Code and content re-work: advanced OpenGL and advanced lighting.

src/5.advanced_lighting/3.2.2.point_shadows_soft/3.2.2.point_shadows.fs

@@ -20,11 +20,11 @@ uniform bool shadows;
 // array of offset direction for sampling
 vec3 gridSamplingDisk[20] = vec3[]
 (
-   vec3(1, 1, 1), vec3(1, -1, 1), vec3(-1, -1, 1), vec3(-1, 1, 1), 
-   vec3(1, 1, -1), vec3(1, -1, -1), vec3(-1, -1, -1), vec3(-1, 1, -1),
-   vec3(1, 1, 0), vec3(1, -1, 0), vec3(-1, -1, 0), vec3(-1, 1, 0),
-   vec3(1, 0, 1), vec3(-1, 0, 1), vec3(1, 0, -1), vec3(-1, 0, -1),
-   vec3(0, 1, 1), vec3(0, -1, 1), vec3(0, -1, -1), vec3(0, 1, -1)
+   vec3(1, 1,  1), vec3( 1, -1,  1), vec3(-1, -1,  1), vec3(-1, 1,  1), 
+   vec3(1, 1, -1), vec3( 1, -1, -1), vec3(-1, -1, -1), vec3(-1, 1, -1),
+   vec3(1, 1,  0), vec3( 1, -1,  0), vec3(-1, -1,  0), vec3(-1, 1,  0),
+   vec3(1, 0,  1), vec3(-1,  0,  1), vec3( 1,  0, -1), vec3(-1, 0, -1),
+   vec3(0, 1,  1), vec3( 0, -1,  1), vec3( 0, -1, -1), vec3( 0, 1, -1)
 );
 
 float ShadowCalculation(vec3 fragPos)
@@ -101,5 +101,5 @@ void main()
     float shadow = shadows ? ShadowCalculation(fs_in.FragPos) : 0.0;                      
     vec3 lighting = (ambient + (1.0 - shadow) * (diffuse + specular)) * color;    
     
-    FragColor = vec4(lighting, 1.0f);
+    FragColor = vec4(lighting, 1.0);
 }

src/5.advanced_lighting/3.2.2.point_shadows_soft/3.2.2.point_shadows.vs

@@ -25,5 +25,5 @@ void main()
     else
         vs_out.Normal = transpose(inverse(mat3(model))) * aNormal;
     vs_out.TexCoords = aTexCoords;
-    gl_Position = projection * view * model * vec4(aPos, 1.0f);
+    gl_Position = projection * view * model * vec4(aPos, 1.0);
 }

src/5.advanced_lighting/3.2.2.point_shadows_soft/3.2.2.point_shadows_depth.fs

@@ -0,0 +1,16 @@
+#version 330 core
+in vec4 FragPos;
+
+uniform vec3 lightPos;
+uniform float far_plane;
+
+void main()
+{
+    float lightDistance = length(FragPos.xyz - lightPos);
+    
+    // map to [0;1] range by dividing by far_plane
+    lightDistance = lightDistance / far_plane;
+    
+    // write this as modified depth
+    gl_FragDepth = lightDistance;
+}

src/5.advanced_lighting/3.2.2.point_shadows_soft/3.2.2.point_shadows_depth.gs

@@ -0,0 +1,22 @@
+#version 330 core
+layout (triangles) in;
+layout (triangle_strip, max_vertices=18) out;
+
+uniform mat4 shadowMatrices[6];
+
+out vec4 FragPos; // FragPos from GS (output per emitvertex)
+
+void main()
+{
+    for(int face = 0; face < 6; ++face)
+    {
+        gl_Layer = face; // built-in variable that specifies to which face we render.
+        for(int i = 0; i < 3; ++i) // for each triangle's vertices
+        {
+            FragPos = gl_in[i].gl_Position;
+            gl_Position = shadowMatrices[face] * FragPos;
+            EmitVertex();
+        }    
+        EndPrimitive();
+    }
+} 

src/5.advanced_lighting/3.2.2.point_shadows_soft/3.2.2.point_shadows_depth.vs

@@ -0,0 +1,9 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+
+uniform mat4 model;
+
+void main()
+{
+    gl_Position = model * vec4(aPos, 1.0);
+}