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52 lines
1.0 KiB
52 lines
1.0 KiB
2 years ago
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#include "enemy.h"
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#include <QTimer>
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Enemy::Enemy(QGraphicsItem *parent) {
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//set graphics
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setPixmap(QPixmap(":/images/enemy.png"));
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//set points
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points << QPointF(200,200) << QPointF(400,200);
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point_index = 0;
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dest = points[0];
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rotateToPoint(dest);
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QTimer * timer = new QTimer();
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connect(timer, SIGNAL(timeout()), this, SLOT(move_forward()));
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timer->start(150);
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}
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void Enemy::rotateToPoint(QPointF p) {
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QLineF ln(pos(), p);
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setRotation((-1 * ln.angle()));
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}
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void Enemy::move_forward() {
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//if close to dest, rotate to next dest
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QLineF ln(pos(), dest);
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if (ln.length() < 5) {
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point_index++;
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if (point_index >= points.size()) {
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return;
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}
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dest = points[point_index];
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rotateToPoint(dest);
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}
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int STEP_SIZE = 5;
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int theta = rotation(); // degrees
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double dy = STEP_SIZE * qSin(qDegreesToRadians(theta));
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double dx = STEP_SIZE * qCos(qDegreesToRadians(theta));
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setPos(x()+dx, y()+dy);
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}
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