Reply to: Mathematical Problem

[Freaki Li Cuatre]

sorry looks like they have meddled.

The documentation is vague I suspect the Make version does import / export Google, its a powerful feature.

Yes, it looks like that functionality is available in Make.

In fact, the possibilities are much more than just superimposing a scaled pic of a chimney on a photo.

My understanding is that I can get an existing 3d representation of a chimney (model) from some online store, scale it to the right size and stick it in the right location on the area I've imported into Sketchup from Google Earth.

But it gets better than that. Because the google earth model has terrain, I should , in theory, be able to assess whether or not the chimney is visible from various locations on the map.

[Churchill]

heh heh.


i suppose we could attach the snot-rocket to an Saturn V, and see how long it takes them to clear the chimbley

Ftfy

[EternalOptimist]

Well, there's a joke about a vanishing point in there but it won't quite come to me.

heh heh.


i suppose we could attach the snot-rocket to an appollo, and see how long it takes them to clear the chimbley

[Zippy]

do we have to use a camera ?

whats wrong with sasgurus knob-length

Well, there's a joke about a vanishing point in there but it won't quite come to me.

[EternalOptimist]

do we have to use a camera ?

whats wrong with sasgurus knob-length

[Zippy]

It has to be an imaginary camera cos the chimbley doesn;t exist yet. Apart from that - winner!

[EternalOptimist]

get a lader and go up the chimbley.
turn the camera end over end to get the chimblie in camera units

measure the camera then do the calculation

[EternalOptimist]

put the camera next to the chimbley.
measure the length of the shadow

compare the chimblies shadow to the camera shadow, then calculate using the cameras height

[EternalOptimist]

A few of you may be on to something here - just build the chimney and take another picture. Job done.

And it might be quicker.

put your camera next to the chimbley. take a photo then measure the size of the camera.

calculate the chimbley in camera units

[Zippy]

A few of you may be on to something here - just build the chimney and take another picture. Job done.

And it might be quicker.

[EternalOptimist]

take your wonderful camera to the top. drop it off and time the descent.

at 32 feet per second/per second, it wont take long to determine the height

[greenlake]

How do I work out what size to make the chimney in my montage?

Just remember that your chimney is never quite as big as you think it is....

[alluvial]

This is why you don't ask code monkeys about anything non code monkeyish.

They haven't got a friggin clue outside their tiny realm of angle brackets and semicolons.

Here, you talking about me?

[DimPrawn]

This is why you don't ask code monkeys about anything non code monkeyish.

They haven't got a friggin clue outside their tiny realm of angle brackets and semicolons.

[alluvial]

Does the object have to be at the same distance or can I use any object if I know it's height regardless of its distance ?

If you use an object at the same distance as the chimney then it should scale the same. Otherwise you'll have to use one of the other formulae to work out the image size when it moves to the correct distance.
Btw, not an expert, just suggesting possible solutions.