erlang.spawn/fallout2-ce: Classic Fallout for modern operating systems

src/light.cc
153 строки3 KB
Mike Klaas
Add original symbol beside all function and symbol offsets (#332)
12 май 2026, 05:49
12 май 2026, 05:497ae0452
#include "light.h"

#include <algorithm>

#include "map_defs.h"
#include "object.h"
#include "perk.h"
#include "tile.h"

namespace fallout {

// 20% of max light per "Night Vision" rank
#define LIGHT_LEVEL_NIGHT_VISION_BONUS (65536 / 5)

// 0x51923C ambient_light
static int gAmbientIntensity = LIGHT_INTENSITY_MAX;

// light intensity per elevation per tile
// 0x59E994 tile_intensity
static int gTileIntensity[ELEVATION_COUNT][HEX_GRID_SIZE];

// 0x47A8F0 light_init
int lightInit()
{
    lightResetTileIntensity();
    return 0;
}

// 0x47A8F0 light_init
void lightReset()
{
    lightResetTileIntensity();
}

// 0x47A8F0 light_init
void lightExit()
{
    lightResetTileIntensity();
}

// 0x47A8F8 light_get_ambient
int lightGetAmbientIntensity()
{
    return gAmbientIntensity;
}

// 0x47A908 light_set_ambient
void lightSetAmbientIntensity(int intensity, bool shouldUpdateScreen)
{
    int adjustedIntensity = intensity + perkGetRank(gDude, PERK_NIGHT_VISION) * LIGHT_LEVEL_NIGHT_VISION_BONUS;
    int normalizedIntensity = std::clamp(adjustedIntensity, LIGHT_INTENSITY_MIN, LIGHT_INTENSITY_MAX);

    int oldAmbientIntensity = gAmbientIntensity;
    gAmbientIntensity = normalizedIntensity;

    if (shouldUpdateScreen) {
        if (oldAmbientIntensity != normalizedIntensity) {
            tileWindowRefresh();
        }
    }
}

// 0x47A980 light_get_tile
int lightGetTileIntensity(int elevation, int tile)
{
    if (!elevationIsValid(elevation)) {
        return 0;
    }

    if (!hexGridTileIsValid(tile)) {
        return 0;
    }

    return std::min(gTileIntensity[elevation][tile], LIGHT_INTENSITY_MAX);
}

// 0x47A9C4 light_get_tile_true
int lightGetTrueTileIntensity(int elevation, int tile)
{
    if (!elevationIsValid(elevation)) {
        return 0;
    }

    if (!hexGridTileIsValid(tile)) {
        return 0;
    }

    return gTileIntensity[elevation][tile];
}

// 0x47A9EC light_set_tile
void lightSetTileIntensity(int elevation, int tile, int intensity)
{
    if (!elevationIsValid(elevation)) {
        return;
    }

    if (!hexGridTileIsValid(tile)) {
        return;
    }

    gTileIntensity[elevation][tile] = intensity;
}

// 0x47AA10 light_add_to_tile
void lightIncreaseTileIntensity(int elevation, int tile, int intensity)
{
    if (!elevationIsValid(elevation)) {
        return;
    }

    if (!hexGridTileIsValid(tile)) {
        return;
    }

    gTileIntensity[elevation][tile] += intensity;
}

// 0x47AA48 light_subtract_from_tile
void lightDecreaseTileIntensity(int elevation, int tile, int intensity)
{
    if (!elevationIsValid(elevation)) {
        return;
    }

    if (!hexGridTileIsValid(tile)) {
        return;
    }

    gTileIntensity[elevation][tile] -= intensity;
}

// 0x47AA84 light_reset_tiles
void lightResetTileIntensity()
{
    for (int elevation = 0; elevation < ELEVATION_COUNT; elevation++) {
        for (int tile = 0; tile < HEX_GRID_SIZE; tile++) {
            gTileIntensity[elevation][tile] = 655;
        }
    }
}

void lightDecreaseAmbient(int val)
{
    lightSetAmbientIntensity(gAmbientIntensity - val, true);
}

void lightIncreaseAmbient(int val)
{
    lightSetAmbientIntensity(gAmbientIntensity + val, true);
}

} // namespace fallout