電腦圖學
(1)主題:檔案
先用codeblocks開啟貝殼圖示
接下來便開始寫有關讀出20個Hello World的字串
#include <stdio.h> FILE*fout=NULL;///(1)宣告一個檔案指標 int main() { ///檔案寫檔 fout=fopen("filename.txt","w++");///(2)我們要開檔案 for(int i=0;i<20;i++) { ///printf("Hello World\n"); fprintf(fout,"Hello World\n");///(3)印出來到檔案 } }
讀出20個0.00的字串
程式碼如下:
#include <stdio.h>
FILE*fout2=NULL;///Now2 寫另一個檔案
FILE*fin2=NULL;///Now2 寫另一個檔案
float angle[20];///Now2 寫另一個檔案
int main()
{
///檔案寫檔
fout2=fopen("motion.txt", "w+");///Now2 另一個有關節的檔案
for(int i=0;i<20;i++)
{
///printf("Hello World\n");
fprintf(fout2, " %.2f ", angle[i]);///Now2 另一個有關節的檔案
///加空格，是因為怕數字連起來
///若沒有空格，數字就真的連起來
}
}
(2)主題:關節、擺動作
#include <GL/glut.h> float angle[20];///NOW2 void display() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPushMatrix(); glColor3f(1, 1, 1);///white glutSolidTeapot( 0.3 );///body glPushMatrix(); glTranslatef(0.2, 0, 0);///NOW2 (3)掛上去 glRotatef(angle[1], 0,0,1);///NOW2 ///(2)旋轉 glTranslatef(0.15, 0, 0);///NOW2 (1)旋轉中心 glColor3f(1, 0, 0);///red glutSolidTeapot( 0.2 );///right arm glPopMatrix(); glPopMatrix(); glutSwapBuffers(); } int oldX=0;///NOW2 void mouse(int button, int state, int x, int y)///NOW2 {///NOW2 oldX = x;///NOW2 } void motion(int x, int y)///NOW2 {///NOW2 angle[1] += x-oldX;///NOW2 oldX = x;///NOW2 display();///NOW2 } int main(int argc, char**argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH); ///glutInitWindowSize(600,600);///可以開大一點的window glutCreateWindow("Week 13 angle motion file"); glutMouseFunc(mouse);///NOW2 glutMotionFunc(motion);///NOW2 glutDisplayFunc(display); glutMainLoop(); }
用鍵盤數字來操控各個手臂
#include <GL/glut.h>
float angle[20];///NOW2
int angleID=1;///NOW3
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glColor3f(1, 1, 1);///white
glutSolidTeapot( 0.3 );///body
glPushMatrix();///右邊
glTranslatef(0.2, 0, 0);///NOW2 (3)掛上去
glRotatef(angle[1], 0,0,1);///NOW2 ///(2)旋轉
glTranslatef(0.15, 0, 0);///NOW2 (1)旋轉中心
glColor3f(1, 0, 0);///red
glutSolidTeapot( 0.2 );///right arm
glPushMatrix();
glTranslatef(0.2, 0, 0);///NOW2 (3)掛上去
glRotatef(angle[2], 0,0,1);///NOW2 ///(2)旋轉
glTranslatef(0.15, 0, 0);///NOW2 (1)旋轉中心
glColor3f(1, 0, 0);///red
glutSolidTeapot( 0.2 );///right lower arm
glPopMatrix();
glPopMatrix();
glPushMatrix();///左邊
glTranslatef(-0.2, 0, 0);///NOW2 (3)掛上去
glRotatef(angle[3], 0,0,1);///NOW2 ///(2)旋轉
glTranslatef(-0.15, 0, 0);///NOW2 (1)旋轉中心
glColor3f(1, 0, 0);///red
glutSolidTeapot( 0.2 );///right arm
glPushMatrix();
glTranslatef(-0.2, 0, 0);///NOW2 (3)掛上去
glRotatef(angle[4], 0,0,1);///NOW2 ///(2)旋轉
glTranslatef(-0.15, 0, 0);///NOW2 (1)旋轉中心
glColor3f(1, 0, 0);///red
glutSolidTeapot( 0.2 );///right lower arm
glPopMatrix();
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int oldX=0;///NOW2
void mouse(int button, int state, int x, int y)///NOW2
{///NOW2
oldX = x;///NOW2
}
#include <stdio.h>///NOW3
void motion(int x, int y)///NOW2
{///NOW2
angle[angleID] += x-oldX;///NOW3
oldX = x;///NOW2
for(int i=0;i<20;i++){///NOW3
printf(" %.2f ", angle[i]);///NOW3
}
printf("\n");///NOW3
display();///NOW2
}
void keyboard(unsigned char key, int x, int y)///NOW3
{///NOW3
if(key=='1') angleID=1;///NOW3
if(key=='2') angleID=2;///NOW3
if(key=='3') angleID=3;///NOW3
if(key=='4') angleID=4;///NOW3
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
///glutInitWindowSize(600,600);///可以開大一點的window
glutCreateWindow("Week 13 angle motion file");
glutKeyboardFunc(keyboard);///NOW3
glutMouseFunc(mouse);///NOW2
glutMotionFunc(motion);///NOW2
glutDisplayFunc(display);
glutMainLoop();
}
現在起開始讀入檔案!!
