mirror of
https://github.com/Ryujinx/Opentk.git
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274 lines
9.6 KiB
C#
274 lines
9.6 KiB
C#
// This code was written for the OpenTK library and has been released
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// to the Public Domain.
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// It is provided "as is" without express or implied warranty of any kind.
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using System;
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using System.Drawing;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Windows.Forms;
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using System.IO;
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using System.Text;
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using OpenTK;
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using OpenTK.Graphics;
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using OpenTK.Graphics.OpenGL;
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using Examples.Shapes;
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using Examples.TextureLoaders;
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namespace Examples.Tutorial
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{
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[Example("DDS Cube Map", ExampleCategory.OpenGL, "2.x", Documentation = "DDSCubeMap")]
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public class T13_GLSL_Earth: GameWindow
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{
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public T13_GLSL_Earth( )
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: base( 800, 800 )
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{
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}
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#region internal Fields
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// Shader
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int VertexShaderObject, FragmentShaderObject, ProgramObject;
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const string VertexShaderFilename = "Data/Shaders/CubeMap_VS.glsl";
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const string FragmentShaderFilename = "Data/Shaders/CubeMap_FS.glsl";
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// Textures
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const TextureUnit TMU0_Unit = TextureUnit.Texture0;
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const int TMU0_UnitInteger = 0;
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const string TMU0_Filename = "Data/Textures/earth-cubemap.dds";
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uint TMU0_Handle;
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TextureTarget TMU0_Target;
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// DL
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DrawableShape sphere;
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// Camera
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Vector3 EyePos = new Vector3( 0.0f, 0.0f, 6.0f );
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Vector3 Trackball = Vector3.Zero;
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#endregion internal Fields
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/// <summary>Setup OpenGL and load resources here.</summary>
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/// <param name="e">Not used.</param>
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protected override void OnLoad(EventArgs e)
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{
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this.VSync = VSyncMode.Off;
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// Check for necessary capabilities:
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string extensions = GL.GetString(StringName.Extensions);
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if (!GL.GetString(StringName.Extensions).Contains("GL_ARB_shading_language"))
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{
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throw new NotSupportedException(String.Format("This example requires OpenGL 2.0. Found {0}. Aborting.",
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GL.GetString(StringName.Version).Substring(0, 3)));
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}
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if (!extensions.Contains("GL_ARB_texture_compression") ||
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!extensions.Contains("GL_EXT_texture_compression_s3tc"))
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{
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throw new NotSupportedException("This example requires support for texture compression. Aborting.");
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}
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#region GL State
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GL.ClearColor( 0f, 0f, 0f, 0f );
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GL.Disable( EnableCap.Dither );
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GL.Enable( EnableCap.CullFace );
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GL.FrontFace( FrontFaceDirection.Ccw );
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GL.PolygonMode( MaterialFace.Front, PolygonMode.Fill );
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// GL.PolygonMode( MaterialFace.Back, PolygonMode.Line );
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#endregion GL State
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#region Shaders
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string LogInfo;
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// Load&Compile Vertex Shader
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using ( StreamReader sr = new StreamReader( VertexShaderFilename ) )
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{
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VertexShaderObject = GL.CreateShader( ShaderType.VertexShader );
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GL.ShaderSource( VertexShaderObject, sr.ReadToEnd( ) );
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GL.CompileShader( VertexShaderObject );
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}
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GL.GetShaderInfoLog( VertexShaderObject, out LogInfo );
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if ( LogInfo.Length > 0 && !LogInfo.Contains( "hardware" ) )
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Trace.WriteLine( "Vertex Shader failed!\nLog:\n" + LogInfo );
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else
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Trace.WriteLine( "Vertex Shader compiled without complaint." );
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// Load&Compile Fragment Shader
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using ( StreamReader sr = new StreamReader( FragmentShaderFilename ) )
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{
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FragmentShaderObject = GL.CreateShader( ShaderType.FragmentShader );
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GL.ShaderSource( FragmentShaderObject, sr.ReadToEnd( ) );
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GL.CompileShader( FragmentShaderObject );
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}
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GL.GetShaderInfoLog( FragmentShaderObject, out LogInfo );
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if ( LogInfo.Length > 0 && !LogInfo.Contains( "hardware" ) )
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Trace.WriteLine( "Fragment Shader failed!\nLog:\n" + LogInfo );
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else
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Trace.WriteLine( "Fragment Shader compiled without complaint." );
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// Link the Shaders to a usable Program
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ProgramObject = GL.CreateProgram( );
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GL.AttachShader( ProgramObject, VertexShaderObject );
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GL.AttachShader( ProgramObject, FragmentShaderObject );
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// link it all together
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GL.LinkProgram( ProgramObject );
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// flag ShaderObjects for delete when not used anymore
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GL.DeleteShader( VertexShaderObject );
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GL.DeleteShader( FragmentShaderObject );
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int[] temp = new int[1];
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GL.GetProgram(ProgramObject, GetProgramParameterName.LinkStatus, out temp[0]);
