X-Git-Url: https://git.lukelau.me/?p=opengl.git;a=blobdiff_plain;f=model.cpp;h=8046e29434fcf467b29942dc56aa5b60b76b84cf;hp=29f44158e4afc25e48c2b67699c8b42358dabf29;hb=85f8f7278f24fe73fef1a19174376b155319072f;hpb=ba5e08bf25de722d907748ce55b27a45b2b270bf

diff --git a/model.cpp b/model.cpp
index 29f4415..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++) {
@@ -14,16 +14,28 @@ 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];
 			texCoords.push_back(glm::vec2(v.x, v.y));
+		} else {
+			texCoords.push_back(glm::vec2(0));
 		}
+		materialIndex = aiMesh->mMaterialIndex;
 	}
 
 	std::vector<GLuint> indices;
@@ -42,23 +54,41 @@ Model::Mesh::Mesh(const aiMesh *aiMesh, GLuint progId) {
 	glGenVertexArrays(1, &vao);
 	glBindVertexArray(vao);
 	
-	GLuint vbos[3];
-	glGenBuffers(3, vbos);
-	GLuint vertexVbo = vbos[0], normalVbo = vbos[1], indicesVbo = vbos[2];
+	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");
-	
 	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);
 };
@@ -81,26 +111,30 @@ glm::mat4 aiMatrixToMat4(aiMatrix4x4 from) {
 	return to;
 }
 
-void Model::Node::draw(const std::vector<Mesh> &meshes, glm::mat4 parentTrans = glm::mat4(1)) const {
+void Model::Node::draw(	const std::vector<Mesh> &meshes,
+						const std::vector<Material> &materials,
+						glm::mat4 parentTrans = glm::mat4(1)) const {
+
 	GLuint modelLoc = glGetUniformLocation(progId, "model");
 	glm::mat4 m = parentTrans * aiMatrixToMat4(ai.mTransformation) * model;
 	
 	for (unsigned int i: meshIndices) {
 		const Mesh &mesh = meshes[i];
-
 		glBindVertexArray(mesh.vao);
 
+		Material material = materials[mesh.materialIndex];
+		material.bind();
+		
 		glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(m));
 
 		glDrawElements(GL_TRIANGLES, mesh.numIndices, GL_UNSIGNED_INT, 0);
 	}
-	for (Node *child: children) child->draw(meshes, m);
+	for (Node *child: children) child->draw(meshes, materials, m);
 }
 
 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);
@@ -111,22 +145,16 @@ Model::Model(const std::string &path, GLuint progId): progId(progId) {
 		meshes.push_back(Mesh(mesh, progId));
 	}
 
-	for (int i = 0; i < scene->mNumMaterials; i++) {
+	for (unsigned int i = 0; i < scene->mNumMaterials; i++) {
 		const aiMaterial &material = *scene->mMaterials[i];
-
-		for (int j = 0; j < material.GetTextureCount(aiTextureType_DIFFUSE); j++) {
-			aiString path;
-			material.GetTexture(aiTextureType_DIFFUSE, j, &path);
-		}
-		std::cout << material.GetTextureCount(aiTextureType_DIFFUSE) << std::endl;
-		std::cout << path.C_Str() << std::endl;
+		materials.push_back(Material(material, progId));
 	}
 
 	root = new Node(*(scene->mRootNode), progId);
 }
 
 void Model::draw() const {
-	root->draw(meshes);
+	root->draw(meshes, materials);
 }
 
 Model::Node* Model::find(const std::string &name) {