void circle(float x, float y, float r, uint32_t color)
{
olPushMatrix();
olPushColor();
olMultColor(color);
olTranslate(x, y);
olRotate((x+y)*123);
/*olBegin(OL_BEZIERSTRIP);
olVertex(0, r, color);
int i;
for (i=0; i<2; i++) {
olVertex(CP*r, r, C_WHITE);
olVertex(r, CP*r, C_WHITE);
olVertex(r, 0, C_WHITE);
olVertex(r, -CP*r, C_WHITE);
olVertex(CP*r, -r, C_WHITE);
olVertex(0, -r, C_WHITE);
olVertex(-CP*r, -r, C_WHITE);
olVertex(-r, -CP*r, C_WHITE);
olVertex(-r, 0, C_WHITE);
olVertex(-r, CP*r, C_WHITE);
olVertex(-CP*r, r, C_WHITE);
olVertex(0, r, C_WHITE);
}*/
/* olVertex(0, r, color);
olVertex(0, r, color);
olVertex(r*0.1, r, color);
olVertex(r*0.1, r, color);*/
float circum = 2 * M_PI * r;
int segments = circum / (1/30.0);
if (segments < 50)
segments = 50;
int i;
olBegin(OL_POINTS);
olVertex(r, 0);
for (i=0; i<=(2*segments+10); i++) {
float w = i * M_PI * 2.0 / segments;
uint32_t c = C_WHITE;
if (i > 2*segments)
c = C_GREY((10-(i-segments)) * 28);
else if (i < 3)
c = C_GREY(i * 85);
olVertex(r*cosf(w), r*sinf(w));
}
olEnd();
olPopColor();
olPopMatrix();
}
static VALUE
ol_rotate(VALUE self, VALUE v)
{
olRotate(NUM2DBL(v));
return Qnil;
}
