week06

茶壺打光、移動、轉動(複習)

#include <GL/glut.h>

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 type=1; ///1.rotate 2.translate

float teapotX=0,teapotY=0;

float teapotRotY=0;///轉動的變數

int oldX = 0, oldY = 0;

void mouse(int button, int state, int x, int y)

{

    ///mouse要可移動teapot(按下去)

    oldX=x;

    oldY=y;

}

void motion(int x,int y)

{

    if(type==1)

    {

        teapotRotY += x-oldX;

    }

    else if(type==2)

    {

        teapotX += x-oldX;

        teapotY += y-oldY;

    }

    oldX=x;

    oldY=y;

    glutPostRedisplay();///更新畫面

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslated( teapotX/250.0, -teapotY/250.0, 0);

        glRotatef(teapotRotY, 0,-1,0);///加Rot為自主轉動

        glRotatef(teapotX, 0,-1,0);///可上下移動

        glutSolidTeapot( 0.3 );

    glPopMatrix();///備份矩陣

    glutSwapBuffers();

    teapotRotY++;///每次多轉動1度

}

#include <stdio.h>

void keyboard(unsigned char key, int x, int y)

{///沒有正負號，全部都當正的來用

    if(key=='e' || key=='E') type=1;///Maya轉動1

    if(key=='w' || key=='W') type=2;///Maya轉動2

}

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

{

    glutInit(&argc, argv);

    glutInitWindowSize(500,500);

    glutInitWindowPosition(10,10);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutIdleFunc(display);///Idle閒置的時候就重劃

    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;

}