fixed shader compilation issue, fixed M_PI depending on cmath

camera.cpp

@@ -1,9 +1,7 @@
 #include "camera.h"
 
 #include <glm/ext.hpp>
-#include <cmath>
-
-#define _USE_MATH_DEFINES
+#define M_PI 3.14159265358979323846
 
 Camera::Camera(int width, int height, float fov_y, float near, float far, glm::vec3 pos) :
     m_projectionHasChanged(true),

shader.cpp

@@ -5,6 +5,9 @@
 #include <iostream>
 #include "glassert.h"
 
+const std::string Shader::DEFAULT_VERT = "#version 330\nlayout(location = 0)in vec3 inPosition;\nvoid main(){gl_Position = vec4(inPosition, 1.0);}";
+const std::string Shader::DEFAULT_FRAG = "#version 330\nlayout(location = 0)out vec4 outColor;\nvoid main(){outColor = vec4(1, 0, 0, 1);}";
+
 Shader::Shader(const QString &vertFilename, const QString &fragFilename)
 {
     program = glAssert(glCreateProgram());
@@ -29,8 +32,24 @@ Shader::Shader(const QString &vertFilename, const QString &fragFilename)
         printProgramInfoLog(program);
         program = 0;
     }
+    else
+        std::cout << "Shader successfully compiled" << std::endl;
+
+    glAssert(glDetachShader(program, vertexShaderId));
+    glAssert(glDetachShader(program, fragmentShaderId));
+    glAssert(glDeleteShader(vertexShaderId));
+    glAssert(glDeleteShader(fragmentShaderId));
 }
 
+Shader::~Shader()
+{
+    bool ok;
+    glAssert(ok = glIsProgram(program))
+    if(ok)
+        glAssert(glDeleteProgram(program));
+}
+
+
 QString Shader::fileToString(QString filename)
 {
     QFile f(filename);
@@ -44,7 +63,7 @@ GLuint Shader::createShader(QString filename, GLenum shaderType)
 {
     QString source = fileToString(filename);
     glAssert(GLuint shaderId = glCreateShader(shaderType));
-    const GLchar *data = (const GLchar *)source.constData();
+    const GLchar *data = (const GLchar *)source.toStdString().c_str();
     glAssert(glShaderSource(shaderId, 1, &data, NULL));
 
     glAssert(glCompileShader(shaderId));

shader.h

@@ -2,11 +2,14 @@
 #define SHADER_H
 
 #include <glew/glew.h>
+#include <string>
 
 class QString;
 
 class Shader
 {
+    static const std::string DEFAULT_VERT;
+    static const std::string DEFAULT_FRAG;
     GLuint program;
     QString fileToString(QString filename);
     GLuint createShader(QString filename, GLenum shaderType);
@@ -15,6 +18,7 @@ class Shader
 
 public:
     Shader(const QString &vertFilename, const QString &fragFilename);
+    ~Shader();
     GLuint getProgramId();
 };