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Pseudo-3D map renderingHave been mulling this over for a while, until that isometric thread prompted me to ask. I'm not sure if this is officially classed as 2D, 2.5D, or 3…
... Miner remake to separate collision from the attributes (2/3 screen ... type T, N tiles long from x,y so each level didn't ... -
Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
... the snapshot from
... based as opposed to pixel based system
... A ; Save new X Position
; Get x,y
LD A,(IX ... ACHAR
; Calculate address of char
Pixel Explosion CodeJust a little snippet to cause explosive effects. It uses table lookups for the screen address, and can handle up to 32 pixel particles. A particle…
... br /> ; *****************************************************************
; Title: Pixel Explosion
; File: pixel01.asm ... to ensure that from now on the ... now has proper address for x,y position
...Getting scr addresses from x and yCould someone please tell me how to calculate the 8 screen addresses corresponding to a character printed in basic at coordinates x and y? For examp…
... tell me how to calculate the 8 screen ... in basic at coordinates x and y?
... x=15: let y:11
20 print at y,x; "K"
X ... will be moving between 0-31 and y ... between 0 and 21. What would be the formula to calculate ...Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …
... significant bits which determine the pixel position. The instruction AND 56 ... our vertical screen address. From there we take our ... here is a typical y,x coordinate and the screen memory ... Jonathan Cauldwell's alorithm to calculate it:
...Better arrangement for video memory?While doing some documentation work for the ZX-Uno project, I compared the advantages of the weird layout of the ZX Spectrum against a linear layout.…
... a display address from the X,Y coordinates of a pixel needs some rotate ... the scans for character at position 0,1 ... and bytes ... the scans for character at position 0,31. Using the ZX ... the routine to calculate the screen address from the X,Y coordinates to be ...IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... .z80 file available from [url="http://www. ... /> ; based as opposed to pixel based system
; ACHAR
; Calculate address of char
X Position (0-31)
; 1 = Y Position (0-23)
SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…
... AT command to specify the x/y pixel position to PRINT at. Although you ... ; Including code by Ian Beardsmore from Your Spectrum issue 7, September ... ld (chrad), hl ; screen and calculate the address in the
from a
ld a, ...Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…
... X and Y co-ordinates and
;move to the new printing position ... fit on the screen and calculate
;the address in ... character definition into the correct pixel position, place it
;on ... the
;attributes file from a given display file address ...Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…
... /> ; Including code by Ian Beardsmore from Your Spectrum #7, September 1984 ... /> jr z, getyp ; the X and Y co-ordinates and move to ... ), hl ; on the screen and calculate the address
ld a ... the
rr h ; correct pixel position, place it on the
Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…
... ;543525]Storing the position as an X coordinate (from 0 to 28, in ... routine, which just works with X/Y coordinates and doesn't have ... even a register and easily calculate the real address based on ... ; move high bit rightmost paddle pixel from hl to de
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... /> ; Including code by Ian Beardsmore from Your Spectrum #7, September 1984 ... /> jr z, getyp ; the X and Y co-ordinates and move to ... ), hl ; on the screen and calculate the address
ld a ... the
rr h ; correct pixel position, place it on the
How to get the current line position of a +3e's text window?Does anybody know how to get the current line position of a [url=http://www.worldofspectrum.org/zxplus3e/]ZX Spectrum +3e[/url]'s text window? I've r…
... case) and then calculate the row position as needed.[/QUOTE]< ... ; bottom right of window x-coord (0-31)
... ; bottom right of window y-coord (0-23)
... w_ppos ds.b 1 ; pixel position within character square (0-7 ... says, but the pixel line from the top of the ...ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…
... of the initial position so you can calculate the x&y movement, however ... /> ;; add x,y
_ulzfa033:
ld a,66 ; 7t - ***loaded from above ... /> ;;
;; check if attr or pixel
ld c,1 ; 7t ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
; look up screen address from the table
ld a ... x, y position
; hl = pointer to 8 bytes graphic data
; b = pixel y ... /> inc e
; next row, calculate screen address
pop hl ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
; look up screen address from the table
ld a ... x, y position
; hl = pointer to 8 bytes graphic data
; b = pixel y ... /> inc e
; next row, calculate screen address
pop hl ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
; look up screen address from the table
ld a ... x, y position
; hl = pointer to 8 bytes graphic data
; b = pixel y ... /> inc e
; next row, calculate screen address
pop hl ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... x, y position
; hl = pointer to 8 bytes graphic data
; b = pixel y ... /> inc e
; next row, calculate screen address
pop hl ... />
You need to start from something that works, I expect ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... x, y position
; hl = pointer to 8 bytes graphic data
; b = pixel y ...
