123電腦圖學 T-R-T 特定軸轉

week05 T-R-T 特定軸轉

第一堂課

https://jsyeh.org/3dcg10/  下載deta,win32(解壓縮)

解壓縮完開啟Transformation =>複習上周的旋轉、移動

開啟一個新專案=>week05-1 TRT translate

並把week04-1的程式碼貼上並修改

得到新的程式碼=>兩個不同色的茶壺旋轉

#include <GL/glut.h>

float angle = 0;

void display()

{

 glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

 glColor3f(1, 0, 0);

 glPushMatrix();

    glRotatef(angle, 0, 0, 1);

    glTranslatef(0.8, 0, 0);

    glutSolidTeapot( 0.3 );

 glPopMatrix();

 glColor3f(0, 1, 0);

 glPushMatrix();

    glTranslatef(0.8, 0, 0);

    glRotatef(angle*1.5, 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();

}

第二堂課

跑openGL程式

按to draw 可以畫身體和手臂

練習下禮拜的小考

第三堂課

開啟新專案 week05-2_T-R-T robot

並貼上week05-1 並修改

#include <GL/glut.h>

float angle = 0;

void myCube()

{

   glPushMatrix();

     glScalef(0.5, 0.2, 0.2);

     glutSolidCube(1);

   glPopMatrix();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glPushMatrix();

     glRotatef(angle, 0, 0, 1);

     glTranslatef(0.25, 0, 0);

     myCube();

   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();

}

得到一個旋轉的方塊

製作機械手臂

#include <GL/glut.h>

float angle = 0;

void myCube()

{

   glPushMatrix();

     glScalef(0.5, 0.2, 0.2);

     glutSolidCube(1);

   glPopMatrix();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glColor3f(1,1,1);

    glutSolidCube(1);

    glPushMatrix();

     glTranslatef(0.5, 0.5, 0);

     glRotatef(angle, 0, 0, 1);

     glTranslatef(0.25, 0, 0);

     glColor3f(0,1,0);

     myCube();

   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();

}

兩個手臂

增加程式碼=>將0.5改成-0.5

  glPushMatrix();

     glTranslatef(-0.5, 0.5, 0);

     glRotatef(angle, 0, 0, 1);

     glTranslatef(0.25, 0, 0);

     glColor3f(0,1,0);

     myCube();

   glPopMatrix();

了解Martix