Merge branch 'terrain-lump' into 'master'

TERRAIN lump

See merge request KartKrew/Kart!480

src/Sourcefile

@@ -111,4 +111,5 @@ k_botitem.c
 k_botsearch.c
 k_grandprix.c
 k_hud.c
+k_terrain.c
 k_brightmap.c

src/k_kart.c

@@ -33,6 +33,7 @@
 #include "k_waypoint.h"
 #include "k_bot.h"
 #include "k_hud.h"
+#include "k_terrain.h"
 
 // SOME IMPORTANT VARIABLES DEFINED IN DOOMDEF.H:
 // gamespeed is cc (0 for easy, 1 for normal, 2 for hard)
@@ -1605,6 +1606,7 @@ static UINT8 K_CheckOffroadCollide(mobj_t *mo)
 
 		}
 	}
+
 	return 0;	// couldn't find any offroad
 }
 
@@ -1616,7 +1618,17 @@ static UINT8 K_CheckOffroadCollide(mobj_t *mo)
 */
 static void K_UpdateOffroad(player_t *player)
 {
-	fixed_t offroadstrength = (K_CheckOffroadCollide(player->mo) << FRACBITS);
+	terrain_t *terrain = player->mo->terrain;
+	fixed_t offroadstrength = 0;
+
+	if (terrain != NULL && terrain->offroad > 0)
+	{
+		offroadstrength = (terrain->offroad << FRACBITS);
+	}
+	else
+	{
+		offroadstrength = (K_CheckOffroadCollide(player->mo) << FRACBITS);
+	}
 
 	// If you are in offroad, a timer starts.
 	if (offroadstrength)
@@ -4345,7 +4357,7 @@ void K_SpawnSparkleTrail(mobj_t *mo)
 	sparkle->color = mo->color;
 }
 
-void K_SpawnWipeoutTrail(mobj_t *mo, boolean offroad)
+void K_SpawnWipeoutTrail(mobj_t *mo)
 {
 	mobj_t *dust;
 	angle_t aoff;
@@ -4372,13 +4384,6 @@ void K_SpawnWipeoutTrail(mobj_t *mo, boolean offroad)
 	dust->destscale = mo->scale;
 	P_SetScale(dust, mo->scale);
 	K_FlipFromObject(dust, mo);
-
-	if (offroad) // offroad effect
-	{
-		dust->momx = mo->momx/2;
-		dust->momy = mo->momy/2;
-		dust->momz = P_GetMobjZMovement(mo)/2;
-	}
 }
 
 void K_SpawnDraftDust(mobj_t *mo)
@@ -5074,7 +5079,7 @@ void K_DoSneaker(player_t *player, INT32 type)
 {
 	const fixed_t intendedboost = FRACUNIT/2;
 
-	if (!player->floorboost || player->floorboost == 3)
+	if (player->floorboost == 0 || player->floorboost == 3)
 	{
 		const sfxenum_t normalsfx = sfx_cdfm01;
 		const sfxenum_t smallsfx = sfx_cdfm40;
@@ -5097,7 +5102,7 @@ void K_DoSneaker(player_t *player, INT32 type)
 		player->numsneakers++;
 	}
 
-	if (!player->sneakertimer)
+	if (player->sneakertimer == 0)
 	{
 		if (type == 2)
 		{
@@ -5131,13 +5136,12 @@ void K_DoSneaker(player_t *player, INT32 type)
 	{
 		player->pflags |= PF_ATTACKDOWN;
 		K_PlayBoostTaunt(player->mo);
-
 	}
 
 	player->sneakertimer = sneakertime;
 
 	// set angle for spun out players:
-	player->boostangle = (INT32)player->mo->angle;
+	player->boostangle = player->mo->angle;
 }
 
 static void K_DoShrink(player_t *user)
@@ -5219,6 +5223,7 @@ void K_DoPogoSpring(mobj_t *mo, fixed_t vertispeed, UINT8 sound)
 		return;
 
 	mo->standingslope = NULL;
+	mo->terrain = NULL;
 
 	mo->eflags |= MFE_SPRUNG;
 
@@ -6662,7 +6667,7 @@ void K_KartPlayerThink(player_t *player, ticcmd_t *cmd)
 
 	// update boost angle if not spun out
 	if (!player->spinouttimer && !player->wipeoutslow)
-		player->boostangle = (INT32)player->mo->angle;
+		player->boostangle = player->mo->angle;
 
 	K_GetKartBoostPower(player);
 
@@ -6710,16 +6715,11 @@ void K_KartPlayerThink(player_t *player, ticcmd_t *cmd)
 					ghost->renderflags |= RF_DONTDRAW;
 			}
 
+			// Could probably be moved somewhere else.
+			K_HandleFootstepParticles(player->mo);
+
 			if (P_IsObjectOnGround(player->mo))
 			{
-				// Offroad dust
-				if (player->boostpower < FRACUNIT)
-				{
-					K_SpawnWipeoutTrail(player->mo, true);
-					if (leveltime % 6 == 0)
-						S_StartSound(player->mo, sfx_cdfm70);
-				}
-
 				// Draft dust
 				if (player->draftpower >= FRACUNIT)
 				{
@@ -6935,7 +6935,7 @@ void K_KartPlayerThink(player_t *player, ticcmd_t *cmd)
 	if (player->sneakertimer && player->wipeoutslow > 0 && player->wipeoutslow < wipeoutslowtime+1)
 		player->wipeoutslow = wipeoutslowtime+1;
 
-	if (player->floorboost)
+	if (player->floorboost > 0)
 		player->floorboost--;
 
 	if (player->driftboost)

src/k_kart.h

@@ -76,7 +76,7 @@ void K_RunFinishLineBeam(void);
 UINT16 K_DriftSparkColor(player_t *player, INT32 charge);
 void K_SpawnBoostTrail(player_t *player);
 void K_SpawnSparkleTrail(mobj_t *mo);
-void K_SpawnWipeoutTrail(mobj_t *mo, boolean offroad);
+void K_SpawnWipeoutTrail(mobj_t *mo);
 void K_SpawnDraftDust(mobj_t *mo);
 void K_DriftDustHandling(mobj_t *spawner);
 void K_Squish(mobj_t *mo);

