openGL安装配置+三维点坐标显示+64位电脑调试

http://blog.csdn.net/Jacketinsysu/article/details/49563139（正确）

备注：只需要下载glut文件(包含5个)，不需要安装opengl;不需要在vs和系统环境下配置；只需要加入头文件即可

1.下载（glut）

http://blog.csdn.net/Jacketinsysu/article/details/49563139

解压得到5个文件：glut.h，glut.dll，glut32.dll，glut.lib，glut32.lib。

2.安装

安装glut库。假设你的vs的安装路径为MY_VS_ROOT，那么在MY_VS_ROOT/VC/include/下新建一个文件夹GL，然后复制glut.h到这个文件夹下，比如我的就是D:\soft\vs2015\VC\include\GL\glut.h。 
然后复制glut.lib和glut32.lib到MY_VS_ROOT/VC/lib/下，最后复制glut.dll和glut32.dll到系统的dll目录下：C:\Windows\system32文件夹内（32位系统）或‪C:\Windows\SysWOW64(64位系统）。

3.测试

备注：由于vs新建的GL文件夹，因此在写头文件的时候

#include<GL/glut.h>

#include <glut.h>//出错，头文件地址不对

#include<GL/glut.h>
#pragma comment( linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"" )
void dis(void)
{
    glClear(GL_COLOR_BUFFER_BIT);
    glRectf(-0.5f, -0.5f, 0.5f, 0.5f);
    glFlush();
}

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(400, 400);
    glutCreateWindow("the first openGL");
    glutDisplayFunc(&dis);
    glutMainLoop();
    return 0;
}

4.一堆离散点，画出三维结构，最后拟合曲面

拟合：http://blog.csdn.net/bcbobo21cn/article/details/51073246

http://blog.csdn.net/nick_wang94/article/details/51946702

三维点：http://blog.csdn.net/Carnnation/article/details/44197665

http://blog.csdn.net/zju_fish1996/article/details/51425476

opengl 画兔子： 找原始例子，教程

https://pan.baidu.com/share/home?uk=406211347#category/type=0

5.三维显示------顶点数组

5.1 c++读取txt三维点坐标

#include<fstream>
	ifstream file("result2.txt");
	//	file.open("result2.txt");
	if (!file){
		return 0;
	}
	float x, y, z;
	while (file){
		file >> x >> y >> z;
	}

#include <iostream>  
#include <stdlib.h>  
#include <cv.h>  
#include <cxcore.h>  
#include <highgui.h>  
#include <math.h>  
#include <gl/glut.h>  
#include <fstream>
using namespace std;

float imgdata[500][500];
int w = 0;
int h = 0;
float scalar = 50;//scalar of converting pixel color to float coordinates  

#define pi 3.1415926  
bool mouseisdown = false;
bool loopr = false;
int mx, my;
int ry = 10;
int rx = 10;
int rz = 10;

void timer(int p)
{
	ry -= 5;
	//marks the current window as needing to be redisplayed.  
	glutPostRedisplay();
	if (loopr)
		glutTimerFunc(200, timer, 0);
}


void mouse(int button, int state, int x, int y)
{
	if (button == GLUT_LEFT_BUTTON)
	{
		if (state == GLUT_DOWN)
		{
			mouseisdown = true;
			loopr = false;
		}
		else
		{
			mouseisdown = false;
		}
	}

	if (button == GLUT_RIGHT_BUTTON)
	if (state == GLUT_DOWN)
	{
		loopr = true; glutTimerFunc(200, timer, 0);
	}
}

void motion(int x, int y)
{
	if (mouseisdown == true)
	{
		ry += x - mx;
		rx += y - my;
		mx = x;
		my = y;
		glutPostRedisplay();
	}
}

void special(int key, int x, int y)
{
	switch (key)
	{
	case GLUT_KEY_LEFT:
		ry -= 5;
		glutPostRedisplay();
		break;
	case GLUT_KEY_RIGHT:
		ry += 5;
		glutPostRedisplay();
		break;
	case GLUT_KEY_UP:
		rx += 5;
		glutPostRedisplay();
		break;
	case GLUT_KEY_DOWN:
		rx -= 5;
		glutPostRedisplay();
		break;
	}
}
void renderScene(void) {

	glClear(GL_COLOR_BUFFER_BIT);
	glLoadIdentity();// Reset the coordinate system before modifying  
	gluLookAt(0.0, 0.0, 7.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0);//相机位置，眼睛看物体位置，头顶朝向位置
	//to invert the image  
	glRotatef(ry, 0, 1, 0);
//	glRotatef(rx - 180, 1, 0, 0);
	glRotatef(rx + 90 , 1, 0, 0);
	glRotatef(rz + 90, 0, 0, 1);

