Author Topic: Life Force for the HP Prime  (Read 8518 times)

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Offline Han

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Life Force for the HP Prime
« on: January 14, 2014, 03:20:46 pm »
Anyone here ever heard of Life Force (part of the Gradius, Salamander and Gradius family of shmups)? I am considering making a shmup based on this game. So far I have scrolling background done. We will see if the HP Prime can handle games with complexity on the order of NES games.

Offline DJ Omnimaga

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Re: Life Force for the HP Prime
« Reply #1 on: January 14, 2014, 04:18:23 pm »
I don't think I heard about it, but I know Gradius and such shooters. It would be interesting to see how the Prime can handle them. Hopefully the scrolling background won't slow the game down too much (although my concern is more if the game is Touhou/IkarugaX-like and there are too many bullets on the screen).
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Offline Keoni29

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Re: Life Force for the HP Prime
« Reply #2 on: January 14, 2014, 04:24:16 pm »
It's not really a bullet hell. There are enough bullets to make your life miserable at times though.
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Offline TIfanx1999

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Re: Life Force for the HP Prime
« Reply #3 on: January 14, 2014, 05:47:25 pm »
Sounds awesome Han! It'll be interesting indeed to see how well the Prime handles this sort of game. :D

Offline Zera

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Re: Life Force for the HP Prime
« Reply #4 on: January 14, 2014, 09:48:39 pm »
I attempted a similar project once, based on Nemesis (Gradius rebranding) for the MSX1. I actually still have the assets if you want to use them. The project has been dead for years, so feel free to use any of the materials for any purpose.

An advance warning: My project files are extremely disorganized. I threw all the sprites into a rather sloppy PNG file. The level maps and tileset are in CalcGS format, so I included the program's executable in the ZIP file as well.

Offline DJ Omnimaga

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Re: Life Force for the HP Prime
« Reply #5 on: January 14, 2014, 09:50:12 pm »
Oh I remember that and it looked pretty good. I wonder how this could be adapted for the 320x240 screen. Of course, nothing stops anyone from using a smaller resolution, though, since the images on the HP Prime can be scaled up/down.
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Offline Han

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Re: Life Force for the HP Prime
« Reply #6 on: January 14, 2014, 09:52:30 pm »
Zera,

Thank you for sharing! I'll hold off on peeking too much into your code for now. So far I have only looked at the sprites. I would like to see if I can get this project off the ground from scratch. Your mockup certainly looks cool, though!

Offline bb010g

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Re: Life Force for the HP Prime
« Reply #7 on: January 14, 2014, 11:06:59 pm »
Can't wait! (It'll be interesting to see how you'll handle the bullet sprites.)
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Offline Han

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Re: Life Force for the HP Prime
« Reply #8 on: January 14, 2014, 11:53:38 pm »
Here's a sneak peak of the current progress!


Offline Han

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Re: Life Force for the HP Prime
« Reply #9 on: January 15, 2014, 12:02:39 am »
Can't wait! (It'll be interesting to see how you'll handle the bullet sprites.)

I have come up with several techniques; the real question will be which one is the fastest. I will probably put a soft limit on the total number of movable objects on the screen and see how the machine handles everything. So far, I'm pretty impressed with what this machine can do. The current main loop even requires a delay in between frames in order to slow it down since no delays means the scrolling goes by too fast (even if it's single pixel scrolling). We'll see what happens when more stuff is added.

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Re: Life Force for the HP Prime
« Reply #10 on: January 15, 2014, 12:04:43 am »
Woah this looks absolutely cool Han! O.O I would like to see a screenshot, though, since on video it's kinda blurry.
In case you are wondering where I went, I left Omni back in 2015 to form CodeWalrus due to various reasons explained back then, but I stopped calc dev in 2016 and am now mostly active on the CW Discord server at https://discord.gg/cuZcfcF



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Offline bb010g

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Re: Life Force for the HP Prime
« Reply #11 on: January 15, 2014, 12:05:30 am »
Han: Are all those dots live-rendered bullets? If so, sweet!
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Offline Han

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Re: Life Force for the HP Prime
« Reply #12 on: January 15, 2014, 12:19:13 am »
Han: Are all those dots live-rendered bullets? If so, sweet!

No, those are bg tiles and signify "walls."

Below is a screen shot from the emulator.

Offline DJ Omnimaga

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Re: Life Force for the HP Prime
« Reply #13 on: January 15, 2014, 12:59:47 am »
Looks really cool! :D
In case you are wondering where I went, I left Omni back in 2015 to form CodeWalrus due to various reasons explained back then, but I stopped calc dev in 2016 and am now mostly active on the CW Discord server at https://discord.gg/cuZcfcF



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Re: Life Force for the HP Prime
« Reply #14 on: January 15, 2014, 09:06:02 am »
This is looking awesome, keep up the great work! :D

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