src/k_terrain.h

@@ -0,0 +1,459 @@
+// DR. ROBOTNIK'S RING RACERS
+//-----------------------------------------------------------------------------
+// Copyright (C) 1998-2021 by ZDoom + GZDoom teams, and contributors
+// Copyright (C) 2021 by Sally "TehRealSalt" Cochenour
+// Copyright (C) 2021 by Kart Krew
+//
+// This program is free software distributed under the
+// terms of the GNU General Public License, version 2.
+// See the 'LICENSE' file for more details.
+//-----------------------------------------------------------------------------
+/// \file  k_terrain.h
+/// \brief Implementation of a TERRAIN-style lump for DRRR, ala GZDoom's codebase.
+
+#ifndef __K_TERRAIN_H__
+#define __K_TERRAIN_H__
+
+#include "doomdata.h"
+#include "doomdef.h"
+#include "doomtype.h"
+#include "m_fixed.h"
+#include "p_mobj.h"
+
+#define TERRAIN_NAME_LEN 32
+
+typedef struct t_splash_s
+{
+	// Splash definition.
+	// These are particles spawned when hitting the floor.
+
+	char name[TERRAIN_NAME_LEN];	// Lookup name.
+
+	UINT16 mobjType;		// Thing type. MT_NULL to not spawn anything.
+	UINT16 sfx;				// Sound to play.
+	fixed_t scale;			// Thing scale multiplier.
+	UINT16 color;			// Colorize effect. SKINCOLOR_NONE has no colorize.
+
+	fixed_t pushH;			// Push-out horizontal multiplier.
+	fixed_t pushV;			// Push-out vertical multiplier.
+	fixed_t spread;			// Randomized spread distance.
+	angle_t cone;			// Randomized angle of the push-out.
+
+	UINT8 numParticles;		// Number of particles to spawn.
+} t_splash_t;
+
+typedef struct t_footstep_s
+{
+	// Footstep definition.
+	// These are particles spawned when moving fast enough on a floor.
+
+	char name[TERRAIN_NAME_LEN];	// Lookup name.
+
+	UINT16 mobjType;		// Thing type. MT_NULL to not spawn anything.
+	UINT16 sfx;				// Sound to play.
+	fixed_t scale;			// Thing scale multiplier.
+	UINT16 color;			// Colorize effect. SKINCOLOR_NONE has no colorize.
+
+	fixed_t pushH;			// Push-out horizontal multiplier.
+	fixed_t pushV;			// Push-out vertical multiplier.
+	fixed_t spread;			// Randomized spread distance.
+	angle_t cone;			// Randomized angle of the push-out.
+
+	tic_t sfxFreq;			// How frequently to play the sound.
+	tic_t frequency;		// How frequently to spawn the particles.
+	fixed_t requiredSpeed;	// Speed percentage you need to be at to trigger the particles.
+} t_footstep_t;
+
+typedef enum
+{
+	// Terrain flag values.
+	TRF_LIQUID = 1, // Texture water properties (wavy, slippery, etc)
+	TRF_SNEAKERPANEL = 1<<1, // Texture is a booster
+	TRF_STAIRJANK = 1<<2, // Texture is bumpy road
+	TRF_TRIPWIRE = 1<<3 // Texture is a tripwire when used as a midtexture
+} terrain_flags_t;
+
+typedef struct terrain_s
+{
+	// Terrain definition.
+	// These are all of the properties that the floor gets.
+
+	char name[TERRAIN_NAME_LEN];	// Lookup name.
+
+	size_t splashID;		// Splash defintion ID.
+	size_t footstepID;		// Footstep defintion ID.
+
+	fixed_t friction;		// The default friction of this texture.
+	UINT8 offroad;			// The default offroad level of this texture.
+	INT16 damageType;		// The default damage type of this texture. (Negative means no damage).
+	UINT8 trickPanel;		// Trick panel strength
+	UINT32 flags;			// Flag values (see: terrain_flags_t)
+} terrain_t;
+
+typedef struct t_floor_s
+{
+	// Terrain floor definition.
+	// Ties texture names to a .
+
+	// (Could be optimized by using texture IDs instead of names,
+	// but was concerned because I recall sooomething about those not being netsafe?
+	// Someone confirm if I just hallucinated that. :V)
+
+	char textureName[9];	// Floor texture name.
+	size_t terrainID;		// Terrain definition ID.
+} t_floor_t;
+
+/*--------------------------------------------------
+	size_t K_GetSplashHeapIndex(t_splash_t *splash);
+
+		Returns a splash defintion's index in the
+		splash definition heap.
+
+	Input Arguments:-
+		splash - The splash definition to return the index of.
+
+	Return:-
+		The splash heap index, SIZE_MAX if the splash was invalid.
+--------------------------------------------------*/
+
+size_t K_GetSplashHeapIndex(t_splash_t *splash);
+
+
+/*--------------------------------------------------
+	size_t K_GetNumSplashDefs(void);
+
+		Returns the number of splash definitions.
+
+	Input Arguments:-
+		None
+
+	Return:-
+		Length of splashDefs.
+--------------------------------------------------*/
+
+size_t K_GetNumSplashDefs(void);
+
+
+/*--------------------------------------------------
+	t_splash_t *K_GetSplashByIndex(size_t checkIndex);
+
+		Retrieves a splash definition by its heap index.
+
+	Input Arguments:-
+		checkIndex - The heap index to retrieve.
+
+	Return:-
+		The splash definition, NULL if it didn't exist.
+--------------------------------------------------*/
+
+t_splash_t *K_GetSplashByIndex(size_t checkIndex);
+
+
+/*--------------------------------------------------
+	t_splash_t *K_GetSplashByName(const char *checkName);
+
+		Retrieves a splash definition by its lookup name.
+
+	Input Arguments:-
+		checkName - The lookup name to retrieve.
+
+	Return:-
+		The splash definition, NULL if it didn't exist.
+--------------------------------------------------*/
+
+t_splash_t *K_GetSplashByName(const char *checkName);
+
+
+/*--------------------------------------------------
+	size_t K_GetFootstepHeapIndex(t_footstep_t *footstep);
+
+		Returns a footstep defintion's index in the
+		footstep definition heap.
+
+	Input Arguments:-
+		footstep - The footstep definition to return the index of.
+
+	Return:-
+		The footstep heap index, SIZE_MAX if the footstep was invalid.
+--------------------------------------------------*/
+
+size_t K_GetFootstepHeapIndex(t_footstep_t *footstep);
+
+
+/*--------------------------------------------------
+	size_t K_GetNumFootstepDefs(void);
+
+		Returns the number of footstep definitions.
+
+	Input Arguments:-
+		None
+
+	Return:-
+		Length of footstepDefs.
+--------------------------------------------------*/
+
+size_t K_GetNumFootstepDefs(void);
+
+
+/*--------------------------------------------------
+	t_footstep_t *K_GetFootstepByIndex(size_t checkIndex);
+
+		Retrieves a footstep definition by its heap index.
+
+	Input Arguments:-
+		checkIndex - The heap index to retrieve.
+
+	Return:-
+		The footstep definition, NULL if it didn't exist.
+--------------------------------------------------*/
+
+t_footstep_t *K_GetFootstepByIndex(size_t checkIndex);
+
+
+/*--------------------------------------------------
+	t_footstep_t *K_GetFootstepByName(const char *checkName);
+
+		Retrieves a footstep definition by its lookup name.
+
+	Input Arguments:-
+		checkName - The lookup name to retrieve.
+
+	Return:-
+		The footstep definition, NULL if it didn't exist.
+--------------------------------------------------*/
+
+t_footstep_t *K_GetFootstepByName(const char *checkName);
+
+
+/*--------------------------------------------------
+	size_t K_GetTerrainHeapIndex(terrain_t *terrain);
+
+		Returns a terrain defintion's index in the
+		terrain definition heap.
+
+	Input Arguments:-
+		terrain - The terrain definition to return the index of.
+
+	Return:-
+		The terrain heap index, SIZE_MAX if the terrain was invalid.
+--------------------------------------------------*/
+
+size_t K_GetTerrainHeapIndex(terrain_t *terrain);
+
+
+/*--------------------------------------------------
+	size_t K_GetNumTerrainDefs(void);
+
+		Returns the number of terrain definitions.
+
+	Input Arguments:-
+		None
+
+	Return:-
+		Length of terrainDefs.
+--------------------------------------------------*/
+
+size_t K_GetNumTerrainDefs(void);
+
+
+/*--------------------------------------------------
+	terrain_t *K_GetTerrainByIndex(size_t checkIndex);
+
+		Retrieves a terrain definition by its heap index.
+
+	Input Arguments:-
+		checkIndex - The heap index to retrieve.
+
+	Return:-
+		The terrain definition, NULL if it didn't exist.
+--------------------------------------------------*/
+
+terrain_t *K_GetTerrainByIndex(size_t checkIndex);
+
+
+/*--------------------------------------------------
+	terrain_t *K_GetTerrainByName(const char *checkName);
+
+		Retrieves a terrain definition by its lookup name.
+
+	Input Arguments:-
+		checkName - The lookup name to retrieve.
+
+	Return:-
+		The terrain definition, NULL if it didn't exist.
+--------------------------------------------------*/
+
+terrain_t *K_GetTerrainByName(const char *checkName);
+
+/*--------------------------------------------------
+	terrain_t *K_GetDefaultTerrain(void);
+
+		Returns the default terrain definition, used
+		in cases where terrain is not set for a texture.
+
+	Input Arguments:-
+		None
+
+	Return:-
+		The default terrain definition, NULL if it didn't exist.
+--------------------------------------------------*/
+
+terrain_t *K_GetDefaultTerrain(void);
+
+
+/*--------------------------------------------------
+	terrain_t *K_GetTerrainForTextureName(const char *checkName);
+
+		Returns the terrain definition applied to
+		the texture name inputted.
+
+	Input Arguments:-
+		checkName - The texture's name.
+
+	Return:-
+		The texture's terrain definition if it exists,
+		otherwise the default terrain if it exists,
+		otherwise NULL.
+--------------------------------------------------*/
+
+terrain_t *K_GetTerrainForTextureName(const char *checkName);
+
+
+/*--------------------------------------------------
+	terrain_t *K_GetTerrainForTextureNum(INT32 textureNum);
+
+		Returns the terrain definition applied to
+		the texture ID inputted.
+
+	Input Arguments:-
+		textureNum - The texture's ID.
+
+	Return:-
+		The texture's terrain definition if it exists,
+		otherwise the default terrain if it exists,
+		otherwise NULL.
+--------------------------------------------------*/
+
+terrain_t *K_GetTerrainForTextureNum(INT32 textureNum);
+
+
+/*--------------------------------------------------
+	terrain_t *K_GetTerrainForFlatNum(INT32 flatID);
+
+		Returns the terrain definition applied to
+		the level flat ID.
+
+	Input Arguments:-
+		flatID - The level flat's ID.
+
+	Return:-
+		The level flat's terrain definition if it exists,
+		otherwise the default terrain if it exists,
+		otherwise NULL.
+--------------------------------------------------*/
+
+terrain_t *K_GetTerrainForFlatNum(INT32 flatID);
+
+
+/*--------------------------------------------------
+	void K_UpdateMobjTerrain(mobj_t *mo, INT32 flatID);
+
+		Updates an object's terrain pointer, based on
+		the level flat ID supplied. Intended to be called
+		when the object moves to new floors.
+
+	Input Arguments:-
+		mo - The object to update.
+		flatID - The level flat ID the object is standing on.
+
+	Return:-
+		None
+--------------------------------------------------*/
+
+void K_UpdateMobjTerrain(mobj_t *mo, INT32 flatID);
+
+
+/*--------------------------------------------------
+	void K_ProcessTerrainEffect(mobj_t *mo);
+
+		Handles applying terrain effects to the object,
+		intended to be called in a thinker.
+
+		Currently only intended for players, but
+		could be modified to be inclusive of all
+		object types.
+
+	Input Arguments:-
+		mo - The object to apply effects to.
+
+	Return:-
+		None
+--------------------------------------------------*/
+
+void K_ProcessTerrainEffect(mobj_t *mo);
+
+
+/*--------------------------------------------------
+	void K_SetDefaultFriction(mobj_t *mo);
+
+		Resets an object to their default friction values.
+		If they are on terrain with different friction,
+		they will update to that value.
+
+	Input Arguments:-
+		mo - The object to reset the friction values of.
+
+	Return:-
+		None
+--------------------------------------------------*/
+
+void K_SetDefaultFriction(mobj_t *mo);
+
+
+/*--------------------------------------------------
+	void K_SpawnSplashForMobj(mobj_t *mo, fixed_t impact);
+
+		Spawns the splash particles for an object's
+		terrain type. Intended to be called when hitting a floor.
+
+	Input Arguments:-
+		mo - The object to spawn a splash for.
+
+	Return:-
+		None
+--------------------------------------------------*/
+void K_SpawnSplashForMobj(mobj_t *mo, fixed_t impact);
+
+
+/*--------------------------------------------------
+	void K_HandleFootstepParticles(mobj_t *mo);
+
+		Spawns the footstep particles for an object's
+		terrain type. Intended to be called every tic.
+
+	Input Arguments:-
+		mo - The object to spawn footsteps for.
+
+	Return:-
+		None
+--------------------------------------------------*/
+
+void K_HandleFootstepParticles(mobj_t *mo);
+
+
+/*--------------------------------------------------
+	void K_InitTerrain(UINT16 wadNum);
+
+		Finds the TERRAIN lumps in a WAD/PK3, and
+		processes all of them.
+
+	Input Arguments:-
+		wadNum - WAD file ID to process.
+
+	Return:-
+		None
+--------------------------------------------------*/
+
+void K_InitTerrain(UINT16 wadNum);
+
+#endif // __K_TERRAIN_H__

