week4

到網址http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/

下載：

把windows壓縮檔解壓，把glut32 & data丟到裡面，執行Transformation

到 https://www.transmissionzero.co.uk/software/freeglut-devel/

下載freeglut 做好前置作業

茶壺可隨著滑鼠移動

程式碼：

#include <GL/glut.h>

float x=0, y=0;

void display()

{

   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

   glPushMatrix();

       glTranslatef((x-150)/150.0, -(y-150)/150.0, 0);

       glutSolidTeapot(0.3);

   glPopMatrix();

   glutSwapBuffers();

}

void motion(int nowx,int nowy)

{

   x=nowx; y=nowy; ///更新x,y

   display(); ///再畫display()

}

int main(int argc, char ** argv)

{

   glutInit( &argc, argv); ///啟動GLUT

   glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

   glutCreateWindow("week3");

   glutDisplayFunc(display);

   glutMotionFunc(motion); ///滑鼠有動作motion時，要叫motion()

   glutMainLoop();

}

茶壺可隨著滑鼠左右移動來旋轉

程式碼：

#include <GL/glut.h>

float x=0, y=0;

void display()

{

   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); ///清畫面

   glPushMatrix();

       glRotatef(x, 0, 1, 0);

       ///glTranslatef((x-150)/150.0, -(y-150)/150.0, 0); ///移動

       glutSolidTeapot(0.3);

   glPopMatrix();

   glutSwapBuffers();

}

void motion(int nowx,int nowy)

{

   x=nowx; y=nowy; ///更新x,y

   display(); ///再畫display()

}

int main(int argc, char ** argv)

{

   glutInit( &argc, argv);

   glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

   glutCreateWindow("week4");

   glutDisplayFunc(display);

   glutMotionFunc(motion); ///負責motion的函式，要叫motion()

   glutMainLoop();

}