passing poylNormal, tangent, bitangent to shader

QtMeshViewer/Resources/fshader.glsl

@@ -22,6 +22,10 @@ uniform struct Light {
 	float ambientCoefficient;
 } light;
 
+attribute vec3 a_polyNorm;
+attribute vec3 a_polyTan;
+attribute vec3 a_polyBiTan;
+
 varying vec2 v_surfaceUV;
 varying vec3 v_surfacePosition;
 varying vec3 v_surfaceNormal;