	//float imageCenterX = w*.5;
	//float imageCenterY = h*.5;
	float x, y, z;

	glPointSize(1.0);
	glBegin(GL_POINTS);//GL_POINTS  
	ifstream file("result2.txt");
	while (file){
		file >> x >> y >> z;
		x = (x-512)/200;
		y = (y-484)/200;
		z = (255 - z) / 300;
		glColor3f(1,0,0);
		//glVertex3f(0.5, 0.5,0.2); glVertex3f(0.5, 0.8, 0.3); glVertex3f(0.3, 0.5, 4); glVertex3f(0.1, 0.5, 3);
		glVertex3f(x, y, z);//参数的绝对值只能小于1，大于1就没法显示
	}

	//for (int i = 0; i<h; i++){
	//	for (int j = 0; j<w; j++){
	//		// color interpolation  
	//		glColor3f(1 - imgdata[i][j] / 255, imgdata[i][j] / 255, imgdata[i][j] / 255);//red,green,blue  
	//		x = ((float)j - imageCenterX) / scalar;
	//		y = ((float)i - imageCenterY) / scalar;
	//		z = (255 - imgdata[i][j]) / scalar;
	//		glVertex3f(x, y, z);
	//	}
	//}
	glEnd();
	glFlush();
}

void reshape(int w, int h) {
	glViewport(0, 0, (GLsizei)w, (GLsizei)h);//set viewpoint  
	glMatrixMode(GL_PROJECTION);//specify which matrix is the current matrix  
	glLoadIdentity();//replace the current matrix with the identity matrix  
	gluPerspective(60, (GLfloat)w / (GLfloat)h, 1.0, 100.0);
	glMatrixMode(GL_MODELVIEW);
}

void displayDisparity(IplImage* disparity){
	//double xyscale=100;  
	int j = 0;
	int i = 0;
	CvScalar s;

	//accessing the image pixels  
	for (i = 0; i<h; i++){
		for (j = 0; j<w; j++){
			s = cvGet2D(disparity, i, j);//像素点的灰度值
			imgdata[i][j] = s.val[0];//for disparity is a grey image. 
			//其中i代表y轴（第i行），即height；j代表x轴（第j列），即width。
			//cout << imgdata[i][j]<<endl;  
		}
	}
}


int main(int argc, char *argv[])
{
	//cout << "OpenCV and OpenGL works together!" << endl;
	//char* filename = "22.jpg";
	//IplImage* imgGrey = cvLoadImage(filename, 0); //read image as a grey one  

	//ifstream file("result2.txt");
	////	file.open("result2.txt");
	//if (!file){
	//	return 1;
	//}
	//float x, y, z;
	//while (file){
	//	file >> x >> y >> z;
	//}


	//w = imgGrey->width;
	//h = imgGrey->height;

//	displayDisparity(imgGrey);  //二维图像显示
	//cvNamedWindow("original", CV_WINDOW_AUTOSIZE);
	//cvShowImage("original", imgGrey);

	//------------------OpenGL-------------------------  
	glutInit(&argc, argv);//initialize the GLUT library  
	glutInitDisplayMode(GLUT_DEPTH | GLUT_SINGLE | GLUT_RGBA);//sets the initial display mode  
	glutInitWindowPosition(100, 100);
	glutInitWindowSize(500, 500);
//	glutInitWindowSize(1024,968);
	glutCreateWindow("3D disparity image");
	glutDisplayFunc(renderScene);

	glutReshapeFunc(reshape);
	glutMouseFunc(mouse);
	glutMotionFunc(motion);
	glutSpecialFunc(special);
	glutMainLoop();


	cvWaitKey(0);
	//release opencv stuff.  
//	cvReleaseImage(&imgGrey);
	cvDestroyWindow("Original");

	return 0;
}

将一幅图进行三维显示，z深度值是像素值

#include <iostream>  
#include <stdlib.h>  
#include <cv.h>  
#include <cxcore.h>  
#include <highgui.h>  
#include <math.h>  
#include <gl/glut.h>  
using namespace std;

float imgdata[500][500];
int w = 0;
int h = 0;
float scalar = 50;//scalar of converting pixel color to float coordinates  

