Custom model loading

LoadingModels/ImportedModel.cpp

@@ -0,0 +1,91 @@
+#include <fstream>
+#include <sstream>
+#include <glm/glm.hpp>
+#include "ImportedModel.h"
+using namespace std;
+
+ImportedModel::ImportedModel() {}
+
+ImportedModel::ImportedModel(const char *filePath) {
+	ModelImporter modelImporter = ModelImporter();
+	modelImporter.parseOBJ(filePath);
+	numVertices = modelImporter.getNumVertices();
+	std::vector<float> verts = modelImporter.getVertices();
+	std::vector<float> tcs = modelImporter.getTextureCoordinates();
+	std::vector<float> normals = modelImporter.getNormals();
+
+	for (int i = 0; i < numVertices; i++) {
+		vertices.push_back(glm::vec3(verts[i*3], verts[i*3+1], verts[i*3+2]));
+		texCoords.push_back(glm::vec2(tcs[i*2], tcs[i*2+1]));
+		normalVecs.push_back(glm::vec3(normals[i*3], normals[i*3+1], normals[i*3+2]));
+	}
+}
+
+int ImportedModel::getNumVertices() { return numVertices; }
+std::vector<glm::vec3> ImportedModel::getVertices() { return vertices; }
+std::vector<glm::vec2> ImportedModel::getTextureCoords() { return texCoords; }
+std::vector<glm::vec3> ImportedModel::getNormals() { return normalVecs; }
+
+// ---------------------------------------------------------------
+
+ModelImporter::ModelImporter() {}
+
+void ModelImporter::parseOBJ(const char *filePath) {
+	float x, y, z;
+	string content;
+	ifstream fileStream(filePath, ios::in);
+	string line = "";
+	while (!fileStream.eof()) {
+		getline(fileStream, line);
+		if (line.compare(0, 2, "v ") == 0) {
+			stringstream ss(line.erase(0, 1));
+			ss >> x; ss >> y; ss >> z;
+			vertVals.push_back(x);
+			vertVals.push_back(y);
+			vertVals.push_back(z);
+		}
+		if (line.compare(0, 2, "vt") == 0) {
+			stringstream ss(line.erase(0, 2));
+			ss >> x; ss >> y;
+			stVals.push_back(x);
+			stVals.push_back(y);
+		}
+		if (line.compare(0, 2, "vn") == 0) {
+			stringstream ss(line.erase(0, 2));
+			ss >> x; ss >> y; ss >> z;
+			normVals.push_back(x);
+			normVals.push_back(y);
+			normVals.push_back(z);
+		}
+		if (line.compare(0, 2, "f ") == 0) {
+			string oneCorner, v, t, n;
+			stringstream ss(line.erase(0, 2));
+			for (int i = 0; i < 3; i++) {
+				getline(ss, oneCorner, ' ');
+				stringstream oneCornerSS(oneCorner);
+				getline(oneCornerSS, v, '/');
+				getline(oneCornerSS, t, '/');
+				getline(oneCornerSS, n, '/');
+
+				int vertRef = (stoi(v) - 1) * 3;
+				int tcRef = (stoi(t) - 1) * 2;
+				int normRef = (stoi(n) - 1) * 3;
+
+				triangleVerts.push_back(vertVals[vertRef]);
+				triangleVerts.push_back(vertVals[vertRef + 1]);
+				triangleVerts.push_back(vertVals[vertRef + 2]);
+
+				textureCoords.push_back(stVals[tcRef]);
+				textureCoords.push_back(stVals[tcRef + 1]);
+
+				normals.push_back(normVals[normRef]);
+				normals.push_back(normVals[normRef + 1]);
+				normals.push_back(normVals[normRef + 2]);
+			}
+		}
+	}
+}
+int ModelImporter::getNumVertices() { return (triangleVerts.size()/3); }
+std::vector<float> ModelImporter::getVertices() { return triangleVerts; }
+std::vector<float> ModelImporter::getTextureCoordinates() { return textureCoords; }
+std::vector<float> ModelImporter::getNormals() { return normals; }

LoadingModels/ImportedModel.h

@@ -0,0 +1,35 @@
+#include <vector>
+
+class ImportedModel
+{
+private:
+	int numVertices;
+	std::vector<glm::vec3> vertices;
+	std::vector<glm::vec2> texCoords;
+	std::vector<glm::vec3> normalVecs;
+public:
+	ImportedModel();
+	ImportedModel(const char *filePath);
+	int getNumVertices();
+	std::vector<glm::vec3> getVertices();
+	std::vector<glm::vec2> getTextureCoords();
+	std::vector<glm::vec3> getNormals();
+};
+
+class ModelImporter
+{
+private:
+	std::vector<float> vertVals;
+	std::vector<float> triangleVerts;
+	std::vector<float> textureCoords;
+	std::vector<float> stVals;
+	std::vector<float> normals;
+	std::vector<float> normVals;
+public:
+	ModelImporter();
+	void parseOBJ(const char *filePath);
+	int getNumVertices();
+	std::vector<float> getVertices();
+	std::vector<float> getTextureCoordinates();
+	std::vector<float> getNormals();
+};

LoadingModels/LoadingModels.vcxproj

@@ -139,6 +139,7 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="ImportedModel.cpp" />
     <ClCompile Include="main.cpp" />
     <ClCompile Include="Sphere.cpp" />
     <ClCompile Include="Torus.cpp" />
@@ -148,6 +149,7 @@
     <None Include="vertShader.glsl" />
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="ImportedModel.h" />
     <ClInclude Include="ShaderError.h" />
     <ClInclude Include="Sphere.h" />
     <ClInclude Include="Torus.h" />

