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BryceTalk Q n A with Engineers
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BryceTalk Q & A with Engineers, July 15, 1999
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FSUGary: like my rendered scene... if you want I can reproduce the results I am getting and grab a screenshot? and upload MetaBrian: No, I think I get what you are saying... CrypticGrafix: ? FSUGary: ok george: I've had a similar problem btw...white when opening. MetaBrian: Hopefully, the update will fix it... FSUGary: hope so :) thanks again AuntiAlias: gdmsynth, you are on! gdmsynth: Why do I get motion path overshoots and unwanted reverse directions on my animations when I mix short and long distances between different keyframes? creativejuice: b4 update? gdmsynth: Example: When I create an animation with a straight linear path that moves an object slowly and short the first second then, quickly and far the second second, slowly and short the third, and then a short and slow reverse direction the fourth I end up with AuntiAlias: queue: Guycreamo, DonaldSG, JeffP, creativejuice, george, Clay, renderin', AuntiAlias, Cryptic Graphix ... if you have a question, please type "?" gdmsynth: The object going bacwards at the beginning and overshooting the end point. Why? ahole: OK, i got this one. ahole: The problem goes kind of deep into the math of the curves gdmsynth: Yes, I understand about the bezier curves and how to adjust the handles but sometimes its difficult to place a motion path still. Say an object swoops down from the sky to the water line. Its difficult to keep it from going underwater too. ahole: To make the path smooth that's what has to happen. gdmsynth: Any suggestions to work around this? ahole: I ussualy recomend to try to place the control points little more evenly. Dr. Mojo: Splines (the math used to do those paths) are a bitch to control, in that way... Just part of the mathematical territory... gdmsynth: Such as every second or so? DonaldSGriffin: Aunti, did my turn pass while I was kicked off? ahole: That's nicely put, Thanks Ken :) AuntiAlias: no, you are still in the queue, DSG Dr. Mojo: Sometimes placing multiple control pts. in the same place will prevent this. gdmsynth: Does it help to keep them evenly spaced? What do you mean multipe control points? ahole: It it not matther of time placement as much as space placement.. Dr. Mojo: Yes, that can help as well. Depends on the exact math you're (we're) using. ahole: Also try to control the path with the tanget controls. gdmsynth: But the spacing and time do seem related. Dr. Mojo: The points you ues to specify the path. gdmsynth: Tangent controls can help. ahole: They do, since distance is linear function of velocity and time Dr. Mojo: If you put several in the same place, it constrains the equations used. gdmsynth: I see so using many points to define the curve? AuntiAlias: There've been a couple of discussions about how to make animations two distinct processes. Make the trajectories first to get the place (i.e., draw the spline lines) and then convert all that to an object path and work with the time there... Calyxa: isn't it better to have your path and a keyframe at the start, a keyframe at the end and use the timecurve to control the rate? AuntiAlias: Some past chat logs that have covered animation: Back in March with Robert Bailey and Rodney L'Ongnion... gdmsynth: The actual path I am creating is already linked to an object moving on a trajectory path and I need to constantly update the position of the path so creating a trajectory path for this second object isn't desirable at this point. Dr. Mojo: Use many points in exactly the same place--where you want it to stop. ahole: You can make a good using of the timecurves, but i think that in this case (overshooting splines) it's not gonna help AuntiAlias: also, more recently a tuesday Camera chat had some trajectory-to-path technique discussions.. (this is just for general point of reference on the matter; as is prolly the case here your mileage may vary) ahole: using = use gdmsynth: So it sounds like multiple points is the best solution in my case. Dr. Mojo: Try it. It may or may not work. gdmsynth: Thanks. Done. AuntiAlias: Guycreamo! You are on! ahole: creamo what's going on here? :) AuntiAlias: hmmm.... think we lost guycreamo... Dr. Mojo: He's doing a Sleepy Mo number... ahole: :) Number huh.... :) AuntiAlias: saw name leave room and re=enter and maybe leave again... Dr. Mojo: 666 AuntiAlias: DonaldSG MetaBrian: So that's what you call it these days... DonaldSGriffin: A way to turn a complex boolean into something recognizable in wire frame mode. Coming? How? When? Maybe by getting rid of unused portions? Turning it into a model? Calyxa: just did a find person on guycreamo and came up empty... george: ? <another question for the que in addition to my next one> ahole: Some plans are on the horizon, but i don't think that there are really for 5 AuntiAlias: queue: JeffP, creativejuice, george, Clay, renderin', AuntiAlias, Cryptic Graphix, george (again!) ... if you have a question, please type "?" DonaldSGriffin: I thought to try exporting but couldn't ahole: Yeah, that's not gonna work for you... CrypticGrafix: whoa im a long ways off! hehehe Dr. Mojo: Booleans are done during ray tracing, so it's much harder to do them as wireframes. It may never happen, for that reason. DonaldSGriffin: bummer. They're neat. ahole: I love them too.... MetaBrian: I adore them... george: I seccond that neatness.... Dr. Mojo: Ah, well, who needs stinking wireframes? DonaldSGriffin: Okay I love them. (embarassed) renato!: Booleanphilia george: (related question ) Clark/CDS: mo....me Dr. Mojo: (Just kidding!) george: Will the Open Gl mode support booleans anytime soon? Dr. Mojo: Probably not, for the same reason. Dr. Mojo: Booleans are a ray tracing trick. george: oic ok AuntiAlias: JeffP... it's YOU! JeffP: Ken: what would be your list of things that have to happen to realize "immersive cyberspace"? Dr. Mojo: PLANETS, to start with. Then solar systems. Then galaxies. Then clusters of galaxies. ahole: Dude, start with you living room :) Dr. Mojo: Then... Artificial life? Whatever people put there will become the focus. george: lol DonaldSGriffin: (I'd be happy with a single realistic room. Hrrmph) Calyxa: ? Dr. Mojo: My living room is too messy to render in a reasonable amount of time. ahole: :)) george: So...this is, say, bryce 6 Dr Mojo ? : ) MetaBrian: Too many dust particles??? AuntiAlias: queue: creativejuice, george, Clay, renderin', AuntiAlias, Cryptic Graphix, george (again!), Calyxa ... if you have a question, please type "?" JeffP: How would I visit your living room? Dr. Mojo: Bryce 5 -- and BEYOND!!! Clay: LOL!! JeffP: :) Dr. Mojo: When I get it in Conoma. :-) ahole: Ussualy you knock on somebody's door CrypticGrafix: hahaha ahole: to go for visit. But that does not mean that they let you in CBXTX: ! You people are putting out new versions way faster than I can learn to use them! AuntiAlias: then they hand you grains of salt with which to take their statements.... : ) Clay: heheh renato!: you would take that with a grain of salt? Dr. Mojo: Did we forget to pass out the salt??? Clay: LOL!!! AuntiAlias: um.. Dr. Mojo: What can I say, I'm just a salty old dog... AuntiAlias: are we done with this question? Dr. Mojo: I think so.
>>>> Next up: The difference bewteen Maximize UI and Maximum recommended scene size |
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the individuals who stated them;
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