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Merge pull request #4 from frederikja163/tutorials-cs-1.4
Tutorials cs 1.4
2 parents 54ca717 + 760cea1 commit c1bcd03

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‎Silk.NET.sln

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@@ -241,7 +241,11 @@ Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "Tutorial 1.1 - Hello window
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EndProject
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Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "Tutorial 1.2 - Hello quad", "examples\FSharp\OpenGL\Tutorial 1.2 - Hello quad\Tutorial 1.2 - Hello quad.fsproj", "{7BAB0B50-AF2B-4F65-AC6E-C5F952C81665}"
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EndProject
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<<<<<<< HEAD
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Tutorial 1.4 - Textures", "examples\CSharp\OpenGL\Tutorial 1.4 - Textures\Tutorial 1.4 - Textures.csproj", "{B4E96437-3464-4BF9-976C-ADA09916CE0D}"
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=======
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Tutorial 1.5 - Transformations", "examples\CSharp\OpenGL\Tutorial 1.5 - Transformations\Tutorial 1.5 - Transformations.csproj", "{1DF2F3F5-0763-408D-A26F-50AB9447D978}"
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>>>>>>> tutorials-cs-1.5
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -1417,6 +1421,7 @@ Global
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{7BAB0B50-AF2B-4F65-AC6E-C5F952C81665}.Release|x64.Build.0 = Release|Any CPU
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{7BAB0B50-AF2B-4F65-AC6E-C5F952C81665}.Release|x86.ActiveCfg = Release|Any CPU
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{7BAB0B50-AF2B-4F65-AC6E-C5F952C81665}.Release|x86.Build.0 = Release|Any CPU
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<<<<<<< HEAD
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{B4E96437-3464-4BF9-976C-ADA09916CE0D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{B4E96437-3464-4BF9-976C-ADA09916CE0D}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{B4E96437-3464-4BF9-976C-ADA09916CE0D}.Debug|x64.ActiveCfg = Debug|Any CPU
@@ -1429,6 +1434,20 @@ Global
14291434
{B4E96437-3464-4BF9-976C-ADA09916CE0D}.Release|x64.Build.0 = Release|Any CPU
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{B4E96437-3464-4BF9-976C-ADA09916CE0D}.Release|x86.ActiveCfg = Release|Any CPU
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{B4E96437-3464-4BF9-976C-ADA09916CE0D}.Release|x86.Build.0 = Release|Any CPU
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=======
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Debug|x64.ActiveCfg = Debug|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Debug|x64.Build.0 = Debug|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Debug|x86.ActiveCfg = Debug|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Debug|x86.Build.0 = Debug|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Release|Any CPU.Build.0 = Release|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Release|x64.ActiveCfg = Release|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Release|x64.Build.0 = Release|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Release|x86.ActiveCfg = Release|Any CPU
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{1DF2F3F5-0763-408D-A26F-50AB9447D978}.Release|x86.Build.0 = Release|Any CPU
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>>>>>>> tutorials-cs-1.5
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
@@ -1537,7 +1556,11 @@ Global
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{65787DEC-4B92-4562-AB99-E0F75586BF56} = {3427E7AB-4ADC-4DEE-A1D5-71CE7DA0CAC1}
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{08A71FB9-D40B-44C5-8D62-212530566280} = {4FF95A03-14E7-4982-9BAF-A007ED1EDF46}
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{7BAB0B50-AF2B-4F65-AC6E-C5F952C81665} = {4FF95A03-14E7-4982-9BAF-A007ED1EDF46}
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<<<<<<< HEAD
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{B4E96437-3464-4BF9-976C-ADA09916CE0D} = {3427E7AB-4ADC-4DEE-A1D5-71CE7DA0CAC1}
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=======
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{1DF2F3F5-0763-408D-A26F-50AB9447D978} = {3427E7AB-4ADC-4DEE-A1D5-71CE7DA0CAC1}
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>>>>>>> tutorials-cs-1.5
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {A8E73A98-30BA-4585-AF7E-F3315A359235}

‎examples/CSharp/OpenGL/Tutorial 1.5 - Transformations/BufferObject.cs

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using Silk.NET.OpenGL;
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using System;
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namespace Tutorial
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{
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public class BufferObject<TDataType> : IDisposable
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where TDataType : unmanaged
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{
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private uint _handle;
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private GLEnum _bufferType;
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private GL _gl;
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public unsafe BufferObject(GL gl, TDataType[] data, GLEnum bufferType)
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{
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_gl = gl;
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_bufferType = bufferType;
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_handle = _gl.GenBuffer();
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Bind();
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fixed (void* d = data)
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{
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_gl.BufferData(bufferType, (UIntPtr)(data.Length * sizeof(TDataType)), d, GLEnum.StaticDraw);
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}
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}
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public void Bind()
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{
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_gl.BindBuffer(_bufferType, _handle);
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}
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public void Dispose()
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{
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_gl.DeleteBuffer(_handle);
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}
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}
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}

