211 lines
7.2 KiB
C++
211 lines
7.2 KiB
C++
#include "merc_replacement.h"
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using namespace gltf_util;
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namespace decompiler {
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void extract(const std::string& name,
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MercExtractData& out,
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const tinygltf::Model& model,
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const std::vector<NodeWithTransform>& all_nodes,
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u32 index_offset,
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u32 vertex_offset,
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u32 tex_offset) {
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ASSERT(out.new_vertices.empty());
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std::map<int, tfrag3::MercDraw> draw_by_material;
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int mesh_count = 0;
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int prim_count = 0;
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for (const auto& n : all_nodes) {
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const auto& node = model.nodes[n.node_idx];
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if (node.extras.Has("set_invisible") && node.extras.Get("set_invisible").Get<int>()) {
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continue;
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}
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if (node.mesh >= 0) {
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const auto& mesh = model.meshes[node.mesh];
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mesh_count++;
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for (const auto& prim : mesh.primitives) {
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prim_count++;
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// extract index buffer
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std::vector<u32> prim_indices = gltf_util::gltf_index_buffer(
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model, prim.indices, out.new_vertices.size() + vertex_offset);
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ASSERT_MSG(prim.mode == TINYGLTF_MODE_TRIANGLES, "Unsupported triangle mode");
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// extract vertices
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auto verts =
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gltf_util::gltf_vertices(model, prim.attributes, n.w_T_node, true, true, mesh.name);
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out.new_vertices.insert(out.new_vertices.end(), verts.vtx.begin(), verts.vtx.end());
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out.new_colors.insert(out.new_colors.end(), verts.vtx_colors.begin(),
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verts.vtx_colors.end());
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out.normals.insert(out.normals.end(), verts.normals.begin(), verts.normals.end());
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ASSERT(out.new_colors.size() == out.new_vertices.size());
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// TODO: just putting it all in one material
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auto& draw = draw_by_material[prim.material];
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draw.mode = gltf_util::make_default_draw_mode(); // todo rm
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draw.tree_tex_id = 0; // todo rm
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draw.num_triangles += prim_indices.size() / 3;
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draw.no_strip = true;
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draw.index_count = prim_indices.size();
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draw.first_index = index_offset + out.new_indices.size();
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out.new_indices.insert(out.new_indices.end(), prim_indices.begin(), prim_indices.end());
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}
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}
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}
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tfrag3::MercEffect e;
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out.new_model.name = name;
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out.new_model.max_bones = 120;
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out.new_model.max_draws = 200;
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for (const auto& [mat_idx, d_] : draw_by_material) {
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e.all_draws.push_back(d_);
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auto& draw = e.all_draws.back();
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draw.mode = make_default_draw_mode();
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if (mat_idx == -1) {
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lg::warn("Draw had a material index of -1, using default texture.");
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draw.tree_tex_id = 0;
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continue;
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}
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const auto& mat = model.materials[mat_idx];
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int tex_idx = mat.pbrMetallicRoughness.baseColorTexture.index;
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if (tex_idx == -1) {
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lg::warn("Material {} has no texture, using default texture.", mat.name);
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draw.tree_tex_id = 0;
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continue;
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}
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const auto& tex = model.textures[tex_idx];
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ASSERT(tex.sampler >= 0);
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ASSERT(tex.source >= 0);
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draw.mode = draw_mode_from_sampler(model.samplers.at(tex.sampler));
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const auto& img = model.images[tex.source];
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draw.tree_tex_id = tex_offset + texture_pool_add_texture(&out.tex_pool, img);
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}
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lg::info("total of {} unique materials", e.all_draws.size());
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e.has_mod_draw = false;
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out.new_model.effects.push_back(e);
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out.new_model.effects.push_back(e);
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out.new_model.effects.push_back(e);
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out.new_model.effects.push_back(e);
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lg::info("Merged {} meshes and {} prims into {} vertices", mesh_count, prim_count,
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out.new_vertices.size());
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}
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const tfrag3::MercVertex& find_closest(const std::vector<tfrag3::MercVertex>& old,
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float x,
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float y,
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float z) {
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float best_dist = 1e10;
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int best_idx = 0;
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for (int i = 0; i < old.size(); i++) {
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auto& v = old[i];
