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Re: Building that make "holes" in terrain
For Halo Wars, when a building was created it would flatten the terrain around it then an alpha decal was projected downward in the shape of the building (if needed.) This created a whole in the terrain. Any terrain visible in the hole was part of the building model. -
Re: Building that make "holes" in terrain
UDK's terrain is seamless, and tessalatable, but you can place holes in it. The hard part would be to flatten the terrain surrounding the hole to avoid any seams there. -
Re: Building that make "holes" in terrain
Dude, they answered your question already, Anuxinamoon, went even into details about it. Is that not the effect your looking for? The video is showing the exact same effect, everything is interpolating between the vertices of the grid, and the raising and lowering of the ground is a sub-form of tessellation, which even old… -
Building that make "holes" in terrain
This is more a curiosity than a need to reproduce In many strategy games 2D/3D there are buildings with different elevations + and - when it is below the ground, the building fits perfectly "cutting" the terrain. how is it done? alpha test? Anno 2070 example -
Re: Building that make "holes" in terrain
cut a hole in the terrian than just use a mesh for hte dug out bit. -
Re: Building that make "holes" in terrain
I take it the grid resolution changes to be more dense when something like a building carves out the terrain then? For terrain like that above, I wouldn't be surprised if there's only 6 to 10 tiles on there. But for that hole to happen, 30 tiles or so inside of that particular tile? Surely the rest of the tiles aren't that… -
Re: Building that make "holes" in terrain
One can render a box slightly hovering over the terrain "invisibly" in a way that it masks pixels that intersect the box in the stencil buffer (similar to stencil shadow algorithm). Then you could clear the depth value of all masked pixels, and render your actual geometry. You could also project a texture with those… -
Re: Building that make "holes" in terrain
In Anno we can camera rotate/move/tilt freely to see all angles. Buildings with "terrain subtraction" are very detailed and seem to cut and fit perfectly on the ground, with animations and in some cases water inside it. The texture splatting/blend remains even with the building placed on middle of a blend, the texture does… -
Re: Building that make "holes" in terrain
I have the artbook for both 1404 and 2070 games and it looks as if they just model each building on a plane that has a alpha on it that blends with the underlying surface. -
Re: Building that make "holes" in terrain
I could be wrong, but I swear for some editors similar to the starcraft editor it has a wireframe view and it seamed the decales and textures were all set up on a grid that matched the wireframe.
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