#define pi 3.1415926  
bool mouseisdown = false;
bool loopr = false;
int mx, my;
int ry = 10;
int rx = 10;

void timer(int p)
{
	ry -= 5;
	//marks the current window as needing to be redisplayed.  
	glutPostRedisplay();
	if (loopr)
		glutTimerFunc(200, timer, 0);
}


void mouse(int button, int state, int x, int y)
{
	if (button == GLUT_LEFT_BUTTON)
	{
		if (state == GLUT_DOWN)
		{
			mouseisdown = true;
			loopr = false;
		}
		else
		{
			mouseisdown = false;
		}
	}

	if (button == GLUT_RIGHT_BUTTON)
	if (state == GLUT_DOWN)
	{
		loopr = true; glutTimerFunc(200, timer, 0);
	}
}

void motion(int x, int y)
{
	if (mouseisdown == true)
	{
		ry += x - mx;
		rx += y - my;
		mx = x;
		my = y;
		glutPostRedisplay();
	}
}

void special(int key, int x, int y)
{
	switch (key)
	{
	case GLUT_KEY_LEFT:
		ry -= 5;
		glutPostRedisplay();
		break;
	case GLUT_KEY_RIGHT:
		ry += 5;
		glutPostRedisplay();
		break;
	case GLUT_KEY_UP:
		rx += 5;
		glutPostRedisplay();
		break;
	case GLUT_KEY_DOWN:
		rx -= 5;
		glutPostRedisplay();
		break;
	}
}
void renderScene(void) {

	glClear(GL_COLOR_BUFFER_BIT);
	glLoadIdentity();// Reset the coordinate system before modifying  
	gluLookAt(0.0, 0.0, 7.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0);
	//to invert the image  
	glRotatef(ry, 0, 1, 0);
	glRotatef(rx - 180, 1, 0, 0);

	float imageCenterX = w*.5;
	float imageCenterY = h*.5;
	float x, y, z;

	glPointSize(1.0);
	glBegin(GL_POINTS);//GL_POINTS  
	for (int i = 0; i<h; i++){
		for (int j = 0; j<w; j++){
			// color interpolation  
			glColor3f(1 - imgdata[i][j] / 255, imgdata[i][j] / 255, imgdata[i][j] / 255);//red,green,blue  
			x = ((float)j - imageCenterX) / scalar;
			y = ((float)i - imageCenterY) / scalar;
			z = (255 - imgdata[i][j]) / scalar;
			glVertex3f(x, y, z);
		}
	}
	glEnd();
	glFlush();
}

void reshape(int w, int h) {
	glViewport(0, 0, (GLsizei)w, (GLsizei)h);//set viewpoint  
	glMatrixMode(GL_PROJECTION);//specify which matrix is the current matrix  
	glLoadIdentity();//replace the current matrix with the identity matrix  
	gluPerspective(60, (GLfloat)w / (GLfloat)h, 1.0, 100.0);
	glMatrixMode(GL_MODELVIEW);
}

void displayDisparity(IplImage* disparity){
	//double xyscale=100;  
	int j = 0;
	int i = 0;
	CvScalar s;

	//accessing the image pixels  
	for (i = 0; i<h; i++){
		for (j = 0; j<w; j++){
			s = cvGet2D(disparity, i, j);
			imgdata[i][j] = s.val[0];//for disparity is a grey image.  
			//cout << imgdata[i][j]<<endl;  
		}
	}
}


int main(int argc, char *argv[])
{
	cout << "OpenCV and OpenGL works together!" << endl;
	char* filename = "22.jpg";
	IplImage* imgGrey = cvLoadImage(filename, 0); //read image as a grey one  
	if (imgGrey == NULL){
		cout << "No valid image input." << endl;
		return 1;
	}
	w = imgGrey->width;
	h = imgGrey->height;

	displayDisparity(imgGrey);
	cvNamedWindow("original", CV_WINDOW_AUTOSIZE);
	cvShowImage("original", imgGrey);

	//------------------OpenGL-------------------------  
	glutInit(&argc, argv);//initialize the GLUT library  
	glutInitDisplayMode(GLUT_DEPTH | GLUT_SINGLE | GLUT_RGBA);//sets the initial display mode  
	glutInitWindowPosition(100, 100);
	glutInitWindowSize(500, 500);
	glutCreateWindow("3D disparity image");
	glutDisplayFunc(renderScene);

	glutReshapeFunc(reshape);
	glutMouseFunc(mouse);
	glutMotionFunc(motion);
	glutSpecialFunc(special);
	glutMainLoop();


	cvWaitKey(0);
	//release opencv stuff.  
	cvReleaseImage(&imgGrey);
	cvDestroyWindow("Original");

	return 0;
}

6. 以上均是在32位系统调试，64位需要参考

http://blog.sina.com.cn/s/blog_ba9d7d990102wd42.html

dll存放的路径：E:\代码\chair3D\x64\Debug