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Fix active distance

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This commit is contained in:
Miloslav Číž 2020-01-11 18:05:27 +01:00
parent cad12c2d93
commit b4cc671cd8
3 changed files with 24 additions and 19 deletions
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6
constants.h
View File

@ -58,10 +58,10 @@
#define SFG_DOOR_OPEN_SPEED 2048
/**
Says the (Chebyshev) distance in game squares at which level elements
(items, monsters etc.) become active.
Says the distance in RCL_Units at which level elements (items, monsters etc.)
are active.
*/
#define SFG_LEVEL_ELEMENT_ACTIVE_DISTANCE 10
#define SFG_LEVEL_ELEMENT_ACTIVE_DISTANCE (12 * 1024)
/**
Rate at which AI will be updated, which also affects how fast enemies will

2
levels.h
View File

@ -255,7 +255,7 @@ SFG_PROGRAM_MEMORY SFG_Level SFG_level0 =
13, // doorTextureIndex
10, // floorColor
32, // ceilingColor
{10,10,0}, // player start: x, y, direction
{8,19,0}, // player start: x, y, direction
0, // backgroundImage
{ // elements
{SFG_LEVEL_ELEMENT_BARREL, {9, 1}}, {SFG_LEVEL_ELEMENT_BARREL, {9, 13}},

35
main.c
View File

@ -351,6 +351,13 @@ RCL_Unit SFG_taxicabDistance(
return (RCL_absVal(x0 - x1) + RCL_absVal(y0 - y1) + RCL_absVal(z0 - z1));
}
uint8_t SFG_isInActiveDistanceFromPlayer(RCL_Unit x, RCL_Unit y, RCL_Unit z)
{
return SFG_taxicabDistance(
x,y,z,SFG_player.camera.position.x,SFG_player.camera.position.y,
SFG_player.camera.height) <= SFG_LEVEL_ELEMENT_ACTIVE_DISTANCE;
}
static inline uint8_t SFG_RCLUnitToZBuffer(RCL_Unit x)
{
x /= RCL_UNITS_PER_SQUARE;
@ -2181,7 +2188,6 @@ void SFG_gameStep()
}
// handle door:
if (SFG_currentLevel.doorRecordCount > 0) // has to be here
{
/* Check one door on whether a player is standing nearby. For performance
@ -2226,7 +2232,6 @@ void SFG_gameStep()
}
// handle items, in a similar manner to door:
if (SFG_currentLevel.itemRecordCount > 0) // has to be here
{
// check item distances:
@ -2245,11 +2250,10 @@ void SFG_gameStep()
SFG_currentLevel.levelPointer->elements[item];
if (
RCL_absVal(SFG_player.squarePosition[0] - e.coords[0])
<= SFG_LEVEL_ELEMENT_ACTIVE_DISTANCE
&&
RCL_absVal(SFG_player.squarePosition[1] - e.coords[1])
<= SFG_LEVEL_ELEMENT_ACTIVE_DISTANCE
SFG_isInActiveDistanceFromPlayer(
e.coords[0] * RCL_UNITS_PER_SQUARE + RCL_UNITS_PER_SQUARE / 2,
e.coords[1] * RCL_UNITS_PER_SQUARE + RCL_UNITS_PER_SQUARE / 2,
SFG_floorHeightAt(e.coords[0],e.coords[1]) + RCL_UNITS_PER_SQUARE / 2)
)
item |= SFG_ITEM_RECORD_ACTIVE_MASK;
@ -2263,7 +2267,6 @@ void SFG_gameStep()
}
// similarly handle monsters:
if (SFG_currentLevel.monsterRecordCount > 0) // has to be here
{
// check monster distances:
@ -2277,11 +2280,14 @@ void SFG_gameStep()
&(SFG_currentLevel.monsterRecords[SFG_currentLevel.checkedMonsterIndex]);
if ( // far away from the player?
RCL_absVal(SFG_player.squarePosition[0] - monster->coords[0] / 4)
> SFG_LEVEL_ELEMENT_ACTIVE_DISTANCE
||
RCL_absVal(SFG_player.squarePosition[1] - monster->coords[1] / 4)
> SFG_LEVEL_ELEMENT_ACTIVE_DISTANCE
!SFG_isInActiveDistanceFromPlayer(
SFG_MONSTER_COORD_TO_RCL_UNITS(monster->coords[0]),
SFG_MONSTER_COORD_TO_RCL_UNITS(monster->coords[1]),
SFG_floorHeightAt(
SFG_MONSTER_COORD_TO_SQUARES(monster->coords[0]),
SFG_MONSTER_COORD_TO_SQUARES(monster->coords[1]))
+ RCL_UNITS_PER_SQUARE / 2
)
)
{
monster->stateType =
@ -2303,8 +2309,7 @@ void SFG_gameStep()
}
}
// update AI and handle dead monsters
// update AI and handle dead monsters:
if ((SFG_gameFrame - SFG_currentLevel.frameStart) %
SFG_AI_UPDATE_FRAME_INTERVAL == 0)
{