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Forum Index : Microcontroller and PC projects : PicoMiteVGA: Framework for ray casting using the DDA method
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Martin H. Guru  Joined: 04/06/2022 Location: GermanyPosts: 1422 |
Hi Kevin Quite possible. I haven't looked at Peters new routines yet, except for the video. Consider it ‘sporting ambition’ on my part. I read up on it and started implementing it in Basic on the Pico at a usable speed (see the first post). Once the function was in place, I optimised the routines for speed as far as possible. Regardless of the fact that there is now an ‘out of the box’ version for it. The last posted Version was a a first attempt. I have already added the adjustment for CMM2/MMB4W; the version will be available tomorrow.  Hope that made some sense.  Cheers Martin 'no comment |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 769 |
Hi Martin, No I absolutely understand, it's the challenge of trying to wring the best performance our of what you have. I do it myself all the time, obsessively ;-) I'll give your latest version a spin when you publish it. Regards Kevin. |
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| Martin H. Guru Joined: 04/06/2022 Location: GermanyPosts: 1422 |
added different textures added the Image RESIZE_FAST command for Win/CMM2 re-added View-Bobbing, ccast091.zip  Have Fun Martin Edited 2026-03-06 19:42 by Martin H. 'no comment |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 769 |
Hi Martin, yes that's working fine, it's slightly slower than the previous version, About 15 to 16fps at 320x240 and about 8fps at 480x320. On a HDMI 640x480 @378Mhz about 14fps Or a HDMI 640x320 @252Mhz about 9 to 10fps Or a HDMI 1024 (actually 512) @375Mhz 20 to 21fps Regards Kevin. |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 5777 |
Hi Martin, on RP2040 VGA @252MHz it is 4FPS. Quite nice... Volhout. PicomiteVGA PETSCII ROBOTS |
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| Martin H. Guru Joined: 04/06/2022 Location: GermanyPosts: 1422 |
Hi Kevin, To speed up image rendering, you can set the variable resStep from 2 to 4. This will make the changes more angular, but only half as many scans will be performed per frame. ' --- Grafik Setup --- Dim integer resStep = 4' Wich... 'no comment |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 5777 |
@Martin, With reStep=4 and 6 I get a Blit-RESIZE error "number out of bounds". Line 114 Same when I run with line 115 after commenting out line 114. Volhout Edited 2026-03-06 23:55 by Volhout PicomiteVGA PETSCII ROBOTS |
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led-bloon Senior Member  Joined: 21/12/2014 Location: AustraliaPosts: 209 |
Thanks gentlemen for some very interesting code! I have added some trivial changes to the code for aesthetics. Some of it may be of interest. Tested on PicoMite HDMI only. 1. I have added a text line for angleIndex (simple) although a small "North-Up display" would be better (beyond my pay-grade) 2. I have added a small replica of the map (plus user current position) under the text info. 3. I have moved the displayed Frame buffer, both X & Y, by a fixed offset (ScrnOff). 4. Removed UCASE$ on keyboard input, checking for "asdw" now and also added arrow keys for movement (Chr$(x) -> 128,129,130,131) Added CASE ELSE at bottom: screenRedraw = 0 (for any non-movement keys) 5. Played a little with the wall texture BMPs. 6. Some other minor changes ... can't remember all of them, but minimal. led ccast1b2.zip Edited 2026-03-07 09:58 by led-bloon Miss you George |
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| Martin H. Guru Joined: 04/06/2022 Location: GermanyPosts: 1422 |
Hi led-bloon So did I in the last release the use of UCASE$ avoids me having to query letters in both states, e.g. ‘a’ or ‘A’, thus saving another operation. Checking the cursor keys makes sense, I just hadn't implemented it yet, thank you. I'll take a look at that. I'm also considering whether I should create 32x32 and 16x16 versions to prevent pixelation caused by excessive reduction (just a thought, as you have more control over this in the drawing programme).  Thank you, I'll test your version on the Pico later. Cheers Martin Edited 2026-03-07 22:51 by Martin H. 'no comment |
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