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FAST PIXEL DRAWINGI'm looking for the fastest way to put a pixel to the screen (on spectrum ofcoz:). Here is my own procedure (written in PASMO). But I don't how do it…
... way to put a pixel to the screen (on ...
;============================================================================
; put pixel
; d = x
; e = y
ld a,d ; x / 8
and 11111000b
A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…
... reg for later
; A' = Pixel mask
; H'L' = Screen ... ld a, e
DX1: ; x += xi
call __INCX ; This ... ld a, e
DX2: ; x += xi
call __INCX ; This ...Speccy machine code info where is it?Recently I've been trying to learn Z80 and I've managed to make limited progress (some of my routines even compile now!) but I seem to be having trou…
... makes the connection to pixel coordinates:
X
CCCCCTTT< ... /> BBLLLSSS
Eg, pixel (x,y)=(136,45) is at ... change from x,y coordinates to screen address and pixel mask. Most ... address and B holds the pixel mask for that screen byte:< ...Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... /> ; h = y coord, l = x coord
.flood2
pixel mask
ret nc ; if incoming ...
push bc ; save pixel mask
call fill ; try to ...PLOT and DRAW in machine codeHow do you go about it? If I posted a really simple BASIC instruction could someone do a machine code routine so I could learn from it? I wouldnt k…
... />
17 ; enter: l = pix X 0..255
18 ; h ... we already have pixel mask
rotate: ; else rotate pixel mask right 'b ... address in memory)
X coordinate (pixel 0-255): CCCC CPPP
X and Y coordinates (8-bit ...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…
... /> ; b - y pixel ;
; c - x pixel ;
; de - ... br /> and 0x0F ; mask off where we want to ...line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
...
; ******************************************************************
; Plot pixel at (x,y) coordinate.
; The (0 ... ; in: BC = (y,x) coordinate of pixel
plotpixel ... /> ; in: bc = (y,x) coordinate of pixel
; out: de = ...line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... br /> ;
; Draw a pixel line from (x0,y0) defined ...
; ******************************************************************
; Plot pixel at (x,y) coordinate.
; The (0 ... ; in: BC = (y,x) coordinate of pixel
plotpixel2 ...Speccy machine code info where is it?Recently I've been trying to learn Z80 and I've managed to make limited progress (some of my routines even compile now!) but I seem to be having trou…
... LLLC CCCC
Pixel Coordinates
X: CCCCCTTT 0-255
Character Coordinates
X: 000CCCCC 0-31
Y ...Challenge II: Warcraft: Orcs vs. Humans on the speccyThis should be challenging!
... of scroll,
pixel x pixel
character x character
in ... the screen is moving pixel by pixel and the color is character ...Manic Miner Basic Source?Is there any sinclair basic source for Manic Miner going around on the net? also does anyone have any good guides which can get one started on making…
... lets you move a single pixel(PLOT x,y) around the screen ... , when you have a single pixel moving without leaving trails, add ... in another(uncontrolled) pixel and make the program print ...FPGA Spectrum is aliveMy FPGA Spectrum that I started to work on year ago is in 90% ready. I have fixed DDR controller so I can read from it and write to it. I've run som…
... one Zx Spectrum's pixel there is 2x2 pixel block.
When ... /> OO O - active pixel
OO X - inactive (black pixel)
When ... /> OX O - active pixel
XO X - inactive (black pixel)
Every ...What game font did you like?Carrying over the slight venture into game fonts when it was mentioned how some games didn't have their own font in the "What was the first Spectrum …
... make sense to make every pixel 64 x 64 units and space ... multiples thereof) to have it pixel perfect.
Funny, the ...Introduce yourself[SIZE=3][FONT=Comic Sans MS]This is the thread to stop by & introduce yourself.[/FONT][/SIZE]
... the geometry information into discrete pixel information (X, Y, Z, U, ... is where we processed the pixel to determine whether it ... 3 -
The resultant pixel data was then passed through ... or blending with current screen pixel's colour value.
< ...50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... the edge of the 16x16 pixel blocks. But it does mean ... the background. It doesn't pixel-mask the foreground, so you won ...Super Stick ManBeen thinking about doing a weird platformer for a while now, but since I have zero programming knowledge, and a modicum of drawing skills, I thought…
... stickman might not need a pixel mask, but perhaps some other sprites ...Super Stick ManBeen thinking about doing a weird platformer for a while now, but since I have zero programming knowledge, and a modicum of drawing skills, I thought…
... stickman might not need a pixel mask, but perhaps some other sprites ...Double Dragon Remake: The Development ThreadOk guy's, so this is the new thread that will be focusing on Jim Bagley's development of the Double Dragon remake that was first proposed by myself a…
Yeah, the 1 pixel mask extension would be useful, that' ...Saving space using procedural graphicsAfter spending several hours playing around with various packers to squash the Alien8 test screen$ it occured to me that maybe bigger space savings c…
... context of pixel on [X,Y] by its neighbours at [X-1,Y ... ] [Y-1, X-1] [Y-1, X]. As each pixel can have only ... [X,Y] with given context.
If prediction success the pixel is ...Pixel level collision detection[SIZE=3][FONT=Calibri]I need to do some pixel level collision detection. Assuming I have a byte of my ?player? sprite in DE and a byte of screen to t…
... wonder how you could check pixel perfect collision with masked, background ... where you draw either pixel mask or collision mask.
Fact is ...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…
... br />
; b - y pixel
; c - x pixel
; de - string
; b - y pixel
; c - x pixel
; ret: a character ... ; get screen address and pixel rotation
ld c, ...Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
... ;0 into B; 8 pixel rows x 3 screen thirds into C ...Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
... ;0 into B; 8 pixel rows x 3 screen thirds into C ...Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…
... ...39 Z80 clocks per each pixel set in the main loop ... ! The uni-loops variant with pixel mask would be about twice slower ...Optimal shifting for set pixel?Hi, I'm optimizing my set pixel code. For speed. But without using partitioned memory (i.e. a table on 256 byte boundary) I have optimal memory addr…
... /> I'm optimizing my set pixel code. For speed. But without ... ]
ld a,#x ; symbolic. a is x (0->255)
mask for shifting then this?
Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... up with for xoring a pixel at a given screen coordinate ... />
[code]
;xorpixel(C:x, E:y)
xorpixel:
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 …
... and add offset based on pixel position of ycar
... /> RLA ; double value (include mask)
LD E,A
WRITECHAR:
; C = X, L = B, DE = GFX
X CHAR ACCROSS IN A, EG ...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 …
... add offset based on pixel position of ycar
mask)
LD E,A ...
;GRAPHIC DATA:
;Pixel Size: ( 16, 24)
... X char
;Attributes: No attributes
;Mask: Yes, mask ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... 1- (graphics only) or 2- (mask, graph) byte definitions. Note that ... the (mask,graph) pairs are in a ... , all minor variations on MASK,OR,XOR,LOAD but offering ... These indicate the minimum pixel rotation in the x and y directions ...Getting attribute location from a screen coordinates (x,y)I am having trouble figuring out how to convert an x,y coordinate pair (pointing to a specific pixel) to the location of the attribute for the block …
... convert an x,y coordinate pair (pointing to a specific pixel) to ... the block that contains that pixel.
I searched on ...
