绘制dinosaur恐龙 源码

#include<windows.h>
#include<math.h>
#include <gl/GL.h>
#include <gl/GLU.h>
#include <gl/Glut.h>
#include <fstream>
#include <iostream>

using namespace std;

void myDisplay(void);
void myInit(void);
void drawPolyLineFile(char *fileName);

const GLint screenWidth = 640;
const GLint screenHeight = 480;

int main(int argc, char ** argv){
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
    glutInitWindowSize(screenWidth,screenHeight);
    glutInitWindowPosition(100,150);
    glutCreateWindow("Dinosaur");

    glutDisplayFunc(myDisplay);
    myInit();
    glutMainLoop();
    
    return 0;
}

void drawPolyLineFile(char *fileName){
    fstream inStream;
    inStream.open(fileName);
    if (inStream.fail())
    {
        return;
    }

    //file open succeed

    glClear(GL_COLOR_BUFFER_BIT);
    GLint numPolys, numLines, x, y;
    inStream>>numPolys;
    for(int j=0;j<numPolys;j++){
        inStream>>numLines;
        glBegin(GL_LINE_STRIP);
        for(int i=0;i<numLines;++i){
            inStream>>x>>y;
            glVertex2i(x,y);
        }
        glEnd();
    }
    glFlush();

    cout<<"file opened"<<endl;
    inStream.close();
}

void myDisplay(void){
    drawPolyLineFile("D:\\dino.dat");
}

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);

}

dino.dat 文件：

http://web.cs.wpi.edu/~gogo/courses/cs4731/assignments/ass1/dino.dat