Any surface you created with Autodesk Inventor's fillet tool has G1 continuity built in. You've probably created G1 surfaces without even knowing it. In surfacing this is the second order of continuity which we call 'G1' = Continuity + Tangency. The Batmobile is travelling along a set vector, then it turns through a fixed point before heading off in a new direction.
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In Tim Burton's 1989 movie “Batman,” Michael Keaton, playing the part of Batman, fires a side-mounted grappling hook from the Batmobile, snagging a nearby lamp post and allowing the Batmobile to execute an almost perfect 90 degree turn. Like the bikes in “Tron” (The original “Tron”… again, feeling my age) the two surfaces meet and change direction very sharply, forming a distinct edge.įact: Did you know that the CGI sequences on the original “Tron” movie were rendered on a computer that had only 2MB RAM and 330MB storage? The scenes were rendered one pixel height line across the image at a time-no one saw the final images until they were re-composited back onto film! G1 = Continuity + Tangencyįigure 3: Images from 'Internet Movie Car Database' This boundary can be pretty sharp (if you like). They meet along a common edge forming a 'water tight' boundary. 'G0' then is the first order of surface continuity, and it simply means that the two surfaces touch. As I try and imagine this in my mind's eye, I can't help but think of the bifurcated Herbie's classically styled lines-so similar, but sadly not connected. Two surfaces that don't touch at all have no continuity. The memorable scene is when Herbie breaks in half during a race, and ends up winning first and third place! One personal favourite were the “Herbie” films, in which a plucky VW Beetle comes to life with hilarious results.
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I always fondly remember being taken to our local library as a kid to see the movies on a big screen (this was before cable TV and the Internet, and describing it makes me feel old!) The more alike the surfaces (the more conditions that match across the pair of inputs) the more smoothly the adjoining surfaces flow. We can add a suffix to our G to describe how many like characteristics each surface has. We describe the 'smoothness' of a junction, where one surface meets another, using the term 'G' (G stands for 'Geometry'). Usually surface modelling is used to create flowing, organic shapes, so the junctions between surfaces are terribly important. Surface modelling is the art of building complex geometrical features, one surface at a time. With a bit of surfacing theory, you too can relish meeting the challenge with Autodesk Inventor®! Hard Surface modelling is possibly the most challenging discipline within 3D CAD, and the most rewarding, once you've gotten the way of it. Click Isometric from lower left view menu.Back June 30th, 2014 An Introduction to Surface Continuity To engrave the text, click Features, click Extruded Cut, under Direction 1 Blind, set D1 to 0.01in and. Click to part face to relocate text to center. Click Font… set height to Points 10 OK.ġ0. Input text in text box, to change font type and size uncheck use document font.
Click Extruded Boss/Base and set D1 to 0.5in and. Build feature from sketch, click Features and activate features menu. Press keyboard ESC to end smart dimension.ħ. Click Smart Dimension, and start dimensioning pick vertical line and set to 2.00in, pick horizontal line and set to 2.00in. Black line is line that fully defined and blue line is under defined.Ħ. Note: There is two type line generated by your sketching, the one with black line and blue line. Press keyboard ESC to end rectangle sketch. Pick Origin point as starting point, drag to right hand side no need to be exact the size will define in later step. As you can see on upper right corner sketch icon appear indicate that you’re on sketch mode. Click Sketch in Command Manager, click Rectangle. Select Top Plane, from lower left menu select Normal To.Ĥ. Select Units, under Unit System select IPS (inch, pound, second) OK.
Click Option (Tools>Option…), select Document Properties tab.
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