P_SetupLevel

P_SetupPsprites Called at start of level for each player.

P_ShootSpecialLine - IMPACT SPECIALS Called when a thing shoots a special line.

P_SlideMove The momx / momy move is bad, so try to slide along a wall. Find the first line hit, move flush to it, and slide along it This is a kludgy

P_SpawnBlood

Spawn a door that closes after 30 seconds

Spawn a door that opens after 5 minutes

P_SpawnFireFlicker

P_SpawnLightFlash After the map has been loaded, scan each sector for specials that spawn thinkers

P_SpawnMapThing The fields of the mapthing should already be in host byte order.

Parses command line parameters.

P_ThingHeightClip Takes a valid thing and adjusts the thing->floorz, thing->ceilingz, and possibly thing->z. This is called for all nearby monsters wh

P_TouchSpecialThing

P_TraverseIntercepts Returns true if the traverser function returns true for all lines.

P_UnArchivePlayers

P_UnArchiveSpecials

P_UnArchiveThinkers

P_UnArchiveWorld

P_UseLines Looks for special lines in front of the player to activate.

P_ZMovement

R_AddLine Clips the given segment and adds any visible pieces to the line list.

R_AddSprites During BSP traversal, this adds sprites by sector.

R_ClearClipSegs

R_ClearDrawSegs

R_ClearPlanes At begining of frame.

R_ClearSprites Called at frame start.

R_ClipPassWallSegment Clips the given range of columns, but does not includes it in the clip list. Does handle windows, e.g. LineDefs with upper and l

R_ClipSolidWallSegment Does handle solid walls, e.g. single sided LineDefs (middle texture) that entirely block the view.

R_DrawColumnInCache Clip and draw a column from a patch into a cached post.

R_DrawMasked

R_DrawPSprite

R_DrawPlanes At the end of each frame.

R_DrawPlayerSprites

R_DrawSprite

R_GenerateLookup

R_GetColumnRaw Returns raw byte* WAD data with column_t headers intact. Used by R_DrawMaskedColumn for masked/transparent segs which need to parse the

Widen a sprite lump: each byte at offset i becomes wide[i].

R_InitBuffer Creats lookup tables that avoid multiplies and other hazzles for getting the framebuffer address of a pixel to draw.

R_InitData Locates all the lumps that will be used by all views Must be called after W_Init.

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

Widen byte column data to uint32_t and set dc_source.

R_SetupFrame

Reserves amount entries at the end of the array, but does nothing with them.

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 channels, 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