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BattleJets.cpp

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/*
CS Senior Project 2003
Team : Leftfield
Project : ModernWarfare
Members :
- Russ Christensen              <rchriste@cs.utah.edu>
- Todd Smith                    <tcsmith@cs.utah.edu>
- Usit Duongsaa                 <duongsaa@cs.utah.edu>
Copyright 2003 Russ Christensen, Usit Duongsaa, and Todd Smith. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 
THIS SOFTWARE IS PROVIDED BY RUSS CHRISTENSEN, USIT DUONGSAA, AND TODD SMITH ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RUSS, USIT, TODD OR OTHER CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "BattleJets.h"
#include "BattleState.h"
#include "Sound.h"
#include "GameState.h"

//------------------------------------------------------------------------------------
BattleJets::BattleJets(int numJets, Vec3D color, char team, int cityID )
{
        m_totalHealth = numJets * BattleUnitData::getObj().armor()[4];
        m_color = color; 
        m_team = team;
        m_cmdType = JetCommands::IDLE;
        m_numMissiles = numJets * 2;
        m_delayTime   = 62 * 5;
        m_targetGroup = -1;
        m_cityID = cityID;
        m_pos = Vec3D(10000.0f,10000.0f,0.0f);
}
//------------------------------------------------------------------------------------
int  BattleJets::getNumJets()
{
        int jetMaxHealth = BattleUnitData::getObj().armor()[4];
        return ( m_totalHealth + jetMaxHealth - 1 ) / jetMaxHealth;
}
//------------------------------------------------------------------------------------
bool BattleJets::isReadyForOrder()
{
        return m_cmdType == JetCommands::IDLE && m_delayTime == 0;
}
//------------------------------------------------------------------------------------
void BattleJets::orderToBomb( int targetGroup )
{
        m_targetGroup = targetGroup;
        m_target = BS->groups[targetGroup].m_pos;
        m_target.z += terrain_getHeight( BS->terrain, m_target.x, m_target.y );
        
        m_cmdType = JetCommands::BOMB;

        if( m_team=='A' ) m_pos = Vec3D( 800.0f, 800.0f, 0.0f );
                                else  m_pos = Vec3D(-800.0f,-800.0f, 0.0f );    
        m_dir.x = clipAngle( 90-D3DXToDegree( atan2f( -m_pos.x, -m_pos.y ) ) ); // face origin
        m_dir.y = 0.0f;
        m_dir.z = 0.0f;
}
//------------------------------------------------------------------------------------
void BattleJets::orderToReturn()
{
        m_cmdType = JetCommands::RETURN;
        if( m_team=='A' ) m_target = Vec3D( 800.0f, 800.0f, 0.0f );
                                else  m_target = Vec3D(-800.0f,-800.0f, 0.0f );
        m_targetGroup = -1;
}
//------------------------------------------------------------------------------------
void BattleJets::orderToGuard( Vec3D target )
{
        m_cmdType = JetCommands::GUARD; 
        m_target = target;

        if( m_team=='A' ) m_pos = Vec3D( 800.0f, 800.0f, 0.0f );
                                else  m_pos = Vec3D(-800.0f,-800.0f, 0.0f );    
        m_dir.x = clipAngle( 90-D3DXToDegree( atan2f( -m_pos.x, -m_pos.y ) ) ); // face origin
        m_dir.y = 0.0f;
        m_dir.z = 0.0f;
}
//------------------------------------------------------------------------------------
void BattleJets::assignNewGuardTarget( Vec3D target )
{
        m_target = target;
}
//------------------------------------------------------------------------------------
void BattleJets::takeHit( BattleBullet &b )
{
        bool isActive = false;                                          // if this battle is active (player's watching it)
        if( GameState::activeBattle() )
                if( GameState::activeBattle()->getBSPtr() == BS ) isActive = true;      
        float vol = Sound::getMasterSFXVol();
        if( !isActive ) vol *= 0.92f;
        Vec3D playerCol( GameState::consolePlayer()->color() );
        if( BS->teamAColor!=playerCol && BS->teamBColor!=playerCol ) vol = 0.0f;

        if( math_distPlanar3D( b.m_pos, m_pos ) < 80.0f )
        {
                int prevNumJets = getNumJets();
                m_totalHealth -= BattleUnitData::getObj().baseDamage()[4];
                int newNumJets = getNumJets();

                for( int i=0; i<prevNumJets-newNumJets; i++ )                           // jets go booomm!!
                {
                        int debrisType = sys_randInt()%2;
                        Vec3D speed = Vec3D( 0.3f*sys_randFloat(), 0.3f*sys_randFloat(), 0.16f*(sys_randFloat()+1.0f) );
                        FLOAT dirSpeed = 3.5f;
                        Vec3D pos( m_pos ), target( m_target );
                        pos.x += 6.0f * (1.0f + sys_randFloat());
                        pos.y += 15.0f * sys_randFloat();
                        pos.z += 30.0f;
                        BS->debris.push_back( BattleDebris(pos,speed,dirSpeed,debrisType) );
                        
