ported the University CGI demo from WINDOWS + GLUT + GLEW + GLU + OpenGL 4 to LINUX WAYLAND + EGL + GLES 2 with minimal cuts

GL_STUFF/SOURCES/EFFECTS/TEX_MERGER/vertexShader_merger.glsl

@@ -0,0 +1,20 @@
+#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);
+}