Using sprites for HUD etc.

MickGyver · 05 November 2019, 17:22

How would one go about setting up sprites to use for a HUD or the like? Say I wanted to use four 16px wide sprites to make a HUD that is 64px wide, how would I then draw images and text to the sprites making up the HUD?

Shatterhand · 05 November 2019, 17:35

You create the sprites and draw them as needed... I am not sure I understood your question.

I know the game looks shit, but the numbers on the above portion of screen are sprites. Each digit is a sprite.

MickGyver · 05 November 2019, 17:49

Thanks, I was thinking about the possibility to manipulate sprite data like bitmaps, to have a more "dynamic" sprite built of shapes and text etc.

MickGyver · 05 November 2019, 17:51

The HUD on Rod-Land is what I would like to achieve, might be too complicated: https://codetapper.com/amiga/sprite-tricks/rod-land/

Shatterhand · 05 November 2019, 17:58

Oh I see.

You can draw the sprites and then blit the extra info (Scores / lives etc) on top of it.

Or I believe you could have a bitmap where you draw the stuff you want, use the GetaSprite command to make a sprite out of it and draw it on screen as a sprite. I dont think it would be faster than just blitting over the sprite though.

Though if you want to scroll the rest of the screen, it would be a better way to do it, as you can scroll the bitmap and keep the sprites intact.

Daedalus · 05 November 2019, 22:36

You can do it very easily by drawing directly to shapes (ShapesBitMap, MakeCookie), then transferring the image data to the sprite using GetaSprite. This copies the image data, so it's not entirely efficient, but if it's a relatively small amount of information the time taken should be minimal.

I haven't tried it, but to actually draw directly to the sprite image data, you could use CludgeBitmap, which sets up a bitmap object but doesn't allocate any memory for it. Instead, you give it a pointer to already-allocated memory, such as manually decoded image data, or the bitmap of a sprite.

Code:

myBitMap.l = Peek.l(ADDR Sprite 0)
CludgeBitmap 0, 16, 16, 2, myBitMap

should give you the image data pointer, then create bitmap object ID 0 (16x16, 4 colour) at that location, allowing you to draw to it at will. Bear in mind that that will update in realtime on the screen, so you might want to synchronise your drawing with VWait.

MickGyver · 06 November 2019, 08:13

Thanks guys! CludgeBitmap seems to be what I'm looking for. I'll have a go at it and report back!

05 November 2019, 17:22	#1
MickGyver Registered User Join Date: Oct 2008 Location: Finland Posts: 643	Using sprites for HUD etc. How would one go about setting up sprites to use for a HUD or the like? Say I wanted to use four 16px wide sprites to make a HUD that is 64px wide, how would I then draw images and text to the sprites making up the HUD?

05 November 2019, 22:36	#6
Daedalus Registered User Join Date: Jun 2009 Location: Dublin, then Glasgow Posts: 6,334	You can do it very easily by drawing directly to shapes (ShapesBitMap, MakeCookie), then transferring the image data to the sprite using GetaSprite. This copies the image data, so it's not entirely efficient, but if it's a relatively small amount of information the time taken should be minimal. I haven't tried it, but to actually draw directly to the sprite image data, you could use CludgeBitmap, which sets up a bitmap object but doesn't allocate any memory for it. Instead, you give it a pointer to already-allocated memory, such as manually decoded image data, or the bitmap of a sprite. Code: myBitMap.l = Peek.l(ADDR Sprite 0) CludgeBitmap 0, 16, 16, 2, myBitMap should give you the image data pointer, then create bitmap object ID 0 (16x16, 4 colour) at that location, allowing you to draw to it at will. Bear in mind that that will update in realtime on the screen, so you might want to synchronise your drawing with VWait.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Some sprites	Frog	project.Sprites	6	22 August 2022 20:01
Requesting a specific HUD part from Alien Breed 3D	dex	project.Sprites	10	08 February 2011 21:37
Where to get GfxRip and Sprites	Joe Maroni	project.Sprites	0	11 November 2006 13:02
Hacked Sprites	The Master	Looking for a game name ?	2	15 May 2006 17:20
Where are all the sprites?	Gambit37	project.Sprites	8	14 October 2005 14:49

05 November 2019, 17:35	#2
Shatterhand Warhasneverbeensomuchfun Join Date: Jun 2001 Location: Rio de Janeiro / Brazil Age: 41 Posts: 3,450	You create the sprites and draw them as needed... I am not sure I understood your question. I know the game looks shit, but the numbers on the above portion of screen are sprites. Each digit is a sprite.

05 November 2019, 17:49	#3
MickGyver Registered User Join Date: Oct 2008 Location: Finland Posts: 643	Thanks, I was thinking about the possibility to manipulate sprite data like bitmaps, to have a more "dynamic" sprite built of shapes and text etc.

05 November 2019, 17:51	#4
MickGyver Registered User Join Date: Oct 2008 Location: Finland Posts: 643	The HUD on Rod-Land is what I would like to achieve, might be too complicated: https://codetapper.com/amiga/sprite-tricks/rod-land/

05 November 2019, 17:58	#5
Shatterhand Warhasneverbeensomuchfun Join Date: Jun 2001 Location: Rio de Janeiro / Brazil Age: 41 Posts: 3,450	Oh I see. You can draw the sprites and then blit the extra info (Scores / lives etc) on top of it. Or I believe you could have a bitmap where you draw the stuff you want, use the GetaSprite command to make a sprite out of it and draw it on screen as a sprite. I dont think it would be faster than just blitting over the sprite though. Though if you want to scroll the rest of the screen, it would be a better way to do it, as you can scroll the bitmap and keep the sprites intact.

06 November 2019, 08:13	#7
MickGyver Registered User Join Date: Oct 2008 Location: Finland Posts: 643	Thanks guys! CludgeBitmap seems to be what I'm looking for. I'll have a go at it and report back!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)