                        Sound::play(Sound::SMPL_SFX_EXPLOSION_LARGE,vol);
                }

                if( m_totalHealth < 0 )  m_totalHealth = 0;
        }
}
//------------------------------------------------------------------------------------
void BattleJets::flyTo( Vec3D target )
{
        if( m_targetGroup!= -1 )
        {
                Vec3D targetPos( BS->groups[m_targetGroup].m_pos );
                targetPos.z += terrain_getHeight( BS->terrain, targetPos.x, targetPos.y ) + 5.0f;
                m_target = targetPos;
        }

        Vec3D targetVec = target - m_pos;
        FLOAT targetDir = clipAngle( 90-D3DXToDegree( atan2f( targetVec.x, targetVec.y ) ) );
        if( m_cmdType==JetCommands::GUARD ) targetDir = clipAngle(targetDir+25.0f+10.0f*sys_randFloat() );      // fly around target, not to target

        FLOAT currentDir = m_dir[0];
        FLOAT delta;                            // signed (+CW,-CCW) smallest-magnitude difference in angle
        if( targetDir<0.0f ) targetDir += 360.0f;
        else if( targetDir>=360.0f ) targetDir -= 360.0f;
        if(targetDir>currentDir)
        {
                delta = targetDir - currentDir;
                if(delta>180.0f) delta = delta - 360.0f;
        }
        else
        {
                delta = targetDir - currentDir;
                if(delta<-180.0f) delta = 360.0f - delta;
        }               
        
        const FLOAT turnRate = BattleUnitData::getObj().BGTurnRate()[4];
        FLOAT turnAngle = delta;
        if( delta > turnRate ) turnAngle = turnRate;
        else if( delta < -turnRate ) turnAngle = -turnRate;
        else turnAngle = delta;
        m_dir[0] = clipAngle( currentDir + turnAngle );                         // turn
        
        FLOAT rad = D3DXToRadian( m_dir[0] );
        FLOAT speed = BattleUnitData::getObj().BGFullSpeed()[4];        // move
        m_pos += speed * Vec3D( cosf(rad), sinf(rad), 0.0f );
}
//------------------------------------------------------------------------------------
void BattleJets::fireAntiSurfaceMissiles()
{
        if( m_numMissiles==0 ) return;

        bool isActive = false;                                          // if this battle is active (player's watching it)
        if( GameState::activeBattle() )
                if( GameState::activeBattle()->getBSPtr() == BS ) isActive = true;      
        float vol = Sound::getMasterSFXVol();
        if( !isActive ) vol *= 0.92f;
        Vec3D playerCol( GameState::consolePlayer()->color() );
        if( BS->teamAColor!=playerCol && BS->teamBColor!=playerCol ) vol = 0.0f;

        FLOAT dist = math_distPlanar3D(m_pos,m_target);
        FLOAT targetDir = math_getDir( m_pos, m_target );
        FLOAT deltaAngle = math_deltaDir( targetDir, m_dir.x );
        if( dist<=100.0f && sys_randInt()%3==0 && deltaAngle<15.0f )
        {
                m_numMissiles--;
                Vec3D pos( m_pos ), target( m_target );
                pos.x += 6.0f * (1.0f + sys_randFloat());
                pos.y += 15.0f * sys_randFloat();
                pos.z += 30.0f;
                target.x += 10.0f * sys_randFloat();
                target.y += 10.0f * sys_randFloat();
                BS->addBullet( BattleBullet( BulletTypes::ROCKET, m_team, -1, pos, target ));
                target = m_target;
                target.x += 15.0f * sys_randFloat();
                target.y += 15.0f * sys_randFloat();
                BS->addBullet( BattleBullet( BulletTypes::ROCKET, m_team, -1, pos, target ));

                Sound::play(Sound::SMPL_SFX_FIRE_JET,vol);
        }
}
//------------------------------------------------------------------------------------
void BattleJets::fireAntiAirMissiles()
{
        if( m_numMissiles==0 ) return;

        bool isActive = false;                                          // if this battle is active (player's watching it)
        if( GameState::activeBattle() )
                if( GameState::activeBattle()->getBSPtr() == BS ) isActive = true;      
        float vol = Sound::getMasterSFXVol();
        if( !isActive ) vol *= 0.92f;
        Vec3D playerCol( GameState::consolePlayer()->color() );
        if( BS->teamAColor!=playerCol && BS->teamBColor!=playerCol ) vol = 0.0f;

        for( UINT i=0; i<BS->jets.size(); i++ )
        {
                BattleJets &J = BS->jets[i];
                if( J.m_team == m_team ) continue;                      // look for enemy jets
                if( sys_randInt()%3!=0 ) continue;
                FLOAT dist = math_distPlanar3D(m_pos,J.m_pos);
                if( dist > 100.0f ) continue;                                                           // in firing range
                FLOAT targetDir = math_getDir( m_pos, J.m_pos );
                FLOAT deltaAngle = math_deltaDir( targetDir, m_dir.x );
                if( deltaAngle>35.0f ) continue;                                                        // in firing arc