; look up screen address from the table
ld a ... /> inc e
; next row, calculate screen address
pop hl ...IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
...
; based as opposed to pixel based system
; ... br />
; ACHAR
; Calculate address of char
sprites:
; 0 = X Position (0-31)
; 1 = Y Position (0-23)
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... add offset based on pixel position of ycar
... LD A,(YOFFSET) ; Get Y Offset
LD E, ... SUB E ; take it from 8
RLA ; double ... />
WRITECHAR:
; C = X, L = B, DE = GFX
Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …
... Anyway, snapshot can be got from:
[url="http:// ... add offset based on pixel position of ycar
... SUB E ; take it from 8
RLA ; double ... Priorities: Mask, Char line, Y char, X char
;Attributes: ...Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
... on the screen based upon x,y pixel coordinates, which are altered by ... / Currently, I calculate the screen hl coordinates for each pixel row of ... rub-out the old sprite position without suffering a horribly flickery ...How to create pretty screenshot maps[size=+1][b]A. What will I need?[/b][/size] 01. Your favorite [url=http://www.worldofspectrum.org/emulators.html]Speccy emulator[/url]. 02. An util…
... . An utility for capturing screenshots from emulators, e. g. [url= ... ZX SS and adjust correct position manually with using arrow buttons ... of a screen about one pixel use Cursor Keys + SHIFT ... the map, color depth, step X/Y values, colors, etc. (look at ...Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…
... a pixel row for the speccy in assembly. One is to calculate ... the address by ways of shifting and masking the X & Y ... suppose that holds the Y address of each pixel row.
y co-ord of a pixel row efficiently? It ...FZX Driver for z88dkAn fzx library for z88dk can be downloaded [URL="https://drive.google.com/file/d/0B6XhJJ33xpOWM2hWNjAxMVkxaEk/edit?usp=sharing"]here[/URL]. The libr…
... int fzx_setat(uchar y, uchar x);[/B]
Print position can also be ... information on a single character from the current character set.< ... );[/B]
Return the pixel width of the buffer. Newline ... some processing, to load fonts from disk or network.
...SpecBAS 0.802 Released!Hi folks - It's that time again when I release the latest round of features and bugfixes to SpecBAS :) New for this version are ZONEs which act ver…
... minimum respectively - performs a pixel-by-pixel compare
Optimised the ... for the texture - CIRCLE x,y,r FILL will suffice
from a base to decimal
position of the first match using ...Double Buffer UtilityHi Folks, I've been experimenting with double buffering on a 48k Speccy for a small project I'm working on. After reading lots of good advice here…
... a buffer which is 192 pixel high (deep).
# In this ... ) #Sourxe X position
self.sourceYPos = self.inputValue('Copy from buffer y-position in ...Raycasting (3D Games!) with SpecBAS<div><font face="Arial, Verdana"><span style="font-size: 13.3333330154419px; line-height: normal;">Here's one I wrote just recently. I wanted to see …
... demos archive) read an array from a position that you occupy. If ... br /> Working from left to right for each pixel across the ... work out the angle that pixel is from your (the human's ... SCRh-1 FILL 70 FOR x=0 TO SCRw-180 ... pla90
LET cx=2*x/SCRw-1,rx=px,ry ...Chompston Mazes in SpecBASAfter the discussion in ASH-II's Pacman thread, I checked out the link there about generating 2D Pacman style mazes. This one was quite good fun, …
... FN d:
LET x$=x$+CHR$ x,y$=y$+CHR$ y:
NEXT g:
position inside e$ and store that ... store the number at that position in e$ in a new ... to the x$ and y$ variables, using CHR$ to convert from a number ...
