OpenGL Lighting Issue

[aadityap0901]

From what I understood, we need to assign normal vectors for each 4 vertices of the face (I am using GL_QUADS btw) and not just the face.
This is what I did:
GL Code:

Code: (Select All)

    _glEnable _GL_LIGHTING

    _glEnable _GL_LIGHT0



    _glLightfv _GL_LIGHT0, _GL_AMBIENT, glVec4(SkyColorRed, SkyColorGreen, SkyColorBlue, 0)

    _glLightfv _GL_LIGHT0, _GL_DIFFUSE, glVec4(SkyColorRed, SkyColorGreen, SkyColorBlue, 0)

    _glLightfv _GL_LIGHT0, _GL_SPECULAR, glVec4(SkyColorRed, SkyColorGreen, SkyColorBlue, 0)

    _glLightfv _GL_LIGHT0, _GL_POSITION, glVec4(Player_Position.X, Player_Position.Y, Player_Position.Z, 0)

    _glLightfv _GL_LIGHT0, _GL_SPOT_DIRECTION, glVec4(0, 1, 0, 0)

    _glLightfv _GL_LIGHT0, _GL_SPOT_EXPONENT, glVec4(1, 0, 0, 0)



    _glEnable _GL_COLOR_MATERIAL

    _glColorMaterial _GL_FRONT, _GL_DIFFUSE



    _glEnable _GL_TEXTURE_2D



    _glBindTexture _GL_TEXTURE_2D, TextureHandle



    _glEnableClientState _GL_VERTEX_ARRAY

    _glEnableClientState _GL_TEXTURE_COORD_ARRAY

    _glEnableClientState _GL_NORMAL_ARRAY



    For I = LBound(Chunks) - 1 To UBound(Chunks) - 1

        If Chunks(I + 1).ShowCount = 0 Or Chunks(I + 1).isRenderDataLoaded = 0 Then _Continue

        _glVertexPointer 3, _GL_SHORT, 0, _Offset(Vertices(I * ChunkSectionVerticesSize + 1))

        _glTexCoordPointer 2, _GL_FLOAT, 0, _Offset(TexCoords(I * ChunkSectionVerticesSize + 1))

        _glNormalPointer _GL_FLOAT, 0, _Offset(Normals(I * ChunkSectionNormalsSize + 1))

        _glDrawArrays _GL_QUADS, 0, Chunks(I + 1).ShowCount

    Next I



    _glDisableClientState _GL_VERTEX_ARRAY

    _glDisableClientState _GL_TEXTURE_COORD_ARRAY

    _glDisableClientState _GL_NORMAL_ARRAY



    _glDisable _GL_TEXTURE_2D

    _glDisable _GL_COLOR_MATERIAL

    _glDisable _GL_LIGHT0

    _glDisable _GL_LIGHTING

Code for assigning Vertices, Texture Coords, Normals
Take LV as the new index
Vertices are Vector3, TexCoords are Vector2, Normals are Vector3
(Take Visibility (Unsigned Byte) = -1
AssetsModelVertices(1 to 24), AssetsModelTexCoords(1 to 24) are the hardcoded vertices and texture coords for a cube
BlockFaces Array includes which Texture is used at each face
I am using Texture Atlas)

Code: (Select All)

For I = 0 To 23

    Face = _SHL(1, _SHR(I, 2))

    If (Face And Visibility) = 0 Then _Continue

    LV = LV + 1

    Vertices(LV).X = AssetsModelVertices(I + 1).X + CX16 + X

    Vertices(LV).Y = AssetsModelVertices(I + 1).Y + Y

    Vertices(LV).Z = AssetsModelVertices(I + 1).Z + CZ16 + Z

    TexCoords(LV).X = AssetsModelTexCoords(I + 1).X

    TexCoords(LV).Y = (AssetsModelTexCoords(I + 1).Y + BlockFaces(Block, _SHR(I, 2) + 1) - 1) / TotalImages

    Chunks(FoundI).Count = Chunks(FoundI).Count + 1

    Select Case _SHR(I, 2)

        Case 1: Normals(LV).X = 1: Normals(LV).Y = 0: Normals(LV).Z = 0

        Case 2: Normals(LV).X = -1: Normals(LV).Y = 0: Normals(LV).Z = 0

        Case 3: Normals(LV).X = 0: Normals(LV).Y = 1: Normals(LV).Z = 0

        Case 4: Normals(LV).X = 0: Normals(LV).Y = -1: Normals(LV).Z = 0

        Case 5: Normals(LV).X = 0: Normals(LV).Y = 0: Normals(LV).Z = 1

        Case 6: Normals(LV).X = 0: Normals(LV).Y = 0: Normals(LV).Z = -1

    End Select

Next I

It gave me this result:

Some blocks have a different light effect.