Search found 14 matches

by damoos
November 16th, 2019, 10:24 pm
Forum: Everything
Topic: Help with projection matrix (again :) )
Replies: 3
Views: 1917

Help with projection matrix (again :) )

Ok, it seems I am still missing some fundamental part of full understanding of the projection matrix. For starters, I have watched Chili's 3D fundamentals video on the subject, and have also read many good book's take on it. It is the pre-perspective divide parts that are giving me trouble, so this ...
by damoos
November 15th, 2019, 5:08 am
Forum: Everything
Topic: Projection matrix and NDC
Replies: 4
Views: 2177

Re: Projection matrix and NDC

Ok, I should clarify. I'm not talking about the Z divide. Just the conversion to NDC, which is pre-perspective divide. In an orthographic projection, you do the same thing.
by damoos
November 14th, 2019, 6:29 am
Forum: Everything
Topic: Projection matrix and NDC
Replies: 4
Views: 2177

Projection matrix and NDC

Simple questions as I wrestle with the perspective projection matrix. First, I am assuming that the "width" of the frustum in the equation is a subset of whatever coordinate "units" I choose to use. To clarify, let's say my world is --1000 to 1000 in the x axis, and that I've decided that my camera ...
by damoos
September 21st, 2019, 6:44 pm
Forum: Everything
Topic: Best way to write pixels with software renderer
Replies: 2
Views: 1903

Best way to write pixels with software renderer

I am writing a software based rendering engine (for fun/education) Clearly bottom line speed isn't my goal, but I would like it to be as fast as a can be without gpu/directx help. Using C++ and Windows 10, VS 2017. Win 32 API. Back in the old days, I would have access to a frame buffer, and would ha...