338 lines
9.9 KiB
C++
338 lines
9.9 KiB
C++
// Copyright (C) 2012 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Utility module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Utility/Loaders/MD2.hpp>
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#include <Nazara/Core/Endianness.hpp>
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#include <Nazara/Core/Error.hpp>
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#include <Nazara/Core/InputStream.hpp>
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#include <Nazara/Math/Basic.hpp>
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#include <Nazara/Math/Quaternion.hpp>
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#include <Nazara/Utility/Animation.hpp>
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#include <Nazara/Utility/KeyframeMesh.hpp>
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#include <Nazara/Utility/Mesh.hpp>
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#include <Nazara/Utility/Loaders/MD2/Constants.hpp>
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#include <cstddef>
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#include <cstring>
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#include <memory>
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#include <Nazara/Utility/Debug.hpp>
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namespace
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{
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/// Loader de mesh
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bool CheckMesh(NzInputStream& stream, const NzMeshParams& parameters)
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{
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NazaraUnused(parameters);
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nzUInt32 magic[2];
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if (stream.Read(&magic[0], 2*sizeof(nzUInt32)) != 2*sizeof(nzUInt32))
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return false;
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#ifdef NAZARA_BIG_ENDIAN
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NzByteSwap(&magic[0], sizeof(nzUInt32));
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NzByteSwap(&magic[1], sizeof(nzUInt32));
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#endif
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return magic[0] == md2Ident && magic[1] == 8;
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}
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bool LoadMesh(NzMesh* mesh, NzInputStream& stream, const NzMeshParams& parameters)
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{
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md2_header header;
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if (stream.Read(&header, sizeof(md2_header)) != sizeof(md2_header))
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{
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NazaraError("Failed to read header");
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return false;
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}
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#ifdef NAZARA_BIG_ENDIAN
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NzByteSwap(&header.skinwidth, sizeof(nzUInt32));
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NzByteSwap(&header.skinheight, sizeof(nzUInt32));
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NzByteSwap(&header.framesize, sizeof(nzUInt32));
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NzByteSwap(&header.num_skins, sizeof(nzUInt32));
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NzByteSwap(&header.num_vertices, sizeof(nzUInt32));
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NzByteSwap(&header.num_st, sizeof(nzUInt32));
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NzByteSwap(&header.num_tris, sizeof(nzUInt32));
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NzByteSwap(&header.num_glcmds, sizeof(nzUInt32));
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NzByteSwap(&header.num_frames, sizeof(nzUInt32));
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NzByteSwap(&header.offset_skins, sizeof(nzUInt32));
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NzByteSwap(&header.offset_st, sizeof(nzUInt32));
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NzByteSwap(&header.offset_tris, sizeof(nzUInt32));
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NzByteSwap(&header.offset_frames, sizeof(nzUInt32));
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NzByteSwap(&header.offset_glcmds, sizeof(nzUInt32));
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NzByteSwap(&header.offset_end, sizeof(nzUInt32));
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#endif
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if (stream.GetSize() < header.offset_end)
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{
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NazaraError("Incomplete MD2 file");
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return false;
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}
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/// Création du mesh
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// Animé ou statique, c'est la question
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///FIXME: Le loader ne traite pas correctement le cas d'un mesh statique
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if (parameters.animated)
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mesh->CreateKeyframe();
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else
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mesh->CreateStatic();
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if (!mesh->IsValid()) // Ne devrait jamais échouer
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{
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NazaraInternalError("Failed to create mesh");
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return false;
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}
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mesh->SetAnimation(stream.GetPath()); // Même fichier
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/// Chargement des skins
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if (header.num_skins > 0)
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{
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mesh->SetMaterialCount(header.num_skins);
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stream.SetCursorPos(header.offset_skins);
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{
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NzString baseDir = stream.GetDirectory();
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char skin[68];
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for (unsigned int i = 0; i < header.num_skins; ++i)
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{
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stream.Read(skin, 68*sizeof(char));
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mesh->SetMaterial(i, baseDir + skin);
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}
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}
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}
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/// Chargement des submesh
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// Actuellement le loader ne charge qu'un submesh
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// FIXME: Utiliser les commandes OpenGL ?
