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by tipam
Fri Jun 19, 2020 3:07 pm
Forum: General discussion
Topic: New 3D printed Pi4 case designs for overclocking
Replies: 7
Views: 350

Re: New 3D printed Pi4 case designs for overclocking

Just added back to back stand and stackable SSD drive mount (available on the same Thingiverse page https://www.thingiverse.com/thing:4463789) Here are some configurations ... http://www.skillmanmedia.com/images/Pi4/Pi4ssdStand.jpg http://www.skillmanmedia.com/images/Pi4/Pi4ssd2stack.jpg http://www....
by tipam
Thu Jun 18, 2020 7:36 pm
Forum: General discussion
Topic: New 3D printed Pi4 case designs for overclocking
Replies: 7
Views: 350

Re: New 3D printed Pi4 case designs for overclocking

Case looks good. I'm not sure about using PLA for it though. The glass transition temperature of PLA is well within the normal operating temperature range of a Pi 4. Good point ... the Pi board is approx. 1.5mm from bottom of the case resting on edge supports and has a vent underneath. Continuous c...
by tipam
Thu Jun 18, 2020 6:06 pm
Forum: General discussion
Topic: New 3D printed Pi4 case designs for overclocking
Replies: 7
Views: 350

Re: New 3D printed Pi4 case designs for overclocking

That one fault is the part above the red piece, it is a bit thin and with too much pressure with the red piece, it could break and then the grille could be loose and need to be fixed. The red piece is pretty tough (5mm thick) ... you only see a thin rim once it's pushed into the back of the case. I...
by tipam
Thu Jun 18, 2020 2:34 pm
Forum: General discussion
Topic: New 3D printed Pi4 case designs for overclocking
Replies: 7
Views: 350

New 3D printed Pi4 case designs for overclocking

Hi If anyone is interested, I've posted new 3D printable, Pi4 cases for overclocking on Thingiverse Both cases have instructions and can slide onto a stand. I'm currently working on adding an SSD housing as well (built into the stand). The cases use either a 30x30x7mm 5V fan or the ICE Tower fan; [e...
by tipam
Thu Jun 18, 2020 10:19 am
Forum: General discussion
Topic: How can you make a custom raspberry pi car chassis?
Replies: 2
Views: 139

Re: How can you make a custom raspberry pi car chassis?

You can create a chassis the good old fashioned way by cutting ply and fixing parts to it. However, taking the 3D printer route would require you to model it in 3D using something like Blender (Blender.org). I wouldn't recommend sending your design to a print service (unless money is no object) and ...
by tipam
Fri May 01, 2020 10:58 am
Forum: Troubleshooting
Topic: St7735 showing gibberish
Replies: 6
Views: 302

Re: St7735 showing gibberish

Hi - I did a quick (non-technical) video on connecting this type of screen to the Pi just yesterday ... try it out and see if it works on yours .. https://www.youtube.com/watch?v=ST2sDStY-oA It might not address the RetroPi issue but it might help to check your screen ;) Ps. Pi in vid was using late...
by tipam
Mon Dec 16, 2019 11:35 pm
Forum: OpenGLES
Topic: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)
Replies: 53
Views: 15461

Re: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)

@tipam Hello, is the site http://www.skillmanmedia.com/ShaderToyRPi4.zip still online ? I'm having problem accessing it. :oops: :oops: Apologies! skillmanmedia.com was down for a while (forgot to update the ICANN email and they hate that!) You can still download the demo at http://www.skillmanmedia...
by tipam
Sat Dec 07, 2019 1:12 am
Forum: Teaching and learning resources
Topic: Cross platform devs on the Raspberry Pi with no installation
Replies: 0
Views: 690

Cross platform devs on the Raspberry Pi with no installation

Cross platform devs on the Raspberry Pi Hi! I think it's worth mentioning that Google just brought out https://dartpad.dev as a web app for trying out Dart with Flutter for example. I've found that the code can be simply copy/pasted into an Android/iOS Flutter project and published to a mobile devi...
by tipam
Sat Dec 07, 2019 12:51 am
Forum: Other programming languages
Topic: Dart Native on Raspberry Pi
Replies: 14
Views: 3751

