YiTing_week06

 1.

電腦圖學之父:Ivan Sutherland

2.

執行模型時，若朝模型下方按右鍵會出現swap translate/rotate，可改變模型是公轉(rotate_以場景為中心)或自轉(translate_以模型為中心)

3.

4.茶壺可用滑鼠拖動

完整程式碼：

#include <GL/glut.h>

#include <stdio.h>

float x=0,y=0,z=0,oldX,oldY;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

       glTranslatef((x-150)/150.0,-(y-150)/150.0,z);///移動

       glColor3f(1,1,0);

       glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void keyboard(unsigned char key,int mouseX,int mouseY)

{

    printf("現在按下:%c 座標在:%d %d\n",key,x,y);///滑鼠到哪，且按下鍵盤任意按鍵就會印出哪的座標

}

void mouse(int button, int state,int mouseX,int mouseY)

{

    oldX=mouseX;

    oldY=mouseY;

}

void motion(int mouseX,int mouseY)

{

    x+=(mouseX-oldX);

    y+=(mouseY-oldY);

    oldX=mouseX;

    oldY=mouseY;

    display();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week06 keyboard");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}

5.用滑鼠拖動可放大縮小

完整程式碼:

#include <GL/glut.h>

#include <stdio.h>

float x=0,y=0,z=0,scale=1.0,oldX,oldY;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

       glScalef(scale,scale,scale);///放大縮小

       glColor3f(1,1,0);

       glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void keyboard(unsigned char key,int mouseX,int mouseY)

{

    printf("現在按下:%c 座標在:%d %d\n",key,x,y);///滑鼠到哪，且按下鍵盤任意按鍵就會印出哪的座標

}

void mouse(int button, int state,int mouseX,int mouseY)

{

    oldX=mouseX;

    oldY=mouseY;

}

void motion(int mouseX,int mouseY)

{

    /*x+=(mouseX-oldX);

    y+=(mouseY-oldY);*/

    if(mouseX>oldX)scale=scale*1.01;

    if(mouseX<oldX)scale=scale*0.99;

    oldX=mouseX;

    oldY=mouseY;

    display();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week06 keyboard");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}

6.用鍵盤控制茶壺

#include <GL/glut.h>

#include <stdio.h>

float x=0,y=0,z=0,scale=1.0,angle=0.0,oldX,oldY;

int now=1;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

       glTranslatef((x-150)/150.0,-(y-150)/150.0,z);

       glScalef(scale,scale,scale);

       glRotatef(angle,0,0,1);

       glColor3f(1,1,0);

       glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void keyboard(unsigned char key,int mouseX,int mouseY)

{

    if(key=='w'||key=='W')now=1;///移動

    if(key=='e'||key=='E')now=2;///旋轉

    if(key=='r'||key=='R')now=3;///縮放

}

void mouse(int button, int state,int mouseX,int mouseY)

{

    oldX=mouseX;

    oldY=mouseY;

}

void motion(int mouseX,int mouseY)

{

    /*x+=(mouseX-oldX);

    y+=(mouseY-oldY);*/

    if(mouseX>oldX)scale=scale*1.01;

    if(mouseX<oldX)scale=scale*0.99;

    oldX=mouseX;

    oldY=mouseY;

    display();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week06 keyboard");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}

7.