//----------------------------------------------------------
void ofEllipse(float x, float y, float width, float height){
if (!bSetupCircle) setupCircle();
// use smoothness, if requested:
if (bSmoothHinted && drawMode == OF_OUTLINE) startSmoothing();
// draw:
glPushMatrix();
glTranslatef(x, y, 0);
glScalef(width, height, 1);
glBegin( (drawMode == OF_FILLED) ? GL_POLYGON : GL_LINE_LOOP);
glCallList(precachedCircle);
glEnd();
glPopMatrix();
// back to normal, if smoothness is on
if (bSmoothHinted && drawMode == OF_OUTLINE) endSmoothing();
}
void ofCircleSlice(float x,float y, float radius, float lowAngle, float highAngle, bool closed, bool radians) {
if (!bSetupCircle) setupCircle();
// use smoothness, if requested:
if (bSmoothHinted && drawMode == OF_OUTLINE) startSmoothing();
bool angleWrap = (lowAngle > highAngle); // are we doing the 0/360 wrap?
if(!radians) {
lowAngle = ofDegToRad(lowAngle);
highAngle = ofDegToRad(highAngle);
}
int res = numCirclePts;
float angle = lowAngle;
float angleRange = ((!angleWrap)?(highAngle - lowAngle):(M_TWO_PI - lowAngle + highAngle));
float angleAdder = angleRange / (float)res;
int k = 0;
for (int i = 0; i < numCirclePts; i++) {
circlePtsScaled[k] = x + cos(angle) * radius;
circlePtsScaled[k+1] = y - sin(angle) * radius;
angle += angleAdder;
k+=2;
}
// we draw the circle points ourself (vs. glDrawArrays) because it allows us to draw the center point, and have the triangles fan around it
k = 0;
glBegin((drawMode == OF_FILLED) ? GL_TRIANGLE_FAN : (closed?GL_LINE_LOOP:GL_LINE_STRIP));
glVertex2f(x, y); // center vertex
// now all the points around the circumference
for (int i = 0; i < numCirclePts; i++) {
glVertex2f(circlePtsScaled[k], circlePtsScaled[k+1]);
k+=2;
}
glEnd();
// back to normal, if smoothness is on
if (bSmoothHinted && drawMode == OF_OUTLINE) endSmoothing();
};
