_NEG(m_wheel_radius, "wheels radius" );
@ -671,6 +682,7 @@ void KartProperties::checkAllSet(const std::string &filename)
CHECK_NEG(m_explosion_radius, "explosion radius" );
m_skidding_properties->checkAllSet(filename);
m_ai_properties->checkAllSet(filename);
} // checkAllSet
// ----------------------------------------------------------------------------

17
src/karts/kart_properties.hpp
View File

@ -36,6 +36,7 @@ using namespace irr;
#include "race/race_manager.hpp"
#include "utils/vec3.hpp"
class AIProperties;
class Material;
class SkiddingProperties;
class XMLNode;
@ -61,6 +62,11 @@ private:
* any skidding property. */
SkiddingProperties *m_skidding_properties;
/** AI Properties for this kart, as a separate object in order to
* reduce dependencies (and therefore compile time) when changing
* any AI property. */
AIProperties *m_ai_properties;
/** The absolute path of the icon texture to use. */
Material *m_icon_material;
@ -118,9 +124,6 @@ private:
* braking force. */
float m_time_full_steer; /**< Time for player karts to reach full
* steer angle. */
float m_time_full_steer_ai; /**< Time for AI karts to reach full
* steer angle (used to reduce shaking
* of karts). */
/** Stores the speeds at which the turn angle changes. */
std::vector<float> m_turn_speed;
@ -397,11 +400,6 @@ public:
* steering straight. */
float getTimeFullSteer () const {return m_time_full_steer; }
/** Returns how long the AI should need to steer in a direction. This
* avoids that the AI has an advantage by being able to change steering
* to quickly (e.g. counteracting pushes). */
float getTimeFullSteerAI () const {return m_time_full_steer_ai; }
/** Get braking information. */
float getBrakeFactor () const {return m_brake_factor; }
@ -620,6 +618,9 @@ public:
const SkiddingProperties *getSkiddingProperties() const
{ return m_skidding_properties; }
/** Returns a pointer to the AI properties. */
const AIProperties *getAIProperties() const { return m_ai_properties; }
/** Returns ratio of current speed to max speed at which the gear will
* change (for our simualated gears = simple change of engine power). */
const std::vector<float>&

8
src/karts/skidding.cpp
View File

@ -67,6 +67,7 @@ void Skidding::reset()
m_skid_factor = 1.0f;
m_real_steering = 0.0f;
m_visual_rotation = 0.0f;
m_skid_bonus_ready = false;
} // reset
// ----------------------------------------------------------------------------
@ -166,6 +167,7 @@ float Skidding::getSteeringWhenSkidding(float steering) const
void Skidding::update(float dt, bool is_on_ground,
float steering, bool skidding)
{
m_skid_bonus_ready = false;
if (is_on_ground)
{
if((fabs(steering) > 0.001f) && skidding)
@ -306,7 +308,11 @@ void Skidding::update(float dt, bool is_on_ground,
unsigned int level = getSkidBonus(&bonus_time, &bonus_speed,
&bonus_force);
// If at least level 1 bonus is reached, show appropriate gfx
if(level>0) m_kart->getKartGFX()->setSkidLevel(level);
if(level>0)
{
m_skid_bonus_ready = true;
m_kart->getKartGFX()->setSkidLevel(level);
}
// If player stops skidding, trigger bonus, and change state to
// SKID_SHOW_GFX_*
if(!skidding)

10
src/karts/skidding.hpp
View File

@ -57,6 +57,10 @@ private:
* trigger the skidding bonus. */
float m_skid_time;
/** True if the kart has skidded long enough to get a skid bonus if it
* stopped skidding now. */
bool m_skid_bonus_ready;
public:
/** SKID_OLD: old skidding, will be removed. */
/** SKID_NONE: Kart is currently not skidding.
@ -114,6 +118,12 @@ protected:
SkidState getSkidState() const { return m_skid_state; }
// ------------------------------------------------------------------------
float getSteeringWhenSkidding(float steering) const;
// ------------------------------------------------------------------------
/** Returns if the kart has skidded long enough to get a skid bonus if it
* stopped skidding now. This function returns false if the kart is
* actually using the skid bonus. */
bool getSkidBonusReady() const { return m_skid_bonus_ready; }
}; // Skidding