e168b4e4a6
Owner-authorized source migration: 31 helper-only translation units were merged into their callers or existing inline headers; both build manifests updated. Includes the preserved source payload, Lua configuration matching wowdecomp, and exact malloca expansion without diagnostic pragmas. 449 native units compiled locally and 449 staged units compiled by the pinned server toolchain. No previously byte-matched function regressed. Compiler mapping diagnostics remain recorded as needs_cleanup, not accepted or peer-confirmed. Existing independent review records are preserved. README.md is intentionally unchanged.
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
#include "Resource/Models/ModelMesh.h"
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#include <cmath>
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#include <map>
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namespace {
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// INLINED
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void Normalize(float* vector) {
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const float squared = (vector[0] * vector[0] + vector[1] * vector[1]) + vector[2] * vector[2];
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const float length = std::sqrt(squared);
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const float inverse = 1.0f / length;
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vector[0] = inverse * vector[0];
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vector[1] = inverse * vector[1];
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vector[2] = inverse * vector[2];
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}
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}
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// OFFSET: 0x00755880
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// FUNCTION: fn_07988
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ModelFace::ModelFace() = default;
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// OFFSET: 0x00551FD0
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// FUNCTION: fn_02011
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void ModelMesh::CalculateNormals() {
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if (this->faceNormals.empty()) {
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this->faceNormals.resize(this->faces.size());
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}
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for (unsigned index = 0; index < this->faces.size(); ++index) {
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const ModelFace& face = this->faces[index];
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const auto& first = this->vertices[face.vertices[0]];
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const auto& second = this->vertices[face.vertices[1]];
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const auto& third = this->vertices[face.vertices[2]];
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const float x1 = first[0] - third[0];
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const float y1 = first[1] - third[1];
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const float z1 = first[2] - third[2];
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const float x2 = second[0] - third[0];
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const float y2 = second[1] - third[1];
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const float z2 = second[2] - third[2];
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auto& normal = this->faceNormals[index];
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normal[0] = y2 * z1 - z2 * y1;
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normal[1] = z2 * x1 - x2 * z1;
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normal[2] = x2 * y1 - y2 * x1;
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Normalize(normal.data());
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}
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std::map<unsigned, std::vector<unsigned>> adjacent;
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for (unsigned face = 0; face < this->faces.size(); ++face) {
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for (unsigned corner = 0; corner < 3; ++corner) {
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adjacent[this->faces[face].vertices[corner]].push_back(face);
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}
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}
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if (this->vertexNormals.empty()) {
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this->vertexNormals.resize(this->faces.size() * 3);
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}
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for (unsigned index = 0; index < this->faces.size(); ++index) {
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const ModelFace& face = this->faces[index];
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for (unsigned corner = 0; corner < 3; ++corner) {
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auto& normal = this->vertexNormals[index * 3 + corner];
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for (unsigned neighbor : adjacent[face.vertices[corner]]) {
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const ModelFace& other = this->faces[neighbor];
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for (std::uint32_t group : face.smoothing) {
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bool matches = false;
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for (std::uint32_t candidate : other.smoothing) {
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if (candidate == group) {
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matches = true;
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break;
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}
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}
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if (matches) {
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normal[0] = normal[0] + this->faceNormals[neighbor][0];
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normal[1] = this->faceNormals[neighbor][1] + normal[1];
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normal[2] = this->faceNormals[neighbor][2] + normal[2];
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}
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}
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}
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}
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}
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for (unsigned index = 0; index < this->faces.size() * 3; ++index) {
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Normalize(this->vertexNormals[index].data());
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}
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}
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