OpenGL - Drawing a moon Crescent

[rahman86]

HI all.

I have a problem regarding how to drawing a crescent using opengl. i recently learn this opengl so i dont have much idea how to do it, here is what i have so far.

void drawCrescentTriStrip(float step,float scale,float fullness) {
    glBegin(GL_TRIANGLE_STRIP);
    glColor3f(1.0, 1.0, 0.0);
    // glVertex2f(0.9f,scale);
    const float pi = 3.1415926535897932384626433832795;
    float angle=step;
    while (angle<pi) {
        float sinAngle=sinf(angle);
        float cosAngle=cosf(angle);
        glVertex2f(scale*sinAngle,scale*cosAngle);
        glVertex2f(-fullness*scale*sinAngle,scale*cosAngle);
        angle+=step;
    }
    glVertex2f(0.9f,-scale);
    glEnd();
}

i dont have strong math, so i hope i can get help as much as possible for me to learn about opengl.

thanks.