protected override void OnLoad(EventArgs e)
{
this.shaderMan = new ShaderManager();
var shaderLoader = ShaderFileLoader.CreateDefault("shaders");
// load all shaders
var shaders = shaderLoader.Load("").ToList();
this.shaderMan.Add(shaders);
var layerShader = this.shaderMan.MakeShaderProgram()
.WithVertexShader("copy").WithFragmentShader("copy")
.As("layer");
var copyShader = this.shaderMan.MakeShaderProgram()
.WithVertexShader("post").WithFragmentShader("copy")
.As("copypost");
var wispShader = this.shaderMan.MakeShaderProgram()
.WithVertexShader("wisp").WithFragmentShader("wisp")
.As("wisp");
var rayShader = this.shaderMan.MakeShaderProgram()
.WithVertexShader("crepuscularrays")
.WithGeometryShader("crepuscularrays")
.WithFragmentShader("crepuscularrays")
.As("crepuscularrays");
this.renderTexture = new Texture(1, 1);
this.renderTexture.SetParameters(TextureMinFilter.Linear, TextureMagFilter.Linear, TextureWrapMode.ClampToBorder, TextureWrapMode.ClampToBorder);
this.renderTarget = new RenderTarget(this.renderTexture);
var renderTextureUniform = new TextureUniform("diffuseTexture", this.renderTexture);
this.copyToScreen = new PostProcessSurface();
this.copyToScreen.AddSettings(renderTextureUniform, new ColorUniform("color", Color.White));
copyShader.UseOnSurface(this.copyToScreen);
this.raySurface = new VertexSurface<CrepuscularRayVertex>(PrimitiveType.Points);
this.raySurface.AddSettings(renderTextureUniform);
rayShader.UseOnSurface(this.raySurface);
var rayGeo = new CrepuscularRayGeometry(this.raySurface);
const int layerCount = 4;
const float maxBrightness = 0.03f;
const float brightnessStep = maxBrightness / layerCount;
this.layers = Enumerable.Range(0, layerCount).Reverse()
.Select(i => new Layer(layerShader, wispShader, rayGeo, "layer" + i, GameMath.Sqrt(brightnessStep * i), i * i * 5))
.ToList();
InputManager.Initialize(this.Mouse);
}
public Layer(ISurfaceShader shader, ISurfaceShader wispShader, CrepuscularRayGeometry rayGeo, string filename, float brightness, int wisps)
{
this.rayGeo = rayGeo;
var texture = new Texture("gfx/" + filename + ".png", true);
this.surface = new PostProcessSurface();
this.surface.AddSettings(
new TextureUniform("diffuseTexture", texture),
new ColorUniform("color", Color.GrayScale((byte)(255 * brightness)))
);
shader.UseOnSurface(this.surface);
this.wispSurface = new IndexedSurface<UVColorVertexData>();
wispShader.UseOnSurface(this.wispSurface);
this.wispGeo = new Sprite2DGeometry(this.wispSurface)
{
Color = Color.White.WithAlpha()
};
this.wisps = Enumerable.Range(0, wisps)
.Select(i => new Wisp()).ToList();
}
/// <summary>
/// Initializes a new instance of the <see cref="TextureUniform"/> class.
/// </summary>
/// <param name="name">The name of this uniform.</param>
/// <param name="texture">The initial <see cref="Texture"/> value of this uniform.</param>
/// <param name="target">The initial <see cref="TextureUnit"/> used by this uniform.</param>
public TextureUniform(string name, Texture texture, TextureUnit target = TextureUnit.Texture0)
{
this.name = name;
this.Target = target;
this.Texture = texture;
}
/// <summary>
/// Attaches a <see cref="Texture"/> to the specified <see cref="FramebufferAttachment"/>, so it can be rendered to.
/// </summary>
/// <param name="attachment">The attachment.</param>
/// <param name="texture">The texture.</param>
/// <param name="target">Texture target of the attachment.</param>
public void Attach(FramebufferAttachment attachment, Texture texture, TextureTarget target = TextureTarget.Texture2D)
{
GL.BindFramebuffer(FramebufferTarget.DrawFramebuffer, this.handle);
GL.FramebufferTexture2D(FramebufferTarget.DrawFramebuffer, attachment, target, texture, 0);
GL.BindFramebuffer(FramebufferTarget.DrawFramebuffer, 0);
}
/// <summary>
/// Initializes a new instance of the <see cref="RenderTarget"/> class assigning a texture to its default color attachment.
/// </summary>
/// <param name="texture">The texture to attach.</param>
public RenderTarget(Texture texture)
: this()
{
this.Attach(FramebufferAttachment.ColorAttachment0, texture);
}