updated makefile for supporting different target architectures

use "ARCH=arch_name make"

restructured project folder, implementations and headers together under sources/

sources/GL_STUFF/EFFECTS/SCREEN/fragmentShader_2.glsl

@@ -0,0 +1,18 @@
+#version 300 es
+
+/*this will affect all the float guys (float, vecN, matN )*/
+precision mediump float;
+
+in vec3 fragPos;
+in vec2 frag_uv;  //coordinate 2d di texure
+
+uniform sampler2D inTex;   //campionatore 2d 
+
+out vec4 FragColor;  
+
+
+void main()
+{   
+    //FragColor = vec4(1.0f, 1.0f, 0, 1);
+    FragColor = texture(inTex, frag_uv);
+}

sources/GL_STUFF/EFFECTS/SCREEN/vertexShader_2.glsl

@@ -0,0 +1,21 @@
+#version 300 es
+
+/*this will affect all the float guys (float, vecN, matN )*/
+precision mediump float;
+
+
+layout (location = 0) in vec3 vertPos;   // Attributo Posizione
+
+
+ out vec3 fragPos;
+ out vec2 frag_uv;
+
+
+void main()
+{   
+	float adjustedU = (vertPos.x + 1) / 2;
+	float adjustedV = (vertPos.y + 1) / 2;
+	frag_uv = vec2(adjustedU, adjustedV);
+    fragPos = vertPos;
+	gl_Position = vec4(fragPos, 1);
+}