在Java中显示旋转的多边形可以使用ShapeRenderer类来实现。ShapeRenderer是LibGDX游戏开发框架中的一个工具类,用于绘制2D形状。
要在Java中显示旋转的多边形,可以按照以下步骤进行操作:
import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.math.MathUtils;
public class MyGame extends ApplicationAdapter {
private OrthographicCamera camera;
private ShapeRenderer shapeRenderer;
@Override
public void create() {
camera = new OrthographicCamera();
camera.setToOrtho(false, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
shapeRenderer = new ShapeRenderer();
}
@Override
public void render() {
Gdx.gl.glClearColor(0, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
camera.update();
shapeRenderer.setProjectionMatrix(camera.combined);
shapeRenderer.begin(ShapeRenderer.ShapeType.Line);
shapeRenderer.setColor(1, 1, 1, 1);
float centerX = Gdx.graphics.getWidth() / 2;
float centerY = Gdx.graphics.getHeight() / 2;
float radius = 100;
int sides = 6;
float angle = MathUtils.PI2 / sides;
for (int i = 0; i < sides; i++) {
float x1 = centerX + MathUtils.cos(angle * i) * radius;
float y1 = centerY + MathUtils.sin(angle * i) * radius;
float x2 = centerX + MathUtils.cos(angle * (i + 1)) * radius;
float y2 = centerY + MathUtils.sin(angle * (i + 1)) * radius;
shapeRenderer.line(x1, y1, x2, y2);
}
shapeRenderer.end();
}
@Override
public void dispose() {
shapeRenderer.dispose();
}
}
这样就可以在Java中显示旋转的多边形了。请注意,这只是一个简单的示例,你可以根据自己的需求进行修改和扩展。
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