可以移动的恐龙--用键盘让恐龙具有生命 dino.dat文件绘制恐龙 a d w s移动恐龙 源代码

#include<windows.h>

#include<math.h>

#include <gl/Glut.h>

#include <fstream>

#include <iostream>

#include<vector>

using namespace std;

void myDisplay(void);

void myInit(void);

void readFromFile(char *fileName);

void myKeyboard(unsigned char key,int x , int y);

struct GLPoint{

GLint x, y;

};

bool moved = true; //为了一开始能够显示

GLint xDirection = 0;

GLint yDirection = 0;

static GLint numPolys = 0; //总共线条的个数

//static GLint numLines = 0;

vector <GLPoint> pt ; //用来存放各个顶点的值

vector <GLint> numPoints; //每条线包含的顶点个数

const GLint screenWidth = 640;

const GLint screenHeight = 480;

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

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);

glutInitWindowSize(screenWidth,screenHeight);

glutInitWindowPosition(100,150);

glutCreateWindow("Dinosaur");

glutDisplayFunc(myDisplay);

glutKeyboardFunc(myKeyboard);

myInit();

glutMainLoop();

return 0;

}

void readFromFile(char *fileName){

//cout<<a<<" "<<s<<" "<<d<<" "<<w<<endl;

fstream inStream;

GLint num; //记录每条线的顶点个数

inStream.open(fileName,ios::in);

if (inStream.fail())

{

return;

}

cout<<"file open succeed"<<endl;

glClear(GL_COLOR_BUFFER_BIT);

inStream>>numPolys; //线带的总条数（因为每条线带是多个顶点，顾用poly）

for(int j=0;j<numPolys;j++){ //每条折线

inStream>>num;

numPoints.push_back(num); //每条线带 所包含的 顶点个数

for(int i=0;i<num;++i){

GLPoint *pp = new GLPoint();

inStream>>pp->x>>pp->y;

pt.push_back(*pp); //顶点值存入数组中

}

}

inStream.close();

cout<<"file closed"<<endl;

}

void myKeyboard(unsigned char key,int x , int y){

switch (key)

{

case 'w':moved = true;xDirection=0;yDirection=1;glutPostRedisplay();

break;

case 'd':moved = true;xDirection = 1;yDirection=0;glutPostRedisplay();

break;

case 's':moved = true;xDirection = 0;yDirection=-1;glutPostRedisplay();

break;

case 'a':moved = true;xDirection = -1;yDirection=0;glutPostRedisplay();

break;

default:break;

}

}

void myDisplay(void){

glClear(GL_COLOR_BUFFER_BIT);

cout<<endl;

cout<<endl;

cout<<endl;

GLint number = 0;

for (int j=0;j<numPolys;j++) //多少条线，就有多少次循环

{

cout<<"线条个数："<<numPolys<<endl;

glBegin(GL_LINE_STRIP);

cout<<"顶点坐标：";

for (int i = 0;i<numPoints[j];i++)

{

pt[number].x += xDirection;

pt[number].y += yDirection;

glVertex2i(pt[number].x,pt[number].y);

number++;

}

glEnd();

cout<<endl;

}

glutSwapBuffers();

}

void myInit(void){

glClearColor(1.0,1.0,1.0,0.0);

glColor3f(0.0f, 0.0f, 0.0f);

glPointSize(1.0);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluOrtho2D(0.0,(GLdouble)screenWidth,0.0,(GLdouble)screenHeight);

readFromFile("D:\\dino.dat");

}