LoadingModels/LoadingModels.vcxproj.filters

@@ -24,6 +24,9 @@
     <ClCompile Include="Torus.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="ImportedModel.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <None Include="fragShader.glsl">
@@ -46,5 +49,8 @@
     <ClInclude Include="Torus.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="ImportedModel.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>

LoadingModels/main.cpp

@@ -10,9 +10,10 @@
 #include <stack>
 #include "Sphere.h"
 #include "Torus.h"
+#include "ImportedModel.h"
 
 #define numVAOs 1
-#define numVBOs 8
+#define numVBOs 11
 
 GLuint renderingProgram;
 GLuint vao[numVAOs];
@@ -29,6 +30,7 @@ GLuint pyrTex;
 
 Sphere sphere(48);
 Torus torus(1.9,0.4,48);
+ImportedModel shuttle("shuttle.obj");
 
 void setupVertices(void) {
     glGenVertexArrays(1, vao);
@@ -96,10 +98,37 @@ void setupVertices(void) {
 
     glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vbo[7]);
     glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size()*sizeof(float), indices.data(), GL_STATIC_DRAW);
+
+    vertices=shuttle.getVertices();
+    uvs=shuttle.getTextureCoords();
+    normals=shuttle.getNormals();
+
+    pvalues.clear();
+    tvalues.clear();
+    nvalues.clear();
+    for(int i=0;i<shuttle.getNumVertices();i++){
+        pvalues.push_back(vertices[i].x);
+        pvalues.push_back(vertices[i].y);
+        pvalues.push_back(vertices[i].z);
+        tvalues.push_back(uvs[i].s);
+        tvalues.push_back(uvs[i].t);
+        nvalues.push_back(normals[i].x);
+        nvalues.push_back(normals[i].y);
+        nvalues.push_back(normals[i].z);
+    }
+
+    glBindBuffer(GL_ARRAY_BUFFER, vbo[7]);
+    glBufferData(GL_ARRAY_BUFFER, pvalues.size()*sizeof(float), pvalues.data(), GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ARRAY_BUFFER, vbo[8]);
+    glBufferData(GL_ARRAY_BUFFER, tvalues.size()*sizeof(float), tvalues.data(),GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ARRAY_BUFFER, vbo[9]);
+    glBufferData(GL_ARRAY_BUFFER, nvalues.size()*sizeof(float), nvalues.data(), GL_STATIC_DRAW);
 }
 
 void setupTextures(){ 
-    pyrTex=utils::loadTexture("saturn.jpg");
+    pyrTex=utils::loadTexture("spstob_1.jpg");
     glActiveTexture(GL_TEXTURE0);
     glBindTexture(GL_TEXTURE_2D,pyrTex);
     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
@@ -110,7 +139,7 @@ void setupTextures(){
 
 void init(GLFWwindow* window) {
     renderingProgram=utils::createShaderProgram("vertShader.glsl","fragShader.glsl");
-    camera={0.0f,0.0f,-10.0f};
+    camera={0.0f,5.0f,-10.0f};
     setupVertices();
     setupTextures();
 }
@@ -143,6 +172,19 @@ void DrawTorus(){
     glDrawElements(GL_TRIANGLES,torus.getNumIndices(),GL_UNSIGNED_INT,0);
 }
 
+void DrawShuttle(){
+    glUniformMatrix4fv(mvLoc,1,GL_FALSE,glm::value_ptr(mvMat));
+    glUniformMatrix4fv(projLoc,1,GL_FALSE,glm::value_ptr(pMat));
+    glBindBuffer(GL_ARRAY_BUFFER,vbo[7]);
+    glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,0);
+    glBindBuffer(GL_ARRAY_BUFFER,vbo[8]);
+    glVertexAttribPointer(1,2,GL_FLOAT,GL_FALSE,0,0);
+    glBindBuffer(GL_ARRAY_BUFFER,vbo[9]);
+    glVertexAttribPointer(2,3,GL_FLOAT,GL_FALSE,0,0);
+
+    glDrawArrays(GL_TRIANGLES,0,shuttle.getNumVertices());
+}
+
 double lastTime=0;
 
 void display(GLFWwindow* window, double currentTime) {
@@ -168,20 +210,23 @@ void display(GLFWwindow* window, double currentTime) {
     pMat=glm::perspective(utils::degToRad(60),aspect,0.1f,1000.f);
 
     vMat=glm::translate(glm::mat4(1.0f),glm::vec3{camera.x,camera.y,camera.z});
+    vMat=glm::lookAt(glm::vec3{camera.x,camera.y,camera.z},{0,-3,0},{0,1,0});
     
     mMat=glm::translate(glm::mat4(1.0f),{0.f,0.f,0.f});
-    mMat=glm::rotate(mMat,float(currentTime/4),{0.f,1.f,0.4f});
+    mMat=glm::rotate(mMat,float(currentTime/4),{0.f,1.f,-0.2f});
-    mMat=glm::scale(mMat,{3,3,3});
+    mMat=glm::scale(mMat,{8,8,8});
     mvMat=vMat*mMat;
 
-    DrawSphere();
+    //DrawSphere();
 
-    mMat=glm::translate(glm::mat4(1.0f),{0.f,0.f,0.f});
+    DrawShuttle();
+    
+    mMat=glm::translate(glm::mat4(1.0f),{0.f,-3.f,0.f});
     mMat=glm::rotate(mMat,float(currentTime/4),{0.f,1.f,0.4f});
     mMat=glm::scale(mMat,{3,0.1,3});
     mvMat=vMat*mMat;
     
-    DrawTorus();
+    //DrawTorus();
 }
 
 int main(void) {