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Newcomers AppGameKit Corner / Making something go boom

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blink0k
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Posted: 7th Sep 2018 03:54 Edited at: 7th Sep 2018 04:57
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Is there a 3D equivalent to CreatePhysicsForce()? How would i go about blowing something up in 3D?


Unless there's a function for force i think i need to do it through linear velocity
which means i think i need to come up with a vector based on the center of the object (cx, cy, cz) and the center of the piece(px, py, pz). Any ideas?

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Rick Nasher
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Posted: 17th Sep 2018 20:08
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(back from outa space)

In Blitz3d I had a nice routing for shattering glas windows(would have to convert).

I vaguely remember fubarpk doing something like this. Perhaps this is of help:
https://forum.thegamecreators.com/thread/222027#msg2624062
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Phaelax
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Posted: 17th Sep 2018 20:24
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I did something kinda like this in DBP a long time ago. I used memblocks to just break the object down into individual triangles then just had them fall off. Basically, the object just collapsed into pieces.
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JLMoondog
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Posted: 18th Sep 2018 18:04
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Quote: "I did something kinda like this in DBP a long time ago. I used memblocks to just break the object down into individual triangles then just had them fall off. Basically, the object just collapsed into pieces."


You still have da codez? This maybe a solution to an effect I've been trying to create in my current project and would be fun to convert to AGK.
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Phaelax
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Posted: 18th Sep 2018 19:46
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I'll have to dig for it. I also vaguely remember someone doing this with a teapot model, I might his code as well.

I'm not familiar with AGK's 3D commands or memblock structure (i assume its pretty similar). But essentially, loop through all the verts in the memblock as created from the model in question. Then create triangles and position them accordingly, essentially reconstructing the object itself. Then, when you want to explode the object, hide the original and display the collection of triangles, moving them however you want for your intended effect. Only thing I'm pretty sure isn't accounted for is texturing. That could get tricky but doable with UV manipulation. But if you explode it fast enough enough, spinning the triangles through the air I don't think anyone would really notice if a texture was missing on the pieces.
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Phaelax
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Posted: 19th Sep 2018 13:47
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Might want to read through this
https://forum.thegamecreators.com/thread/173904
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blink0k
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Posted: 19th Sep 2018 21:34 Edited at: 19th Sep 2018 21:34
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This is what i ended up with. I made separate models for all the bits. (I thought separating all the polys might not look right, and it was too much work!)
The interesting thing was i didn't need to apply any forces. I'm not sure why but i think it's because their physics shapes were overlapping and that naturally pushed them away from each other.

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puzzler2018
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Posted: 19th Sep 2018 22:03 Edited at: 19th Sep 2018 22:05
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i madesomething boom in my memblocks thread - maybe you missed it

work with me, ill sort your query out
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blink0k
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Posted: 19th Sep 2018 22:41
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No worries puzzler. I just saw that. Nice work
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