openGL로 싸인곡선 그리기(sin wave)

오랫만에 하려니 sin() 함수가 radian 값을 받는것도 깜박잊고 꽤나 헤매게 만드네..

   

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01	#include "GL/gl.h"

02	#include "GL/glu.h"

03	#include "GL/glut.h"

04	#include "math.h"

05

06	static int year = 0, day = 0;

07

08	void display(void)

09

{

10

int temp;

11	glClear(GL_COLOR_BUFFER_BIT);

12	glColor3f(1.0, 1.0, 1.0);

13

14	glPushMatrix();

15	glBegin(GL_POINT);

16	for(temp = 0; temp < 360; temp++)

17

{

18	glVertex3f(0.01*temp - 2,sin(3.1415927/180*temp),0);

19

}

20

glEnd();

21	glPopMatrix();

22

23	glutSwapBuffers();

24

}

25

26	void reshape(int w, int h)

27

{

28	glViewport(0, 0, (GLsizei) w, (GLsizei) h);

29	glMatrixMode(GL_PROJECTION);

30	glLoadIdentity();

31	gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);

32

33	glMatrixMode(GL_MODELVIEW); //GL_PROJECTION

34	glLoadIdentity();

35	gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);

36

}

37

38	void keyboard(unsigned char key, int x, int y)

39

{

40	switch (key)

41

{

42

default:

43

break;

44

}

45

}

46

47	int main(int argc, char** argv)

48

{

49	glutInit(&argc, argv);

50	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);

51	glutInitWindowSize(500, 500);

52	glutInitWindowPosition(100, 100);

53	glutCreateWindow(argv[0]);

54

55	glClearColor(0.0, 0.0, 0.0, 0.0);

56	glShadeModel(GL_FLAT); //GL_SMOOTH

57

58	glutDisplayFunc(display);

59	glutReshapeFunc(reshape);

60	glutKeyboardFunc(keyboard);

61	glutMainLoop();

62

return 0;

63

}