src/lua_baselib.c

@@ -3624,11 +3624,10 @@ static int lib_kSpawnSparkleTrail(lua_State *L)
 static int lib_kSpawnWipeoutTrail(lua_State *L)
 {
 	mobj_t *mo = *((mobj_t **)luaL_checkudata(L, 1, META_MOBJ));
-	boolean offroad = lua_optboolean(L, 2);
 	NOHUD
 	if (!mo)
 		return LUA_ErrInvalid(L, "mobj_t");
-	K_SpawnWipeoutTrail(mo, offroad);
+	K_SpawnWipeoutTrail(mo);
 	return 0;
 }
 

src/lua_mobjlib.c

@@ -494,9 +494,6 @@ static int mobj_set(lua_State *L)
 	if (hook_cmd_running)
 		return luaL_error(L, "Do not alter mobj_t in CMD building code!");
 
-	if (hook_cmd_running)
-		return luaL_error(L, "Do not alter mobj_t in BuildCMD code!");
-
 	switch(field)
 	{
 	case mobj_valid:

src/lua_playerlib.c

@@ -281,7 +281,7 @@ static int player_get(lua_State *L)
 	else if (fastcmp(field,"handleboost"))
 		lua_pushinteger(L, plr->handleboost);
 	else if (fastcmp(field,"boostangle"))
-		lua_pushinteger(L, plr->boostangle);
+		lua_pushangle(L, plr->boostangle);
 	else if (fastcmp(field,"draftpower"))
 		lua_pushinteger(L, plr->draftpower);
 	else if (fastcmp(field,"draftleeway"))
@@ -499,9 +499,6 @@ static int player_set(lua_State *L)
 	if (hook_cmd_running)
 		return luaL_error(L, "Do not alter player_t in CMD building code!");
 
-	if (hook_cmd_running)
-		return luaL_error(L, "Do not alter player_t in BuildCMD code!");
-
 	if (fastcmp(field,"mo")) {
 		mobj_t *newmo = *((mobj_t **)luaL_checkudata(L, 3, META_MOBJ));
 		plr->mo->player = NULL; // remove player pointer from old mobj
@@ -626,7 +623,7 @@ static int player_set(lua_State *L)
 	else if (fastcmp(field,"handleboost"))
 		plr->handleboost = luaL_checkinteger(L, 3);
 	else if (fastcmp(field,"boostangle"))
-		plr->boostangle = luaL_checkinteger(L, 3);
+		plr->boostangle = luaL_checkangle(L, 3);
 	else if (fastcmp(field,"draftpower"))
 		plr->draftpower = luaL_checkinteger(L, 3);
 	else if (fastcmp(field,"draftleeway"))
@@ -861,7 +858,7 @@ static int karthud_set(lua_State *L)
 	if (hud_running)
 		return luaL_error(L, "Do not alter player_t in HUD rendering code!");
 	if (hook_cmd_running)
-		return luaL_error(L, "Do not alter player_t in BuildCMD code!");
+		return luaL_error(L, "Do not alter player_t in CMD building code!");
 	karthud[ks] = i;
 	return 0;
 }

src/p_inter.c

@@ -1054,6 +1054,7 @@ void P_KillMobj(mobj_t *target, mobj_t *inflictor, mobj_t *source, UINT8 damaget
 		target->flags |= MF_NOBLOCKMAP|MF_NOCLIP|MF_NOCLIPHEIGHT|MF_NOGRAVITY;
 		P_SetThingPosition(target);
 		target->standingslope = NULL;
+		target->terrain = NULL;
 		target->pmomz = 0;
 
 		target->player->playerstate = PST_DEAD;

src/p_local.h

@@ -168,7 +168,7 @@ boolean P_IsObjectOnGroundIn(mobj_t *mo, sector_t *sec);
 boolean P_IsObjectOnRealGround(mobj_t *mo, sector_t *sec); // SRB2Kart
 #define P_IsObjectFlipped(o) ((o)->eflags & MFE_VERTICALFLIP)
 boolean P_InQuicksand(mobj_t *mo);
-boolean P_PlayerHitFloor(player_t *player, boolean dorollstuff);
+boolean P_PlayerHitFloor(player_t *player, boolean fromAir);
 
 void P_SetObjectMomZ(mobj_t *mo, fixed_t value, boolean relative);
 void P_RestoreMusic(player_t *player);
@@ -385,6 +385,7 @@ extern camera_t *mapcampointer;
 extern fixed_t tmx;
 extern fixed_t tmy;
 extern pslope_t *tmfloorslope, *tmceilingslope;
+extern INT32 tmfloorpic, tmceilingpic;
 
