C++绘制全向天线波瓣图
时间: 2023-07-05 16:29:12 浏览: 181
要使用C++绘制全向天线波瓣图,可以使用OpenGL库,通过绘制多个线条组成波瓣图形。以下是一个简单的示例代码,使用OpenGL库绘制全向天线波瓣图:
```cpp
#include <GL/glut.h>
#include <cmath>
int windowWidth = 800;
int windowHeight = 600;
const int antennaX = 400;
const int antennaY = 300;
const int antennaLength = 200;
void drawAntennaPattern() {
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, windowWidth, 0, windowHeight, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glLineWidth(2);
glColor3f(1.0, 1.0, 1.0);
glBegin(GL_LINE_STRIP);
for (int i = 0; i <= 360; i++) {
float radians = i * M_PI / 180.0;
int x = antennaX + antennaLength * cos(radians);
int y = antennaY + antennaLength * sin(radians);
glVertex2f(x, y);
}
glEnd();
for (int i = 0; i < 8; i++) {
glBegin(GL_LINES);
for (int j = 0; j <= 360; j++) {
float radians = j * M_PI / 180.0;
int x1 = antennaX + antennaLength * cos(radians);
int y1 = antennaY + antennaLength * sin(radians);
int x2 = antennaX + antennaLength * cos(radians + i * M_PI / 4);
int y2 = antennaY + antennaLength * sin(radians + i * M_PI / 4);
glVertex2f(x1, y1);
glVertex2f(x2, y2);
}
glEnd();
}
}
void display() {
glClear(GL_COLOR_BUFFER_BIT);
drawAntennaPattern();
glutSwapBuffers();
}
int main(int argc, char *argv[]) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
glutInitWindowPosition(100, 100);
glutInitWindowSize(windowWidth, windowHeight);
glutCreateWindow("Antenna Pattern");
glutDisplayFunc(display);
glutMainLoop();
return 0;
}
```
这个代码与之前绘制全向天线方向图的代码相似,但是在 `drawAntennaPattern` 函数中增加了更多的绘制线条的代码。在这个函数中,先绘制出全向天线的辐射图案,然后以此为基础,绘制出每个波瓣的辐射图案。为了绘制出每个波瓣,我们需要以一定的角度间隔(例如45度)计算出每个波瓣的坐标,并将其与全向天线的坐标连接起来。
这个示例代码中,将全向天线辐射图案和波瓣图案组合在一起,绘制出了一个完整的全向天线波瓣图。
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