fix #4 Sphere can be rendered with normals now. Calculation fo normals is however not working

Nebulix/Rendering/Mesh.cs

@@ -5,7 +5,8 @@ namespace Nebulix.Rendering
 {
 	public sealed class Mesh
 	{
-		public Vector3D<float>[] Vertices { get => vertices; set { vertices = value; regenerate = true; } }
+		public Vector3D<float>[] Vertices { get => vertices; 
+			set { vertices = value; regenerate = true; normals = new Vector3D<float>[vertices.Length];} }
 		public uint[] Indices { get => indices; set { indices = value; regenerate = true; } }
 		
 		private uint vao = 0, vbo = 0, ebo = 0;
@@ -23,11 +24,11 @@ namespace Nebulix.Rendering
 
 		public void CalculateNormals()
 		{
-			normals = new Vector3D<float>[vertices.Length];
-			for (int j = 0; j < vertices.Length; j++)
-			{
-				normals[j] = Vector3D<float>.Zero;
-			}
+			// normals = new Vector3D<float>[vertices.Length];
+			// for (int j = 0; j < vertices.Length; j++)
+			// {
+			// 	normals[j] = Vector3D<float>.Zero;
+			// }
 
 			return;
 			for (int i = 0; i < indices.Length; i += 3)
@@ -72,12 +73,23 @@ namespace Nebulix.Rendering
 				ebo = gl.GenBuffer();
 
 			float[] meshData = new float[vertices.Length * 3 + normals.Length * 3];
-			vertices.ExtractComponents().CopyTo(meshData, 0);
-			//meshData.AddRange(normals.ExtractComponents());
+			for (int i = 0, insert = 0; i < vertices.Length; i++)
+			{
+				meshData[insert] = vertices[i].X;
+				meshData[insert + 1] = vertices[i].Y;
+				meshData[insert + 2] = vertices[i].Z;
+				
+				meshData[insert + 3] = normals[i].X;
+				meshData[insert + 4] = normals[i].Y;
+				meshData[insert + 5] = normals[i].Z;
+				insert += 6;
+			}
+			// extractedVertices.CopyTo(meshData, 0);
+			// extractedNormals.CopyTo(meshData, extractedVertices.Length);
 			gl.BindBuffer(BufferTargetARB.ArrayBuffer, vbo);
 			fixed(void* data = &meshData[0])
 			{
-				gl.BufferData(BufferTargetARB.ArrayBuffer, (nuint)(meshData.Length * 3 * sizeof(float)), data, BufferUsageARB.StaticDraw);
+				gl.BufferData(BufferTargetARB.ArrayBuffer, (nuint)(meshData.Length * sizeof(float)), data, BufferUsageARB.StaticDraw);
 			}
 
 			gl.BindBuffer(BufferTargetARB.ElementArrayBuffer, ebo);
@@ -88,10 +100,10 @@ namespace Nebulix.Rendering
 			
 			// vertices
 			gl.EnableVertexAttribArray(0);
-			gl.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 3 * sizeof(float), null);
+			gl.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 6 * sizeof(float), null);
 			// normals
-			//gl.EnableVertexAttribArray(1);
-			//gl.VertexAttribPointer(1, 3, VertexAttribPointerType.Float, false, 6 * sizeof(float), (void*)(3 * sizeof(float)));
+			gl.EnableVertexAttribArray(1);
+			gl.VertexAttribPointer(1, 3, VertexAttribPointerType.Float, false, 6 * sizeof(float), (void*)(3 * sizeof(float)));
 		}
 	}
 }

Nebulix/Rendering/Shaders/Shader.cs

@@ -35,6 +35,11 @@ public class Shader
         _glContext.Uniform1(_glContext.GetUniformLocation(_shaderProgramId, name), value);
     }
 
