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Topics - 3-S-E

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Support / Y-Axis - Up-Vector - Confusion
« on: October 02, 2011, 04:56:01 pm »
Hi folks,

I have a big problem understanding the decision of making the pos. y-axis pointing downwards. This makes the whole thing totally counterintuitive for me even if this is a correct right-hand system. I've never used a 3D-creating app that turns the Y-axis this way and I think this makes the jpct engine unnecessary complicated.


I used the "Box-Primitive" code snipped from the wiki and applied a texture to it. The texture is placed upside-down. A texture applied to the bottom-part of the Box appears on the top of the box. So the "lower"-points are the upper ones, or what? Okay, so I tried to rotate my cam around the direction-axis by setting the up-vector from (0.0f, -1.0f, 0.0f) to (0.0f, +1.0f, 0.0f), but nothing happend.

I'm really confused... Can someone please give me a hint, what I don't understand at this topic?


Edit: Setting the Y-axis pointing downwards is like climbing a 2 miles high mountain by digging a 2 miles deep hole!

Support / Can't get the shading right - 3ds / obj
« on: July 04, 2011, 11:38:21 am »
Hi all,

the day before I was trying to import a 3ds and an obj file into my jPCT-AE based app, but couldn't figure out why the shading of the faces went so damn wrong.

This is how it should be (flat shaded with diffuse-colors on dedicated polys):

And this is a capture from my SGS2 device how it becomes:

I've tried to export my (triangle-only - no quads, no fancy stuff) model to a 3ds-file with 3ds max 2012 and Blender 2.58 (btw.: the worst and non-intuitive modeling-tool ever! Sorry, but it irritates me every time again I'm trying to give it a chance). Then I've tried to export it to obj with 3ds max and maya 2012 - same result on import in jPCT.

I've attached both, the 3ds- and obj-files.

Please give me a hint, what I'm doing wrong?!


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