鹿的電腦圖學筆記week06

 Step01:

1.下載Data,win32

2.windows.zip解壓縮

data.zip把data資料夾移入windows

主題:Light Material.exe

左上:左鍵=>drag旋轉

左上:右鍵=>切換模型

左下:右鍵=>切換Material

Step02:

1.用ctrl+f尋找const

2.保留

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 };

     glEnable(GL_DEPTH_TEST);

    glDepthFunc(GL_LESS);

    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);

3.寫入

#include <GL/glut.h>

void Display(){

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

        glColor3f(1,1,0);

        glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week06_Light");

    glutDisplayFunc(Display);

    glutMainLoop();

}

4.把

glEnable(GL_DEPTH_TEST);

    glDepthFunc(GL_LESS);

    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);

移到這2行程式中間

glutCreateWindow("week06_Light");

glutDisplayFunc(Display);

如下

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week06_Light");

    glutDisplayFunc(Display);

    glEnable(GL_DEPTH_TEST);

    glDepthFunc(GL_LESS);

    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();

}

5.執行結果

Step03:

1.加入上週程式

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

int oldx=0,oldy=0;

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

}

void mouse(int button,int key,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();

}

在Display()加入

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

2.執行結果

Step04_轉動:

1.設值angle=0;

2.Display()加入glRotatef(angle,0,1,0);

3.改寫motion()加入

angle+=(mouseX-oldx);   //轉動

註解//    if(mouseX-oldx>0) scale*=1.01;

        //    if(mouseX-oldx<0) scale*=0.99;

如下:

void motion(int mouseX,int mouseY){

    angle+=(mouseX-oldx);   //轉動

//    if(mouseX-oldx>0) scale*=1.01;

//    if(mouseX-oldx<0) scale*=0.99;

    oldx=mouseX;oldy=mouseY;

    Display();

}

4.執行結果

Step05:

1.設值int now=1;///1移動2轉動3縮放

2.修改motion()

void motion(int mouseX,int mouseY){

    if(now==1){

        x+=(mouseX-oldx);y+=(mouseY-oldy);

    }

    else if(now==2)

        angle+=(mouseX-oldx);

    else if(now==3){

        if(mouseX-oldx>0) scale*=1.01;

        if(mouseX-oldx<0) scale*=0.99;

    }

    oldx=mouseX;oldy=mouseY;

    Display();

}

3.在kerboard加入

    if(key=='1'||key=='w'||key=='W') now=1;

    if(key=='2'||key=='e'||key=='E') now=2;

    if(key=='3'||key=='r'||key=='R') now=3;

4.執行結果

按1||w||W

按2|e||E

按3||r||R