程式碼如下:
#include <GL/glut.h>
#include <stdio.h>///NOW_FILE (0)
float angle[20];///NOW2
int angleID=1;///NOW3
FILE * fout = NULL;///NOW_FILE (1)
FILE * fin = NULL;///NOW_FILE_READ (1)
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glColor3f(1, 1, 1);///white
glutSolidTeapot( 0.3 );///body
glPushMatrix();///右邊
glTranslatef(0.2, 0, 0);///NOW2 (3)掛上去
glRotatef(angle[1], 0,0,1);///NOW2 ///(2)旋轉
glTranslatef(0.15, 0, 0);///NOW2 (1)旋轉中心
glColor3f(1, 0, 0);///red
glutSolidTeapot( 0.2 );///right arm
glPushMatrix();
glTranslatef(0.2, 0, 0);///NOW2 (3)掛上去
glRotatef(angle[2], 0,0,1);///NOW2 ///(2)旋轉
glTranslatef(0.15, 0, 0);///NOW2 (1)旋轉中心
glColor3f(1, 0, 0);///red
glutSolidTeapot( 0.2 );///right lower arm
glPopMatrix();
glPopMatrix();
glPushMatrix();///左邊
glTranslatef(-0.2, 0, 0);///NOW2 (3)掛上去
glRotatef(angle[3], 0,0,1);///NOW2 ///(2)旋轉
glTranslatef(-0.15, 0, 0);///NOW2 (1)旋轉中心
glColor3f(1, 0, 0);///red
glutSolidTeapot( 0.2 );///right arm
glPushMatrix();
glTranslatef(-0.2, 0, 0);///NOW2 (3)掛上去
glRotatef(angle[4], 0,0,1);///NOW2 ///(2)旋轉
glTranslatef(-0.15, 0, 0);///NOW2 (1)旋轉中心
glColor3f(1, 0, 0);///red
glutSolidTeapot( 0.2 );///right lower arm
glPopMatrix();
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int oldX=0;///NOW2
void mouse(int button, int state, int x, int y)///NOW2
{///NOW2
oldX = x;///NOW2
}
void motion(int x, int y)///NOW2
{///NOW2
angle[angleID] += x-oldX;///NOW3
oldX = x;///NOW2
if(fout == NULL) fout = fopen("motion.txt", "w+");///NOW_FILE (2)
for(int i=0;i<20;i++){///NOW3
printf(" %.2f ", angle[i]);///NOW3
fprintf(fout, " %.2f ", angle[i]);///NOW_FILE
}
printf("\n");///NOW3
fprintf(fout, "\n");///NOW_FILE
display();///NOW2
}
void keyboard(unsigned char key, int x, int y)///NOW3
{///NOW3
if(key=='1') angleID=1;///NOW3
if(key=='2') angleID=2;///NOW3
if(key=='3') angleID=3;///NOW3
if(key=='4') angleID=4;///NOW3
if(key=='w'){///NOW_FILE
fout = fopen("motion.txt", "w+");///NOW_FILE (2)
}
if(key=='r'){
if(fin==NULL) fin = fopen("motion.txt", "r");///NOW_FILE_READ (2)
///scanf("%d", &n);
for(int i=0;i<20; i++){///NOW_FILE_READ
fscanf(fin, "%f", &angle[i]);///NOW_FILE_READ
printf(" %.2f ", angle[i]);///順便印出來看數字對不對
}
}
glutPostRedisplay();///NOW_FILE_READ 和 display()很像
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
///glutInitWindowSize(600,600);///可以開大一點的window
glutCreateWindow("Week 13 angle motion file");
glutKeyboardFunc(keyboard);///NOW3
glutMouseFunc(mouse);///NOW2
glutMotionFunc(motion);///NOW2
glutDisplayFunc(display);
glutMainLoop();
}
這是按R鍵所呈現的效果
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