X-Git-Url: https://git.lukelau.me/?p=opengl.git;a=blobdiff_plain;f=model.cpp;h=8046e29434fcf467b29942dc56aa5b60b76b84cf;hp=4c5e2d33278f0120a72f1c07d2c72813bf20b713;hb=ba9c738e8660304aa0341eb44118e63502a4a009;hpb=37cba564a96018a5500e942498d4e48c0ebe73ed

diff --git a/model.cpp b/model.cpp
index 4c5e2d3..8046e29 100644
--- a/model.cpp
+++ b/model.cpp
@@ -5,7 +5,7 @@
 
 Model::Mesh::Mesh(const aiMesh *aiMesh, GLuint progId) {
 
-	std::vector<glm::vec3> vertices, normals;
+	std::vector<glm::vec3> vertices, normals, tangents, bitangents;
 	std::vector<glm::vec2> texCoords;
 
 	for (int i = 0; i < aiMesh->mNumVertices; i++) {
@@ -14,11 +14,20 @@ Model::Mesh::Mesh(const aiMesh *aiMesh, GLuint progId) {
 			vertices.push_back(glm::vec3(v.x, v.y, v.z));
 		}
 		if (aiMesh->HasNormals()) {
-			const aiVector3D v = aiMesh->mNormals[i];
+			aiVector3D v = aiMesh->mNormals[i];
 			normals.push_back(glm::vec3(v.x, v.y, v.z));
 		} else {
 			normals.push_back(glm::vec3(0));
 		}
+		if (aiMesh->HasTangentsAndBitangents()) {
+			aiVector3D t = aiMesh->mTangents[i];
+			tangents.push_back(glm::vec3(t.x, t.y, t.z));
+			aiVector3D b = aiMesh->mBitangents[i];
+			bitangents.push_back(glm::vec3(b.x, b.y, b.z));
+		} else {
+			tangents.push_back(glm::vec3(0));
+			bitangents.push_back(glm::vec3(0));
+		}
 		// check for texture coord set 0
 		if (aiMesh->HasTextureCoords(0)) {
 			const aiVector3D v = aiMesh->mTextureCoords[0][i];
@@ -45,29 +54,41 @@ Model::Mesh::Mesh(const aiMesh *aiMesh, GLuint progId) {
 	glGenVertexArrays(1, &vao);
 	glBindVertexArray(vao);
 	
-	GLuint vbos[4];
-	glGenBuffers(4, vbos);
+	GLuint vbos[6];
+	glGenBuffers(6, vbos);
 	GLuint vertexVbo = vbos[0], normalVbo = vbos[1], texCoordVbo = vbos[2], indicesVbo = vbos[3];
+	GLuint tangentVbo = vbos[4], bitangentVbo = vbos[5];
 	
 	GLuint posLoc = glGetAttribLocation(progId, "vPosition");
-	GLuint normalLoc = glGetAttribLocation(progId, "vNormal");
-	GLuint texCoordLoc = glGetAttribLocation(progId, "vTexCoord");
-	
 	glBindBuffer(GL_ARRAY_BUFFER, vertexVbo);
 	glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(glm::vec3), &vertices[0], GL_STATIC_DRAW);
 	glEnableVertexAttribArray(posLoc);
 	glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
 	
+	GLuint normalLoc = glGetAttribLocation(progId, "vNormal");
 	glBindBuffer(GL_ARRAY_BUFFER, normalVbo);
 	glBufferData(GL_ARRAY_BUFFER, normals.size() * sizeof(glm::vec3), &normals[0], GL_STATIC_DRAW);
 	glEnableVertexAttribArray(normalLoc);
 	glVertexAttribPointer(normalLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
 
+	GLuint texCoordLoc = glGetAttribLocation(progId, "vTexCoord");
 	glBindBuffer(GL_ARRAY_BUFFER, texCoordVbo);
 	glBufferData(GL_ARRAY_BUFFER, texCoords.size() * sizeof(glm::vec2), &texCoords[0], GL_STATIC_DRAW);
 	glEnableVertexAttribArray(texCoordLoc);
 	glVertexAttribPointer(texCoordLoc, 2, GL_FLOAT, GL_FALSE, 0, 0);
 
+	GLuint tangentLoc = glGetAttribLocation(progId, "tangent");
+	glBindBuffer(GL_ARRAY_BUFFER, tangentVbo);
+	glBufferData(GL_ARRAY_BUFFER, tangents.size() * sizeof(glm::vec3), &tangents[0], GL_STATIC_DRAW);
+	glEnableVertexAttribArray(tangentLoc);
+	glVertexAttribPointer(tangentLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
+
+	GLuint bitangentLoc = glGetAttribLocation(progId, "bitangent");
+	glBindBuffer(GL_ARRAY_BUFFER, bitangentVbo);
+	glBufferData(GL_ARRAY_BUFFER, bitangents.size() * sizeof(glm::vec3), &bitangents[0], GL_STATIC_DRAW);
+	glEnableVertexAttribArray(bitangentLoc);
+	glVertexAttribPointer(bitangentLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
+
 	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indicesVbo);
 	glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(GLuint), &indices[0], GL_STATIC_DRAW);
 };
@@ -113,8 +134,7 @@ void Model::Node::draw(	const std::vector<Mesh> &meshes,
 
 Model::Model(const std::string &path, GLuint progId): progId(progId) {
 	const aiScene *scene = importer.ReadFile(path, 
-			aiProcess_Triangulate |
-			aiProcess_GenNormals);
+			aiProcess_Triangulate | aiProcess_CalcTangentSpace | aiProcess_GenNormals);
 	if (!scene) {
 		std::cerr << importer.GetErrorString() << std::endl;
 		exit(1);