Wavefront OBJ

include/types/animation.h

@@ -1,5 +1,10 @@
 #pragma once
 #include <vector>
-#include <types/keyFrame.h>
+#include <types/bone.h>
+
+struct KeyFrame {
+    uint index;
+    Bone bone;
+};
 
 typedef std::vector<KeyFrame> Animation;

include/types/bone.h

@@ -14,6 +14,7 @@ public:
     const Matrix4x4& getMatrix();
     void setMatrix(const Matrix4x4& m);
     void appendChild(const Bone& bone);
+    uint getDepth(); //The "depth" refers to how far in the bone is on the bonemap. For ex, the fingers would be deeper than the elbow.
     Bone* getParent();
     Bone* getChildByName(const std::string& bName);
     Bone* getChildByNameRecursive(const std::string& bName);

include/types/keyFrame.h

@@ -1,7 +1,2 @@
 #pragma once
 #include <types/bone.h>
-
-struct KeyFrame {
-    uint index;
-    Bone bone;
-};

include/types/model.h

@@ -16,25 +16,32 @@ enum struct ModelType : uint8_t {
     COLLADA = 3, //*Very* complicated.
 };
 
+struct FaceIndices {
+    unsigned int vertexIndex[3];
+    unsigned int texCoordIndex[3];
+};
+
 class SkeletalVertex : public Vertex {
     int8_t joints[3]; //The index of 4 bones that can effect the vertex. 0 represents an empty slot. -1 represents the root bone.
     Vector4 weights; //The 4 weights must total to 1.0
 };
 
 class Model {
+private:
+    void loadOBJ(const std::string& filename);
+    void load(const std::string& file);
 protected:
     std::vector<Vertex> vertices;
     std::vector<uint> indices;
     std::vector<TextureInformation> textureInfo;
-    void load(const std::string& file);
-    void load(const std::string& file, const ModelType& type);
+    void mapFaces(const FaceIndices& facedata, const std::vector<Vector3>& positions, const std::vector<Vector2>& uvs);
 public:
     ModelType type;
     const std::vector<Vertex>& getVertices();
     const std::vector<uint>& getIndices();
     const std::vector<TextureInformation>& getTextureInformation();
     Model() = default;
-    Model(const std::string& file);
+    explicit Model(const std::string& file);
 };
 
 class SkeletalModel : public Model {

include/types/textureInfo.h

@@ -3,6 +3,6 @@
 #include <J3ML/LinearAlgebra.h>
 
 struct TextureInformation {
-    std::string name;
+    std::string path;
     std::vector<Vector2> textureCoordinates;
 };

src/obj.cpp

@@ -0,0 +1,85 @@
+#include <iostream>
+#include <types/model.h>
+
+Vector3 ParseVertexCoordinatesFromOBJ(std::istringstream& stream) {
+    float x, y, z;
+    stream >> x >> y >> z;
+    return {x,y,z};
+}
+
+Vector2 ParseVertexTextureCoordinatesFromOBJ(std::istringstream& stream) {
+    float u, v;
+    stream >> u >> v;
+    return {u,v};
+}
+
+FaceIndices ParseFaceIndicesFromOBJ(std::istringstream& stream) {
+    FaceIndices face{};
+    char slash;
+    for (int i = 0; i < 3; ++i) {
+        unsigned int vI;
+        unsigned int tCI;
+
+        stream >> vI >> slash >> tCI;
+
+        face.vertexIndex[i] = vI;
+        face.texCoordIndex[i] = tCI;
+
+        // Shift vertexindex by 1
+        face.vertexIndex[i]--;
+        // shift texcoordindex by 1
+        face.texCoordIndex[i]--;
+    }
+    return face;
+}
+void Model::loadOBJ(const std::string& filename) {
+    std::ifstream file(filename);
+    if (!file.is_open())
+        std::cerr << filename << " not found." << std::endl;
+
+    std::vector<Vector3> positions;
+    std::vector<Vector2> uvs;
+    std::string line;
+
+    // First: We read every (unique) vertex entry and textureCoord entry from the file.
+    // Then: Use Face data to map the bulk data into correct locations.
+
+    // TODO: Check the assumption that we can **always** read all "v", "vt" etc. tokens  first,
+    // allowing us to perform a second-pass to reconstruct faces?
+
+    while (std::getline(file, line)) {
+        std::istringstream stream(line);
+        std::string prefix;
+        stream >> prefix;
+
+
+        if (prefix == "v") {
+            auto result =  ParseVertexCoordinatesFromOBJ(stream);
+            positions.emplace_back(result);
+        } else if (prefix == "vt") {
+            auto result = ParseVertexTextureCoordinatesFromOBJ(stream);
+            uvs.emplace_back(result);
+        } else if (prefix == "f") {
+            auto result = ParseFaceIndicesFromOBJ(stream);
+            mapFaces(result, positions, uvs);
+        }
+    }
+    file.close();
+};
+
+// map face of model to positions and texture coords
+void Model::mapFaces(const FaceIndices& facedata, const std::vector<Vector3>& positions, const std::vector<Vector2>& uvs) {
+    TextureInformation tInfo{};
+    for (int i = 0; i < 3; ++i) {
+        Vector3 vertex;
+        Vector2 textureCoordinate;
+        vertex = positions[facedata.vertexIndex[i]];
+        textureCoordinate = uvs[facedata.texCoordIndex[i]];
+
+        vertices.push_back(vertex);
+        tInfo.path = "default"; //Placeholder
+        tInfo.textureCoordinates.push_back(textureCoordinate);
+        indices.push_back(static_cast<unsigned int>(indices.size()));
+    }
+    textureInfo.push_back(tInfo);
+}

