added documentation all over the place

J/J.h

@@ -8,10 +8,14 @@
 
 #import <Foundation/Foundation.h>
 
+// Bring some of the C++11 stuff to us.
 #import "to_string.h"
 #import "array.h"
 
+// OpenGL functionality
 #import "shader.h"
 #import "fbo.h"
+
+// Other utilities
 #import "interpolator.h"
 

J/array.h

@@ -6,6 +6,10 @@
 //  Copyright 2011 Vadovas. All rights reserved.
 //
 
+/*
+ Luckily for us there is tr1, we use the std::array from there.
+ */
+
 #ifndef J_array_h
 #define J_array_h
 

J/basic.h

@@ -6,6 +6,12 @@
 //  Copyright 2011 Vadovas. All rights reserved.
 //
 
+/*
+ This file will be included by all headers that need opengl. It alse defines a useful error checking function.
+ 
+ There may be some notes here and there (especially in the fbo and shader headers) about OpenGL ES2, those notes can be educational ;).
+ */
+
 #ifndef J_basic_h
 #define J_basic_h
 

J/fbo.h

@@ -6,6 +6,14 @@
 //  Copyright 2011 Vadovas. All rights reserved.
 //
 
+/*
+ Like the shader object, all work is done in the constructor and destructor. So copying a fbo object is impossible, use smart pointers instead. The standard constructor only takes a width and height. Texture settings and the presence of a depth buffer are preset and cannot be changed (since one probably wants those things, and there is not a lot of flexibility in ES2).
+ 
+ The other constructor (wich is defined in fbo.mm) is to make EAGLView more compact, it makes a fbo in a given context and with a given layer (no texture will be generated, so you cannot use this fbo for texture lookup).
+ 
+ Just like the shader, this class has begin() and end() functions.
+ */
+
 #ifndef FBO_H
 #define FBO_H
 
@@ -21,7 +29,7 @@
 
 
 // TODO: more error checking in debug build.
-// TODO: make texture class? for easier switching between linear/nearest interpolation for example
+// TODO: make texture class? for easier switching between linear/nearest interpolation for example. (also affects shader::set_texture).
 // NOTE: stencil attachment is not supported
 
 namespace J {
@@ -60,6 +68,7 @@ public:
 	}
     
     // ctor from EAGLContext, not using textures, so you cannot use it as lookup, only as renderer.
+	// this one is defined in fbo.mm, because it uses Quartz and objC / iOS stuff.
     fbo(EAGLContext* context, CAEAGLLayer* layer);
     
 	~fbo() {

J/fbo.mm

@@ -11,6 +11,7 @@
 #import <QuartzCore/QuartzCore.h>
 
 namespace J {
+	// NOTE: this function is merely to make the EAGLView more compact. It is really a objC / iOS thing.
     fbo::fbo(EAGLContext* context, CAEAGLLayer* layer) : width(0), height(0), fbo_number(0), renderbuffers(), texture_id(0){
         glGenFramebuffers(1, &fbo_number);
         bind();

J/shader.h

@@ -6,6 +6,14 @@
 //  Copyright 2011 Vadovas. All rights reserved.
 //
 
+/*
+ This is a very basic shader class. The compilation and linking is done in the constructor, and deletion is don in the destructor. As a result, you can't copy a shader, use smart pointers instead. Because OpenGL ES2 uses attribute-indices at link-time, you have to specify your attributes in the constructor (this is a bit cumbersome).
+ 
+ There are a lot of uniform setters, for both values and array's, they are called set_uniform() for all types. For matrices a additional parameter (trans) can be given, but in ES2 this value has to be false. It's still a parameter to avoid ambiguity, because the overload works with c-style arrays (vector4 is not distinguishable from matrix2x2). A fix would be to introduce types like vector4 and matrix2x2 and such, but Astrant already has those, so I refrain to do that.
+ 
+ Using the setters should only be done between the begin() and end() functions.
+ */
+
 #ifndef SHADER_H
 #define SHADER_H
 
@@ -19,17 +27,17 @@
 #include "basic.h"
 #include "array.h"
 