Re: Dart Native on Raspberry Pi

I think its worth mentioning that dartpad.dev works well on RPi as a web app.

https://dartpad.dev

Check it out!
by tipam
Wed Jul 31, 2019 6:41 pm
Forum: OpenGLES
Topic: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)
Replies: 53
Views: 15461

Re: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)

. I have no idea how the shader maths works yet but it is easy to modify and see the results. You're right! ... some of those shaders are insane! ... If you have a PC with an NVidia/AMD graphics card you'll find some crazy shaders .. For example https://www.shadertoy.com/view/MsGGDK is a mini movie...
by tipam
Tue Jul 30, 2019 11:09 pm
Forum: OpenGLES
Topic: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)
Replies: 53
Views: 15461

Re: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)

... Added a fix to ShaderToy; iResolution should be a vec3 (not vec2) in a shader file. Shaders updated accordingly plus there's a few more nice shaders to play around with!

Here's the link: http://www.skillmanmedia.com/ShaderToyRPi4b.zip
by tipam
Sun Jul 28, 2019 7:17 pm
Forum: OpenGLES
Topic: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)
Replies: 53
Views: 15461

Re: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)

Downloaded, tested, it works. The only problem I noticed is unresponsible X when playing with "heavy" shaders. Not wholly surprising - some of those shaders requires a HUGE amount of GPU processing, and X rendering requires...the GPU. You're right - but I'm still quite surprised the humble Pi4 can ...
by tipam
Sat Jul 27, 2019 5:59 pm
Forum: OpenGLES
Topic: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)
Replies: 53
Views: 15461

RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)

Hi, I've just written a small app that will render over 100+ OpenGL ES 3.0 shaders (pinched from ShaderToy.com) to give an idea of what can be done with the RPi 4 GPU. Link: http://www.skillmanmedia.com/ShaderToyRPi4.zip You will need to install the SDL2 libraries from a terminal window and reserve ...
by tipam
Mon May 06, 2019 8:22 pm
Forum: C/C++
Topic: High speed font cache rendering in C++ on the Pi Zero
Replies: 0
Views: 350

High speed font cache rendering in C++ on the Pi Zero

Hi, I hope you don't mind me sharing a quick video on rendering TTF fonts using SDL2 on the Raspberry Pi Zero written in C++. The video depicts a 3D scene with a passage of text containing 5000 formatted characters (not 9000 as I say in the vid!) that are dynamically rendered at 1080p on the Zero. T...
by tipam
Wed Apr 17, 2019 9:04 pm
Forum: Graphics programming
Topic: Performance improvements to the SDL library?
Replies: 0
Views: 734

Performance improvements to the SDL library?

Hi,

It mentions in the latest update of Raspbian (2019-04-08) that there are 'Performance improvements to the SDL library' ... does anyone know what they are and how to benefit from them?

Thanks.
by tipam
Mon Dec 24, 2018 5:01 pm
Forum: OpenGLES
Topic: Sharing an OpenGLES 2.0 Christmas Scene ...
Replies: 12
Views: 6242

Re: Sharing an OpenGLES 2.0 Christmas Scene ...

Gavinmc42 wrote:
Sun Dec 23, 2018 12:17 pm
Lots of super realistic stuff is out there now, lots of research papers and lighting/particle effects to do to make them look real.
... you can do a lot with simple UV animation, sprite sheets and alpha textures :D
.
by tipam
Sun Dec 23, 2018 12:27 am
Forum: OpenGLES
Topic: Sharing an OpenGLES 2.0 Christmas Scene ...
Replies: 12
Views: 6242

Re: Sharing an OpenGLES 2.0 Christmas Scene ...

Just added a video on Youtube featuring an update of this demo with a hotel and snow! Here it is .. https://youtu.be/goHVP0a85JY I'll do my best to get it out (inc. source code) before next year :oops: Here are some snapshots from an RPi 3 B+ ... http://www.skillmanmedia.com/images/Stoneman1.png htt...
by tipam
Tue Nov 27, 2018 1:31 pm
Forum: OpenGLES
Topic: Sharing an OpenGLES 2.0 Christmas Scene ...
Replies: 12
Views: 6242

Re: Sharing an OpenGLES 2.0 Christmas Scene ...

