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Decompile fn_19799 (CEffectPrim::PrimFieldFireflies)

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Batch #2889 by ragnarok-clanker: 0 byte-identical, 1 confirmed by peer review.

- fn_19799 CEffectPrim::PrimFieldFireflies: logic confirmed by peer review

Peer-reviewed-by: meitogi, willerthal, youko
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
This commit is contained in:
ragnarok-clanker 2026-10-29 19:49:51 +00:00
commit 36c1b3ac40
2 changed files with 157 additions and 0 deletions
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156
Source/Contents/Effects/EffectPrimitiveMotion.cpp
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@ -26,6 +26,7 @@
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
namespace {
// INLINED
@ -5624,3 +5625,158 @@ bool CEffectPrim::Prim3DSlotParticle() {
this->ShiftSegment();
return this->AnimMotion();
}
// OFFSET: 0x00BBC080
// FUNCTION: fn_19799
bool CEffectPrim::PrimFieldFireflies() {
FaceCamera(this->state.slots);
this->render.position = this->state.master->render.position;
for (int index = 0; index < 4; ++index) {
EffectPrimitiveSlot& slot = this->state.slots[index];
if (slot.life != 1) {
continue;
}
const float kind = slot.height[7];
if (kind < 99.0f) {
const int process = ++slot.process;
if (slot.flag1[2] == 23 && process % 14 == 0) {
char frame = ++slot.flag1[0];
if (frame > 5) {
frame = 0;
}
slot.flag1[0] = frame;
}
if (kind == 0.0f) {
if (process < 80 && slot.height[6] > this->render.position.y) {
slot.alphaB += 2;
}
} else if (kind == 2.0f) {
if (process < 80) {
slot.alphaB += 2;
}
} else if (kind == 3.0f) {
if (process < 170) {
++slot.alphaB;
}
} else if (kind == 5.0f) {
if (process < 80) {
slot.alphaB += 2;
}
} else if (kind == 11.0f || kind == 12.0f || kind == 13.0f || kind == 14.0f) {
if (process < 70) {
++slot.alphaB;
}
} else if (process < 80) {
slot.alphaB += 3;
}
if (process > slot.rotStart && --slot.alphaB <= 0) {
slot.process = 0;
slot.alphaB = 0;
const float respawn = slot.height[7];
if (respawn == 0.0f) {
if (this->render.position.y > slot.height[6]) {
slot.process = 300;
}
slot.vecBNow.x = static_cast<float>(Random(300) - 150);
slot.vecBNow.z = static_cast<float>(Random(300) - 150);
} else if (respawn == 2.0f || respawn == 5.0f) {
slot.vecBNow.x = static_cast<float>(Random(300) - 150);
slot.vecBNow.z = static_cast<float>(Random(300) - 150);
} else if (respawn == 3.0f) {
slot.vecBNow.x = static_cast<float>(Random(300) - 150);
slot.vecBNow.z = static_cast<float>(Random(300) - 150);
const auto& grid = static_cast<CGameMode*>(g_modeMgr.GetGameMode())->scene->terrain->Grid();
const int sink = Random(5);
slot.vecBNow.y = grid.Height(this->render.position.x + slot.vecBNow.x, this->render.position.z + slot.vecBNow.z) - 20.0f - static_cast<float>(sink);
} else {
slot.vecBNow.x = static_cast<float>(Random(200) + 25);
slot.vecBNow.z = static_cast<float>(Random(200) + 25);
if (std::string(static_cast<CGameMode*>(g_modeMgr.GetGameMode())->mapName) == "ecl_fild01.rsw") {
slot.vecBNow.x = static_cast<float>(Random(400) + 25);
slot.vecBNow.z = static_cast<float>(Random(400) + 25);
}
if (Random(2) == 0) {
slot.vecBNow.x *= -1.0f;
}
if (Random(2) == 0) {
slot.vecBNow.z *= -1.0f;
}
}
slot.vecBNow.x = this->render.position.x + slot.vecBNow.x;
slot.vecBNow.z = this->render.position.z + slot.vecBNow.z;
}
for (int pair = 0; pair < 2; ++pair) {
float& current = slot.height[2 * pair];
float& target = slot.height[2 * pair + 1];
int next;
if (target <= current) {
current -= 1.0f;
if (current < 0.0f) {
current = 0.0f;
}
if (target < current) {
continue;
}
const int range = static_cast<int>(current);
int pick = 0;
if (range != 0) {
const int value = std::rand() % range;
pick = value >= 0 ? value : 0;
}
next = 359 - pick;
} else {
current += 1.0f;
if (current > 359.0f) {
current = 359.0f;
}
if (current <= target) {
continue;
}
const int range = static_cast<int>(current);
next = 0;
if (range != 0) {
const int value = std::rand() % range;
next = value >= 0 ? value : 0;
}
}
target = static_cast<float>(next);
}
const float motion = slot.height[7];
const float driftX = g_sinTable[static_cast<int>(slot.height[0])];
if (motion == 3.0f) {
slot.vecBNow.x += driftX * 0.015f;
slot.vecBNow.z += g_sinTable[static_cast<int>(slot.height[2])] * 0.015f;
} else if (motion == 4.0f) {
if (driftX <= 0.0f) {
slot.vecBNow.x -= driftX * 0.2f;
} else {
slot.vecBNow.x += driftX * 0.2f;
}
slot.vecBNow.z += g_sinTable[static_cast<int>(slot.height[2])] * 0.05f;
} else if (motion == 5.0f) {
slot.vecBNow.x += driftX * 0.035f;
slot.vecBNow.z += g_sinTable[static_cast<int>(slot.height[2])] * 0.035f;
} else {
slot.vecBNow.x += driftX * 0.05f;
slot.vecBNow.z += g_sinTable[static_cast<int>(slot.height[2])] * 0.05f;
}
}
slot.height[8] += 1.0f;
if (slot.height[8] >= 360.0f) {
slot.height[8] -= 360.0f;
}
}
return true;
}