Differences

This shows you the differences between two versions of the page.

--- base:vic [2014-09-17 23:20] – [Sprites] pixman
+++ base:vic [2019-07-06 02:31] – ftc
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+====== VIC Programming ======
+On this page you find graphics programming information in general, such as how to set up various graphics modes, how to draw on screen, or how to display and move a sprite. If you are looking for information on how to code certain demo effects, you should look in the [[base:demo_programming|Demo Effects]] section instead.
+The general rule of thumb is that //if something is of more general use than just for demo effects, or if it is too simple or restricted to constitute a full demo effect in itself (such as opening the borders or achieving a specific custom screen mode through VIC trickery), you will find it here rather than in the demo coding section.//
+There is also some information related to VIC programming in the [[base:game_programming|Game Coding]] section, and there is some information on 3d math in the [[base:6502_6510_maths|maths]] section.
+===== Basics =====
+  * [[Visible area]] - How much of the overscan area actual monitors actually show
+  * [[Pixel aspect ratio]] - To sum it up, it's 0.9365:1 (X:Y) on PAL
+  * [[magazines:chacking4#introduction_to_the_vic-ii|Introduction to the VIC]] - by Pasi 'Albert' Ojala (from C= Hacking 4).
+  * [[base:memconfig|Memory configuration]] - See the memory configuration section to see how to select VIC bank and where to place sprites etc.
+  * [[base:interrupts|Interrupts and timing]] - See the section on interrupts for information on VIC/raster interrupts.
+  * [[Built in screen modes]] - written and compiled by Oswald/Resource
+  * [[base:spriteintro|Introduction to Sprites]] - written and compiled by Oswald/Resource
+===== Using built in screen modes =====
+  * [[petscii to screencode|Convert ASCII/PETSCII to screencodes]] by Mace/Secure
+  * [[make modified character sets|Applications of modified character sets]]
+  * [[Displaying a picture at $2000|Display a multicolor Koala Picture]] by Richard Bayliss
+  * [[Calculate VIC settings for showing a koala|Generic koala shower (VIC settings calculator)]] by JTR/DMAgic
+===== Sprites =====
+See the general section on how to use sprites. It contains basic usage as well as sprite multiplexers and other things, including (some) demo effects with sprites.
+  * [[base:sprites|Sprites]] - General section on sprites
+===== Drawing on the screen =====
+  * [[Various techniques to calculate adresses fast, common screen formats for pixel graphics]]
+  * [[Rather small and rather fast screen offset component splitter]] - by JackAsser/Instinct
+  * [[Bresenham's line algorithm]] - basic implementation - by Raf/Vulture Design
+  * [[Bresenham's line algorithm 2]] - by Hein
+  * [[Lines]] (bresenham, collecting pixels into one byte, runlength slice) - by Bitbreaker FIXME (slope and sing the SID / CIA for slopes still missing)
+  * [[Filling the vectors]] - by Bitbreaker
+  * [[Dots and Plots]] - by TWW/CTR
+  * [[Bresenham Circle Routine]] - Implementation by Scout
+  * [[Draw RAM to screen or color memory]] - by malcontent
+  * [[4x4 mode and circle routine]] - by malcontent
+=====  VICII Hardware tricks =====
+This section is more about the workings of the VIC chip than about certain demo effects which are //based// on these VIC tricks.
+==== Border ====
+  * Opening upper and lower borders
+    * [[Removing the top/bottom border|Short code]] - by HCL/Booze Design
+    * [[Opening the top/bottom borders|Opening the borders]] - by Richard Bayliss
+    * [[magazines:chacking6#opening_the_borders|The long story]] - by Pasi 'Albert' Ojala (C= Hacking #6)
+    * [[Opening up the borders - a further explanation]] - by TheHighlander
+    * [[base:upper_lower_borders|Opening borders and other things]] - by Karmic/HVSC
+  * [[Sprites in bottom sideborder]] - by Groepaz/Hitmen
+  * [[Removing the sideborders]] - by HCL/Booze Design
+  * [[Displaying graphics using $3fff]]
+==== Screen ====
+=== Vertical Movement ===
+  * [[FLD]] - Flexible Line Distance - by HCL/Booze Design
+  * [[Linecrunch]] - Vertical Screen Positioning
+  * [[Double Screen Vertical Scroller]] - Using simple copy method with double buffer
+  * [[Smooth Linecrunch]] - by Karmic/HVSC/HF
+=== Horizontal Movement ===
+  * [[Horizontal Screen Positioning (HSP)|HSP]] -  Horizontal Screen Positioning (aka Wanker aka DMA-Delay/VSP - Variable Screen Positioning).
