R_InitFlats

R_InitPlanes Only at game startup.

R_InitPointToAngle

R_InitSkyMap Called whenever the view size changes.

R_InitSpriteDefs Pass a null terminated list of sprite names (4 chars exactly) to be used. Builds the sprite rotation matrixes to account for horizont

R_InitSpriteLumps Finds the width and hoffset of all sprites in the wad, so the sprite does not need to be cached completely just for having the heade

R_InitSprites Called at program start.

R_InitTables

R_InitTextureMapping

R_InitTextures Initializes the texture list with the textures from the world map.

R_InitTranslationTables Creates the translation tables to map the green color ramp to gray, brown, red. Assumes a given structure of the PLAYPAL. Coul

R_MakeSpans

R_ProjectSprite Generates a vissprite for a thing if it might be visible.

RenderBSPNode Renders all subsectors below a given node, traversing subtree recursively. Just call with BSP root.

R_RenderView

R_SetupFrame

Note: as with every ImDrawList drawing function, this expects that the font atlas texture is bound.

This is a not-very-pretty routine which handles the face states and their timing. the precedence of expressions is: dead > evil grin > turned head > s

A fairly efficient way to draw a number based on differences from the old number. Note: worth the trouble?

Initializes sound stuff, including volume Sets SFX and music volume, allocates channel buffer, sets S_sfx lookup.

Stop and resume music, during game PAUSE.

Per level startup code. Kills playing sounds at start of level, determines music if any, changes music.

Updates music & sounds

S_getChannel : If none available, return -1. Otherwise channel #.

Sanitize format - Zero terminate so extra characters after format (e.g. "%f123") don't confuse atof/atoi - stb_sprintf.h supports several new modifier

Save current stack sizes for later compare

Demonstrate old/legacy Columns API! [2020: Columns are under-featured and not maintained. Prefer using the more flexible and powerful BeginTable() API

Demonstrate creating a window which gets auto-resized according to its content.

Demonstrate creating a window with custom resize constraints.

Demonstrate using the low-level ImDrawList to draw custom shapes.

Demonstrate creating a window covering the entire screen/viewport

Demonstrate create a window with multiple child windows.

Demonstrate creating a simple log window with basic filtering.

Demonstrate/test rendering huge amount of text, and the incidence of clipping.

Demonstrate creating a "main" fullscreen menu bar and populating it. Note the difference between BeginMainMenuBar() and BeginMenuBar(): - BeginMenuBar

Demonstrate create a simple property editor.

Demonstrate creating a simple static window with no decoration + a context-menu to choose which corner of the screen to use.

Demonstrate using "##" and "###" in identifiers to manipulate ID generation. This apply to all regular items as well. Read FAQ section "How can I have

Helper