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float dx = v.pos[0] - x;
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float dy = v.pos[1] - y;
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float dz = v.pos[2] - z;
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float dist = (dx * dx) + (dy * dy) + (dz * dz);
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if (dist < best_dist) {
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best_dist = dist;
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best_idx = i;
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}
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}
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return old[best_idx];
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}
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void merc_convert_replacement(MercSwapData& out,
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const MercExtractData& in,
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const std::vector<tfrag3::MercVertex>& old_verts) {
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out.new_model = in.new_model;
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out.new_indices = in.new_indices;
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out.new_textures = in.tex_pool.textures_by_idx;
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// convert vertices
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for (size_t i = 0; i < in.new_vertices.size(); i++) {
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const auto& y = in.new_vertices[i];
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const auto& copy_from = find_closest(old_verts, y.x, y.y, y.z);
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auto& x = out.new_vertices.emplace_back();
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x.pos[0] = y.x;
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x.pos[1] = y.y;
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x.pos[2] = y.z;
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x.normal[0] = copy_from.normal[0];
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x.normal[1] = copy_from.normal[1];
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x.normal[2] = copy_from.normal[2];
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x.weights[0] = copy_from.weights[0];
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x.weights[1] = copy_from.weights[1];
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x.weights[2] = copy_from.weights[2];
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x.st[0] = y.s;
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x.st[1] = y.t;
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x.rgba[0] = in.new_colors[i][0];
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x.rgba[1] = in.new_colors[i][1];
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x.rgba[2] = in.new_colors[i][2];
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x.rgba[3] = in.new_colors[i][3];
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x.mats[0] = copy_from.mats[0];
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x.mats[1] = copy_from.mats[1];
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x.mats[2] = copy_from.mats[2];
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}
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}
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void merc_convert_custom(MercSwapData& out, const MercExtractData& in) {
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out.new_model = in.new_model;
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out.new_indices = in.new_indices;
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out.new_textures = in.tex_pool.textures_by_idx;
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// convert vertices
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for (size_t i = 0; i < in.new_vertices.size(); i++) {
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const auto& y = in.new_vertices[i];
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auto& x = out.new_vertices.emplace_back();
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x.pos[0] = y.x;
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x.pos[1] = y.y;
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x.pos[2] = y.z;
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x.normal[0] = in.normals.at(i).x();
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x.normal[1] = in.normals.at(i).y();
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x.normal[2] = in.normals.at(i).z();
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x.weights[0] = 1.0f;
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x.weights[1] = 0.0f;
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x.weights[2] = 0.0f;
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x.st[0] = y.s;
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x.st[1] = y.t;
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x.rgba[0] = in.new_colors[i][0];
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x.rgba[1] = in.new_colors[i][1];
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x.rgba[2] = in.new_colors[i][2];
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x.rgba[3] = in.new_colors[i][3];
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x.mats[0] = 3;
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x.mats[1] = 0;
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x.mats[2] = 0;
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}
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}
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MercSwapData load_replacement_merc_model(const std::string& name,
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u32 current_idx_count,
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u32 current_vtx_count,
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u32 current_tex_count,
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const std::string& path,
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const std::vector<tfrag3::MercVertex>& old_verts,
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bool custom_mdl) {
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MercSwapData result;
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lg::info("Reading gltf mesh: {}", path);
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tinygltf::TinyGLTF loader;
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tinygltf::Model model;
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std::string err, warn;
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bool res = loader.LoadBinaryFromFile(&model, &err, &warn, path);
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ASSERT_MSG(warn.empty(), warn.c_str());
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ASSERT_MSG(err.empty(), err.c_str());
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ASSERT_MSG(res, "Failed to load GLTF file!");
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auto all_nodes = flatten_nodes_from_all_scenes(model);
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MercExtractData extract_data;
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extract(name, extract_data, model, all_nodes, current_idx_count, current_vtx_count,
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current_tex_count);
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if (custom_mdl) {
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merc_convert_custom(result, extract_data);
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} else {
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merc_convert_replacement(result, extract_data, old_verts);
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}
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return result;
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}
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} // namespace decompiler
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