#include <QtGui>#include <cmath>#include "cityblock.h"CityBlock::CityBlock(Kind kind){    this->kind = kind;    int green = 96 + (std::rand() % 64);    int red = 16 + green + (std::rand() % 64);    int blue = 16 + (std::rand() % green);    color = QColor(red, green, blue);    if (kind == Park) {        color = QColor(192 + (std::rand() % 32), 255,                       192 + (std::rand() % 16));        shape.addRect(boundingRect());    } else if (kind == SmallBuilding) {        QRectF block(-7.5, -7.5, 15, 15);        block.moveBottomLeft(QPointF((std::rand() % 6) - 3,                                     (std::rand() % 6) - 3));        shape.addRect(block);    } else if (kind == Hospital) {        int a = (std::rand() % 6) + 10;        int b = (std::rand() % 6) + 10;        QPolygonF block;        block << QPointF(-5, -a) << QPointF(-5, -5) << QPointF(-10, -5)              << QPointF(-10, 5) << QPointF(-5, 5)  << QPointF(-5, 10)              << QPointF(5, 10)  << QPointF(5, 5)   << QPointF(b, 5)              << QPointF(b, -5)  << QPointF(5, -5)  << QPointF(5, -a);        shape.addPolygon(block);    } else if (kind == Hall) {        int padding1 = (std::rand() % 8) + 2;        int padding2 = (std::rand() % 8) + 2;        shape.addEllipse(boundingRect().adjusted(+padding1, +padding1,                                                 -padding2, -padding2));    } else if (kind == Building) {        shape.addRect(boundingRect());    } else if (kind == Tower) {        int padding1 = (std::rand() % 8) + 2;        int padding2 = (std::rand() % 8) + 2;        shape.addRect(boundingRect().adjusted(+padding1, +padding1,                                              -padding2, -padding2));    } else if (kind == LShapedBlock               || kind == LShapedBlockPlusSmallBlock) {        int a = (std::rand() % 6) + 10;        int b = (std::rand() % 6) + 10;        int s = qMin(a, b) / 2;        QPolygonF block;        block << QPointF(-a, -a) << QPointF(-a, +a) << QPointF(-s, +a)              << QPointF(-s, -s) << QPointF(+b, -s) << QPointF(+b, -a);        shape.addPolygon(block);        if (kind == LShapedBlockPlusSmallBlock) {            int inset = (std::rand() % 4) + 4;            shape.addRect(QRectF(-s + inset, -s + inset, a, b));        }    } else if (kind == TwoBlocks) {        int w1 = (std::rand() % 10) + 8;        int h1 = (std::rand() % 28) + 8;        int w2 = (std::rand() % 10) + 8;        int h2 = (std::rand() % 24) + 8;        shape.addRect(QRectF(-16, -16, w1, h1));        shape.addRect(QRectF(-16 + w1 + 4, -16 + (std::rand() % 4),                             w2, h2));    } else if (kind == BlockPlusTwoSmallBlocks) {        int w1 = (std::rand() % 10) + 8;        int h1 = (std::rand() % 28) + 8;        int w2 = (std::rand() % 10) + 8;        int h2 = (std::rand() % 10) + 8;        int w3 = (std::rand() % 6) + 8;        int h3 = (std::rand() % 6) + 8;        int y = (std::rand() % 4) - 16;        shape.addRect(QRectF(-16, -16, w1, h1));        shape.addRect(QRectF(-16 + w1 + 4, y, w2, h2));        shape.addRect(QRectF(-16 + w1 + 4,                             y + h2 + 4 + (std::rand() % 4), w3, h3));    }}QRectF CityBlock::boundingRect() const{    return QRectF(-20, -20, 40, 40);}void CityBlock::paint(QPainter *painter,                      const QStyleOptionGraphicsItem *option,                      QWidget * /* widget */){    if (option->levelOfDetail < 4.0) {        painter->fillPath(shape, color);    } else {        QLinearGradient gradient(QPoint(-20, -20), QPoint(+20, +20));        int coeff = 105 + int(std::log(option->levelOfDetail - 4.0));        gradient.setColorAt(0.0, color.lighter(coeff));        gradient.setColorAt(1.0, color.darker(coeff));        painter->fillPath(shape, gradient);    }}