Week06

GLUT:移動 旋轉 茶壺

輸入w使茶壺移動

輸入e使茶壺旋轉

#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

    oldX=x;

    oldY=y;

}

void motion(int x,int y)///motion動

{

    if(type==1)///轉動

    {

        teapotRotY += x-oldX;

    }

    else if(type==2)///移動

    {

        teapotX += x-oldX;

        teapotY += y-oldY;

    }

    oldX=x;

    oldY=y;

    glutPostRedisplay();///更新畫面

}

void display(void)

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();///備份矩陣

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

        glRotatef( teapotRotY, 0, -1, 0);///x方向的動 vs Y軸

        glutSolidTeapot(0.3);

    glPopMatrix();///備份矩陣

    glutSwapBuffers();

}

#include <stdio.h>

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

{///沒有正負號,全部都當政的來用0...255

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

    if( key=='w' || key=='W' ) type=2;///MAYA:移動2

    printf("now; %c\n", key);

}

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);///輸入上面的函式

    glutMotionFunc(motion);///輸入上面的函式

    glutKeyboardFunc(keyboard);///輸入上面的函式

    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;

}