src/types/bone.cpp

@@ -53,3 +53,17 @@ Bone* Bone::getParent() {
         return this;
     return parent;
 }
+
+uint Bone::getDepth() {
+    if (isRootBone())
+        return 0;
+
+    Bone* b = parent;
+    uint depth = 1;
+    while (b != nullptr && !b->isRootBone()) {
+        b = b->getParent();
+        depth++;
+    }
+    return depth;
+}
+

src/types/model.cpp

@@ -1,64 +1,8 @@
 #include <types/model.h>
 
-struct FaceIndices {
-    unsigned int vertexIndex[3];
-    unsigned int texCoordIndex[3];
-};
-
-Vector3 ParseVertexCoordinatesFromOBJ(std::istringstream& stream) {
-    float x, y, z;
-    stream >> x >> y >> z;
-    return {x,y,z};
-}
-
-Vector2 ParseVertexTextureCoordinatesFromOBJ(std::istringstream& stream) {
-    float u, v;
-    stream >> u >> v;
-    return {u,v};
-}
-
-FaceIndices ParseFaceIndicesFromOBJ(std::istringstream& stream) {
-    FaceIndices face{};
-    char slash;
-    for (int i = 0; i < 3; ++i) {
-        unsigned int vI;
-        unsigned int tCI;
-
-        stream >> vI >> slash >> tCI;
-
-        face.vertexIndex[i] = vI;
-        face.texCoordIndex[i] = tCI;
-
-        // Shift vertexindex by 1
-        face.vertexIndex[i]--;
-        // shift texcoordindex by 1
-        face.texCoordIndex[i]--;
-    }
-    return face;
-}
-
-/*
-// map face of model to positions and texture coords
-void Model::mapfaces(const FaceIndices& facedata, const std::vector<Vector3>& positions, const std::vector<Vector2>& uvs) {
-    for (int i = 0; i < 3; ++i) {
-        Vector3 vertex;
-        Vector2 textureCoordinate;
-        vertex = positions[facedata.vertexIndex[i]];
-        textureCoordinate = uvs[facedata.texCoordIndex[i]];
-
-        vertices.push_back(vertex);
-        textureCoor.push_back(textureCoordinate);
-        indices.push_back(static_cast<unsigned int>(indices.size()));
-    }
-}
-*/
-
-void Model::load(const std::string& file, const ModelType& modelType) {
-    //TODO: Call correct func.
-}
-
 void Model::load(const std::string& file) {
-//TODO: Determine model type and call correct func.
+    if (file.ends_with(".obj"))
+        loadOBJ(file);
 }
 
 const std::vector<Vector3>& Model::getVertices() {