我正在尝试使用 c++/opengl 创建一个 mandelbrot 图像。以下是我到目前为止提出的简单代码和出现的图像：
#include<GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
double dividecubesby = 300;
const double left = -2.0;
const double right = 2.0;
const double bottom = -2.0;
const double top = 2.0;
int maxiteration = 90;
int mandtest(double Cr, double Ci){
double Zr = 0.0;
double Zi = 0.0;
int times = 0;
Zr = Zr+Cr;
Zi = Zi+Ci;
while ((((Zr*Zr)+(Zi*Zi))<4) && (times < maxiteration)){
Zr = (Zr*Zr)-(Zi*Zi);
Zi = 2*Zr*Zi;
Zr = Zr+Cr;
Zi = Zi+Ci;
times = times+1;
}
return times;
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0f,1.0f,1.0f);
double real = left;//this is the real part of the order-pair in the cube
double image = top;// this is the image part of the order-pair in the cube
double deltax = ((right - left)/(dividecubesby));//this means 4/300
double deltay = ((top- bottom)/(dividecubesby));// this means 4/300
glBegin(GL_POINTS);
for(double x= left;x<=right;x += deltax ){
for(double y= bottom; y<=top;y += deltay ){
if((mandtest(x,y))==maxiteration){
glColor3f(1.0f,1.0f,1.0f);
glVertex2f(x,y);
}
else {
glColor3f(0.0f,0.0f,(float)mandtest(x,y)/maxiteration);
glVertex2f(x,y);
}
}
}
glEnd();
glFlush();
}
void init(void)
{
//select clearing (background) color
glClearColor(0.0, 0.0, 0.0, 0.0);
//initialize viewing values
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
//glortho(left,right,bottom,top,near,far)
gluOrtho2D(-2.0, 2.0, -2.0, 2.0);
}
int main(int argc, char ** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(dividecubesby,dividecubesby);
glutCreateWindow("A Simple OpenGL Windows Application with GLUT");
init();
glutDisplayFunc(display);
glutMainLoop();
return 0;
}
