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Decompile fn_01727 (SampleModelTexture)

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Batch #18030 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_01727 SampleModelTexture: logic confirmed by peer review

Peer-reviewed-by: Yommy, KWDev, bibinir
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 2026-11-12 09:46:21 +00:00
commit 3e3d18512e
2 changed files with 18 additions and 22 deletions
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2
Source/Contents/Models/ModelNode.h
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@ -12,7 +12,7 @@ struct ModelTextureTransform {
/* 0000 */ float values[5] = {0, 0, 1, 1, 0};
};
void SampleModelTexture(const ModelTextureChannels& channels, float frame, ModelTextureTransform& output);
void SampleModelTexture(ModelTextureChannels& channels, float frame, ModelTextureTransform& output);
class C3dNode {
public:

38
Source/Contents/Models/ModelTextureAnimation.cpp
View file

@ -3,34 +3,30 @@
// OFFSET: 0x00540EA0
// FUNCTION: fn_01727
void SampleModelTexture(const ModelTextureChannels& channels, float frame, ModelTextureTransform& output) {
void SampleModelTexture(ModelTextureChannels& channels, float frame, ModelTextureTransform& output) {
float* targets[5] = {&output.values[0], &output.values[1], &output.values[2], &output.values[3], &output.values[4]};
for (int channel = 0; channel < 5; ++channel) {
const auto found = channels.find(channel);
if (found == channels.end()) {
continue;
}
const auto& keys = found->second;
const int last = keys.back().frame;
if (frame >= static_cast<float>(last)) {
output.values[channel] = keys.back().value;
if (channels.find(channel) == channels.end()) {
continue;
}
std::vector<ModelTextureKey>& keys = channels[channel];
unsigned next = 1;
if (frame < static_cast<float>(keys.back().frame)) {
const unsigned count = keys.size();
for (; next < count; ++next) {
if (frame < static_cast<float>(keys[next].frame)) {
break;
}
}
while (next < keys.size() && !(static_cast<float>(keys[next].frame) > frame)) {
++next;
const int previous = keys[next - 1].frame;
const float amount = (frame - static_cast<float>(previous)) / static_cast<float>(keys[next].frame - previous);
*targets[channel] = (1.0f - amount) * keys[next - 1].value + amount * keys[next].value;
} else {
*targets[channel] = keys.back().value;
}
const int previous = keys[next - 1].frame;
const int difference = keys[next].frame - keys[next - 1].frame;
const float amount = (frame - static_cast<float>(previous)) / static_cast<float>(difference);
const float first = (1.0f - amount) * keys[next - 1].value;
const float second = amount * keys[next].value;
output.values[channel] = first + second;
}
}