 /* cphipps 2004/08/30 */
 extern void P_MapStart(void);

src/p_map.c

@@ -24,12 +24,13 @@
 #include "r_sky.h"
 #include "s_sound.h"
 #include "w_wad.h"
+
 #include "k_kart.h" // SRB2kart 011617
 #include "k_collide.h"
 #include "k_respawn.h"
-
 #include "hu_stuff.h" // SRB2kart
 #include "i_system.h" // SRB2kart
+#include "k_terrain.h"
 
 #include "r_splats.h"
 
@@ -60,6 +61,7 @@ mobj_t *tmfloorthing; // the thing corresponding to tmfloorz or NULL if tmfloorz
 mobj_t *tmhitthing; // the solid thing you bumped into (for collisions)
 ffloor_t *tmfloorrover, *tmceilingrover;
 pslope_t *tmfloorslope, *tmceilingslope;
+INT32 tmfloorpic, tmceilingpic;
 static fixed_t tmfloorstep;
 static fixed_t tmceilingstep;
 
@@ -325,6 +327,7 @@ boolean P_DoSpring(mobj_t *spring, mobj_t *object)
 	}
 
 	object->standingslope = NULL; // Okay, now we know it's not going to be relevant - no launching off at silly angles for you.
+	object->terrain = NULL;
 
 	object->eflags |= MFE_SPRUNG; // apply this flag asap!
 	spring->flags &= ~(MF_SOLID|MF_SPECIAL); // De-solidify
@@ -466,6 +469,7 @@ static void P_DoFanAndGasJet(mobj_t *spring, mobj_t *object)
 	}
 
 	object->standingslope = NULL; // No launching off at silly angles for you.
+	object->terrain = NULL;
 
 	switch (spring->type)
 	{
@@ -1452,6 +1456,7 @@ static boolean PIT_CheckThing(mobj_t *thing)
 					tmfloorz = thing->z + thing->height;
 					tmfloorrover = NULL;
 					tmfloorslope = NULL;
+					tmfloorpic = -1;
 				}
 				return true;
 			}
@@ -1471,6 +1476,7 @@ static boolean PIT_CheckThing(mobj_t *thing)
 				tmfloorz = tmceilingz = topz; // block while in air
 				tmceilingrover = NULL;
 				tmceilingslope = NULL;
+				tmceilingpic = -1;
 				tmfloorthing = thing; // needed for side collision
 			}
 			else if (topz < tmceilingz && tmthing->z <= thing->z+thing->height)
@@ -1478,6 +1484,7 @@ static boolean PIT_CheckThing(mobj_t *thing)
 				tmceilingz = topz;
 				tmceilingrover = NULL;
 				tmceilingslope = NULL;
+				tmceilingpic = -1;
 				tmfloorthing = thing; // thing we may stand on
 			}
 		}
@@ -1493,6 +1500,7 @@ static boolean PIT_CheckThing(mobj_t *thing)
 					tmceilingz = thing->z;
 					tmceilingrover = NULL;
 					tmceilingslope = NULL;
+					tmceilingpic = -1;
 				}
 				return true;
 			}
@@ -1512,6 +1520,7 @@ static boolean PIT_CheckThing(mobj_t *thing)
 				tmfloorz = tmceilingz = topz; // block while in air
 				tmfloorrover = NULL;
 				tmfloorslope = NULL;
+				tmfloorpic = -1;
 				tmfloorthing = thing; // needed for side collision
 			}
 			else if (topz > tmfloorz && tmthing->z+tmthing->height >= thing->z)
@@ -1519,6 +1528,7 @@ static boolean PIT_CheckThing(mobj_t *thing)
 				tmfloorz = topz;
 				tmfloorrover = NULL;
 				tmfloorslope = NULL;
+				tmfloorpic = -1;
 				tmfloorthing = thing; // thing we may stand on
 			}
 		}
@@ -1698,6 +1708,7 @@ static boolean PIT_CheckLine(line_t *ld)
 		ceilingline = ld;
 		tmceilingrover = openceilingrover;
 		tmceilingslope = opentopslope;
+		tmceilingpic = opentoppic;
 		tmceilingstep = openceilingstep;
 		if (thingtop == tmthing->ceilingz)
 		{
@@ -1710,6 +1721,7 @@ static boolean PIT_CheckLine(line_t *ld)
 		tmfloorz = openbottom;
 		tmfloorrover = openfloorrover;
 		tmfloorslope = openbottomslope;
+		tmfloorpic = openbottompic;
 		tmfloorstep = openfloorstep;
 		if (tmthing->z == tmthing->floorz)
 		{
@@ -1806,6 +1818,8 @@ boolean P_CheckPosition(mobj_t *thing, fixed_t x, fixed_t y)
 	tmceilingrover = NULL;
 	tmfloorslope = newsubsec->sector->f_slope;
 	tmceilingslope = newsubsec->sector->c_slope;
+	tmfloorpic = newsubsec->sector->floorpic;
+	tmceilingpic = newsubsec->sector->ceilingpic;
 
 	tmfloorstep = 0;
 	tmceilingstep = 0;
@@ -1859,6 +1873,7 @@ boolean P_CheckPosition(mobj_t *thing, fixed_t x, fixed_t y)
 							tmfloorz = topheight - sinklevel;
 							tmfloorrover = rover;
 							tmfloorslope = *rover->t_slope;
+							tmfloorpic = *rover->toppic;
 						}
 					}
 					else if (thing->eflags & MFE_VERTICALFLIP && thingtop <= bottomheight + sinklevel && thing->momz >= 0)
@@ -1867,6 +1882,7 @@ boolean P_CheckPosition(mobj_t *thing, fixed_t x, fixed_t y)
 							tmceilingz = bottomheight + sinklevel;
 							tmceilingrover = rover;
 							tmceilingslope = *rover->b_slope;
+							tmceilingpic = *rover->bottompic;
 						}
 					}
 				}
@@ -1890,6 +1906,7 @@ boolean P_CheckPosition(mobj_t *thing, fixed_t x, fixed_t y)
 						tmfloorz = thing->z;
 						tmfloorrover = rover;
 						tmfloorslope = NULL;
+						tmfloorpic = *rover->toppic;
 					}
 				}
 				// Quicksand blocks never change heights otherwise.
@@ -1907,6 +1924,7 @@ boolean P_CheckPosition(mobj_t *thing, fixed_t x, fixed_t y)
 				tmfloorz = tmdropoffz = topheight;
 				tmfloorrover = rover;
 				tmfloorslope = *rover->t_slope;
+				tmfloorpic = *rover->toppic;
 			}
 			if (bottomheight < tmceilingz && abs(delta1) >= abs(delta2)
 				&& !(rover->flags & FF_PLATFORM)
@@ -1915,6 +1933,7 @@ boolean P_CheckPosition(mobj_t *thing, fixed_t x, fixed_t y)
 				tmceilingz = tmdrpoffceilz = bottomheight;
 				tmceilingrover = rover;
 				tmceilingslope = *rover->b_slope;
+				tmceilingpic = *rover->bottompic;
 			}
 		}
 	}
@@ -1989,12 +2008,14 @@ boolean P_CheckPosition(mobj_t *thing, fixed_t x, fixed_t y)
 							tmfloorz = tmdropoffz = polytop;
 							tmfloorslope = NULL;
 							tmfloorrover = NULL;
+							tmfloorpic = polysec->ceilingpic;
 						}
 
 						if (polybottom < tmceilingz && abs(delta1) >= abs(delta2)) {
 							tmceilingz = tmdrpoffceilz = polybottom;
 							tmceilingslope = NULL;
 							tmceilingrover = NULL;
+							tmceilingpic = polysec->floorpic;
 						}
 					}
 					plink = (polymaplink_t *)(plink->link.next);
@@ -2412,6 +2433,8 @@ boolean PIT_PushableMoved(mobj_t *thing)
 		ffloor_t *oldceilrover = tmceilingrover;
 		pslope_t *oldfslope = tmfloorslope;
 		pslope_t *oldcslope = tmceilingslope;
+		INT32 oldfpic = tmfloorpic;
+		INT32 oldcpic = tmceilingpic;
 
