於 week04

 Week04

旋轉Rotate

下載老師給的範例

到老師的網頁 https://jsyeh.org/3dcg10/ 下載 win32 和data

解壓縮win32 和 data

將data放入window

打開 Transformation.exe

後面的三個參數表示旋轉軸 Y 軸為(0,1,0)，旋轉角度為正

車子會水平往右旋轉\將後面旋轉軸改為 X軸(1,0,0)

旋轉角度為正車頭會往下將選轉軸更改為Z軸(0,0,1)

旋轉角度為正車子會向左傾斜，右邊較高，因為Z軸方向由里往外延伸

若旋轉軸為(1,1,0)，旋轉方向則會由左上往右下旋轉

旋轉白茶壺

week04-1

*glRotatef(angle, 0, 1, 0);旋轉

  angle 角度

開啟GLUT

複製上禮拜程式

#include <GL/glut.h>

float angle = 0; 

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0, 1, 0);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

    angle++;

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week03");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMainLoop();

}

旋轉黑茶壺(打光)

week04-2

*將與light相關的程式貼上

#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 };

void mylight()

{

    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);

}

float angle = 0; 

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0, 1, 0);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

    angle++;

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week04");

    mylight();

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMainLoop();

}

藍色茶壺

week04-3

*結果會呈現一個往右移的自轉藍色茶壺

#include <GL/glut.h>

float angle = 0; 

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(0.5, 0, 0);

        glRotatef(angle, 0, 1, 0);

        glColor3f(0, 0, 1);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

    angle++;

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week04");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMainLoop();

}

兩個茶壺

week04-4

*結果會呈現出公轉的黃色茶壺與自轉的藍色茶壺

#include <GL/glut.h>

float angle = 0; 

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(0.5, 0, 0);

        glRotatef(angle, 0, 1, 0);

        glColor3f(0, 0, 1);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glPushMatrix();

        glRotatef(angle, 0, 1, 0);

        glTranslatef(0.5, 0, 0);

        glColor3f(1, 1, 0);

        glTranslatef(0, 0.5, 0);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

    angle++;

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week04");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMainLoop();

}