refactor: not overlaping keyboard and midi

README.md

@@ -282,16 +282,28 @@ We will not dig down all the variables here but feel free to read either:
 * [sample/forge_project.cfg](./sample/forge_project.cfg) (beginner oriented)
 * [default/forge_project.cfg](./default/forge_project.cfg) (more complete)
 
-#### Midi groups
+#### Input codes
 
-FORGE allows you to send the midi data in the form of groups.
+Each input code can be either a midi event or a key code.
+
+* 1 - 999 -> midi event
+* 1001 - 1999 -> key code
+* Keyboard modifiers are encoded like this:
+  * 10000 -> shift
+  * 100000 -> control
+  * 1000000 -> alt
+  * (This means 111082 is control+alt+R)
+
+#### Input groups
+
+FORGE allows you to send the midi/keyboard data in the form of groups.
 
 Each group has the following properties:
 
-* A number of layers with `MIDI_X_ACTIVE_COUNT` (default: `1`)
-* Each midi code controlling how to change the active layer with `MIDI_X_ACTIVE_Y`
-* A number of codes with `MIDI_X_COUNT`
-* Each midi code controlling the active layer with `MIDI_X_Y` (as a `vec3`: `_X` / `_Y` / `_Z`)
+* A number of layers with `GROUP_X_ACTIVE_COUNT` (default: `1`)
+* Each midi/keyboard code controlling how to change the active layer with `GROUP_X_ACTIVE_Y`
+* A number of codes with `GROUP_X_COUNT`
+* Each midi/keyboard code controlling the active layer with `GROUP_X_Y` (as a `vec3`: `_X` / `_Y` / `_Z`)
 
 #### States
 
@@ -299,9 +311,9 @@ FORGE allows to define a "state" to a fragment shader.
 
 This combines several parameters:
 
-* `SELECT_PAGE_COUNT` (default: `1`) + `SELECT_PAGE_X`: define midi codes for pages of item.
-* `SELECT_ITEM_COUNT` + `SELECT_ITEM_X`: define midi codes for items per page.
-* `SELECT_FRAG_X`: define midi codes to "select" a fragment shader.
+* `SELECT_PAGE_COUNT` (default: `1`) + `SELECT_PAGE_X`: define midi/keyboard codes for pages of item.
+* `SELECT_ITEM_COUNT` + `SELECT_ITEM_X`: define midi/keyboard codes for items per page.
+* `SELECT_FRAG_X`: define midi/keyboard codes to "select" a fragment shader.
 
 The selected fragment shader will have its state updated with either:
 
@@ -342,8 +354,8 @@ uniform float iTime; // the current time
 uniform sampler2D iTex0; // texture 1 (0-based)
 uniform sampler2D iTex9; // texture 10
 uniform int iSeed1;
-uniform vec3 iMidi2_3[7]; // midi group 2, layer 3, size 7
-uniform vec3 iMidi3_1[2];
+uniform vec3 iGroup2_3[7]; // midi group 2, layer 3, size 7
+uniform vec3 iGroup3_1[2];
 ```
 
 #### Working with `#include`