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

resources/vertexShader_gourard.glsl

@@ -0,0 +1,41 @@
+#version 300 es
+
+/*this will affect all the float guys (float, vecN, matN )*/
+precision mediump float;
+
+layout (location = 0) in vec3 vertPos;   // Attributo Posizione
+layout (location = 1) in vec2 coord_uv; // Attributo texture
+layout (location = 2) in vec3 vertNor;
+layout (location = 3) in vec3 vertTan;
+layout (location = 4) in vec3 vertBitan;
+
+ uniform mat4 Model;
+ uniform mat4 ModelRot;
+ uniform mat4 Projection;
+ uniform mat4 View;
+
+ out vec3 fragPos;
+ out vec2 frag_uv;
+ out vec3 fragNormal;
+ out vec3 fragBaryc;
+
+ out vec3 T;
+ out vec3 B;
+ out vec3 N;
+
+
+void main()
+{   
+	frag_uv = coord_uv;
+	vec3 normal = normalize(vertNor);
+	
+    mat3 mv = mat3(View * Model);
+    T = normalize(mv * vertTan);
+    B = normalize(mv * vertBitan);
+    N = normalize(mv * vertNor);
+
+    fragNormal = mat3(ModelRot) * vec3(normal);
+    fragPos=(Model*vec4(vertPos,1)).xyz;
+    gl_Position=Projection*View*Model*vec4(vertPos,1);
+    fragBaryc = vec3(gl_VertexID % 3 == 0, gl_VertexID % 3 == 1, gl_VertexID % 3 == 2);
+}