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unsigned int vertexCount = header.num_tris * 3;
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std::unique_ptr<NzVertexBuffer> vertexBuffer(new NzVertexBuffer(NzMesh::GetDeclaration(), vertexCount, parameters.storage, nzBufferUsage_Dynamic));
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std::unique_ptr<NzKeyframeMesh> subMesh(new NzKeyframeMesh(mesh));
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if (!subMesh->Create(vertexBuffer.get(), header.num_frames))
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{
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NazaraError("Failed to create SubMesh");
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return false;
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}
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vertexBuffer->SetPersistent(false);
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vertexBuffer.release();
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/// Lecture des triangles
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std::vector<md2_triangle> triangles(header.num_tris);
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stream.SetCursorPos(header.offset_tris);
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stream.Read(&triangles[0], header.num_tris*sizeof(md2_triangle));
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#ifdef NAZARA_BIG_ENDIAN
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for (unsigned int i = 0; i < header.num_tris; ++i)
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{
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NzByteSwap(&triangles[i].vertices[0], sizeof(nzUInt16));
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NzByteSwap(&triangles[i].texCoords[0], sizeof(nzUInt16));
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NzByteSwap(&triangles[i].vertices[1], sizeof(nzUInt16));
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NzByteSwap(&triangles[i].texCoords[1], sizeof(nzUInt16));
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NzByteSwap(&triangles[i].vertices[2], sizeof(nzUInt16));
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NzByteSwap(&triangles[i].texCoords[2], sizeof(nzUInt16));
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}
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#endif
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/// Lecture des coordonnées de texture
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std::vector<md2_texCoord> texCoords(header.num_st);
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// Lecture des coordonnées de texture
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stream.SetCursorPos(header.offset_st);
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stream.Read(&texCoords[0], header.num_st*sizeof(md2_texCoord));
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#ifdef NAZARA_BIG_ENDIAN
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for (unsigned int i = 0; i < header.num_st; ++i)
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{
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NzByteSwap(&texCoords[i].u, sizeof(nzInt16));
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NzByteSwap(&texCoords[i].v, sizeof(nzInt16));
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}
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#endif
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/// Chargement des frames
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stream.SetCursorPos(header.offset_frames);
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// Pour que le modèle soit correctement aligné, on génère un quaternion que nous appliquerons à chacune des vertices
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NzQuaternionf rotationQuat = NzEulerAnglesf(-90.f, 90.f, 0.f);
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std::unique_ptr<md2_vertex[]> vertices(new md2_vertex[header.num_vertices]);
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for (unsigned int f = 0; f < header.num_frames; ++f)
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{
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NzVector3f scale, translate;
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stream.Read(scale, sizeof(NzVector3f));
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stream.Read(translate, sizeof(NzVector3f));
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stream.Read(nullptr, 16*sizeof(char));
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stream.Read(vertices.get(), header.num_vertices*sizeof(md2_vertex));
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#ifdef NAZARA_BIG_ENDIAN
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NzByteSwap(&scale.x, sizeof(float));
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NzByteSwap(&scale.y, sizeof(float));
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NzByteSwap(&scale.z, sizeof(float));
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NzByteSwap(&translate.x, sizeof(float));
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NzByteSwap(&translate.y, sizeof(float));
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NzByteSwap(&translate.z, sizeof(float));
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#endif
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for (unsigned int t = 0; t < header.num_tris; ++t)
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{
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for (unsigned int v = 0; v < 3; ++v)
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{
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const md2_vertex& vert = vertices[triangles[t].vertices[v]];
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NzVector3f position = rotationQuat * NzVector3f(vert.x * scale.x + translate.x, vert.y * scale.y + translate.y, vert.z * scale.z + translate.z);
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// On calcule l'indice (On affecte dans le sens inverse)
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unsigned int vertexIndex = vertexCount - (t*3 + v) - 1;
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// Et on finit par copier les éléments dans le buffer
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subMesh->SetNormal(f, vertexIndex, md2Normals[vert.n]);
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subMesh->SetPosition(f, vertexIndex, position);
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}
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}
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}
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// Définit les coordonnées de textures
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for (unsigned int t = 0; t < header.num_tris; ++t)
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{
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for (unsigned int v = 0; v < 3; ++v)
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{
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const md2_texCoord& texC = texCoords[triangles[t].texCoords[v]];
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subMesh->SetTexCoords(vertexCount - (t*3 + v) - 1, NzVector2f(texC.u / static_cast<float>(header.skinwidth), 1.f - texC.v / static_cast<float>(header.skinheight)));
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}
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}
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subMesh->SetMaterialIndex(0);
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mesh->AddSubMesh(subMesh.release());
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return true;
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}
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/// Loader d'animations
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bool CheckAnim(NzInputStream& stream, const NzAnimationParams& parameters)
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{
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NazaraUnused(parameters);
