如何放大我的代码(mandelbrot) [英] how to do zoom in my code (mandelbrot)

问题描述

我有以下代码，我想知道如何将zoom插入我的代码中.(我读过一些类似的主题，但我不知道).

i have the following code and i wanted to know how may i insert zoom into my code.(i read some similar subjects but i can't figure).

GLsizei width = 600;
GLsizei height = 600;
int max = 500;
double xpos=0,ypos=0;

double xmax = 2.0;
double xmin = -2.0;
double ymax = 2.0;
double ymin = -2.0;

using namespace std;

void display()
{
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluOrtho2D(-2, width, -2, height);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT );
  mandelbrot();
  glutSwapBuffers();
}


void reshape(GLsizei w, GLsizei h) {

width=w; height=h;
glViewport(0,0,width,height);
glutPostRedisplay();
 }



 void setXYpos(int px, int py)
{  
xpos=xmin+(xmax-xmin)*px/width;
ypos=ymax-(ymax-ymin)*py/height;

 }



    void mandelbrot()
     {
     ...}

   int main(int argc, char *argv[])
 {

glutInit(&argc, argv);
glutInitWindowSize(600, 600);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutCreateWindow("Mandelbrot");
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMainLoop();

return 0;
}

推荐答案

以这种方式缩放还不够；您必须将所选区域的角映射到复杂平面中的点，然后重新生成Mandelbrot映射以获取新坐标.

It's not enough to zoom in this way; you have to map the corners of the selected region to points in the complex plane and re-generate the Mandelbrot mapping for the new coordinates.

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