 		// Move the player
 		P_TryMove(thing, thing->x+stand->momx, thing->y+stand->momy, true);
@@ -2428,6 +2451,8 @@ boolean PIT_PushableMoved(mobj_t *thing)
 		tmceilingrover = oldceilrover;
 		tmfloorslope = oldfslope;
 		tmceilingslope = oldcslope;
+		tmfloorpic = oldfpic;
+		tmceilingpic = oldcpic;
 		thing->momz = stand->momz;
 	}
 	else
@@ -2677,9 +2702,14 @@ boolean P_TryMove(mobj_t *thing, fixed_t x, fixed_t y, boolean allowdropoff)
 	if (!(thing->flags & MF_NOCLIPHEIGHT))
 	{
 		// Assign thing's standingslope if needed
-		if (thing->z <= tmfloorz && !(thing->eflags & MFE_VERTICALFLIP)) {
+		if (thing->z <= tmfloorz && !(thing->eflags & MFE_VERTICALFLIP))
+		{
+			K_UpdateMobjTerrain(thing, tmfloorpic);
+
 			if (!startingonground && tmfloorslope)
+			{
 				P_HandleSlopeLanding(thing, tmfloorslope);
+			}
 
 			if (thing->momz <= 0)
 			{
@@ -2687,12 +2717,19 @@ boolean P_TryMove(mobj_t *thing, fixed_t x, fixed_t y, boolean allowdropoff)
 				P_SetPitchRollFromSlope(thing, thing->standingslope);
 
 				if (thing->momz == 0 && thing->player && !startingonground)
+				{
 					P_PlayerHitFloor(thing->player, true);
 				}
 			}
-		else if (thing->z+thing->height >= tmceilingz && (thing->eflags & MFE_VERTICALFLIP)) {
+		}
+		else if (thing->z+thing->height >= tmceilingz && (thing->eflags & MFE_VERTICALFLIP))
+		{
+			K_UpdateMobjTerrain(thing, tmceilingpic);
+
 			if (!startingonground && tmceilingslope)
+			{
 				P_HandleSlopeLanding(thing, tmceilingslope);
+			}
 
 			if (thing->momz >= 0)
 			{
@@ -2700,12 +2737,18 @@ boolean P_TryMove(mobj_t *thing, fixed_t x, fixed_t y, boolean allowdropoff)
 				P_SetPitchRollFromSlope(thing, thing->standingslope);
 
 				if (thing->momz == 0 && thing->player && !startingonground)
+				{
 					P_PlayerHitFloor(thing->player, true);
 				}
 			}
 		}
-	else // don't set standingslope if you're not going to clip against it
+	}
+	else
+	{
+		// don't set standingslope if you're not going to clip against it
 		thing->standingslope = NULL;
+		thing->terrain = NULL;
+	}
 
 	/* FIXME: slope step down (even up) has some false
 		positives, so just ignore them entirely. */

src/p_maputl.c

@@ -342,6 +342,7 @@ fixed_t openceilingstep;
 fixed_t openceilingdrop;
 fixed_t openfloorstep;
 fixed_t openfloordrop;
+INT32 opentoppic, openbottompic;
 
 // P_CameraLineOpening
 // P_LineOpening, but for camera
@@ -537,6 +538,7 @@ void P_LineOpening(line_t *linedef, mobj_t *mobj)
 		highceiling = INT32_MIN;
 		lowfloor = INT32_MAX;
 		opentopslope = openbottomslope = NULL;
+		opentoppic = openbottompic = -1;
 		openceilingstep = 0;
 		openceilingdrop = 0;
 		openfloorstep = 0;
@@ -556,6 +558,7 @@ void P_LineOpening(line_t *linedef, mobj_t *mobj)
 		opentop      = height[lo];
 		highceiling  = height[hi];
 		opentopslope = sector[lo]->c_slope;
+		opentoppic = sector[lo]->ceilingpic;
 
 		if (mobj)
 		{
@@ -575,6 +578,7 @@ void P_LineOpening(line_t *linedef, mobj_t *mobj)
 		openbottom      = height[hi];
 		lowfloor        = height[lo];
 		openbottomslope = sector[hi]->f_slope;
+		openbottompic = sector[hi]->floorpic;
 
 		if (mobj)
 		{
@@ -747,6 +751,7 @@ void P_LineOpening(line_t *linedef, mobj_t *mobj)
 						if (bottomheight < open[FRONT].top) {
 							open[FRONT].top = bottomheight;
 							opentopslope = *rover->b_slope;
+							opentoppic = *rover->bottompic;
 							open[FRONT].ceilingrover = rover;
 						}
 						else if (bottomheight < highceiling)
@@ -758,6 +763,7 @@ void P_LineOpening(line_t *linedef, mobj_t *mobj)
 						if (topheight > open[FRONT].bottom) {
 							open[FRONT].bottom = topheight;
 							openbottomslope = *rover->t_slope;
+							openbottompic = *rover->toppic;
 							open[FRONT].floorrover = rover;
 						}
 						else if (topheight > lowfloor)
@@ -789,6 +795,7 @@ void P_LineOpening(line_t *linedef, mobj_t *mobj)
 						if (bottomheight < open[BACK].top) {
 							open[BACK].top = bottomheight;
 							opentopslope = *rover->b_slope;
+							opentoppic = *rover->bottompic;
 							open[BACK].ceilingrover = rover;
 						}
 						else if (bottomheight < highceiling)
@@ -800,6 +807,7 @@ void P_LineOpening(line_t *linedef, mobj_t *mobj)
 						if (topheight > open[BACK].bottom) {
 							open[BACK].bottom = topheight;
 							openbottomslope = *rover->t_slope;
+							openbottompic = *rover->toppic;
 							open[BACK].floorrover = rover;
 						}
 						else if (topheight > lowfloor)

src/p_maputl.h

@@ -63,6 +63,7 @@ extern fixed_t openceilingstep;
 extern fixed_t openceilingdrop;
 extern fixed_t openfloorstep;
 extern fixed_t openfloordrop;
+extern INT32 opentoppic, openbottompic;
 
 void P_LineOpening(line_t *plinedef, mobj_t *mobj);
 

src/p_mobj.c

@@ -40,6 +40,7 @@
 #include "k_color.h"
 #include "k_respawn.h"
 #include "k_bot.h"
+#include "k_terrain.h"
 
 static CV_PossibleValue_t CV_BobSpeed[] = {{0, "MIN"}, {4*FRACUNIT, "MAX"}, {0, NULL}};
 consvar_t cv_movebob = CVAR_INIT ("movebob", "1.0", CV_FLOAT|CV_SAVE, CV_BobSpeed, NULL);
@@ -1340,7 +1341,7 @@ static void P_XYFriction(mobj_t *mo, fixed_t oldx, fixed_t oldy)
 				mo->momy = FixedMul(mo->momy, mo->friction);
 			}
 
-			mo->friction = ORIG_FRICTION;
+			K_SetDefaultFriction(mo);
 		}
 	}
 	else
@@ -1505,7 +1506,10 @@ void P_XYMovement(mobj_t *mo)
 	oldy = mo->y;
 
 	if (mo->flags & MF_NOCLIPHEIGHT)
+	{
 		mo->standingslope = NULL;
+		mo->terrain = NULL;
+	}
 
 	// adjust various things based on slope
 	if (mo->standingslope && abs(mo->standingslope->zdelta) > FRACUNIT>>8) {
@@ -1671,6 +1675,7 @@ void P_XYMovement(mobj_t *mo)
 					{
 						mo->momz = transfermomz;
 						mo->standingslope = NULL;
+						mo->terrain = NULL;
 						P_SetPitchRoll(mo, ANGLE_90,
 								transferslope->xydirection
 								+ (transferslope->zangle
@@ -1782,6 +1787,7 @@ void P_XYMovement(mobj_t *mo)
 			mo->momz = P_MobjFlip(mo)*FRACUNIT/2;
 			mo->z = predictedz + P_MobjFlip(mo);
 			mo->standingslope = NULL;
+			mo->terrain = NULL;
 			//CONS_Printf("Launched off of flat surface running into downward slope\n");
 		}
 	}
@@ -2274,6 +2280,8 @@ boolean P_ZMovement(mobj_t *mo)
 		}
 