+=== Useful Combinations ===
+  * [[AGSP (Any Given Screen Position)|AGSP]] - Any Given Screen Position (VSP and LineCrunch combined)
+  * [[Double Screen Horizontal Scroller|Double Screen Horizontal Scroller]] - Using VSP to display a double bitmap picture (80x25 chars)
+=== Vertical Tweaks ===
+  * [[Introduction to vertical tweaks]]
+  * [[FLD]] - Flexible Line Distance - by HCL/Booze Design
+  * [[FPD]] - Flexible Pixel Distance
+  * [[FPS]] - Flexible Pixel Size (like FPD but stretching pixels)
+  * [[FPP]] - Flexible Pixel Position
+    * [[FPP-last-line|FPP]] - by repeating the last line
+    * [[FPP-first-line|FPP]] - by repeating the first line
+  * [[Repeating char-lines]] - by HCL/Booze Design
+NOTE: The names of above vertical movements are legacy and not always explicative. 'Line' in FLD refers to a char-line of 8 pixels hight. 'Pixel' in FPD etc refers to a single line of graphics.
+==== Sprites ====
+This section about sprites..
+=== Vertical Tweaks ===
+  * [[Stretching sprites]] - using $d017.
+  * [[Sprite FPD]]
+  * [[Sprite FPP]]
+  * [[Sprite-crunching]]
+=== Sprite Tweaks in general ===
+* [[9th Sprite]] code and explanation
+=====  Custom Graphics Modes =====
+This section is for custom graphics modes only, as contrasted to the built in graphics modes with official hardware support, such as hires, multicolor, etc.
+=== Non-tweaked modes ===
+  * [[SH]] - Super Hires
+  * [[Drazlace]]
+    *[[Drazlace displayer|Display Drazlace picture]] - by HCL
+=== Tweaked modes ===
+  * [[FLI]] -  Flexible Line Interlace
+    * [[magazines:chacking4#fli_-_more_color_to_the_screen|FLI]] -  More color to the screen - by Pasi Ojala (C=Hacking #4).
+    * [[FLI displayer]] - by Graham
+    * [[40 Bytes FLI displayer|FLI displayer]] - by Crossbow (only 40 bytes long)
+  * [[Hires FLI]] -  High Resolution FLI
+  * [[IFLI]] - Interlaced FLI
+  * ([[AFLI]] - Advanced FLI)
+  * [[UFLI]] - Underlayer FLI
+  * [[SHFLI]] - Super Hires FLI
+  * [[SHIFLI]] - Super Hires Interlace FLI
+  * [[XFLI]] - EndOfNameSpace :) FLI
+=== Others ===
+  * [[Junk Modes]] - low resolution modes with charsets
+  * [[4x4 FLI chunky mode]]
+====  Editors for the Custom Graphics Modes ====
+See the general section on:
+  * [[GFX Editors and Converters]]
+===== Color info =====
+  * [[VIC-II Color Cheatsheet]] - by Groepaz
+  * [[Commodore VIC-II Color Analysis]] - by Pepto
+  * {{ :base:colfade_v2.pdf | Color fade (color ramps)}} - by Veto
+===== Graphics file formats =====
+  * [[c64 grafix files specs list v0.03|C64 Graphics File Format Specs]] - by Groepaz
+There is also a nice collection of file format info at AAY64:
+  * [[http://unusedino.de/ec64/technical/aay/c64/frmmain.htm]] - Graphics file formats
+===== Various VIC related =====
+  * [[https://ist.uwaterloo.ca/~schepers/MJK/ascii/VIC-Article.txt|VIC-Article]] - The mighty... By Christian Bauer. (external link)
+  * [[http://unusedino.de/ec64/technical/aay/c64/vicmain.htm|VIC register reference at AAY64]] - Very handy online reference. By Ninja/The Dreams
+  * [[Detect VIC Type]] - by Crossbow
+  * [[Detect PAL/NTSC]] - Various routines
+  * [[base:ntsc_pal_differences|NTSC/PAL Differences]] - article from Domination #13 written by Decomp/Style