I am a newbie of OpenGL, here is my code desired to draw a sine wave in [0,2*pi), but there is only a line between (0,0)and(0,1), any advice is appreciated!
here is my code
//************************************************//
#include <glut.h>
#define PI 3.14159265 // _USE_MATH_DEFINES
#include <math.h>
#include <iostream>
#define SIZE 2000
void drawline(float x1, float y1, float x2, float y2);
void sinewave();
int main(int argc, char ** argv)
{ glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH);
glutInitWindowSize(400,400);
glutInitWindowPosition(200,200);
glutCreateWindow(" sinusoidal wave ");
glutDisplayFunc(sinewave);
glutMainLoop();
return 0;
}
void sinewave()
{
float x1, x2, y1, y2;
for (int i=0;i<SIZE;i++)
{
x1=i/SIZE;x2=(i+1)/SIZE;
y1=sin(x12PI);
y2=sin(x22PI);
drawline(x1,y1,x2,y2);
glutSwapBuffers();
}
}
void drawline(float x1, float y1, float x2, float y2)
{
glBegin(GL_LINE_STRIP); // LINE_STRIP | POINTS
glColor3f(1.0,0,0);
glVertex2f(x1,y1);
glVertex2f(x2,y2);
glEnd();
}