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How to move a 3dobject in 3dsean

 
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How to move a 3dobject in 3dsean
debjit625
post 15 Sep, 2008 - 07:42 AM
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Hi i am having a problem in rotating and moving a 3d mesh in worldspace
for example i have a mesh that i am moving forward in z direction then i rotate it and now it face to x direction but now when i move it forward it moves to z direction with facing x direction ....i know i am not very clear but if someone understand please help you can explain it in C# or C++
as you like and also i am programing this using DirectXSDK


Please help...Help...
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Tom9729
post 15 Sep, 2008 - 09:21 AM
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Try calculating the mesh's rotation/position before doing a transformation.
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debjit625
post 15 Sep, 2008 - 10:33 AM
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I think i am not clear with my question anyway thanks for your reply
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WolfCoder
post 15 Sep, 2008 - 10:45 AM
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It's linear algebra you seem to be doing. The order in which you apply the transformation matrices is important.

Here's an example, might not be the best but it works:

First an object must be placed at the origin. Then, the object must be scaled if your objects change their size. Then, the object must be rotated so that it is oriented to how it should look in the world. Lastly, it must be translated to it's current position in world space.

Now you have the world mapped out with it's center at the origin. You must now rotate the world to match the camera's angle. Try changing the order of translating and rotating and even excluding or including points in the transformation to view their effect.
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Tom9729
post 15 Sep, 2008 - 11:45 AM
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QUOTE(debjit625 @ 15 Sep, 2008 - 02:33 PM) *

I think i am not clear with my question anyway thanks for your reply

What math courses have you taken?

They pretty much cover transformations in Geometry, albeit in 2D [but adding a third dimension is cake].
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debjit625
post 22 Sep, 2008 - 10:38 AM
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Thanks guys
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debjit625
post 23 Sep, 2008 - 12:00 AM
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Thanks everybody ,i found my mistakes in my math and its solved
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