wireframe

src/graphics.cpp

@@ -55,13 +55,14 @@ string ShaderProgram::baseName() {
  * @param vertexSource C style string with NULL termination
  * @param fragSource C style string with NULL termination
  */
-ShaderProgram::ShaderProgram(Base base, string vertexSource,
-                             string fragSource) {
+ShaderProgram::ShaderProgram(Base base, string vertexSource, string fragSource,
+                             bool wireframe /* = false */) {
   int success;
   char infoLog[512];
   const char *vertexSource_c = vertexSource.c_str();
   const char *fragSource_c = fragSource.c_str();
   this->base = base;
+  this->wireframe = wireframe;
   BOOST_LOG_TRIVIAL(info) << "With base program \"" << this->baseName() << "\"";
   // NOTE: char arrays and char pointers are not actually the same.
   // glShaderSource requires a char[] as it appears. We pass the
@@ -154,8 +155,9 @@ int ShaderProgram::run(GLFWwindow *window) {
     // VBOs) when it's not directly necessary.
     glBindVertexArray(0);
 
-    // uncomment this call to draw in wireframe polygons.
-    // glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+    if (this->wireframe) {
+      glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+    }
     while (!glfwWindowShouldClose(window)) {
       // input
       // -----
@@ -168,7 +170,8 @@ int ShaderProgram::run(GLFWwindow *window) {
 
       // draw our first triangle
       glUseProgram(this->program);
-      glBindVertexArray(VAOTriangle); // seeing as we only have a single VAO there's no
+      glBindVertexArray(
+          VAOTriangle); // seeing as we only have a single VAO there's no
                         // need to bind it every time, but we'll do so to
                         // keep things a bit more organized
       glDrawArrays(GL_TRIANGLES, 0, 3);
@@ -235,8 +238,9 @@ int ShaderProgram::run(GLFWwindow *window) {
     // VBOs) when it's not directly necessary.
     glBindVertexArray(0);
 
-    // uncomment this call to draw in wireframe polygons.
-    // glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+    if (this->wireframe) {
+      glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+    }
     while (!glfwWindowShouldClose(window)) {
       // input
       // -----
@@ -277,6 +281,9 @@ int ShaderProgram::run(GLFWwindow *window) {
   {
     // use the compiled shader
     glUseProgram(this->program);
+    if (this->wireframe) {
+      glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+    }
     while (!glfwWindowShouldClose(window)) {
       processInput(window);
 

src/graphics.hpp

@@ -10,16 +10,18 @@ public:
   enum Base { Empty, Triangle, Polygons };
   std::string baseName();
   static Base baseFromName(std::string name);
-  ShaderProgram(Base base, std::string vertexSource, std::string fragSource);
-  int run(GLFWwindow* window);
+  ShaderProgram(Base base, std::string vertexSource, std::string fragSource,
+                bool wireframe = false);
+  int run(GLFWwindow *window);
 
 protected:
   unsigned int vertex;
+  bool wireframe;
   unsigned int frag;
   Base base;
   unsigned int program;
 };
-int mainWindow(ShaderProgram* shaderProgramm, GLFWwindow* window);
-GLFWwindow* initGl();
+int mainWindow(ShaderProgram *shaderProgramm, GLFWwindow *window);
+GLFWwindow *initGl();
 void processInput(GLFWwindow *window);
 #endif

src/main.cpp

@@ -18,7 +18,8 @@ int main(int argc, char **argv) {
   po::options_description desc("Available options");
   desc.add_options()("help,h", "show help")("verbose,v", "more verbose output")(
       "vert", po::value<string>()->required(), "vertex shader file")(
-      "frag", po::value<string>()->required(), "fragment shader file")(
+      "frag", po::value<string>()->required(),
+      "fragment shader file")("wire,w", "activate wireframe mode")(
       "base,b", po::value<string>()->required(), "base program");
 
   /* unused for now */
@@ -82,11 +83,11 @@ int main(int argc, char **argv) {
   string buf;
   string vert;
   string frag;
-  while(!fvert.eof()) {
+  while (!fvert.eof()) {
     getline(fvert, buf);
     vert.append(buf + "\n");
   }
-  while(!ffrag.eof()) {
+  while (!ffrag.eof()) {
     getline(ffrag, buf);
     frag.append(buf + "\n");
   }
@@ -104,7 +105,7 @@ int main(int argc, char **argv) {
   BOOST_LOG_TRIVIAL(trace) << "Creating ShaderProgram";
 
   // TODO: determinde ShaderProgram::Base with a CLI arg
-  ShaderProgram shaderProgram(base, vert, frag);
+  ShaderProgram shaderProgram(base, vert, frag, !vm["wire"].empty());
 
   /* Run our main program */
   BOOST_LOG_TRIVIAL(trace) << "Starting mainWindow";
@@ -117,7 +118,8 @@ int main(int argc, char **argv) {
 void help(char *prog, po::options_description desc) {
   cout << "Usage:" << endl
        << prog
-       << " [-vh] [--vert] shaders/vertex.glsl [--frag] shaders/fragment.glsl"
+       << " [-vwh] \\\n\t--vert shaders/vertex.glsl \\\n\t--frag "
+          "shaders/fragment.glsl \\\n\t--base BASE_PROGRAM"
        << endl
        << endl
        << "return values:" << endl
@@ -132,6 +134,7 @@ void help(char *prog, po::options_description desc) {
        << "base programs:" << endl
        << "Empty\t\t-\tEmpty window with colored background" << endl
        << "Triangle\t-\tA static Triangle" << endl
+       << "Polygons\t-\tA small amount of polygons" << endl
        << endl
        << endl
        << desc << endl;