KSG-Framework/Welt2D.cpp

#include "Welt2D.h"
#include "Bild.h"

using namespace Framework;

Object2D::Object2D()
{
    rSpeed = 0;
    rotation = 0;
    size = 1;
    ref = 1;
}

Object2D::~Object2D()
{}

void Object2D::explosion( Vertex worldPos, float intensity )
{
    intensity /= ( position - worldPos ).getLengthSq();
    speed += ( position - worldPos ) * intensity;
}

void Object2D::impuls( Vertex start, Vertex speed )
{}

void Object2D::setPosition( Vertex pos )
{
    position = pos;
}

void Object2D::setPosition( float x, float y )
{
    position = Vertex( x, y );
}

void Object2D::setDrehung( float drehung )
{
    rotation = drehung;
    while( rotation > PI * 2 )
        rotation -= (float)PI * 2;
    while( rotation < 0 )
        rotation += (float)PI * 2;
}

void Object2D::addDrehung( float drehung )
{
    rotation += drehung;
    while( rotation > PI * 2 )
        rotation -= (float)PI * 2;
    while( rotation < 0 )
        rotation += (float)PI * 2;
}

void Object2D::setSize( float size )
{
    this->size = size;
}

void Object2D::addSize( float size )
{
    this->size += size;
}

bool Object2D::tick( double zeit )
{
    rotation += rSpeed * (float)zeit;
    position += speed * (float)zeit;
    return rSpeed != 0 || speed != Vertex( 0, 0 );
}

Mat3< float > Object2D::getObjectMatrix() const
{
    return Mat3<float>::translation( position ) * Mat3<float>::rotation( rotation ) * Mat3<float>::scaling( size );
}

Mat3< float > Object2D::getInverseObjectMatrix() const
{
    return Mat3<float>::scaling( 1 / size ) * Mat3<float>::rotation( -rotation ) * Mat3<float>::translation( -position );
}

Vertex Object2D::getObjectPos( Vertex worldPos ) const
{
    return ( worldPos - position ).rotation( -rotation ) * ( 1 / size );
}

Vertex Object2D::getObjectDir( Vertex worldDir ) const
{
    return Vertex( worldDir.x, worldDir.y ).rotation( -rotation ) * ( 1 / size );
}

Vertex Object2D::getPosition() const
{
    return position;
}

float Object2D::getDrehung() const
{
    return rotation;
}

float Object2D::getSize() const
{
    return size;
}

bool Object2D::calcHitPoint( Vertex pos, Vertex dir, Vertex &hitpoint ) const
{
    return 0;
}

Object2D *Object2D::getThis()
{
    ref++;
    return this;
}

Object2D *Object2D::release()
{
    if( !--ref )
        delete this;
    return 0;
}


Welt2D::Welt2D()
{
    objects = new RCArray< Object2D >();
    ref = 1;
}

Welt2D::~Welt2D()
{
    objects->release();
}

void Welt2D::addObject( Object2D *obj )
{
    objects->add( obj );
}

void Welt2D::explosion( Vertex worldPos, float intensity, float maxRad )
{
    maxRad = maxRad * maxRad;
    for( auto obj = objects->getArray(); obj.set; obj++ )
    {
        if( ( obj.var->getPosition() - worldPos ).getLengthSq() < maxRad )
            obj.var->explosion( worldPos, intensity );
    }
}

void Welt2D::impuls( Vertex worldPos, Vertex worldDir )
{
    Vertex hitPoint;
    float dist = INFINITY;
    Object2D *o = 0;
    for( auto obj = objects->getArray(); obj.set; obj++ )
    {
        if( obj.var->calcHitPoint( worldPos, worldDir, hitPoint ) )
        {
            if( ( hitPoint - worldPos ).getLengthSq() < dist )
            {
                dist = ( hitPoint - worldPos ).getLengthSq();
                o = obj.var;
            }
        }
    }
    if( o )
        o->impuls( worldPos, worldDir );
}

bool Welt2D::tick( double zeit )
{
    bool ret = 0;
    for( auto obj = objects->getArray(); obj.set; obj++ )
        ret |= obj.var->tick( zeit );
    return ret;
}

void Welt2D::render( Mat3< float > &kamMat, Punkt size, Bild &zRObj )
{
    for( auto obj = objects->getArray(); obj.set; obj++ )
    {
        Rect< float > bnd = obj.var->getBoundingBox();
        Vertex topRight = Vertex( bnd.topLeft.y, bnd.bottomRight.x );
        Vertex bottomLeft = Vertex( bnd.topLeft.x, bnd.bottomRight.y );
        bnd.bottomRight = kamMat * bnd.bottomRight;
        bnd.topLeft = kamMat * bnd.topLeft;
        topRight = kamMat * topRight;
        bottomLeft = kamMat * bottomLeft;
        if( ( bnd.bottomRight.x >= 0 && bnd.bottomRight.x < size.x ) ||
            ( bnd.bottomRight.y >= 0 && bnd.bottomRight.y < size.y ) ||
            ( bnd.topLeft.x >= 0 && bnd.topLeft.x < size.x ) ||
            ( bnd.topLeft.y >= 0 && bnd.topLeft.y < size.y ) ||
            ( topRight.x >= 0 && topRight.x < size.x ) ||
            ( topRight.y >= 0 && topRight.y < size.y ) ||
            ( bottomLeft.x >= 0 && bottomLeft.x < size.x ) ||
            ( bottomLeft.y >= 0 && bottomLeft.y < size.y ) )
            obj.var->render( kamMat, zRObj );
    }
}

Welt2D *Welt2D::getThis()
{
    ref++;
    return this;
}

Welt2D *Welt2D::release()
{
    if( !--ref )
        delete this;
    return 0;
}