How to change bezier interpolation to linear in .mdl file?

[LazyCoder]

Hi, whenever I export anything with the dexport script for gmax, it always tries to use bezier interpolation in my animation. But I have a special case where I NEED it to be purely linear. (I'm trying to make an elevator shaft by having textured walls move past the viewer, but that doesn't work if they keep slowing down and speeding up again!)

 

[LazyCoder]

Ah! I figured it out!

In the last few lines of code, change this:

Translation 2 {
		Bezier,
		0: { 0.0, 0.0, 0.0 },
			InTan { 0.0, -0.0100711, 230400.0 },
			OutTan { 0.0, -2.09815e-006, 48.0 },
		960: { 0.0, -1.04907e-005, 240.0 },
			InTan { 0.0, -8.39259e-006, 192.0 },
			OutTan { 0.0, 0.0100606, -230160.0 },
	}

to this:

Translation 2 {
		Linear,
		0: { 0.0, 0.0, 0.0 },
		960: { 0.0, 0.0, 240.0 },
	}

 

[TDR]

why don't just use linear controllers in max? or you do and dex still converts them to bezier or something?

 

[LazyCoder]

Yea. No matter what interpol. you have it set to, dex always uses bezier, or for scale, something called hermit (or something like that).

 

[BlinkBoy]

Are you sure you are using lastest version of dex?

Anyways, you can make a bezier act as linear in specific keys by making the tangents linear. It's simple: Select your bone/object and open the curve editor/track view, then select the keys, and click the button "make tangents linear", the button has a line and one point at the end.