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Can anybody shed some light on the difference and relation between these matrizes? Shaun Lebron Shaun Lebron 1, 17 17 silver badges 26 26 bronze badges. If you used the draw function, the modelview matrix is actually initialized to the camera matrix before each time it is called. Sign up or log in Sign up using Google. Also my terminology is all over the place so please feel free to correct me. The camera matrix is merely a convenient separation of what the modelview is usually initialized to. The main error apparently was to set the camera matrix instead of the projection matrix.

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I am trying to pick apart how Processing is implementing openGL. The camera matrix is merely a convenient separation of what the modelview is usually initialized to.

Email Required, but never shown. I have some understanding of openGL i just finished reading the red book and have been using Processing for some time.

I want to extend processing in order to be able to render 3D stuff with oblique projections cabinet or cavalier.

This is a good resource for learning it: How do we handle problem users? This results in the right perspective, but without surface filling.

Source code: Class PGraphics3D.java part of core version 3.0.2

Stack Overflow works best with JavaScript enabled. I have to get some of the dumb questions out of the way sorry. Also this was a while ago but some one in the old forum made a post showing the differences in speed when using direct openGL calls. Here's a runnable example for creating a cabinet projection that displays some cubes: If you used the draw function, the modelview matrix is actually initialized to the camera matrix before each time it is called.

Java Source Code: ics3D

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I searched for it but couldn't find it. Shaun Lebron Shaun Lebron 1, 17 17 silver badges 26 26 bronze badges. Opaque polygon not rendering correc I think processing calculates the lighting per-vertex and then just send the data to OpenGL as vertex colors.

How is lighting being handled then when using openGL? Pgrzphics3d are only performed using the modelview and projection matrices. As a disclaimer, you must truly understand how matrices are used to transform coordinates.

The program was using circle collisions and was just winging out circles all over the place. Change topic type Cancel.

If any one can link me to this post or any other posts where people where demonstrating the speed differences from using native Processing and making calls directly to openGL. Oblique perspective - projection matrizes in processing Ask Question.

Move this topic Pgdaphics3d. Moreover I'm a little bit confused about the matrizes in PGraphics3D: Post as a guest Name. So you want to apply the oblique projection before the transformation into screen coordinates. Can anybody shed some light on the difference and relation between these matrizes? Thanks for the detailed explanation and link.

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Improving the question-asking experience. After looking around source of the cameraperspective and ortho methods I was able to set up an orthographic perspective and then adjust the PGraphics3D camera matrix to an pgraphjcs3d value with partial success. Unicorn Meta Zoo 9: Order is very important.