諺哥電腦圖學筆記 week05

 

a:keyboard(鍵盤函式)

重要詞彙:

1.glutKeyboardFunc(keyboard); ///鍵盤函式,可辨別你鍵盤按了甚麼

程式碼:

#include <GL/glut.h>///使用外掛,簡化程式

#include <stdio.h>

void display()

{

     glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); ///畫圖前,清畫面

    glColor3f(1,1,0); ///設定色彩(黃色)

    glutSolidTeapot(0.3); ///實心的茶壺

    glutSwapBuffers(); ///畫好後,交換出來

}

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

{

    printf("你按下 %c 在 %d %d 座標\n",key,x,y);///可辨別你鍵盤按了甚麼

}

int main(int argc,char**argv)///main()主函式進階版

{

    glutInit(&argc,argv);///把參數給glutInit初始化

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);///雙緩衝區,3D深度功能

    glutCreateWindow("第05的程式keyboard");///開啟GLUT視窗

    glutDisplayFunc(display);///用來顯示函式,display是函式

    glutKeyboardFunc(keyboard);///鍵盤函式

    glutMainLoop(); /// 將點連接起來

}

#include <GL/glut.h>

#include <stdio.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(1,1,0);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

}

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

{

}

void motion(int x,int y)

{

}

int main(int argc, char **argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week05 keyboard");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}

#include <GL/glut.h>

#include <stdio.h>

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

int oldX=0,oldY=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

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

    glColor3f(1,1,0);

    glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

}

void mouse(int button,int state,int mouseX,int 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("week05 keyboard");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}

#include <GL/glut.h>

#include <stdio.h>

float x=150,y=150,z=0,scale=1.0;

int oldX=0,oldY=0;

void display()

{

    glClearColor(0.5,0.5,0.5,1);

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

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

    glScalef(scale,scale,scale);

    glColor3f(1,1,0);

    glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

}

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

{

    oldX = mouseX; oldY=mouseY;

}

void motion(int mouseX,int mouseY)

{

    if(mouseX-oldX>0) scale*=1.01;

    if(mouseX-oldX<0) scale*=0.99;

    oldX=mouseX; oldY=mouseY;

    display();

}

int main(int argc, char **argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week05 keyboard");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}