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Trace.WriteLine( "Linking Program (" + ProgramObject + ") " + ( ( temp[0] == 1 ) ? "succeeded." : "FAILED!" ) );
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if ( temp[0] != 1 )
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{
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GL.GetProgramInfoLog( ProgramObject, out LogInfo );
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Trace.WriteLine( "Program Log:\n" + LogInfo );
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}
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GL.GetProgram(ProgramObject, GetProgramParameterName.ActiveAttributes, out temp[0]);
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Trace.WriteLine( "Program registered " + temp[0] + " Attributes. (Should be 4: Pos, UV, Normal, Tangent)" );
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Trace.WriteLine( "Tangent attribute bind location: " + GL.GetAttribLocation( ProgramObject, "AttributeTangent" ) );
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Trace.WriteLine( "End of Shader build. GL Error: " + GL.GetError( ) );
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#endregion Shaders
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#region Textures
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TextureLoaderParameters.FlipImages = false;
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TextureLoaderParameters.MagnificationFilter = TextureMagFilter.Linear;
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TextureLoaderParameters.MinificationFilter = TextureMinFilter.Linear;
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TextureLoaderParameters.WrapModeS = TextureWrapMode.ClampToEdge;
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TextureLoaderParameters.WrapModeT = TextureWrapMode.ClampToEdge;
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TextureLoaderParameters.EnvMode = TextureEnvMode.Modulate;
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ImageDDS.LoadFromDisk( TMU0_Filename, out TMU0_Handle, out TMU0_Target );
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Trace.WriteLine( "Loaded " + TMU0_Filename + " with handle " + TMU0_Handle + " as " + TMU0_Target );
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#endregion Textures
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Trace.WriteLine( "End of Texture Loading. GL Error: " + GL.GetError( ) );
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Trace.WriteLine( "");
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sphere = new SlicedSphere(1.5f, Vector3d.Zero, SlicedSphere.eSubdivisions.Four, new SlicedSphere.eDir[] { SlicedSphere.eDir.All }, true);
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}
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protected override void OnUnload(EventArgs e)
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{
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sphere.Dispose();
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GL.DeleteProgram( ProgramObject );
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GL.DeleteTextures( 1, ref TMU0_Handle );
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base.OnUnload( e );
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}
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/// <summary>Respond to resize events here.</summary>
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/// <param name="e">Contains information on the new GameWindow size.</param>
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/// <remarks>There is no need to call the base implementation.</remarks>
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protected override void OnResize( EventArgs e )
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{
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GL.Viewport( 0, 0, Width, Height );
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GL.MatrixMode( MatrixMode.Projection );
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Matrix4 p = Matrix4.CreatePerspectiveFieldOfView(MathHelper.PiOver4, Width / (float)Height, 0.1f, 10.0f);
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GL.LoadMatrix(ref p);
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GL.MatrixMode( MatrixMode.Modelview );
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GL.LoadIdentity( );
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base.OnResize( e );
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}
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/// <summary>Add your game logic here.</summary>
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/// <param name="e">Contains timing information.</param>
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/// <remarks>There is no need to call the base implementation.</remarks>
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protected override void OnUpdateFrame(FrameEventArgs e)
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{
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base.OnUpdateFrame(e);
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var keyboard = OpenTK.Input.Keyboard.GetState();
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var mouse = OpenTK.Input.Mouse.GetState();
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if (keyboard[OpenTK.Input.Key.Escape])
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this.Exit();
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if (keyboard[OpenTK.Input.Key.Space])
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Trace.WriteLine("GL: " + GL.GetError());
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Trackball.X = mouse.X;
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Trackball.Y = mouse.Y;
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Trackball.Z = mouse.Scroll.Y * 0.5f;
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}
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/// <summary>Add your game rendering code here.</summary>
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/// <param name="e">Contains timing information.</param>
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/// <remarks>There is no need to call the base implementation.</remarks>
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protected override void OnRenderFrame(FrameEventArgs e)
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{
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this.Title = "FPS: " + (1 / e.Time).ToString("0.");
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GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
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GL.UseProgram(ProgramObject);
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#region Textures
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GL.ActiveTexture(TMU0_Unit);
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GL.BindTexture(TMU0_Target, TMU0_Handle);
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#endregion Textures
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#region Uniforms
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GL.Uniform1(GL.GetUniformLocation(ProgramObject, "Earth"), TMU0_UnitInteger);
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#endregion Uniforms
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GL.PushMatrix();
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Matrix4 temp = Matrix4.LookAt(EyePos, Vector3.Zero, Vector3.UnitY);
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GL.MultMatrix(ref temp);
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GL.Rotate(Trackball.X, Vector3.UnitY);
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GL.Rotate(Trackball.Y, Vector3.UnitX);
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#region Draw
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GL.Color3(1f, 1f, 1f);
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sphere.Draw();
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#endregion Draw
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GL.PopMatrix();
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this.SwapBuffers();
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}
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/// <summary>Entry point</summary>
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[STAThread]
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public static void Main( )
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{
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using ( T13_GLSL_Earth example = new T13_GLSL_Earth( ) )
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{
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Utilities.SetWindowTitle(example);
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example.Run( 30.0, 0.0 );
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}
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}
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}
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}
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