Pro camera library

[Gravedigg74]

Hello, I have been a photographer for more than 2 years. I got tired of trying to figure out camera frustum settings, so I created my own library for setting the camera with actual camera sensor sizes and lenses.

These two topics got me started:

New Depth of Field Effect

First off, let me note that I did NOT make this. I only ported it from Blender GLSL to jME GLSL. Here’s the original programmer’s link: And here’s the code to implement it if you’re interested: DepthOfField.frag: /* DoF with bokeh GLSL shader v2.4 by Martins Upitis (martinsh) (devlog-martinsh.blogspot.com) ---------------------- The shader is Blender Game Engine ready, but it should be quite simple to adapt for your engine. This work is licensed under a Creative Commons Attribution 3.0 Un…

Converting blender’s camera focal length for use in jme3

So blender cameras aren’t directly supported but the spatial nodes do come in so found a semi simple algorithm for converting blender’s focal distances (based on 35mm film camera) into frustum settings for jme3 cameras. [java] float blenderFocalLength = 50f; //film back for a 35mm camera is 36x24mm float filmBackRatio = FastMath.sqrt(FastMath.pow(36f, 2) + FastMath.pow(24f, 2f)); float frustumSize = 0.02075f * filmBackRatio / blenderFocalLength; float aspect = (float) cam.getWidth() …

I have created a demo, originally to show off to my class, but why not showcase it on the forum as well!

Here are some screenshots:

To create a lens you use:

LensDef lens = new LensDef("Canon EF 24-70mm f/2.8L USM")
            .setCanAutoFocus(true)
            .setFstop(2.8f, 22f)
            .setMaximumFocal(70f)
            .setMinimumFocal(24f)
            .setNearestFocus(0.38f)
            .usableWith(Sensor.FULLFRAME, Sensor.CANON_APS_C);

and to initialize the appstate you call: (an example)

CameraAppState camState = new CameraAppState(Sensor.FULLFRAME, lens.create ());

If you don’t want the depth of field filter you can call:

camState.setDofEnabled(false);

and no filter code will be called on initialization

You can download the program and source from this folder:
EDIT: now on github

Please tell me what you think!

[nehon]

Pretty cool.
I don’t know a thing about photography but that looks nice
Maybe you could setup your sources as a github repo?

[Ogli]

Great! That’s exactly the spirit of indies and geeks and nerds! Can’t be crazy enough to be cool! :chimpanzee_closedlaugh: I love this.

[KonradZuse]

This is great! I’m going to show this to someone who has been into photography for decades (as well as a programmer for decades). Going to see if this will be useful for my project, thanks!

It would be nice, as @nehon said to get it up on github or something similar.

[Gravedigg74]

I will do that once I finish documenting the library to make it easier for others to use

[Ev1lbl0w]

Hum. I tried to implement this library and I did everything above. My scene became invisible. I’m using the same town model. I don’t know what am I doing wrong.

But I noticed something: in the example above, when you initialize the CameraAppState, you give the lens object to the constructor. However, I can only add a Lens object, not a LensDef object. So, I simply created a Lens object and in the construtor I put the lensDef object. Is this the problem?

[Gravedigg74]

I forgot to add that you call create () on the LensDef.
You may also want to turn on auto focus on the lens object, otherwise I can’t tell what you are doing wrong. Take a look at the source for the demo to see how I did it.

[Ev1lbl0w]

I did what you said, but still doesn’t work. I have the setCanAutoFocus method to true. So, I decided to download the demo source, but for some reason it’s in .tmp extension and it doesn’t have size! I guess it’s a problem from Google Drive?

[Gravedigg74]

…I just tied downloading it and I had the same issue, I think it’s to do with 7zip and drive. I can’t test the code but I have uploaded the source I am working on right now for you along with the current library source

[Ev1lbl0w]

Thanks for the help! Let me tell you, your work is amazing! Don’t let this project die like SkyControl!

[Gravedigg74]

Don’t worry, I will be using this library for a long time so I most definitely won’t.
I will upload to the github repository I created once I get home and am able to test the source!

EDIT: I will post the github repository in a new thread if that is ok, along with better explanations on how to use

[thetoucher]

I’ve been using my “physical camera” system for a long time now, you can see some of its interface briefly in this video: https://youtu.be/obnTpQ8JtZk?t=3m26s .

I’ve never released the source but am happy to try and help out if you have any questions regarding more advanced / realistic camera systems =)

[Gravedigg74]

Thanks for offering to help! Right now I have been working on creating a version of CameraNode that implements my library and also detects collisions with the scene.

Right now I have bounding sphere around the camera with a specified radius and have written the code for sensing collisions, but I need to figure out how to reposition the camera when it collides, do you think you could help?

The specific source files are PCameraControl and PCameraNode
Where I sense collisions is in the updatePosition() method of the control

[Gravedigg74]

Btw, that game looks amazing! Is that jme or a different engine?
I do understand what some of the camera values in your interface might do, I use a depth of field filter that has similar variables (I didn’t write the shader however, I only modified it for use in jme)