No per-vertex colours at all? Well that sucks, I think that makes my rendering impossible, since I need to calculate the lighting and tinting myself and that's all per-vertex.
Is there no way to fake this?
Is there no way to fake this?
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#2
Support / Ortho Rendering part 2
September 29, 2011, 06:30:27 PM
A resurrection/continuation of http://www.jpct.net/forum2/index.php/topic,1789.msg13178.html#msg13178
Lots of whining users means I'm looking into this (again), this time I'm going to see how much I can fake it by using a regular perspective camera with a tight fov. Questions:
1. I can't figure out how to set the near/far planes on the Camera object. How do I do this? Currently my geometry is being lost behind the far plane.
2. What's a suitable 'small' fov value to try and produce a fake-ortho view? I guess there's a tradeoff between depth buffer precision and minimising the perspective shift. Just how accurate is the depth buffer in software mode?
3. Unrelated, but how do I set per-vertex colours for geometry? None of the Object3D.addTriangle take a vertex colour. Do I have to use another method?
Thanks.
Lots of whining users means I'm looking into this (again), this time I'm going to see how much I can fake it by using a regular perspective camera with a tight fov. Questions:
1. I can't figure out how to set the near/far planes on the Camera object. How do I do this? Currently my geometry is being lost behind the far plane.
2. What's a suitable 'small' fov value to try and produce a fake-ortho view? I guess there's a tradeoff between depth buffer precision and minimising the perspective shift. Just how accurate is the depth buffer in software mode?
3. Unrelated, but how do I set per-vertex colours for geometry? None of the Object3D.addTriangle take a vertex colour. Do I have to use another method?
Thanks.
#3
Support / Re: Ortho projection and other newbie questions
November 14, 2010, 03:08:14 PM
The idea is to write a minecraft map renderer (along the lines of Cartographer and the like), and output tiled images which would then be fed into google maps or OpenLayers to get a nice high-res, explorable map.
Similar to the second example, it'd be for an offline render on a headless server (which may or may not have a proper graphics card, hence wanting a software renderer). So speed isn't an issue, but I think without a proper ortho view transform the map tiles aren't going to join up correctly.
Since I don't care about speed, is there some way to hack it? The Camera seems to basically just be a matrix, can I construct an ortho matrix manually and force the camera to use that somehow? Obviously things like Camera.lookAt would cease to work, but it'd be a heck of a lot easier than writing my own software renderer.
Similar to the second example, it'd be for an offline render on a headless server (which may or may not have a proper graphics card, hence wanting a software renderer). So speed isn't an issue, but I think without a proper ortho view transform the map tiles aren't going to join up correctly.
Since I don't care about speed, is there some way to hack it? The Camera seems to basically just be a matrix, can I construct an ortho matrix manually and force the camera to use that somehow? Obviously things like Camera.lookAt would cease to work, but it'd be a heck of a lot easier than writing my own software renderer.
#4
Support / Re: Ortho projection and other newbie questions
November 14, 2010, 12:20:13 AM
Wow, a 3d engine without ortho support. 
Is there any chance of adding it? Otherwise it's completely unsuitable for my project and I'll have to look elsewhere (which is a shame, as none of the other 3d engines have software renderers as far as I know).
Is there any chance of adding it? Otherwise it's completely unsuitable for my project and I'll have to look elsewhere (which is a shame, as none of the other 3d engines have software renderers as far as I know).
#5
Support / Ortho projection and other newbie questions
November 13, 2010, 10:03:06 PM
Hello, I thought i'd give this a try for my current project, but seem to have found a few snags:
1. Is there a way to set an orthographic camera projection? There doesn't seem to be a way to specify the projection that the camera uses, other than setting the FOV. Perspective seems to be implied. How do I set it to ortho?
2. Primatives.creatBox returns a box rotated by 45 degrees, wtf? What's up with that?
3. Camera.setLookAt seems to not be remembered if I call Camera.setPosition(). I have to re-specify the look at point whenever changing the position. Is this normal? Is there a way around this?
4. The hello world code uses direct calls to LWJGL's Display.isCloseRequested, and there doesn't seem to be any window management. Am I missing something? How do I control the window settings (in both GL and software mode).
Thanks.
1. Is there a way to set an orthographic camera projection? There doesn't seem to be a way to specify the projection that the camera uses, other than setting the FOV. Perspective seems to be implied. How do I set it to ortho?
2. Primatives.creatBox returns a box rotated by 45 degrees, wtf? What's up with that?
3. Camera.setLookAt seems to not be remembered if I call Camera.setPosition(). I have to re-specify the look at point whenever changing the position. Is this normal? Is there a way around this?
4. The hello world code uses direct calls to LWJGL's Display.isCloseRequested, and there doesn't seem to be any window management. Am I missing something? How do I control the window settings (in both GL and software mode).
Thanks.
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