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drawing a rotated circle

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i want to draw a circle, with radius r it's center (xyz) and it is laying on a plane with normal (nx, ny, nz), i've got it managed somehow, but sometimes it totally get screwed up: gl.glBegin(GL.GL_LINE_LOOP); for( int i = 0; i < NUM_LINES; i++){ float angle = (float) Math.toRadians(i * 360 /NUM_LINES); verts[i] = Vector3.RotatePointAroundVector( radius, 0, 0, direction.getX(), direction.getY(), direction.getZ(), angle); verts[i].add(center); gl.glVertex3fv(verts[i].data, 0); } gl.glEnd(); here is the code what am i doing wrong Paul

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