涵030 week06 筆記

 第一節課:

觀看電腦圖學之父的影片

06-0

下方右鍵 Swap Translate/Rotate

自轉&公轉

完成程式碼五步驟

06-1

按按鍵，出現座標

程式碼如下:

(黃色螢光代表這次新增的)

#include <GL/glut.h>

#include <stdio.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        glColor3f(1,1,0);///修改顏色

        glutSolidTeapot(0.3);///修改物品

    glutSwapBuffers();

}

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

{

    printf("現在按下:%c 座標在:%d %d\n", key, x, y);

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week06_keyboard");

     glutDisplayFunc(display);

     glutKeyboardFunc(keyboard);

     glutMainLoop();

}

06-2(未完成)

程式碼如下:

(黃色螢光代表這次新增的)

#include <GL/glut.h>

#include <stdio.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        glColor3f(1,1,0);///修改顏色

        glutSolidTeapot(0.3);///修改物品

    glutSwapBuffers();

}

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

{

    printf("現在按下:%c 座標在:%d %d\n", key, x, 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_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week06_keyboard");

     glutDisplayFunc(display);

     glutKeyboardFunc(keyboard);

     glutMouseFunc(mouse);

     glutMotionFunc(motion);

     glutMainLoop();

}

06-3(未完成)

#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 );///Maya: w

     ///glRotatef( angle, 0, 0, 1);

     ///glScalef( scale, scale,scale);

        glColor3f(1,1,0);///修改顏色

        glutSolidTeapot(0.3);///修改物品

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    printf("現在按下:%c 座標在:%d %d\n", key, mouseX, mouseY);

}

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_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week06_keyboard");

     glutDisplayFunc(display);

     glutKeyboardFunc(keyboard);

     glutMouseFunc(mouse);

     glutMotionFunc(motion);

     glutMainLoop();

}

06-4(未完成縮放) 

程式碼:

(黃色螢光代表這次新增的)

#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();

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

     ///glRotatef( angle, 0, 0, 1);

     glScalef( scale, scale,scale);///Maya: r

        glColor3f(1,1,0);///修改顏色

        glutSolidTeapot(0.3);///修改物品

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    printf("現在按下:%c 座標在:%d %d\n", key, mouseX, mouseY);

}

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

{

    oldX = mouseX; oldY = mouseY;

}

void motion( int mouseX, int mouseY )

{

    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_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week06_keyboard");

     glutDisplayFunc(display);

     glutKeyboardFunc(keyboard);

     glutMouseFunc(mouse);

     glutMotionFunc(motion);

     glutMainLoop();

}

06-5(未完成旋轉)

06-6(完成!!!)

完整程式碼如下:

#include <GL/glut.h>

#include <stdio.h>

float x=250,y=250,z=0,scale=1.0,angle=0.0,oldX,oldY;

int now=1;///1移動2旋轉3縮放

void display()

{

    glClearColor(0.5, 0.5, 0.5, 1);///用來Clear色彩 R、G、B、A

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

     glPushMatrix();

     glTranslatef((x-250)/250.0,-(y-250)/250.0, z );///Maya: w

     glRotatef( angle, 0, 0, 1);///Maya: e

     glScalef( scale, scale,scale);///Maya: r

        glColor3f(1,1,0);///修改顏色

        glutSolidTeapot(0.3);///修改物品

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    //printf("現在按下:%c 座標在:%d %d\n", key, mouseX, 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 )

{

    if(now==1){///移動

        x += (mouseX-oldX);

        y += (mouseY-oldY);

    }else if(now==2){///旋轉

        angle += (mouseX-oldX);

    }else if(now==3){

    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_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week06_keyboard");

     glutDisplayFunc(display);

     glutKeyboardFunc(keyboard);

     glutMouseFunc(mouse);

     glutMotionFunc(motion);

     glutMainLoop();

}

1.為什麼150變成250?    因為原本是(300,300)後變成(500,500)

上面變視窗大小的主要程式碼為: glutInitWindowSize