Huge demos update

-moved C stdlib function definitions to ecs_utils.utils
-added function to calculate mix(linear interpolation) and rsqrt(fast inverse sqrt)
-added some math to vec2 (length, normalize...)
-improved renderer with possibility to use multiple materials (one per block, not perfect solution for parallel compute, but works with some requirements)
-added blending support for material (opaque, additive, mixed)
-added Android support
-added gprahical representation for mouse tools (tool_circle.d)
-added initial support for editing template components variables
-better Component and Templates listing
-added possibility to add/removes components using mouse
-move CLocation to game_core.basic and reuse in every test
-moved tools code from demos to App (now code is fully separated from demos!)
-some improvement and fixes in Snake demo, with additional systems to handle adding and removing entities
-added new demo: Particles. By now demo has several particles to spawn and support for attractors and vortexes (calculation is made as every attractor with every entity)
-fixed bug with window hover and tools
-improved tool behaviour
-added new material
-now window is always opened as maximized windowed mode
-some minor fixes and improvements

demos/source/gui/component.d

@@ -1,6 +1,61 @@
-module gui.components;
+module gui.component;
+
+import ecs_utils.utils;
 
 struct ComponentGUI
 {
-    
-}
+    const (char)* name;
+    void* data;
+    ushort component_id;
+}
+
+struct ComponentEditGUI
+{
+    const (char)* name;
+    VariableGUI[] variables;
+    uint used;
+}
+
+struct VariableGUI
+{
+    struct Int 
+    {
+        int min;
+        int max;
+    }
+
+    struct Float
+    {
+        float min;
+        float max;
+    }
+
+    struct Enum
+    {
+        const (char)[][] strings;
+    }
+
+    enum Type
+    {
+        byte_,
+        ubyte_,
+        short_,
+        ushort_,
+        int_,
+        uint_,
+        float_,
+        enum_,
+        color,
+        vec2,
+        ivec2
+    }
+    Type type;
+    const (char)* name;
+    ushort offset;
+    union 
+    {
+        Int int_;
+        Float float_;
+        Enum enum_;
+    }
+}