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nzUInt32 magic[2];
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if (stream.Read(&magic[0], 2*sizeof(nzUInt32)) != 2*sizeof(nzUInt32))
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return false;
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#ifdef NAZARA_BIG_ENDIAN
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NzByteSwap(&magic[0], sizeof(nzUInt32));
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NzByteSwap(&magic[1], sizeof(nzUInt32));
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#endif
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return magic[0] == md2Ident && magic[1] == 8;
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}
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bool LoadAnim(NzAnimation* animation, NzInputStream& stream, const NzAnimationParams& parameters)
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{
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md2_header header;
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if (stream.Read(&header, sizeof(md2_header)) != sizeof(md2_header))
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{
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NazaraError("Failed to read header");
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return false;
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}
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#ifdef NAZARA_BIG_ENDIAN
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NzByteSwap(&header.framesize, sizeof(nzUInt32));
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NzByteSwap(&header.num_frames, sizeof(nzUInt32));
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NzByteSwap(&header.offset_frames, sizeof(nzUInt32));
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NzByteSwap(&header.offset_end, sizeof(nzUInt32));
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#endif
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if (stream.GetSize() < header.offset_end)
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{
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NazaraError("Incomplete MD2 file");
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return false;
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}
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unsigned int startFrame = std::min(parameters.startFrame, static_cast<unsigned int>(header.num_frames-1));
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unsigned int endFrame = std::min(parameters.endFrame, static_cast<unsigned int>(header.num_frames-1));
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unsigned int frameCount = endFrame - startFrame + 1;
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if (!animation->CreateKeyframe(frameCount))
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{
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NazaraInternalError("Failed to create animaton");
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return false;
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}
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// Le MD2 requiert une interpolation de la dernière à la première frame (en cas de loop)
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animation->EnableLoopPointInterpolation(true);
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// Décodage des séquences
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///TODO: Optimiser le calcul
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char last[16];
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stream.SetCursorPos(header.offset_frames + startFrame*header.framesize + 2*sizeof(NzVector3f));
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stream.Read(last, 16*sizeof(char));
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int pos = std::strlen(last)-1;
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for (unsigned int j = 0; j < 2; ++j)
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{
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if (!std::isdigit(last[pos]))
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break;
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pos--;
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}
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last[pos+1] = '\0';
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NzSequence sequence;
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sequence.firstFrame = startFrame;
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sequence.frameCount = 0;
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sequence.frameRate = 10; // Par défaut pour les animations MD2
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sequence.name = last;
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char name[16];
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for (unsigned int i = startFrame; i <= endFrame; ++i)
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{
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stream.SetCursorPos(header.offset_frames + i*header.framesize + 2*sizeof(NzVector3f));
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stream.Read(name, 16*sizeof(char));
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pos = std::strlen(name)-1;
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for (unsigned int j = 0; j < 2; ++j)
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{
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if (!std::isdigit(name[pos]))
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break;
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pos--;
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}
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name[pos+1] = '\0';
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if (std::strcmp(name, last) != 0) // Si les deux frames n'ont pas le même nom
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{
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std::strcpy(last, name);
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// Alors on enregistre la séquence actuelle
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animation->AddSequence(sequence);
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// Et on initialise la séquence suivante
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sequence.firstFrame = i;
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sequence.frameCount = 0;
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sequence.name = last;
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}
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sequence.frameCount++;
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}
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// On ajoute la dernière frame (Qui n'a pas été traitée par la boucle)
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animation->AddSequence(sequence);
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return true;
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}
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}
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void NzLoaders_MD2_Register()
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{
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NzAnimationLoader::RegisterLoader("md2", CheckAnim, LoadAnim);
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NzMeshLoader::RegisterLoader("md2", CheckMesh, LoadMesh);
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}
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void NzLoaders_MD2_Unregister()
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{
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NzAnimationLoader::UnregisterLoader("md2", CheckAnim, LoadAnim);
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NzMeshLoader::UnregisterLoader("md2", CheckMesh, LoadMesh);
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}
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