Model tilts

- Add modeltilt variable, for more manual control of the model tilting. By default this just copies standingslope, but doesn't get cleared in the air.
- Shadows & trailing bananas now tilt to match the ground they are on.
- Rocket Sneakers & afterimages now tilt to match the player's current orientation.

src/hardware/hw_md2.c

@@ -1647,11 +1647,11 @@ boolean HWR_DrawModel(gl_vissprite_t *spr)
 #ifdef USE_FTRANSFORM_ANGLEZ
 		// Slope rotation from Kart
 		p.anglez = 0.0f;
-		if (spr->mobj->standingslope)
+		if (spr->mobj->modeltilt)
 		{
-			fixed_t tempz = spr->mobj->standingslope->normal.z;
-			fixed_t tempy = spr->mobj->standingslope->normal.y;
-			fixed_t tempx = spr->mobj->standingslope->normal.x;
+			fixed_t tempz = spr->mobj->modeltilt->normal.z;
+			fixed_t tempy = spr->mobj->modeltilt->normal.y;
+			fixed_t tempx = spr->mobj->modeltilt->normal.x;
 			fixed_t tempangle = AngleFixed(R_PointToAngle2(0, 0, FixedSqrt(FixedMul(tempy, tempy) + FixedMul(tempz, tempz)), tempx));
 			p.anglez = FIXED_TO_FLOAT(tempangle);
 			tempangle = -AngleFixed(R_PointToAngle2(0, 0, tempz, tempy));

src/p_map.c

@@ -2928,6 +2928,9 @@ boolean P_TryMove(mobj_t *thing, fixed_t x, fixed_t y, boolean allowdropoff)
 			if (thing->momz <= 0)
 			{
 				thing->standingslope = tmfloorslope;
+#ifdef HWRENDER
+				thing->modeltilt = thing->standingslope;
+#endif
 				if (thing->momz == 0 && thing->player && !startingonground)
 					P_PlayerHitFloor(thing->player, true);
 			}
@@ -2939,6 +2942,9 @@ boolean P_TryMove(mobj_t *thing, fixed_t x, fixed_t y, boolean allowdropoff)
 			if (thing->momz >= 0)
 			{
 				thing->standingslope = tmceilingslope;
+#ifdef HWRENDER
+				thing->modeltilt = thing->standingslope;
+#endif
 				if (thing->momz == 0 && thing->player && !startingonground)
 					P_PlayerHitFloor(thing->player, true);
 			}

src/p_mobj.c

@@ -1985,6 +1985,9 @@ void P_XYMovement(mobj_t *mo)
 			// Now compare the Zs of the different quantizations
 			if (oldangle-newangle > ANG30 && oldangle-newangle < ANGLE_180) { // Allow for a bit of sticking - this value can be adjusted later
 				mo->standingslope = oldslope;
+#ifdef HWRENDER
+				mo->modeltilt = mo->standingslope;
+#endif
 				P_SlopeLaunch(mo);
 
 				//CONS_Printf("launched off of slope - ");
@@ -2557,6 +2560,9 @@ boolean P_ZMovement(mobj_t *mo)
 		if (((mo->eflags & MFE_VERTICALFLIP) ? tmceilingslope : tmfloorslope) && (mo->type != MT_STEAM))
 		{
 			mo->standingslope = (mo->eflags & MFE_VERTICALFLIP) ? tmceilingslope : tmfloorslope;
+#ifdef HWRENDER
+			mo->modeltilt = mo->standingslope;
+#endif
 			P_ReverseQuantizeMomentumToSlope(&mom, mo->standingslope);
 		}
 

src/p_mobj.h

@@ -394,6 +394,9 @@ typedef struct mobj_s
 	INT32 cvmem;
 
 	struct pslope_s *standingslope; // The slope that the object is standing on (shouldn't need synced in savegames, right?)
+#ifdef HWRENDER
+	struct pslope_s *modeltilt; // Slope used for model tilting. Also is not synched, this is totally visual.
+#endif
 
 	boolean resetinterp; // if true, some fields should not be interpolated (see R_InterpolateMobjState implementation)
 	boolean colorized; // Whether the mobj uses the rainbow colormap

src/p_saveg.c

@@ -2996,7 +2996,11 @@ static thinker_t* LoadMobjThinker(actionf_p1 thinker)
 	if (diff2 & MD2_HPREV)
 		mobj->hprev = (mobj_t *)(size_t)READUINT32(save_p);
 	if (diff2 & MD2_SLOPE)
+	{
 		mobj->standingslope = P_SlopeById(READUINT16(save_p));
+#ifdef HWRENDER
+		mobj->modeltilt = mobj->standingslope;
+#endif
 	if (diff2 & MD2_COLORIZED)
 		mobj->colorized = READUINT8(save_p);
 	if (diff2 & MD2_MIRRORED)

src/p_slopes.c

@@ -899,6 +899,9 @@ void P_HandleSlopeLanding(mobj_t *thing, pslope_t *slope)
 		if (P_MobjFlip(thing)*(thing->momz) < 0) // falling, land on slope
 		{
 			thing->standingslope = slope;
+#ifdef HWRENDER
+			thing->modeltilt = thing->standingslope;
+#endif
 			if (!thing->player || !(thing->player->pflags & PF_BOUNCING))
 				thing->momz = -P_MobjFlip(thing);
 		}
@@ -915,6 +918,9 @@ void P_HandleSlopeLanding(mobj_t *thing, pslope_t *slope)
 		thing->momx = mom.x;
 		thing->momy = mom.y;
 		thing->standingslope = slope;
+#ifdef HWRENDER
+		thing->modeltilt = thing->standingslope;
+#endif
 		if (!thing->player || !(thing->player->pflags & PF_BOUNCING))
 			thing->momz = -P_MobjFlip(thing);
 	}

src/p_user.c

@@ -1995,6 +1995,10 @@ mobj_t *P_SpawnGhostMobj(mobj_t *mobj)
 
 	ghost->fuse = ghost->info->damage;
 	ghost->skin = mobj->skin;
+	ghost->standingslope = mobj->standingslope;
+#ifdef HWRENDER
+	ghost->modeltilt = mobj->modeltilt;
+#endif
 
 	if (mobj->flags2 & MF2_OBJECTFLIP)
 		ghost->flags |= MF2_OBJECTFLIP;