Kuo's Graphic_Note_Week12

 

Step 1 : Using Example (Light Material.exe) to Know What We Want to Make.

    1-1.Download Example (URL: https://jsyeh.org/3dcg10/)

    

    1-2. Put file "data" to file "windows"

    1-3. Open example (Path:windows/Transformation.exe)

    1-4. Open Transformation.exe

    1-5. Where is the axis of rotation and how to rotate

     1-6. Rotating

     1-7. Swap translate/rotate

    
     1-8. Where is the axis of rotation and how to rotate

    1-9. Rotating

     1-10. Grouping and explanation

     1-11. Grouping and explanation

Step 2 : Using the Website to Simulate OpenGL

    2-1. Open the website      

    (URL:https://120.125.80.50/GL/opengl_TRT_demo.html)

   2-2. Using this website to draw a graphics

   2-3. Change the place of "myDrawObject(0);" , then press "Space" to rotate the triangle

Step 3 :  Using CodeBlocks to Make "TRT".

    3-1. Coding (Make a white teapot)

    3-2. Build & Run

    3-3. Coding

    3-4. Build & Run

    3-5. Coding

    3-6. Build & Run

Final Code:

#include <GL/glut.h>

float angle=0;

void display(){

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,0,1);

        glTranslatef(0.4,-0.07,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

    angle++;

}

int main(int argc,char**argv){

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week12 TRT");

    glutIdleFunc(display);

    glutDisplayFunc(display);

    glutMainLoop();

}

Step 4 :  Using CodeBlocks to Make "TRT".

    4-1. Coding

    4-2. Build & Run

    4-3. Coding

    4-4. Build & Run

    4-5. Coding

   4-6. Build & Run

Final Code:

#include <GL/glut.h>

float angle=0;

void display(){

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glColor3f(1,1,1);

    glutSolidTeapot(0.3);

    glPushMatrix();

        glTranslatef(0.3,0,0);

        glRotatef(angle,0,0,1);

        glTranslatef(0.2,0,0);

        glColor3f(1,0,0);

        glutSolidTeapot(0.2);

        glPushMatrix();

            glTranslatef(0.2,0,0);

            glRotatef(angle,0,0,1);

            glTranslatef(0.2,0,0);

            glColor3f(1,0,0);

            glutSolidTeapot(0.2);

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

    angle++;

}

int main(int argc,char**argv){

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week12 TRT");

    glutIdleFunc(display);

    glutDisplayFunc(display);

    glutMainLoop();

}