OpenGL txt File 이용해 그래픽 불러 들이기 - box

8 (꼭지점의 갯수, 정수타입)
 -1.0  -1.0  1.0 
 -1.0    1.0    1.0  
  1.0    1.0    1.0  
  1.0  -1.0    1.0
 -1.0  -1.0  -1.0  
 -1.0    1.0 -1.0
  1.0   1.0  -1.0
  1.0  -1.0  -1.0

* 8개의 줄, 각각의 하나는 꼭지점의 x,y,z 값을 의미한다

6 (면의 갯수, 정수타입)
0 3 2 1
2 3 7 6
3 0 4 7
1 2 6 5
4 5 6 7
5 4 0 1

#include <gl/glut.h> #include <stdio.h> #include <math.h> #include <iostream> using namespace std; #define PI 3.1415926 #define M 36 #define N 18 float radius = 1; float theta; float phi; float delta_theta; float delta_phi; float cameraX = 3; float cameraY = 3; float cameraZ = 3; struct POINT3D { float x; float y; float z; }; POINT3D *ver; struct FACE4D { int v1; int v2; int v3; int v4; }; FACE4D *face; int v_no; int f_no; float color[][3] = { (1.0, 1.0, 1.0), //흰색 (1.0, 0.0, 0.0), //빨강색 (0.0, 1.0, 0.0), //초록 (0.0, 0.0, 1.0), //파랑 (1.0, 1.0, 0.0), //노랑 (0.0, 1.0, 1.0), //시안 (1.0, 0.0, 1.0), //퍼플 (0.5, 0.5, 0.5) //회색 }; void File_Load(void) //파일불러들이기 { char *filename; FILE *fp; int i; filename = "box.txt"; fp = fopen(filename, "r"); fscanf(fp, "%d", &(v_no)); ver = new POINT3D[v_no]; for(i=0;i<v_no;i++) fscanf(fp, "%f %f %f", &(ver[i].x), &(ver[i].y), &(ver[i].z)); fscanf(fp, "%d", &(f_no)); face = new FACE4D[f_no]; for(i=0;i<f_no;i++) fscanf(fp, "%d %d %d %d", &(face[i].v1), &(face[i].v2), &(face[i].v3), &(face[i].v4)); } void init (void) { glClearColor (1.0, 1.0, 1.0, 0.0) ; glColor3f(1.0, 1.0, 0.0); glEnable(GL_DEPTH_TEST); // 깊이 활성화 File_Load(); } void reshape (int w, int h) { glViewport(0, 0, w, h); glMatrixMode (GL_PROJECTION); glLoadIdentity(); //glOrtho (-5.0, 5.0, -5.0, 5.0, -5.0, 5.0); gluPerspective(45.0, 1.0, 1.0, 100.0 ); // 멀고 가까움을 표현함 } void Draw_Box(void) { int i; for(i=0;i<f_no;i++) { glBegin(GL_POLYGON); glColor3f(color[face[i].v1][0], color[face[i].v1][1], color[face[i].v1][2]); glVertex3f(ver[face[i].v1].x, ver[face[i].v1].y, ver[face[i].v1].z); glColor3f(color[face[i].v2][0], color[face[i].v2][1], color[face[i].v2][2]); glVertex3f(ver[face[i].v2].x, ver[face[i].v2].y, ver[face[i].v2].z); glColor3f(color[face[i].v3][0], color[face[i].v3][1], color[face[i].v3][2]); glVertex3f(ver[face[i].v3].x, ver[face[i].v3].y, ver[face[i].v3].z); glColor3f(color[face[i].v4][0], color[face[i].v4][1], color[face[i].v4][2]); glVertex3f(ver[face[i].v4].x, ver[face[i].v4].y, ver[face[i].v4].z); glEnd(); } } void display (void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode (GL_MODELVIEW); glLoadIdentity(); gluLookAt(5.0, 5.0, 5.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0); glBegin(GL_LINES); // X, Y, Z 선 표시 glColor3f(1.0, 0.0, 0.0); // X축 glVertex3f(0.0, 0.0, 0.0); glVertex3f(10.0, 0.0, 0.0); glColor3f(0.0, 1.0, 0.0); // Y축 glVertex3f(0.0, 0.0, 0.0); glVertex3f(0.0, 10.0, 0.0); glColor3f(0.0, 0.0, 1.0); // Z축 glVertex3f(0.0, 0.0, 0.0); glVertex3f(0.0, 0.0, 10.0); glEnd(); Draw_Box(); glFlush (); glutSwapBuffers(); } void key(unsigned char key, int x, int y) { switch(key) { case 27: exit(0); break; } } void specialKey(int key, int x, int y) { switch(key) { case GLUT_KEY_LEFT: cameraX -= 1; break; case GLUT_KEY_RIGHT: cameraX += 1; break; case GLUT_KEY_UP: cameraY += 1; break; case GLUT_KEY_DOWN: cameraY -= 1; break; } //glutPostRedisplay(); } void main (int argc, char** argv) { glutInit (&argc, argv); glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH ); glutInitWindowPosition (100, 100); glutInitWindowSize (500, 500); glutCreateWindow ("Cube"); init(); glutDisplayFunc (display); glutReshapeFunc (reshape); glutKeyboardFunc(key); glutSpecialFunc(specialKey); glutIdleFunc(display); glutMainLoop(); }

box[1].txt