‎examples/CSharp/OpenGL/Tutorial 1.5 - Transformations/Program.cs

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using Silk.NET.Input;
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using Silk.NET.Input.Common;
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using Silk.NET.OpenGL;
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using Silk.NET.Windowing;
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using Silk.NET.Windowing.Common;
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using System;
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using System.Drawing;
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using System.Numerics;
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namespace Tutorial
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{
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class Program
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{
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private static IWindow window;
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private static GL Gl;
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private static BufferObject<float> Vbo;
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private static BufferObject<uint> Ebo;
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private static VertexArrayObject<float, uint> Vao;
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private static Texture Texture;
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private static Shader Shader;
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//Creating matrix transformations
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private static Matrix4x4[] Matrices = new Matrix4x4[4];
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private static readonly float[] Vertices =
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{
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//X Y Z U V
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0.5f, 0.5f, 0.0f, 1f, 1f,
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0.5f, -0.5f, 0.0f, 1f, 0f,
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-0.5f, -0.5f, 0.0f, 0f, 0f,
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-0.5f, 0.5f, 0.5f, 0f, 1f
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};
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private static readonly uint[] Indices =
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{
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0, 1, 3,
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1, 2, 3
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};
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private static void Main(string[] args)
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{
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var options = WindowOptions.Default;
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options.Size = new Size(800, 600);
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options.Title = "LearnOpenGL with Silk.NET";
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window = Window.Create(options);
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window.Load += OnLoad;
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window.Render += OnRender;
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window.Closing += OnClose;
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window.Run();
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}
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private unsafe static void OnLoad()
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{
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IInputContext input = window.GetInput();
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for (int i = 0; i < input.Keyboards.Count; i++)
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{
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input.Keyboards[i].KeyDown += KeyDown;
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}
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Gl = GL.GetApi();
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Ebo = new BufferObject<uint>(Gl, Indices, GLEnum.ElementArrayBuffer);
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Vbo = new BufferObject<float>(Gl, Vertices, GLEnum.ArrayBuffer);
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Vao = new VertexArrayObject<float, uint>(Gl, Vbo, Ebo);
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Vao.VertexAttributePointer(0, 3, GLEnum.Float, 5, 0);
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Vao.VertexAttributePointer(1, 2, GLEnum.Float, 5, 3);
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Shader = new Shader(Gl, "shader.vert", "shader.frag");
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Texture = new Texture(Gl, "silk.png");
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//Translation.
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Matrices[0] = Matrix4x4.Identity * Matrix4x4.CreateTranslation(0.5f, 0.5f, 0f);
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//Rotation.
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Matrices[1] = Matrix4x4.Identity * Matrix4x4.CreateRotationZ(1);
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//Scaling.
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Matrices[2] = Matrix4x4.Identity * Matrix4x4.CreateScale(0.5f);
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//Mixed transformation.
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Matrices[3] = Matrix4x4.Identity * Matrix4x4.CreateScale(0.5f) * Matrix4x4.CreateRotationZ(2) * Matrix4x4.CreateTranslation(-0.5f, 0.5f, 0f);
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}
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private static void OnRender(double obj)
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{
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Gl.Clear((uint)ClearBufferMask.ColorBufferBit);
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Vao.Bind();
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Texture.Bind();
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Shader.Use();
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Shader.SetUniform("uTexture0", 0);
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for (int i = 0; i < Matrices.Length; i++)
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{
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//Using the transformations.
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Shader.SetUniform("uModel", Matrices[i]);
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Gl.DrawElements(GLEnum.Triangles, (uint)Indices.Length, GLEnum.UnsignedInt, 0);
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}
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}
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private static void OnClose()
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{
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Vbo.Dispose();
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Ebo.Dispose();
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Vao.Dispose();
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Shader.Dispose();
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Texture.Dispose();
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}
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private static void KeyDown(IKeyboard arg1, Key arg2, int arg3)
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{
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if (arg2 == Key.Escape)
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{
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window.Close();
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}
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}
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}
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}