 		P_CheckPosition(mo, mo->x, mo->y); // Sets mo->standingslope correctly
+		K_UpdateMobjTerrain(mo, ((mo->eflags & MFE_VERTICALFLIP) ? tmceilingpic : tmfloorpic));
+
 		if (((mo->eflags & MFE_VERTICALFLIP) ? tmceilingslope : tmfloorslope) && (mo->type != MT_STEAM))
 		{
 			mo->standingslope = (mo->eflags & MFE_VERTICALFLIP) ? tmceilingslope : tmfloorslope;
@@ -2503,13 +2511,18 @@ boolean P_ZMovement(mobj_t *mo)
 		if (mo->type == MT_STEAM)
 			return true;
 	}
-	else if (!(mo->flags & MF_NOGRAVITY)) // Gravity here!
+	else
+	{
+		mo->terrain = NULL;
+
+		if (!(mo->flags & MF_NOGRAVITY)) // Gravity here!
 		{
 			/// \todo may not be needed (done in P_MobjThinker normally)
 			mo->eflags &= ~MFE_JUSTHITFLOOR;
 
 			P_CheckGravity(mo, true);
 		}
+	}
 
 	if (((mo->z + mo->height > mo->ceilingz && !(mo->eflags & MFE_VERTICALFLIP))
 		|| (mo->z < mo->floorz && mo->eflags & MFE_VERTICALFLIP))
@@ -2712,20 +2725,29 @@ void P_PlayerZMovement(mobj_t *mo)
 	if (onground && !(mo->flags & MF_NOCLIPHEIGHT))
 	{
 		if (mo->eflags & MFE_VERTICALFLIP)
+		{
 			mo->z = mo->ceilingz - mo->height;
+		}
 		else
+		{
 			mo->z = mo->floorz;
+		}
+
+		K_UpdateMobjTerrain(mo, (mo->eflags & MFE_VERTICALFLIP ? tmceilingpic : tmfloorpic));
 
 		// Get up if you fell.
 		if (mo->player->panim == PA_HURT && mo->player->spinouttimer == 0 && mo->player->tumbleBounces == 0)
+		{
 			P_SetPlayerMobjState(mo, S_KART_STILL);
+		}
 
-		if (!mo->standingslope && (mo->eflags & MFE_VERTICALFLIP ? tmceilingslope : tmfloorslope)) {
+		if (!mo->standingslope && (mo->eflags & MFE_VERTICALFLIP ? tmceilingslope : tmfloorslope))
+		{
 			// Handle landing on slope during Z movement
 			P_HandleSlopeLanding(mo, (mo->eflags & MFE_VERTICALFLIP ? tmceilingslope : tmfloorslope));
 		}
 
-		if (P_MobjFlip(mo)*mo->momz < 0) // falling
+		if (P_MobjFlip(mo) * mo->momz < 0) // falling
 		{
 			boolean clipmomz = !(P_CheckDeathPitCollide(mo));
 
@@ -2736,12 +2758,20 @@ void P_PlayerZMovement(mobj_t *mo)
 			P_PlayerPolyObjectZMovement(mo);
 
 			if (clipmomz)
+			{
 				mo->momz = (tmfloorthing ? tmfloorthing->momz : 0);
 			}
+		}
 		else if (tmfloorthing)
+		{
 			mo->momz = tmfloorthing->momz;
 		}
-	else if (!(mo->flags & MF_NOGRAVITY)) // Gravity here!
+	}
+	else
+	{
+		mo->terrain = NULL;
+
+		if (!(mo->flags & MF_NOGRAVITY)) // Gravity here!
 		{
 			if (P_IsObjectInGoop(mo) && !(mo->flags & MF_NOCLIPHEIGHT))
 			{
@@ -2760,6 +2790,7 @@ void P_PlayerZMovement(mobj_t *mo)
 			mo->eflags &= ~MFE_JUSTHITFLOOR;
 			P_CheckGravity(mo, true);
 		}
+	}
 
 	if (((mo->eflags & MFE_VERTICALFLIP && mo->z < mo->floorz) || (!(mo->eflags & MFE_VERTICALFLIP) && mo->z + mo->height > mo->ceilingz))
 		&& !(mo->flags & MF_NOCLIPHEIGHT))
@@ -3048,6 +3079,26 @@ void P_MobjCheckWater(mobj_t *mobj)
 		}
 	}
 
+	if (mobj->terrain != NULL)
+	{
+		if (mobj->terrain->flags & TRF_LIQUID)
+		{
+			// This floor is water.
+			mobj->eflags |= MFE_TOUCHWATER;
+
+			if (mobj->eflags & MFE_VERTICALFLIP)
+			{
+				mobj->watertop = thingtop + height;
+				mobj->waterbottom = thingtop;
+			}
+			else
+			{
+				mobj->watertop = mobj->z;
+				mobj->waterbottom = mobj->z - height;
+			}
+		}
+	}
+
 	if (mobj->watertop > top2)
 		mobj->watertop = top2;
 
@@ -3056,7 +3107,9 @@ void P_MobjCheckWater(mobj_t *mobj)
 
 	// Spectators and dead players don't get to do any of the things after this.
 	if (p && (p->spectator || p->playerstate != PST_LIVE))
+	{
 		return;
+	}
 
 	// The rest of this code only executes on a water state change.
 	if (!!(mobj->eflags & MFE_UNDERWATER) == wasinwater)
@@ -3073,6 +3126,30 @@ void P_MobjCheckWater(mobj_t *mobj)
 	 || ((mobj->info->flags & MF_PUSHABLE) && mobj->fuse) // Previously pushable, might be moving still
 	)
 	{
+		fixed_t waterZ = INT32_MAX;
+		fixed_t solidZ = INT32_MAX;
+		fixed_t diff = INT32_MAX;
+
+		fixed_t thingZ = INT32_MAX;
+		boolean splashValid = false;
+
+		if (mobj->eflags & MFE_VERTICALFLIP)
+		{
+			waterZ = mobj->waterbottom;
+			solidZ = mobj->ceilingz;
+		}
+		else
+		{
+			waterZ = mobj->watertop;
+			solidZ = mobj->floorz;
+		}
+
+		diff = waterZ - solidZ;
+		if (mobj->eflags & MFE_VERTICALFLIP)
+		{
+			diff = -diff;
+		}
+
 		// Time to spawn the bubbles!
 		{
 			INT32 i;
@@ -3131,12 +3208,15 @@ void P_MobjCheckWater(mobj_t *mobj)
 
 		// Check to make sure you didn't just cross into a sector to jump out of
 		// that has shallower water than the block you were originally in.
-		if ((!(mobj->eflags & MFE_VERTICALFLIP) && mobj->watertop-mobj->floorz <= height>>1)
+		if (diff <= (height >> 1))
-			|| ((mobj->eflags & MFE_VERTICALFLIP) && mobj->ceilingz-mobj->waterbottom <= height>>1))
+		{
 			return;
+		}
 
