added UBO constructor to init a UBO for usage with a shader

include/ACGL/OpenGL/Objects/UniformBuffer.hh

@@ -42,6 +42,8 @@
 namespace ACGL{
 namespace OpenGL{
 
+class ShaderProgram;
+
 class UniformBuffer : public Buffer
 {
     // ========================================================================================================= \/
@@ -56,6 +58,9 @@ public:
          : Buffer(_pBuffer, GL_UNIFORM_BUFFER)
     {}
 
+    //! inits the uniformbuffer to be used with the given shaderprogram, _uboName is the name of this buffer in the shader
+    UniformBuffer( const ptr::shared_ptr<ShaderProgram> &_shaderProgram, const std::string &_uboName );
+
     // ==================================================================================================== \/
     // ============================================================================================ GETTERS \/
     // ==================================================================================================== \/

src/ACGL/OpenGL/Objects/UniformBuffer.cc

@@ -4,12 +4,18 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <ACGL/OpenGL/Objects/UniformBuffer.hh>
+#include <ACGL/OpenGL/Objects/ShaderProgram.hh>
 
 using namespace ACGL;
 using namespace ACGL::OpenGL;
 
 #if (ACGL_OPENGL_VERSION >= 31)
 
-
+UniformBuffer::UniformBuffer( const ptr::shared_ptr<ShaderProgram> &_shaderProgram, const std::string &_uboName ) : Buffer(GL_UNIFORM_BUFFER)
+{
+    reserveMemory(     _shaderProgram->getUniformBlockSize(      _uboName ) );
+    setUniformOffsets( _shaderProgram->getUniformOffsetsOfBlock( _uboName ) ); // to enable intuitive setUniform functions
+    bindBufferBase(    _shaderProgram->getUniformBlockBinding(   _uboName ) ); // bind the UBO to the binding point where the shader expects it
+}
 
 #endif // OpenGL 3.1