| --- Log opened Fri Jun 12 00:00:03 2020 |
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| 00:09 | <~Vornicus> | 1. in up right, as unit vectors, given yaw and pitch. 2. scale up and right according to zoom value and aspect ratio. 3. scale in according to the top and bottom of the world bounding box, so that (world_from_camera * (0,0,0) - world_from_camera * (0,0,1)).z = the height of the world bounding box |
| 00:15 | <~Vornicus> | 4. finally, place the camera, such that camera_from_world * (look_point - up/2 - right/2) = (0,0,something) |
| 00:18 | | Kindamoody is now known as Kindamoody[zZz] |
| 00:19 | <~Vornicus> | 4a. oh and camera.z itself is world_height |
| 00:23 | <~Vornicus> | 3 I guess is to say that in.z = world_height |
| 00:27 | <~Vornicus> | wait that's wrong |
| 00:27 | <~Vornicus> | (world_from_camera * (0,0,0) - world_from_camera * (0,1,1)).z |
| 00:41 | <~Vornicus> | unit_right = (-cos(yaw), sin(yaw), 0); unit_up = (sin(pitch) * sin(yaw), sin(pitch) * cos(yaw), cos(pitch)); unit_in = (cos(pitch) * sin(yaw), sin(pitch) * cos(yaw), -sin(pitch)). up = unit_up * zoom; right = unit_right * zoom * aspect; in = unit_in * (up.z + world_height) / unit_in.z. |
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| 01:20 | <~Vornicus> | and finally: focus_plane_corner = look_at - up/2 - right/2; camera_location = focus_plane_corner + (unit_in * (focus_plane_corner.z - world_height) / unit_in.z) |
| 01:20 | <~Vornicus> | way less awful when I'm not trying to one-shot it. |
| 01:52 | | * Vornicus makes some minor corrections because of typos and sign errors, throws some numbers through the resulting matrix and its inverse, is satisfied with the results. |
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| 08:48 | <~Vorntastic> | --there's a reason the thing I looked at trying to figure out camera used -1 and 1 as the bounding box for the camera frustum: so in perspective cameras, the forward vector is the actual direction that the camera points at, so the object looked at is at the center and not the corner. Okay, have to adjust for that because otherwise spluh |
| 08:49 | <&McMartin> | At least it's a pretty good reason |
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| 09:39 | | Kindamoody[zZz] is now known as Kindamoody |
| 09:45 | <~Vorntastic> | Yeah it occurred to me as I was going to sleep and I felt that it was obvious that this was the point |
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| 11:44 | <&Reiver> | Okay, the Itch Bundle is just about worth it just for the Hex Kit. Not something I expected to admit. |
| 11:44 | <&Reiver> | I suspect Vorn could have fun with it, along with anyone wanting to do an Explore-o-RPG. |
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| 11:53 | <~Vorntastic> | I shall examine |
| 12:00 | <&Reiver> | It's nothing /fancy/ |
| 12:01 | <&Reiver> | But 'have a hexgrid map generator with graphical layers and ability to automatically randomise tiles within a set (eg, 'forest trees')' seems... valuable |
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| 14:06 | < Kizor> | I'm trying to learn Eclipse. I'm failing the Hello World tutorial. |
| 14:10 | < Kizor> | Can someone please tell me why I can create a class, write a bunch of song lyrics from the Finnish translation of The Sound Of Music, save it, run it, and get not a single error, just a polite indication that the application has terminated? https://i.imgur.com/pJaNwr5.png |
| 14:14 | < Kizor> | Whereas when I make another class, identical - to my amateur eyes - save for the name, copy-paste in the same code, and run that, /then/ I get the proper errors and not only that, the GUI adds in the red xes that indicate errors in the workspace? https://i.imgur.com/Nx6DWIK.png |
| 14:15 | < Kizor> | This is going to be something pathetically easy, something so basic that the tutorial writer never thought of having to mention that, and I'll have humiliated myself. It pisses me off. |
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| 14:32 | <~Vorntastic> | This is... A thing with java |
| 14:32 | <~Vorntastic> | The only class in a file that counts is the one that's named the same as the file |
| 14:33 | <~Vorntastic> | Or something; that's how it was back in the day, though I never actually pushed that wall |
| 14:34 | < Kizor> | I tried changing the class names to match the file names. No luck. |
| 14:35 | < Kizor> | However, when I tried to close the offending class, Eclipse informed me of an identical one being open elsewhere, though heck if I know where. |
| 14:36 | < Kizor> | I shut down everything and reopened the offending class, and now it works perfectly. |
| 14:36 | < Kizor> | It's just |
| 14:37 | < Kizor> | How do people know all this? How do you cram all the information about program minutiae and language quirks and teeny-tiny little details that'll bring the whole thing down into your head, and keep it there for long enough to do something useful? |
| 14:45 | < Kizor> | There's a tab called "Declaration" in the bottom of those screenshots. I can't get it to show up again but I think that's where there was a different copy of the same class with no statements in it. What even is that, and how do I avoid in the future? |
| 14:46 | < Kizor> | This has gone from a legitimate technical question to dwelling in self-pity, so I'll go eat. However, I'll note that we can't blame people for not wanting to learn computers if this is what computers make them feel all the time. |
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| 15:08 | <~Vornicus> | ok I was poking at that but didn't finish let's see here. |
| 15:14 | <~Vornicus> | Okay! Matrix managed. |
| 15:38 | < catalyst> | nyaa |
| 15:38 | < catalyst> | my library had 101 downloads yesterday :o |
| 15:39 | < catalyst> | Kizor: learning what is relevant and programming to reduce the relevant set of things in any given context is a big part of being an effective coder |
| 15:40 | < catalyst> | some of it is practise with syntax to make it subconscious |
| 15:40 | < catalyst> | some of it is figuring out how to subdivide problems into smaller problems and solve those, then solve the bigger problems in terms of those |
| 15:41 | < catalyst> | in some sense the main through skill in programming as an engineering discipline is logistical management of data |
| 15:42 | | * Vornicus hatalyst |
| 15:59 | | * catalyst behatted |
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| --- Log closed Sat Jun 13 00:00:04 2020 |