Добавление MeshLoader, он умеет загружать геометрию и нормали из .obj файлов

lab2/res/cube.mtl

@@ -0,0 +1,12 @@
+# Blender MTL File: 'cube.blend'
+# Material Count: 1
+
+newmtl Material
+Ns 250.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2

lab2/res/cube.obj

@@ -0,0 +1,32 @@
+# Blender v3.4.1 OBJ File: 'cube.blend'
+# www.blender.org
+mtllib cube.mtl
+o Cube
+v 1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 1.000000
+v -1.000000 1.000000 -1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 1.000000
+vn 0.0000 1.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn -1.0000 0.0000 0.0000
+vn 0.0000 -1.0000 0.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 -1.0000
+usemtl Material
+s off
+f 5//1 3//1 1//1
+f 3//2 8//2 4//2
+f 7//3 6//3 8//3
+f 2//4 8//4 6//4
+f 1//5 4//5 2//5
+f 5//6 2//6 6//6
+f 5//1 7//1 3//1
+f 3//2 7//2 8//2
+f 7//3 5//3 6//3
+f 2//4 4//4 8//4
+f 1//5 3//5 4//5
+f 5//6 1//6 2//6

lab2/res/main.vsh

@@ -1,7 +1,7 @@
 #version 330 core
 
 layout (location = 0) in vec3 v_position;
-layout (location = 1) in float light;
+layout (location = 1) in vec3 v_normal;
 
 out vec4 a_color;
 uniform mat4 projview;
@@ -9,6 +9,6 @@ uniform mat4 projview;
 void main(){
 //	gl_Position = vec4(v_position, 1) * projview;
 	gl_Position = projview * vec4(v_position, 1);
-	a_color = vec4(0.5, 0, 1, 1) * light;
+	a_color = vec4(0.5, 0, 1, 1);
 }