-		if (mobj->eflags & MFE_GOOWATER || wasingoo) { // Decide what happens to your momentum when you enter/leave goopy water.
+		if (mobj->eflags & MFE_GOOWATER || wasingoo)
-			if (P_MobjFlip(mobj)*mobj->momz > 0)
+		{
+			// Decide what happens to your momentum when you enter/leave goopy water.
+			if (P_MobjFlip(mobj) * mobj->momz > 0)
 			{
 				mobj->momz -= (mobj->momz/8); // cut momentum a little bit to prevent multiple bobs
 				//CONS_Printf("leaving\n");
@@ -3148,25 +3228,42 @@ void P_MobjCheckWater(mobj_t *mobj)
 				//CONS_Printf("entering\n");
 			}
 		}
-		else if (wasinwater && P_MobjFlip(mobj)*mobj->momz > 0)
+		else if (wasinwater && P_MobjFlip(mobj) * mobj->momz > 0)
-			mobj->momz = FixedMul(mobj->momz, FixedDiv(780*FRACUNIT, 457*FRACUNIT)); // Give the mobj a little out-of-water boost.
-
-		if (P_MobjFlip(mobj)*mobj->momz < 0)
 		{
-			if ((mobj->eflags & MFE_VERTICALFLIP && thingtop-(height>>1)-mobj->momz <= mobj->waterbottom)
+			// Give the mobj a little out-of-water boost.
-				|| (!(mobj->eflags & MFE_VERTICALFLIP) && mobj->z+(height>>1)-mobj->momz >= mobj->watertop))
+			mobj->momz = FixedMul(mobj->momz, FixedDiv(780*FRACUNIT, 457*FRACUNIT));
+		}
+
+		if (mobj->eflags & MFE_VERTICALFLIP)
+		{
+			thingZ = thingtop - (height >> 1);
+			splashValid = (thingZ - mobj->momz <= waterZ);
+		}
+		else
+		{
+			thingZ = mobj->z + (height >> 1);
+			splashValid = (thingZ - mobj->momz >= waterZ);
+		}
+
+		if (P_MobjFlip(mobj) * mobj->momz <= 0)
+		{
+			if (splashValid == true)
 			{
 				// Spawn a splash
 				mobj_t *splish;
 				mobjtype_t splishtype = (mobj->eflags & MFE_TOUCHLAVA) ? MT_LAVASPLISH : MT_SPLISH;
+
 				if (mobj->eflags & MFE_VERTICALFLIP)
 				{
-					splish = P_SpawnMobj(mobj->x, mobj->y, mobj->waterbottom-FixedMul(mobjinfo[splishtype].height, mobj->scale), splishtype);
+					splish = P_SpawnMobj(mobj->x, mobj->y, waterZ - FixedMul(mobjinfo[splishtype].height, mobj->scale), splishtype);
 					splish->flags2 |= MF2_OBJECTFLIP;
 					splish->eflags |= MFE_VERTICALFLIP;
 				}
 				else
-					splish = P_SpawnMobj(mobj->x, mobj->y, mobj->watertop, splishtype);
+				{
+					splish = P_SpawnMobj(mobj->x, mobj->y, waterZ, splishtype);
+				}
+
 				splish->destscale = mobj->scale;
 				P_SetScale(splish, mobj->scale);
 			}
@@ -3175,40 +3272,37 @@ void P_MobjCheckWater(mobj_t *mobj)
 			if (p && p->waterskip < 2
 				&& ((p->speed/3 > abs(mobj->momz)) // Going more forward than horizontal, so you can skip across the water.
 				|| (p->speed > 20*mapobjectscale && p->waterskip)) // Already skipped once, so you can skip once more!
-				&& ((!(mobj->eflags & MFE_VERTICALFLIP) && thingtop - mobj->momz > mobj->watertop)
+				&& (splashValid == true))
-				|| ((mobj->eflags & MFE_VERTICALFLIP) && mobj->z - mobj->momz < mobj->waterbottom)))
 			{
-				const fixed_t hop = 5<<FRACBITS;
+				const fixed_t hop = 5 * mobj->scale;
 
 				mobj->momx = (4*mobj->momx)/5;
 				mobj->momy = (4*mobj->momy)/5;
-
+				mobj->momz = hop * P_MobjFlip(mobj);
-				if (mobj->eflags & MFE_VERTICALFLIP)
-					mobj->momz = FixedMul(-hop, mobj->scale);
-				else
-					mobj->momz = FixedMul(hop, mobj->scale);
 
 				p->waterskip++;
 			}
 
 		}
-		else if (P_MobjFlip(mobj)*mobj->momz > 0)
+		else if (P_MobjFlip(mobj) * mobj->momz > 0)
 		{
-			if (((mobj->eflags & MFE_VERTICALFLIP && thingtop-(height>>1)-mobj->momz > mobj->waterbottom)
+			if (splashValid == true && !(mobj->eflags & MFE_UNDERWATER)) // underwater check to prevent splashes on opposite side
-				|| (!(mobj->eflags & MFE_VERTICALFLIP) && mobj->z+(height>>1)-mobj->momz < mobj->watertop))
-				&& !(mobj->eflags & MFE_UNDERWATER)) // underwater check to prevent splashes on opposite side
 			{
 				// Spawn a splash
 				mobj_t *splish;
 				mobjtype_t splishtype = (mobj->eflags & MFE_TOUCHLAVA) ? MT_LAVASPLISH : MT_SPLISH;
+
 				if (mobj->eflags & MFE_VERTICALFLIP)
 				{
-					splish = P_SpawnMobj(mobj->x, mobj->y, mobj->waterbottom-FixedMul(mobjinfo[splishtype].height, mobj->scale), splishtype);
+					splish = P_SpawnMobj(mobj->x, mobj->y, waterZ - FixedMul(mobjinfo[splishtype].height, mobj->scale), splishtype);
 					splish->flags2 |= MF2_OBJECTFLIP;
 					splish->eflags |= MFE_VERTICALFLIP;
 				}
 				else
-					splish = P_SpawnMobj(mobj->x, mobj->y, mobj->watertop, splishtype);
+				{
+					splish = P_SpawnMobj(mobj->x, mobj->y, waterZ, splishtype);
+				}
+
 				splish->destscale = mobj->scale;
 				P_SetScale(splish, mobj->scale);
 			}

src/p_mobj.h

@@ -397,6 +397,7 @@ typedef struct mobj_s
 
 	fixed_t sprxoff, spryoff, sprzoff; // Sprite offsets in real space, does NOT affect position or collision
 
+	struct terrain_s *terrain; // Terrain definition of the floor this object last hit. NULL when in the air.
 	INT32 hitlag; // Sal-style hit lag, straight from Captain Fetch's jowls
 
 	// WARNING: New fields must be added separately to savegame and Lua.

src/p_saveg.c

@@ -38,6 +38,7 @@
 // SRB2Kart
 #include "k_battle.h"
 #include "k_pwrlv.h"
+#include "k_terrain.h"
 
 savedata_t savedata;
 UINT8 *save_p;
@@ -1540,6 +1541,7 @@ typedef enum
 	MD2_KITEMCAP     = 1<<26,
 	MD2_ITNEXT       = 1<<27,
 	MD2_LASTMOMZ     = 1<<28,
+	MD2_TERRAIN      = 1<<29,
 } mobj_diff2_t;
 
 typedef enum
@@ -1782,6 +1784,8 @@ static void SaveMobjThinker(const thinker_t *th, const UINT8 type)
 		diff2 |= MD2_ITNEXT;
 	if (mobj->lastmomz)
 		diff2 |= MD2_LASTMOMZ;
+	if (mobj->terrain != NULL)
+		diff2 |= MD2_TERRAIN;
 
 	if (diff2 != 0)
 		diff |= MD_MORE;
@@ -1979,6 +1983,10 @@ static void SaveMobjThinker(const thinker_t *th, const UINT8 type)
 	{
 		WRITEINT32(save_p, mobj->lastmomz);
 	}
+	if (diff2 & MD2_TERRAIN)
+	{
+		WRITEUINT32(save_p, K_GetTerrainHeapIndex(mobj->terrain));
+	}
 
 	WRITEUINT32(save_p, mobj->mobjnum);
 }
@@ -3077,6 +3085,14 @@ static thinker_t* LoadMobjThinker(actionf_p1 thinker)
 	{
 		mobj->lastmomz = READINT32(save_p);
 	}
+	if (diff2 & MD2_TERRAIN)
+	{
+		mobj->terrain = (terrain_t *)(size_t)READUINT32(save_p);
+	}
+	else
+	{
+		mobj->terrain = NULL;
+	}
 
 	if (diff & MD_REDFLAG)
 	{

src/p_setup.c

@@ -91,6 +91,7 @@
 #include "k_waypoint.h"
 #include "k_bot.h"
 #include "k_grandprix.h"
+#include "k_terrain.h" // TRF_TRIPWIRE
 #include "k_brightmap.h"
 