-// TODO: do glValidateProgram, like in the OpenGL template (see bottom)
 // TODO: add error checking at set_uniforms?
 // TODO: use an uniform map? (benchmark first!)
-// TODO: allow arrays is uniforms (now all counts are 1)
-// TODO: matrix attributes are not handled well (they take up 4 indices in the attributes)
+// TODO: allow arrays in uniforms (now all counts are 1). To make this possible, first make vector and matrix structs. (But Astrant already has those)
+// TODO: matrix attributes are not handled well (they take up 4 indices in the attributes instead of one)
+// TODO: make the attribute-list nicer (it is really cumbersome now, with the vector)
 // NOTE: there is only 1 set_uniform for std::array...
 
 namespace J {
 
 class shader {
-    // NOTE: it could be hardcoded to use vertex_shader and fragment_shader, for ShaderMap.
+    // NOTE: it could be hardcoded to use vertex_shader and fragment_shader, for ShaderMap. There is no geometry_shader in ES2.
     typedef std::map<GLenum, GLuint> ShaderMap;             // shader_type -> shader_name
     typedef std::map<std::string, GLuint> AttributeMap;     // attribute_name -> attribute_index
     
@@ -77,7 +85,7 @@ public:
 			GLuint shader = it.second;
 			glDetachShader(program, shader);
 			glDeleteShader(shader);
-            // NOTE: If a shader object to be deleted is attached to a program object, it will be flagged for deletion, but it will not be deleted until it is no longer attached to any program object
+            // NOTE: If a shader object to be deleted is attached to a program object, it will be flagged for deletion, but it will not be deleted until it is no longer attached to any program object. Also deleting a shader with name '0' is safe.
 		}
         
 		end();
@@ -96,6 +104,7 @@ public:
     
     // *****************
     // attribute setters
+	// NOTE: the normalized parameter is for integer types, if true they will be mapped to [0, 1], if false it stays in [0, 256] or so.
     void set_attribute(const std::string& name, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* ptr){
         const GLuint index = attributes[name];
         glVertexAttribPointer(index, size, type, normalized, stride, ptr);
@@ -173,7 +182,8 @@ public:
 		glUniform1iv(glGetUniformLocation(program, name), 1, value);
 	}
 
-    // matrices (in ES2 only square matrices)
+    // matrices
+	// NOTE: in ES2 there are only square matrices
 	void set_uniform(char const* name, const GLfloat (&value)[16], GLboolean trans) const {
 		glUniformMatrix4fv(glGetUniformLocation(program, name), 1, trans, value);
 	}
@@ -190,7 +200,8 @@ public:
 		glUniformMatrix2fv(glGetUniformLocation(program, name), 1, trans, value);
 	}
 
-    // textures (see todo above)
+    // textures
+	// NOTE: with a texture class this can be made prettier (also se the TODO in fbo.h)
 	void set_texture(const char* name, GLenum target, GLuint tex, int textureLocation, GLenum filter = GL_LINEAR) const {
 		glActiveTexture(GL_TEXTURE0 + textureLocation);
 		glBindTexture(target, tex);
@@ -219,7 +230,7 @@ private:
     // *******************
     // compiling / linking
 	void compile_shader(std::istream& file, GLenum type) {
-		// get the c-string, the shortest way (not fastest)
+		// get the c-string, the shortest way (not fastest), from http://tinodidriksen.com/
 		std::string buffer((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
 		const char* sptr = buffer.c_str();
 		int ssize = buffer.size();

J/to_string.h

@@ -6,13 +6,16 @@
 //  Copyright 2011 Vadovas. All rights reserved.
 //
 
+/*
+ Workaround for the std::to_string in C++11. Might not be the fastest way (performance-wise), but it was the fastest to implement ;).
+ */
+
 #ifndef OpenGLTemplate_to_string_h
 #define OpenGLTemplate_to_string_h
 
 #include <iostream>
 #include <sstream>
 
-// NOTE: workaround for the std::to_string in C++11
 namespace std {
 
 template <typename T>