Getzrange - Revision history

Sangman: spritebridge example

2020-12-04T00:45:32Z

spritebridge example

← Older revision		Revision as of 17:45, 3 December 2020
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	* 49152 + spritenum, if a sprite was hit first<br>		* 49152 + spritenum, if a sprite was hit first<br>

			The behaviour in corner cases (sectnum invalid, x/y/z not in sectnum, etc.) should not be relied upon.

	The ~~behaviour in corner cases (sectnum invalid~~, x/y/z ~~not in~~ sectnum, ~~etc.) should not be relied upon.~~		===Example: Checking for spritebridges===
			The state below checks if the current actor is on a spritebridge, and if so, "returns" the id of that sprite.

			// assumption: relevant variables are declared
			defstate check_spritebridge
			geta[].x my_x
			geta[].y my_y
			geta[].z my_z
			geta[].sectnum sectnum

			getzrange my_x my_y my_z sectnum
			ceilingz
			ceilinghit
			floorz
			floorhit
			256
			CLIPMASK0

			set outputSpriteId -1
			ifge floorhit 49152
			{
			sub floorhit 49152

			ifvarand sprite[floorhit].cstat 32
			set outputSpriteId floorhit
			}

			// outputSpriteId now contains either -1 if no spritebridge is detected, or the id of the spritebridge if there is
			ends

2011-03-07T20:47:44Z

first edit. I hope that I got everything right.

← Older revision		Revision as of 13:47, 7 March 2011
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	'''getzrange''' <x> <y> <z> <sector> ''<ceilingz>'' ''<ceilinghit>'' ''<floorz>'' ''<floorhit>'' <walldist> <~~cliptype~~>		'''getzrange''' <x> <y> <z> <sector> ''<ceilingz>'' ''<ceilinghit>'' ''<floorz>'' ''<floorhit>'' <walldist> <clipmask>

			Given a starting point and its containing sector, calculate (1) the z coordinates of (2) the objects that would be first hit by a quadratic, floor-aligned sprite pointing parallel to the grid and having side length 2*<walldist>, when travelling in a straight line up- and downwards (respectively for <ceiling...> and <floor...>). The <clipmask> is specified in the same fashion as in [[hitscan]].

			''<ceilinghit>'' and ''<floorhit>'' can take the following values:<br>
			* 16384 + sectnum, if a ceiling or floor was hit first<br>
			* 49152 + spritenum, if a sprite was hit first<br>


			The behaviour in corner cases (sectnum invalid, x/y/z not in sectnum, etc.) should not be relied upon.

2010-08-04T15:10:27Z

created getzrange, only signature for now

New page

'''getzrange''' <x> <y> <z> <sector> ''<ceilingz>'' ''<ceilinghit>'' ''<floorz>'' ''<floorhit>'' <walldist> <cliptype>