 // Replay names have time
@@ -1940,18 +1941,15 @@ static void P_ProcessLinedefsAfterSidedefs(void)
 	size_t i = numlines;
 	register line_t *ld = lines;
 
-	const INT32 TEX_TRIPWIRE = R_TextureNumForName("TRIPWIRE");
-	const INT32 TEX_4RIPWIRE = R_TextureNumForName("4RIPWIRE");
-
 	for (; i--; ld++)
 	{
 		INT32 midtexture = sides[ld->sidenum[0]].midtexture;
+		terrain_t *terrain = K_GetTerrainForTextureNum(midtexture);
 
 		ld->frontsector = sides[ld->sidenum[0]].sector; //e6y: Can't be -1 here
 		ld->backsector = ld->sidenum[1] != 0xffff ? sides[ld->sidenum[1]].sector : 0;
 
-		if (midtexture == TEX_TRIPWIRE ||
+		if (terrain != NULL && (terrain->flags & TRF_TRIPWIRE))
-				midtexture == TEX_4RIPWIRE)
 		{
 			ld->tripwire = true;
 		}

src/p_slopes.c

@@ -850,6 +850,7 @@ void P_SlopeLaunch(mobj_t *mo)
 
 	//CONS_Printf("Launched off of slope.\n");
 	mo->standingslope = NULL;
+	mo->terrain = NULL;
 
 	if (mo->player)
 	{

src/p_spec.c

@@ -43,6 +43,7 @@
 #include "k_kart.h"
 #include "console.h" // CON_LogMessage
 #include "k_respawn.h"
+#include "k_terrain.h"
 
 #ifdef HW3SOUND
 #include "hardware/hw3sound.h"
@@ -4333,7 +4334,9 @@ void P_ProcessSpecialSector(player_t *player, sector_t *sector, sector_t *rovers
 
 	// Conveyor stuff
 	if (section3 == 2 || section3 == 4)
+	{
 		player->onconveyor = section3;
+	}
 
 	special = section1;
 
@@ -4657,7 +4660,7 @@ DoneSection2:
 		case 6: // SRB2kart 190117 - Sneaker Panel
 			if (roversector || P_MobjReadyToTrigger(player->mo, sector))
 			{
-				if (!player->floorboost)
+				if (player->floorboost == 0)
 					player->floorboost = 3;
 				else
 					player->floorboost = 2;
@@ -5050,6 +5053,7 @@ void P_PlayerInSpecialSector(player_t *player)
 	if (!player->mo)
 		return;
 
+	K_ProcessTerrainEffect(player->mo);
 	originalsector = player->mo->subsector->sector;
 
 	P_PlayerOnSpecial3DFloor(player, originalsector); // Handle FOFs first.

src/p_user.c

@@ -52,6 +52,7 @@
 #include "k_respawn.h"
 #include "k_bot.h"
 #include "k_grandprix.h"
+#include "k_terrain.h" // K_SpawnSplashForMobj
 
 #ifdef HW3SOUND
 #include "hardware/hw3sound.h"
@@ -1274,17 +1275,18 @@ void P_DoPlayerExit(player_t *player)
 //
 // Handles player hitting floor surface.
 // Returns whether to clip momz.
-boolean P_PlayerHitFloor(player_t *player, boolean dorollstuff)
+boolean P_PlayerHitFloor(player_t *player, boolean fromAir)
 {
 	boolean clipmomz;
 
-	(void)dorollstuff;
-
 	I_Assert(player->mo != NULL);
 
 	clipmomz = !(P_CheckDeathPitCollide(player->mo));
 
-	// SRB2Kart: removed lots of really vanilla-specific code here
+	if (fromAir == true && clipmomz == true)
+	{
+		K_SpawnSplashForMobj(player->mo, abs(player->mo->momz));
+	}
 
 	return clipmomz;
 }
@@ -2138,8 +2140,6 @@ void P_MovePlayer(player_t *player)
 		player->mo->rollangle = 0;
 	}
 
-	player->mo->movefactor = FRACUNIT; // We're not going to do any more with this, so let's change it back for the next frame.
-
 	//{ SRB2kart
 
 	// Drifting sound
@@ -2267,7 +2267,7 @@ void P_MovePlayer(player_t *player)
 		K_SpawnSparkleTrail(player->mo);
 
 	if (player->wipeoutslow > 1 && (leveltime & 1))
-		K_SpawnWipeoutTrail(player->mo, false);
+		K_SpawnWipeoutTrail(player->mo);
 
 	K_DriftDustHandling(player->mo);
 
@@ -4502,8 +4502,6 @@ void P_PlayerThink(player_t *player)
 		P_MovePlayer(player);
 	}
 
-	player->mo->movefactor = FRACUNIT; // We're not going to do any more with this, so let's change it back for the next frame.
-
 	// Unset statis flag after moving.
 	// In other words, if you manually set stasis via code,
 	// it lasts for one tic.

src/r_bsp.c

@@ -23,6 +23,8 @@
 #include "z_zone.h" // Check R_Prep3DFloors
 #include "taglist.h"
 
+#include "k_terrain.h"
+
 seg_t *curline;
 side_t *sidedef;
 line_t *linedef;
@@ -67,12 +69,36 @@ boolean R_IsRipplePlane(sector_t *sector, ffloor_t *rover, int ceiling)
 
 static void R_PlaneLightOverride(sector_t *sector, boolean ceiling, INT32 *lightlevel)
 {
-	if (GETSECSPECIAL(sector->special, 4) == 6) // Fullbright sneaker panels
+	terrain_t *t = NULL;
+
+	if (ceiling == true)
+	{
+		t = K_GetTerrainForFlatNum(sector->ceilingpic);
+	}
+	else
+	{
+		t = K_GetTerrainForFlatNum(sector->floorpic);
+	}
+
+	if (t != NULL)
+	{
+		if (t->flags & TRF_SNEAKERPANEL)
+		{
+			*lightlevel = 255;
+		}
+	}
+	else
+	{
+		// Sector effect sneaker panels (DEPRECATED)
+		if (GETSECSPECIAL(sector->special, 4) == 6)
 		{
 			if ((ceiling && (sector->flags & SF_FLIPSPECIAL_CEILING))
 				|| (!ceiling && (sector->flags & SF_FLIPSPECIAL_FLOOR)))
+			{
 				*lightlevel = 255;
 			}
+		}
+	}
 }
 
 //

src/tables.c

@@ -185,6 +185,16 @@ INT32 AngleDeltaSigned(angle_t a1, angle_t a2)
 	return (INT32)(a1) - (INT32)(a2);
 }
 
+float AngleToFloat(angle_t x)
+{
+	return x / (float)ANG1;
+}
+
+angle_t FloatToAngle(float f)
+{
+	return (angle_t)(f * ANG1);
+}
+
 #include "t_ftan.c"
 
 #include "t_fsin.c"

src/tables.h

@@ -108,6 +108,8 @@ FUNCMATH angle_t FixedAngleC(fixed_t fa, fixed_t factor);
 // difference between two angle_t
 FUNCMATH INT32 AngleDelta(angle_t a1, angle_t a2);
 FUNCMATH INT32 AngleDeltaSigned(angle_t a1, angle_t a2);
+FUNCMATH float AngleToFloat(angle_t x);
+FUNCMATH angle_t FloatToAngle(float f);
 
 /// The FixedAcos function
 FUNCMATH angle_t FixedAcos(fixed_t x);

src/w_wad.c

@@ -69,6 +69,8 @@
 #include "m_misc.h" // M_MapNumber
 #include "g_game.h" // G_SetGameModified
 
+#include "k_terrain.h"
+
 #ifdef HWRENDER
 #include "hardware/hw_main.h"
 #include "hardware/hw_glob.h"
@@ -866,6 +868,8 @@ UINT16 W_InitFile(const char *filename, boolean mainfile, boolean startup)
 		break;
 	}
 
+	K_InitTerrain(numwadfiles - 1);
+
 	if (refreshdirmenu & REFRESHDIR_GAMEDATA)
 		G_LoadGameData();
 	DEH_UpdateMaxFreeslots();