+    public void SetVector(string name, Vector3D<float> value)
+    {
+	    _glContext.Uniform3(_glContext.GetUniformLocation(_shaderProgramId, name), value.X, value.Y, value.Z);
+    }
+    
     public unsafe void SetMatrix(string name, Matrix4x4 matrix)
     {
         _glContext.UniformMatrix4(_glContext.GetUniformLocation(_shaderProgramId, name), 1, false, (float*) &matrix);

src/Camera/Camera.cs

@@ -14,6 +14,7 @@ public enum MovementDirection
 
 public class Camera
 {
+	public Vector3D<float> Position => _position;
 	private readonly Vector3D<float> _worldUp;
 	private Vector3D<float> _position;
 	private Vector3D<float> _front;

src/Engine_silk.NET.csproj

@@ -29,7 +29,7 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
     <None Update="Shaders\Sphere\sphere.frag">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
     <None Update="Shaders\Sphere\sphere.vert">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>

src/Program.cs

@@ -171,7 +171,7 @@ public static class Program
 		}
 	}
 
-	private static unsafe void OnRender(double deltaTime)
+	private static void OnRender(double deltaTime)
 	{
 		_gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
 
@@ -199,6 +199,13 @@ public static class Program
 		_sphereShader.SetMatrix("projectionMatrix", projectionMatrix);
 		_sphereShader.SetMatrix("viewMatrix", viewMatrix);
 		
+		_sphereShader.SetVector("viewPosition", _cam.Position);
+		
+		_sphereShader.SetVector("dirLight.direction", new Vector3D<float>(-0.2f, -1.0f, -0.3f));
+		_sphereShader.SetVector("dirLight.ambient", new Vector3D<float>(0.1f));
+		_sphereShader.SetVector("dirLight.diffuse", new Vector3D<float>(1f));
+		_sphereShader.SetVector("dirLight.specular", new Vector3D<float>(0.5f));
+
 		sphere.RenderSphere(_gl);
 	}
 

src/Shaders/Sphere/sphere.frag

@@ -3,10 +3,41 @@
 out vec4 FragColour;
 
 in vec3 FragPos;
-//in vec3 Normal;
+in vec3 Normal;
+
+struct DirectionalLight {
+    vec3 direction;
+
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+
+uniform vec3 viewPosition;
+uniform DirectionalLight dirLight;
+
+vec3 CalculateDirectionalLight(DirectionalLight light, vec3 normal, vec3 viewDir)
+{
+    vec3 lightDir = normalize(-light.direction);
+
+    float diff = max(dot(normal, lightDir), 0.0);
+
+    vec3 reflectionDir = reflect(-lightDir, normal);
+    float spec = pow(max(dot(viewDir, reflectionDir), 0.0), 32);
+
+    vec3 ambient = light.ambient;// * vec3(texture(material.diffuseMap, TexCoords));
+    vec3 diffuse = light.diffuse * diff;// * vec3(texture(material.diffuseMap, TexCoords));
+    vec3 specular = light.specular * spec;// * vec3(texture(material.specularMap, TexCoords));
+
+    return ambient + diffuse + specular;
+}
 
 void main()
 {
-    vec3 col = vec3(1.0, 0.5, 0.2) * FragPos;
+    vec3 normal = normalize(Normal);
+    vec3 viewDir = normalize(viewPosition - FragPos);
+
+//    vec3 col = vec3(1.0, 0.5, 0.2) * FragPos;
+    vec3 col = CalculateDirectionalLight(dirLight, normal, viewDir);
     FragColour = vec4(col, 1);
 }

src/Shaders/Sphere/sphere.vert

@@ -1,7 +1,7 @@
 #version 330 core
 
 layout (location = 0) in vec3 aPosition;
-//layout (location = 1) in vec3 normalVector;
+layout (location = 1) in vec3 normalVector;
 
 
 uniform mat4 modelMatrix;
@@ -9,13 +9,14 @@ uniform mat4 viewMatrix;
 uniform mat4 projectionMatrix;
 
 out vec3 FragPos;
-//out vec3 Normal;
+out vec3 Normal;
 
 void main()
 {
     vec4 pos = vec4(aPosition, 1.0);
     // TODO: calculate the inverse of the model matrix beforehand since "inverse()" is very costly to calculate for every vertex
-//    Normal = mat3(transpose(inverse(modelMatrix))) * normalVector;
+    Normal = mat3(transpose(inverse(modelMatrix))) * normalVector;
+//    Normal = vec3(0);
     FragPos = vec3(modelMatrix * pos);
     gl_Position = projectionMatrix * viewMatrix * modelMatrix * pos;
 }