week05_light

#include <cstdio>

#include <GL/glut.h>

float X=0,Y=0;

int x=0,y=0;

float R=0,RC=0;

int tpye=0;

int OX=0;

float big=0.3;

void b(int a,int b,int c,int d )

{

    if(a==2)

    {

    tpye=1;

    printf("%d\n",tpye);

    }

    else{

            tpye=0;

    x=c;

    y=d;}

    if(a==3&&big>0.05){printf("%g\n",big);

            big-=0.05;

            glutPostRedisplay();}

    if(a==4&&big<0.95){big+=0.05;glutPostRedisplay();}

    printf("%d %d %d %d \n",a,b,c,d);

}

void c(int a,int b)

{

    if(tpye==1)

    {

        R+=a-x;

        x=a;

        glutPostRedisplay();

    }

    else

    {

    X+=a-x;

    Y-=b-y;

    x=a;

    y=b;

    OX+=a-x;

    printf("%d %d %d\n",x,y,OX);

    glutPostRedisplay();

    }

}

void a()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

    glTranslatef(X/250.0,Y/250.0,0);

    glRotated(R,RC,-1,0);

    glutSolidTeapot(big);///由上往下

    glPopMatrix();

    glutSwapBuffers();

}

const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };

const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };

const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };

const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };

const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat high_shininess[] = { 100.0f };

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

{

    glutInit(&argc, argv);

    glutInitWindowSize(500,500);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutDisplayFunc(a);

glutMotionFunc(c);

glutMouseFunc(b);

 glEnable(GL_DEPTH_TEST);

    glEnable(GL_LIGHT0);

    glEnable(GL_NORMALIZE);

    glEnable(GL_COLOR_MATERIAL);

    glEnable(GL_LIGHTING);

    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);

    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);

    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);

    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);

    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);

    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);

    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);

    glutMainLoop();

    return EXIT_SUCCESS;

}

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