Improved KeyframeMesh AABB support

When you use KeyframeMesh::SetPosition(frame, vertex, pos), it will now
invalidate the frame AABB.
Finish() method will now generate automatically invalid AABBs before
interpolating


Former-commit-id: aa4695cee635da73e4a3b70ce22e83b1c3f443f9

include/Nazara/Utility/KeyframeMesh.hpp

@@ -26,6 +26,8 @@ class NAZARA_API NzKeyframeMesh final : public NzSubMesh
 
 		void Finish();
 
+		void GenerateAABBs();
+
 		const NzAxisAlignedBox& GetAABB() const override;
 		nzAnimationType GetAnimationType() const override;
 		unsigned int GetFrameCount() const;

src/Nazara/Utility/KeyframeMesh.cpp

@@ -106,9 +106,34 @@ void NzKeyframeMesh::Finish()
 	}
 	#endif
 
+	GenerateAABBs();
 	InterpolateImpl(0, 0, 0.f);
 }
 
+void NzKeyframeMesh::GenerateAABBs()
+{
+	#if NAZARA_UTILITY_SAFE
+	if (!m_impl)
+	{
+		NazaraError("Keyframe mesh not created");
+		return;
+	}
+	#endif
+
+	unsigned int vertexCount = m_impl->vertexBuffer->GetVertexCount();
+	for (unsigned int i = 0; i < m_impl->frameCount; ++i)
+	{
+		NzAxisAlignedBox& aabb = m_impl->aabb[i+1]; // l'AABB 0 est celle qui est interpolée
+		if (aabb.IsNull())
+		{
+			// Génération de l'AABB selon la position
+			unsigned int index = i*vertexCount;
+			for (unsigned int j = 0; j < vertexCount; ++j)
+				aabb.ExtendTo(m_impl->positions[index+j]);
+		}
+	}
+}
+
 const NzAxisAlignedBox& NzKeyframeMesh::GetAABB() const
 {
 	#if NAZARA_UTILITY_SAFE
@@ -475,6 +500,7 @@ void NzKeyframeMesh::SetPosition(unsigned int frameIndex, unsigned int vertexInd
 	unsigned int index = frameIndex*vertexCount + vertexIndex;
 
 	m_impl->positions[index] = position;
+	m_impl->aabb[frameIndex+1].SetNull(); // Invalidation de l'AABB
 }
 
 void NzKeyframeMesh::SetTangent(unsigned int frameIndex, unsigned int vertexIndex, const NzVector3f& tangent)

src/Nazara/Utility/Loaders/MD2/Loader.cpp

@@ -178,7 +178,6 @@ namespace
 			NzByteSwap(&translate.z, sizeof(float));
 			#endif
 
-			NzAxisAlignedBox aabb;
 			for (unsigned int t = 0; t < header.num_tris; ++t)
 			{
 				for (unsigned int v = 0; v < 3; ++v)
@@ -186,27 +185,25 @@ namespace
 					const md2_vertex& vert = vertices[triangles[t].vertices[v]];
 					NzVector3f position = rotationQuat * NzVector3f(vert.x * scale.x + translate.x, vert.y * scale.y + translate.y, vert.z * scale.z + translate.z);
 
-					// On fait en sorte d'étendre l'AABB pour qu'il contienne ce sommet
-					aabb.ExtendTo(position);
-
 					// On calcule l'indice (On affecte dans le sens inverse)
 					unsigned int vertexIndex = vertexCount - (t*3 + v) - 1;
 
 					// Et on finit par copier les éléments dans le buffer
 					subMesh->SetNormal(f, vertexIndex, md2Normals[vert.n]);
 					subMesh->SetPosition(f, vertexIndex, position);
+				}
+			}
+		}
 
-					if (f == 0)
+		// Définit les coordonnées de textures
+		for (unsigned int t = 0; t < header.num_tris; ++t)
+		{
+			for (unsigned int v = 0; v < 3; ++v)
 			{
-						// On ne définit les coordonnées de texture que lors de la première frame
 				const md2_texCoord& texC = texCoords[triangles[t].texCoords[v]];
-						subMesh->SetTexCoords(vertexIndex, NzVector2f(texC.u / static_cast<float>(header.skinwidth), 1.f - texC.v / static_cast<float>(header.skinheight)));
+				subMesh->SetTexCoords(vertexCount - (t*3 + v) - 1, NzVector2f(texC.u / static_cast<float>(header.skinwidth), 1.f - texC.v / static_cast<float>(header.skinheight)));
 			}
 		}
-			}
-
-			subMesh->SetAABB(f, aabb);
-		}
 
 		subMesh->SetMaterialIndex(0);
 		mesh->AddSubMesh(subMesh.release());