Perspective and proportion

# Thread: Perspective and proportion

1. Registered User Level 6 Gladiator: Provocator
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## Perspective and proportion

Hello, I have a question about perspective (and proportion too). I try to explain it the most i can.

Well, I have this picture. I have the horizont line and a line(vertical) that itīs the heigth of something.

The next step that i do itīs to choose a vanishing point

Now, it come the question. ŋHow can i know the point "B"?

In a loomis book i read it a metod that itīs to do a elipse.

I have done an example to finish. This is that i want to do.

This is a question that a had a lot of time before but i never have tried to solve it.

Thanks. Sorry for my poor english. I`m learning a lot in this forum.

2. Registered User Level 2 Gladiator: Ordinarii
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Wow... I'm really not sure o_O It's definitely to do with eclipses though - obviously the full circle can be seen at a right angle to the viewer (to the left and right). Sorry I can't help.

3. Registered User Level 1 Gladiator: Andabatae
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In a one point perspective it can be found using the "DPR" and "DPL"

Those are Diagonal Point Right and Left respectively.

They are fairly arbitrary and the size should be at least the size of the section typically. But too far or too close will distort the drawing. They should be located on the Horizontal Line (HL)

Then you setup what is referred to as the perspective grid.

That is draw lines along a horizontal lower than your HL. And intersect them with your DPR and DPL and you will have your placement for objects.

Refer to Francis D.K. Ching architecture books for further reference.

There is a formula for finding exactly where the DPR and DPL should be for no distortion but I am not familiar with it. Can probably find it online somewhere.

4. Registered User Level 1 Gladiator: Andabatae
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i made a quick illustration since without pictures the explanation probably means nothing. granted your DPL should be much further to the left than I made it but here's a quick reference for you.

5. Registered User Level 6 Gladiator: Provocator
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Thanks!.

so Sleipnir this is very difficult (and strange). Then how can i put the character into these position (knowing the exact proportions)?. For your answer, I think that is going to be something like this: " more or less... itīs good. ".

I thought that artists had some method to draw this kind of poses.

Laurar: doesnt matter i dont know too. XDD

Well.. i can sleep knowing that there are no method "simple " to do this.

Bye.. y gracias por todo

6. Registered User Level 1 Gladiator: Andabatae
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find the width on the bottom of the grid then position him accordingly on the angle just like the green lines I put in the illustration.

If you want him sitting it would be just the legs you use for width. So say the person is 6ft tall and their legs are 2.5ft.

Find 2.5inches or whatever scale you are using on that horizontal line in the location to coorespond to the position you want him on the angle. Then draw it in and then the remaining 3.5ft would be along the vertical.

And yes a good amount of perspective is just visualizing it. Remember that's why it is referred to as your perspective.

7. Registered User Level 6 Gladiator: Provocator
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Oh thanks! Yeah..Finally I already undertand you.

But if i have to do a large drawing i couldnt do this lines because i have no paper to put in.

Ok.. a lot of thanks for your help and bye.

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