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Resizing shapes

Started by garusher Feb 25, 2009 at 7:24 AM 3 replies 600+ views

Original Post

Feb 25, 2009 at 7:24 AM

Hi, Well i've had a brain wave. couldn't i do the following the increase height of a shape. 1) find the lowest [base] horizontal plane 2) change the vertices for everything thats above the horizontal plane Thanks Gary Rusher

Evil Steve

Feb 25, 2009 at 7:39 AM

Yes...

Why?

garusher

Feb 25, 2009 at 8:06 AM

Hi,

Does anyone have any Direct3d math to achieve this?

Thanks
Gary Rusher

Winegums

Feb 25, 2009 at 10:33 AM

Nothing direct-3d specific, but I think the following would generally work.

//Create a D3DVECTOR3 equal to element 0 of the vertex buffer.//For each vertex that comprises the shape    //If it's y-position is lower than the lowest value we've currently got    //store the value of that element//For each vertex that comprises the shape     //If the points y-value is NOT the same as the stored vector3              //Increase height

Nyarlath

Feb 27, 2009 at 4:31 AM

Quote:
Original post by Winegums
              //Increase height

For a linear stretch:

new_height = (old_height - min_height) * factor + min_height

If "factor" is greater than one the height of the shape will be increased.

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