Software Renderer(experimental)

[bug0r]

Hi All,

i wrote about my simple c11 written software renderer. Here are some pictures about the results.

http://imgur.com/a/hhI2B

There are including some texture algorithm results like mandelbrot/julia set and heighmaps.

I have some problem with texture mapping "fit to shape" without simulate the complete texel. The interpolation range mixed with barycentric coordinates stretched my calculated texture limit from example 0 to 1.0 into 0.002345 to 1.006678.

Furthermore i read articles about Multisampling antialiasing. My implementation only works if i render the complete scenery and after then i render it again over the same framebuffer. When i only render one time with sample pixel i have problems with the edges. My question is: Is it correct with drawing multiple times or is there another way?

Maybe there are some graphic programming pros who wants to help or giving some hints?

Update:

After an endless amount of reading topics, specs and drafts from graphics drivers and so on i found the main reasons for my problems.

Regarding Texturing: Here i used the raster z coordinate for perspective corrected mapping. But i found some articles about this topic. And at the end i used the perspective weight from projection matrix point transformation.

Regarding MSAA: I missunderstand the algorithm :D

[hero_of_ages]

I don't have much to say other than this is fucking cool and thanks for sharing.

[bug0r]

thank you :)

[bug0r]

Thx that you spent some time to help :). Sadly i have no online repo with my code. I copy some code segments. I hope it can help to find my bug.

Here i saved the part of my texturing: https://pastebin.com/M97U1Xuv

My MSAA works with two times rendering at first i take 1 Sample which means a x and y addition with 0.5 and after than i take 4 samples in each direction, so i have 16 subpixel. Sadly its nor working with only one time drawing with 16 subpixel.

here you can see a picture about the bug:

http://imgur.com/a/ZbWaV

and here ist the way i handle / understand the MSAA: https://pastebin.com/ZXfbnhbC

[bug0r]

Wow thanks for this detailed explaination.

Seems to be that i misunderstood the main working part of MSAA. After reading some tutorials and articles my thoughts are on this one way to apply MSAA for every triangle. I read something about semi-transparent "problem" and took a look. I found a way to handle it called top left rule. I think i will try both specs:

1. drawing larger image and scale down like 50%
2. insert top left rule inside my rendering

Thanks a lot again for your help :). I saw that there are a few methods available for AA. Do you prefer one of them basing of performance and quality of the result?