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Computer Graphics Assignment – Mass Spring Systems
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Negative sign disappears on energy eqn? #1

Open msnhao opened 4 years ago

msnhao commented 4 years ago

image

How does the negative sign disappear here? There isn't a negative sign in the substitution. image image

abhimadan commented 4 years ago

Thanks for pointing this out; the negative sign in the scalar form of the energy is incorrect (as well as a few other typos). If you get the gist of the derivations, then you should be fine to use the energy formulation on the line after the one you screenshotted (which rearranges the terms into a quadratic form and a dot product), as that one is correct and matches the one used in the paper. We will fix the typos soon.