m week04 旋轉Rotate

 week04

step01-1

打開https://jsyeh.org/3dcg10/

下載 Example: data,win32

解壓縮後把data放入windows資料夾

step01-2

然後打開 transformation.exe

試著把glRotate改成

旋轉x軸車頭往下跑

接著改成

旋轉z軸車頭右側往上跑

再改成

旋轉軸側側邊轉動

step02-1 

解壓縮freeglut

把檔案裡的freeglut放在桌面

打開freeglut/lib 複製libfreeglut.a 改成libglut32.a

開啟codeblocks 打開 File-New-project 

選擇GLUT 檔名week04-1_GLUT_rotate

複製上週程式碼

#include <GL/glut.h>
	void display()
	{
	glutSolidTeapot( 0.3 );
	glutSwapBuffers();
	}
	int main(int argc, char *argv[])
	{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
	glutCreateWindow("week03");
	glutDisplayFunc(display);
	glutMainLoop();
	}

改成

#include <GL/glut.h>

float angle;

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();

}

step02-2 打光

開新專案

week04-2_rotate_light

複製week01程式碼

增加

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);

}

變成

#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();

}

step03-1

把glRotatef和glTranslatef調換

自轉

公轉

在調整數字

step03-2

開新專案 week04_rotate_tarnslate

複製week04-1程式碼

增加程式碼變成

#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("week03");

glutDisplayFunc(display);

glutIdleFunc(display);

glutMainLoop();

}

複製

glPushMatrix();

        glTranslatef(0.5, 0, 0);

        glRotatef(angle, 0, 1, 0);

        glColor3f(0,0,1);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

並貼上

glTranslatef(0.5, 0, 0);和 glRotatef(angle, 0, 1, 0);交換

增加glTranslatef(0, 0.5, 0);

改成

glPushMatrix();

        glRotatef(angle, 0, 1, 0);

        glTranslatef(0.5, 0, 0);

        glColor3f(1,1,0);

        glTranslatef(0, 0.5, 0);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

變成

#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);//藍色茶壺

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glPushMatrix();

        glRotatef(angle, 0, 1, 0);

        glTranslatef(0.5, 0, 0);

        glColor3f(1,1,0);//黃色茶壺

        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("week03");

glutDisplayFunc(display);

glutIdleFunc(display);

glutMainLoop();

}