2020電腦圖學A: :D~week14

🔴先新增一個.cpp檔，寫出程式，按完建置會出現file.o檔
#include <stdio.h>
int main()
{
FILE * fout=fopen("檔名.txt","w+");

printf( "Hello world\n");
fprintf(fout,"Hello world in file\n");
}

🔴執行後會出現"檔名.txt"的文字檔，印出fprint裡的文字

🔴修改程式碼，加入for迴圈試試看
#include <stdio.h>
int main()
{
FILE * fout=fopen("檔名2.txt","w+");

for(int i=0;i<20;i++)
{
printf( "Hello %d\n",i);
fprintf(fout,"Hello %d\n",i);
}
}

🔴印出文字和整數

🔴數字黏在一起是錯的

🔴加了空格分開數字，再加一個跳行，不然會太長不好看

🔴開新專案，寫出機器人程式的雛型
#include <GL/glut.h>
int angle[10]={0,0,0,0,0, 0,0,0,0,0};
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1); ///白色
glutSolidTeapot(0.2); ///身體

glPushMatrix(); ///右側
glTranslatef(0.2, 0,0 );
glRotatef(angle[0], 0,0,1);
glTranslatef(0.2, 0,0 );

glColor3f(1,0,0); ///紅色
glutSolidTeapot(0.2); ///右上手臂

glPushMatrix();
glTranslatef(0.2, 0,0);
glRotatef(angle[1], 0,0,1);
glTranslatef(0.2, 0,0);

glColor3f(1,1,0); ///黃色
glutSolidTeapot(0.2); ///右下手臂

glPopMatrix();
glPopMatrix(); ///右側

glPushMatrix(); ///左側
glTranslatef(-0.2, 0,0 );
glRotatef(angle[2], 0,0,1);
glTranslatef(-0.2, 0,0 );

glColor3f(0,1,0); ///綠色
glutSolidTeapot(0.2); ///左上手臂

glPushMatrix();
glTranslatef(-0.2, 0,0);
glRotatef(angle[3], 0,0,1);
glTranslatef(-0.2, 0,0);

glColor3f(0,0,1); ///藍色
glutSolidTeapot(0.2); ///左下手臂

glPopMatrix();
glPopMatrix(); ///左側
glutSwapBuffers();
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("Week14 file");

glutDisplayFunc(display);
glutMainLoop();
}

🔴寫出能按鍵盤，用滑鼠點擊轉動的關節
#include <GL/glut.h>
int angle[10]={0,0,0,0,0, 0,0,0,0,0};
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1); ///白色
glutSolidTeapot(0.2); ///身體

glPushMatrix(); ///右側
glTranslatef(0.2, 0,0 );
glRotatef(angle[0], 0,0,1);
glTranslatef(0.2, 0,0 );

glColor3f(1,0,0); ///紅色
glutSolidTeapot(0.2); ///右上手臂

glPushMatrix();
glTranslatef(0.2, 0,0);
glRotatef(angle[1], 0,0,1);
glTranslatef(0.2, 0,0);

glColor3f(1,1,0); ///黃色
glutSolidTeapot(0.2); ///右下手臂

glPopMatrix();
glPopMatrix(); ///右側

glPushMatrix(); ///左側
glTranslatef(-0.2, 0,0 );
glRotatef(angle[2], 0,0,1);
glTranslatef(-0.2, 0,0 );

glColor3f(0,1,0); ///綠色
glutSolidTeapot(0.2); ///左上手臂

glPushMatrix();
glTranslatef(-0.2, 0,0);
glRotatef(angle[3], 0,0,1);
glTranslatef(-0.2, 0,0);

glColor3f(0,0,1); ///藍色
glutSolidTeapot(0.2); ///左下手臂

glPopMatrix();
glPopMatrix(); ///左側
glutSwapBuffers();
}
int angleID=0; ///0,1,2,3
int oldX, oldY;
void mouse(int button, int state, int x, int y)
{///TODO2:備份(old)mouse位置
oldX=x; oldY=y; ///TODO2:備份(old)mouse位置
}
void motion(int x, int y)
{///TODO2:滑動,更新 angleID對應的angle[]
angle[angleID] += (x-oldX);
oldX=x;
glutPostRedisplay(); ///TODO2:重畫畫面
}
void keyboard(unsigned char key, int x, int y)
{///TODO2: 鍵盤,選angleID
if(key=='0') angleID=0;
if(key=='1') angleID=1;
if(key=='2') angleID=2;
if(key=='3') angleID=3;
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("Week14 file");

