How to write rose code in c language

Steps to write rose code in C language: 1. Specify the size and title of the window in the main function, as well as the callback function for drawing; 2. Define the drawing algorithm in the callback function, and use it in the algorithm The cubic function simultaneously calculates the drawn point coordinates based on polar coordinates; 3. By depicting the drawn point coordinates, a beautiful rose is presented.

Rose is a flower full of romance and beauty and is widely used in literature, poetry, music and art. In the field of computer science, writing rosettes in C has become an interesting and challenging task. You can use a graphics library to draw a rose. By controlling the number and position of drawn straight lines, you can draw beautiful roses. This article will introduce how to write an exquisite rose in C language.

Implementation principle:

To draw roses in C language, you need to use an image drawing library, such as OpenGL graphics library. Using OpenGL, you can draw directly on the computer screen Draw geometric shapes and images. And embed some algorithms in the program to draw the shape of the rose. These algorithms are usually equations about polar coordinates that control the size and shape of the drawn rose. To realize the drawing of roses, you need to draw some lines and curves and fill colors into specific areas. This can usually be achieved using the OpenGL line drawing and filling functions.

The following is a sample code for drawing roses in C language:

#include <GL/glut.h>
#include <math.h>
void displayCallback()
{
    GLint n = 1000, k;
    GLfloat r = 0.2, x, y, theta;
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glColor3f(0.98, 0.625, 0.12);
    glBegin(GL_POLYGON);
    for (k = 0; k < n; ++k)
    {
        theta = 2 * 3.141592654 * k / n;
        x = r * (sin(theta) * (sin(7 * theta) + 1.2 * sin(3 * theta)));
        y = r * (cos(theta) * (sin(7 * theta) + 1.2 * sin(3 * theta)));
        glVertex2f(x, y);
    }
    glEnd();
    glFlush();
}
int main(int argc, char** argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA | GLUT_DEPTH);
    glutInitWindowSize(400, 400);
    glutCreateWindow("Rose");
    glutDisplayFunc(displayCallback);
    glutMainLoop();
    return 0;
}

The function of this code is to use OpenGL graphic library to draw rose images. First, specify the size and title of the window in the main function, as well as the callback function for drawing. Then define the drawing algorithm in the callback function. In the algorithm, a cubic function is used and the drawn point coordinates are calculated based on polar coordinates. Finally, by describing the drawn point coordinates, a beautiful rose is presented.

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