批改的C++版Opengl艺术画实现

修改的C++版Opengl艺术画实现

用C++语言改编了一个python版本的艺术画opengl实现，代码与效果如下

感觉用c++绘制速度就是快

#include <math.h>   
#include <GL/glut.h>  
  
int W, H, R;

void init() {
	glClearColor(1, 1, 1, 1);
}

void drawFunc() {
	float r;
	
	glClear(GL_COLOR_BUFFER_BIT);
	glColor3f(0, 0, 0);
	
	glBegin(GL_POINTS);
	for(float x = -R; x <= R; x += 0.04) {
		for(float y = -R; y <= R; y += 0.04) {
			r = cos(x) + sin(y);
            glColor3f( cos(y * r), cos( x * y * r), sin( x * r) );
            glVertex2f(x, y);
		}
	}
	glEnd();
	glFlush();
}
 
 
void reshape(int w, int h) {
    if (h <= 0) h = 1;
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (w <= h)
        gluOrtho2D(-R, R, -R * h / w, R * h / w);
    else
        gluOrtho2D(-R * w / h, R * w / h, -R, R);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}
 
void keyboard(unsigned char key, int x, int y) {
    if (key == 27 || key == 'q')
		exit(0);
}
 
int main(int argc, char **argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
    glutInitWindowPosition(20, 20);
    glutInitWindowSize(W, H);
    glutCreateWindow("Artist Drawer");
    glutReshapeFunc(reshape);
    glutDisplayFunc(drawFunc);
    glutKeyboardFunc(keyboard);
    
	W = H = 500;
	R = 10;
    init();
    glutMainLoop();
}