Gavinmc42 wrote:
Tue Nov 27, 2018 11:53 am
The only work the CPU has to do is calculate collisions, basic rotations and around 25 draw calls :)
That leaves a lot for a game engine ;)
...Yes, you're right ... on my Pi3B+ the scene only takes 7-8% CPU time in desktop.
by tipam
Tue Nov 27, 2018 8:00 am
Forum: OpenGLES
Topic: Sharing an OpenGLES 2.0 Christmas Scene ...
Replies: 12
Views: 6242

Re: Sharing an OpenGLES 2.0 Christmas Scene ...

Ah! double posted!!
by tipam
Tue Nov 27, 2018 8:00 am
Forum: OpenGLES
Topic: Sharing an OpenGLES 2.0 Christmas Scene ...
Replies: 12
Views: 6242

Re: Sharing an OpenGLES 2.0 Christmas Scene ...

I had been wondering what you have been up to :D The real Yosemite? That would mean using DEM terrain data plus procedurally generated trees? ... Leon's stuff is really pushing it, did not notice the 800fps :o As I barely understand the VC4 the texture units are hardware so should be able to keep u...
by tipam
Mon Nov 26, 2018 11:45 pm
Forum: OpenGLES
Topic: Sharing an OpenGLES 2.0 Christmas Scene ...
Replies: 12
Views: 6242

Re: Sharing an OpenGLES 2.0 Christmas Scene ...

Tim, yet another impressive output. You still using SDL? Hi Gavin, Yes, still using SDL2 as it takes care of the bare metal stuff on several platforms! Then I found this, 27KB OpenGLES triangle in C https://github.com/LdB-ECM/Raspberry-Pi Turns out this sort of baremetal stuff can be done in Pascal...
by tipam
Sun Nov 25, 2018 3:08 am
Forum: OpenGLES
Topic: Sharing an OpenGLES 2.0 Christmas Scene ...
Replies: 12
Views: 6242

Sharing an OpenGLES 2.0 Christmas Scene ...

I'm still working on an OpenGLES 2.0 lightweight and fast engine for the Pi and a number of examples ... Here's a scene from one of my favourite places on the planet ... Yosemite! It's running at 24fps with over a 1000 trees, mutli-layered animated clouds, a huge area to explore (including a wood ca...
by tipam
Sat Jul 21, 2018 9:34 pm
Forum: OpenGLES
Topic: Star Citizen on the Raspberry Pi?!
Replies: 100
Views: 49655

Re: Star Citizen on the Raspberry Pi?!

Tim, I can report that your multi-scene download works on the RPi nicely. I had to globally change the \r\n line ending in Kendal castle mtl file to \n before it would load any textures and I had to rename a couple of the bridge textures to match (fx3_panels and medmon1 I think). Paddy PS it's worr...
by tipam
Sat Jul 21, 2018 8:58 am
Forum: OpenGLES
Topic: Star Citizen on the Raspberry Pi?!
Replies: 100
Views: 49655

Re: Star Citizen on the Raspberry Pi?!

Gavinmc42 wrote:
Sat Jul 21, 2018 2:40 am
... new demo does not run on Gentoo64.
... sorry about that - things weren't in the right folders and I've updated the README1ST. I've uploaded again :oops:
by tipam
Sat Jul 21, 2018 1:26 am
Forum: OpenGLES
Topic: Star Citizen on the Raspberry Pi?!
Replies: 100
Views: 49655

Re: Star Citizen on the Raspberry Pi?!

NEW UPDATE!

Demo now includes the following;

- CargoBay scene (updated)
- Cargoship Bridge scene
- Kendal Castle

Download the demo from here (34Mb) and open README1ST file

To run a demo (after following instructions) do the folliowing;

Code: Select all

$ ./ShipDemo -scene CargoBay.scene
Enjoy!

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