                m_numMissiles--;
                Vec3D pos( m_pos ), target( J.m_pos );
                pos.x += 6.0f * (1.0f + sys_randFloat());
                pos.y += 15.0f * sys_randFloat();
                pos.z += 30.0f;
                
                target.x += 5.0f * sys_randFloat();
                target.y += 5.0f * sys_randFloat();
                target.z += 30.0f;
                BS->addBullet( BattleBullet( BulletTypes::ANTIAIR, m_team, -1, pos, target ));
                Sound::play(Sound::SMPL_SFX_FIRE_JET,vol);
        }
}
//------------------------------------------------------------------------------------
int BattleJets::getCurrentCommand()
{
        return m_cmdType;
}
//------------------------------------------------------------------------------------
void BattleJets::assignNewBombingTarget( int targetGroup )
{
        m_targetGroup = targetGroup;
}
//------------------------------------------------------------------------------------
void BattleJets::update()
{
        if( m_totalHealth <= 0 ) return;

        if( m_delayTime>0 ) m_delayTime--;

        if( m_cmdType==JetCommands::BOMB || m_cmdType==JetCommands::RETURN || m_cmdType==JetCommands::GUARD )
                flyTo(m_target);

        if( m_cmdType==JetCommands::BOMB )  fireAntiSurfaceMissiles();
        if( m_cmdType==JetCommands::GUARD)  fireAntiAirMissiles();

        if( m_numMissiles==0 && m_cmdType!=JetCommands::RETURN && m_cmdType!=JetCommands::IDLE )
                orderToReturn();


        // mission done : rearm & refuel
        if( m_cmdType==JetCommands::RETURN && math_distPlanar3D(m_pos,m_target) < 100.0f )
        {
                m_cmdType   = JetCommands::IDLE;
                m_delayTime = 62 * 5;
                m_numMissiles = getNumJets() * 2;               
        }
}
//------------------------------------------------------------------------------------
void BattleJets::render()
{
        if( m_totalHealth <= 0 ) return;

        // bombing target cross hair
        const Vec3D crossHairSize(35.0f, 35.0f, 0.05f), dir(0,0,0);
        if( m_cmdType==JetCommands::BOMB )
                mesh_render( artWork->crossHair, m_target, crossHairSize, dir, artWork->colorRed );

        // guarding target cross hair
        if( m_cmdType==JetCommands::GUARD )
                mesh_render( artWork->crossHair, m_target, crossHairSize*1.5f, dir, artWork->colorGreen );

        // jets
        if( m_cmdType != JetCommands::IDLE )
        {
                Vec3D leftPt   = math_translateObjectToWorld( m_pos, m_dir, Vec3D( -4.0f, -3.5f, 0.0f) );
                Vec3D rightPt  = math_translateObjectToWorld( m_pos, m_dir, Vec3D( -4.0f, +3.5f, 0.0f) );
                Vec3D leftVec(  leftPt  - m_pos );
                Vec3D rightVec( rightPt - m_pos );
                
                Vec3D size( BattleUnitData::getObj().jetSize() );
                const FLOAT leftStep[12]  = { 0.0f, 1.0f, 0.0f, 2.0f, 1.0f, 0.0f, 3.0f, 2.0f, 1.0f, 0.0f, 3.0f,-1.0f };
                const FLOAT rightStep[12] = { 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 2.0f, 0.0f, 1.0f, 2.0f, 3.0f,-1.0f, 3.0f };
                int N = getNumJets();
                for( int i=0; i<N; i++ )
                {
                        Vec3D pos(  m_pos + leftStep[i]*leftVec + rightStep[i]*rightVec  );
                        pos.z += 30.0f;
                        mesh_render( artWork->jet_mesh, pos, size, m_dir, artWork->jet_texture, NULL, m_color );
                }
        }
}
//------------------------------------------------------------------------------------
void BattleJets::renderIcon(FLOAT y)
{
        if( m_totalHealth <= 0 ) return;

        overlay_image( artWork->jetsIconTex, Vec2D(0.970f,y+0.035f), Vec2D(0.06f,0.07f) );

        // number of jets       
        overlay_text() << getNumJets();
        overlay_textOut( Vec2D(0.946f, y+0.010f), 0.70f, Colors::black );

        // status text  
        if( m_cmdType==JetCommands::IDLE)
        {
                if( m_delayTime==0 ) overlay_text() << "Ready";
                else
                {
                        int sec = m_delayTime / 62;                                     // time til ready
                        int min = sec / 60;
                        sec = sec % 60;
                        overlay_text() << min << ":";
                        if( sec<10 ) overlay_text() << 0;
                        overlay_text() << sec;
                }                       
        }
        else if( m_cmdType==JetCommands::BOMB)          overlay_text() << "Bombing";    
        else if( m_cmdType==JetCommands::RETURN)        overlay_text() << "Returning";
        else  overlay_text() << "Guarding";

        overlay_textOut( Vec2D(0.948f, y+0.048f), 0.58f, Colors::black );
}
//------------------------------------------------------------------------------------

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