Help with my graphical Render

sirchick

S
Hey Frontier i hope some one on your team knows the answer to my problem....


Given you guys have worked on isometric based games you probably have come across my problem as well at some time.

I recently rendered a isometric curved piece of track. Which i lined up perfectly in the modelling app (Blender) - yet, when it is placed on an isometric map it is misaligned for no apparent reason..

Screen shot explains better. On the left it has it lined to my made up grid then on the right it is imported to a 64by32 isometric grid. But it appears to be roughly 50% offset. I'm a little confused as to why this is occuring.....

Please help explain what the mistake is if possible.

The camera is orthographic at an angle of 60,0,45 degrees. The curve uses 4 by 4 grids so i set the render image to 256 by 128 pixels so it should surely line up ?

http://i42.tinypic.com/2rfdo5t.jpg <<< Screenshot

Hope you can help.
 
Last edited:

Michael Brookes

Game Director
Does the scale of the model match the units you are rendering to in game? Is the origin of the model being placed on the same place on the grid between the modelling program and in game?

Michael
 

sirchick

S
The render is 256px by 128px. So the grids automatically become 64px by 32px (as its 4 by 4 grid squares its basically image size divided by grid squares) because the camera angle is isometric.

I found the issue how ever. It was due to the placement of tiles! The engine uses bottom left corner for positioning tiles. Where as it should use a center point of the image then it lines up fine.

I was curious on a side note how RCT 1 & 2 did it - did the track use bottom left corner placement of isometric tiles or did it use middle position of the sprites to place on the grid?

It's unlikely the source will ever be available so was wondering if there was much info about placement of spirtes on the isometric grids in RCT1 & 2 that could aide me in my game design.
 
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