‎examples/CSharp/OpenGL/Tutorial 1.5 - Transformations/Shader.cs

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using System;
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using System.IO;
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using System.Numerics;
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using Silk.NET.OpenGL;
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namespace Tutorial
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{
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public class Shader : IDisposable
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{
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private uint _handle;
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private GL _gl;
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public Shader(GL gl, string vertexPath, string fragmentPath)
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{
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_gl = gl;
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uint vertex = LoadShader(ShaderType.VertexShader, vertexPath);
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uint fragment = LoadShader(ShaderType.FragmentShader, fragmentPath);
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_handle = _gl.CreateProgram();
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_gl.AttachShader(_handle, vertex);
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_gl.AttachShader(_handle, fragment);
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_gl.LinkProgram(_handle);
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string infoLog = _gl.GetProgramInfoLog(_handle);
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if (!string.IsNullOrWhiteSpace(infoLog))
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{
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throw new Exception($"Program failed to link with error: {infoLog}");
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}
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_gl.DetachShader(_handle, vertex);
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_gl.DetachShader(_handle, fragment);
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}
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public void Use()
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{
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_gl.UseProgram(_handle);
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}
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public void SetUniform(string name, int value)
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{
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int location = _gl.GetUniformLocation(_handle, name);
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if (location == -1)
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{
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throw new Exception($"{name} uniform not found on shader.");
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}
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Use();
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_gl.Uniform1(location, value);
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}
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public unsafe void SetUniform(string name, Matrix4x4 value)
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{
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int location = _gl.GetUniformLocation(_handle, name);
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if (location == -1)
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{
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throw new Exception($"{name} uniform not found on shader.");
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}
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Use();
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_gl.UniformMatrix4(location, 1, false, (float*)&value);
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}
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public void SetUniform(string name, float value)
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{
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int location = _gl.GetUniformLocation(_handle, name);
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if (location == -1)
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{
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throw new Exception($"{name} uniform not found on shader.");
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}
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Use();
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_gl.Uniform1(location, value);
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}
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public void Dispose()
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{
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_gl.DeleteProgram(_handle);
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}
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private uint LoadShader(ShaderType type, string path)
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{
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string src = File.ReadAllText(path);
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uint handle = _gl.CreateShader(type);
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_gl.ShaderSource(handle, src);
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_gl.CompileShader(handle);
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string infoLog = _gl.GetShaderInfoLog(handle);
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if (!string.IsNullOrWhiteSpace(infoLog))
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{
84+
throw new Exception($"Error compiling shader of type {type}, failed with error {infoLog}");
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}
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return handle;
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}
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}
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}

‎examples/CSharp/OpenGL/Tutorial 1.5 - Transformations/Shader.frag

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#version 330 core
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in vec2 fUv;
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uniform sampler2D uTexture0;
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out vec4 FragColor;
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void main()
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{
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FragColor = texture(uTexture0, fUv);
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}

‎examples/CSharp/OpenGL/Tutorial 1.5 - Transformations/Shader.vert

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#version 330 core
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layout (location = 0) in vec3 vPos;
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layout (location = 1) in vec2 vUv;
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uniform mat4 uModel;
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out vec2 fUv;
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void main()
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{
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gl_Position = uModel * vec4(vPos, 1.0);
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fUv = vUv;
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}

‎examples/CSharp/OpenGL/Tutorial 1.5 - Transformations/Texture.cs

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using Silk.NET.OpenGL;
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using System;
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using SixLabors.ImageSharp;
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using SixLabors.ImageSharp.PixelFormats;
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using System.Runtime.InteropServices;
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using SixLabors.ImageSharp.Advanced;
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namespace Tutorial
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{
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public class Texture : IDisposable
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{
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private uint _handle;
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private GL _gl;
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public unsafe Texture(GL gl, string path)
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{
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Image<Rgba32> img = (Image<Rgba32>)Image.Load(path);
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fixed (void* data = &MemoryMarshal.GetReference(img.GetPixelSpan()))
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{
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Load(gl, data, (uint)img.Width, (uint)img.Height);
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}
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img.Dispose();
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}
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public unsafe Texture(GL gl, byte[] data, uint width, uint height)
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{
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fixed (void* d = &data[0])
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{
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Load(gl, d, width, height);
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}
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}
34+
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private unsafe void Load(GL gl, void* data, uint width, uint height)
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{
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_gl = gl;
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_handle = _gl.GenTexture();
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Bind();
41+
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_gl.TexImage2D(TextureTarget.Texture2D, 0, (int)GLEnum.Rgba, width, height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, data);
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_gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)GLEnum.ClampToEdge);
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_gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)GLEnum.ClampToEdge);
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_gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)GLEnum.Linear);
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_gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)GLEnum.Linear);
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_gl.GenerateMipmap(TextureTarget.Texture2D);
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}
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public void Bind(TextureUnit textureSlot = TextureUnit.Texture0)
51+
{
52+
_gl.ActiveTexture(textureSlot);
53+
_gl.BindTexture(TextureTarget.Texture2D, _handle);
54+
}
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public void Dispose()
57+
{
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_gl.DeleteTexture(_handle);
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}
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}
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}

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