glutDisplayFunc(display);
glutMouseFunc(mouse); ///TODO2:備份(old)mouse位置
glutMotionFunc(motion); ///TODO2:滑動,更新 angleID對應的angle[]
glutKeyboardFunc(keyboard); ///TODO2: 鍵盤,選angleID
glutMainLoop();
}

🔴轉動時會存取數值
#include <GL/glut.h>
int angle[10]={0,0,0,0,0, 0,0,0,0,0};
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1); ///白色
glutSolidTeapot(0.2); ///身體

glPushMatrix(); ///右側
glTranslatef(0.2, 0,0 );
glRotatef(angle[0], 0,0,1);
glTranslatef(0.2, 0,0 );

glColor3f(1,0,0); ///紅色
glutSolidTeapot(0.2); ///右上手臂

glPushMatrix();
glTranslatef(0.2, 0,0);
glRotatef(angle[1], 0,0,1);
glTranslatef(0.2, 0,0);

glColor3f(1,1,0); ///黃色
glutSolidTeapot(0.2); ///右下手臂

glPopMatrix();
glPopMatrix(); ///右側

glPushMatrix(); ///左側
glTranslatef(-0.2, 0,0 );
glRotatef(angle[2], 0,0,1);
glTranslatef(-0.2, 0,0 );

glColor3f(0,1,0); ///綠色
glutSolidTeapot(0.2); ///左上手臂

glPushMatrix();
glTranslatef(-0.2, 0,0);
glRotatef(angle[3], 0,0,1);
glTranslatef(-0.2, 0,0);

glColor3f(0,0,1);///藍色
glutSolidTeapot(0.2);///左下手臂

glPopMatrix();
glPopMatrix();///左側
glutSwapBuffers();
}
int angleID=0;///0,1,2,3
int oldX, oldY;
void mouse(int button, int state, int x, int y)
{///TODO2:備份(old)mouse位置
oldX=x; oldY=y;///TODO2:備份(old)mouse位置
}
#include <stdio.h> ///TODO3: 外掛
FILE * fout=NULL;///TODO3
void saveAll()///TODO3: (自己寫的函式)全部存檔
{
if(fout==NULL) fout=fopen("motion.txt", "w+");///TODO3:開檔
for(int i=0; i<10; i++){///TODO3: for迴圈,把陣列全用
printf( "%d ", angle[i]);///TODO3: 印畫面
fprintf(fout, "%d ", angle[i]);///TODO3: 寫檔案
}
printf( "\n");///TODO3: 跳行, 畫面不會亂
fprintf(fout, "\n");///TODO3: 跳行, 畫面不會亂
}
void motion(int x, int y)
{///TODO2:滑動,更新 angleID對應的angle[]
angle[angleID] += (x-oldX);
oldX=x;
saveAll();///TODO3: (自己寫的函式)全部存檔
glutPostRedisplay();///TODO2:重畫畫面
}
void keyboard(unsigned char key, int x, int y)
{///TODO2: 鍵盤,選angleID
if(key=='0') angleID=0;
if(key=='1') angleID=1;
if(key=='2') angleID=2;
if(key=='3') angleID=3;
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("Week14 file");

glutDisplayFunc(display);
glutMouseFunc(mouse);///TODO2:備份(old)mouse位置
glutMotionFunc(motion);///TODO2:滑動,更新 angleID對應的angle[]
glutKeyboardFunc(keyboard);///TODO2: 鍵盤,選angleID
glutMainLoop();
}

🔴按下R鍵，執行剛剛存取的數值多加此程式
if(key=='r')
{
if(fin==NULL)fin=fopen("motion.txt","r"); ///開檔
for(int i=0;i<10;i++)
{
fscanf(fin,"%d",&angle[i]); ///讀檔
}
glutPostRedisplay(); ///重畫
}
}