protected override void OnDraw(FrameArgs e)
{
base.OnDraw(e);
// the first stage draws the sprite to the frame buffer with
// a horizontal blur
using (_fbcam.Begin()) { // using the camera...
using (_fb.Begin()) { // ...and drawing to buffer...
using (_matHblur.Begin()) { // ...and blur mat...
// since a material was put in scope, it overrides
// the sprite's built-in material
_sprites["star"].Draw(Matrix4.Identity);
}
}
}
// the second stage draws the sprite with a vertical blur
// to the screen. normal sprites are drawn last to create
// a glow effect on the rightmost sprite.
using (_cam.Begin()) {
using (_matVblur.Begin()) {
// draw blurred sprite in middle
_quad.Draw(Matrix4.Identity);
// draw blurred sprighte on right
_quad.Draw(Matrix4.CreateTranslation(128, 0, 0));
}
// draw sprite on left
_sprites["star"].Draw(Matrix4.CreateTranslation(-128, 0, 1));
// draw sprite on right on top of blurred sprite
_sprites["star"].Draw(Matrix4.CreateTranslation(128, 0, 1));
}
}
void FadeTo(Scene nextScene, Start startArgs, FrameArgs frameArgs)
{
if (_scene == null)
{
throw new InvalidOperationException("No current scene to crossfade from!");
}
var prevScene = _scene;
_scene = nextScene;
_t = 0;
_fading = true;
if (_duration <= 0)
{
Skip();
}
else
{
if (_prevTexture == null)
{
_prevTexture = new Texture(new System.Drawing.Size((int)startArgs.Size.X, (int)startArgs.Size.Y));
}
if (_nextTexture == null)
{
_nextTexture = new Texture(new System.Drawing.Size((int)startArgs.Size.X, (int)startArgs.Size.Y));
}
if (_prevFBO == null)
{
_prevFBO = new FrameBuffer(_prevTexture);
}
if (_nextFBO == null)
{
_nextFBO = new FrameBuffer(_nextTexture);
}
using (_prevFBO.Begin()) {
if (prevScene != null)
{
prevScene.DrawNow(frameArgs);
}
else
{
base.OnDraw(frameArgs);
}
}
View.RenderNow();
}
if (prevScene != null && _disposeCurrent)
{
prevScene.Dispose();
}
View.LoadFrame();
}
public static CubeMapTexture Generate(int seed, int resolution, int samples)
{
var rand = seed == 0 ? new Random() : new Random(seed);
var stars = Star.Generate(rand, rand.Next(16384, 32768));
var dusts = DustCloud.Generate(rand, rand.Next(4096, 8192));
int renderResolution = resolution * samples;
var camera = new Camera(renderResolution, renderResolution, MathHelper.PiOver2, 4f, 64f);
var starShader = new StarShader {
Camera = camera
};
var dustShader = new DustCloudShader {
Camera = camera
};
var target = new FrameBuffer(new BitmapTexture2D(new Bitmap(renderResolution, renderResolution)), 16);
var angles = new[] {
Tuple.Create(0f, MathHelper.PiOver2),
Tuple.Create(0f, -MathHelper.PiOver2),
Tuple.Create(MathHelper.PiOver2, 0f),
Tuple.Create(-MathHelper.PiOver2, 0f),
Tuple.Create(0f, 0f),
Tuple.Create(0f, MathHelper.Pi)
};
var bmps = new Bitmap[6];
target.Begin();
GL.ClearColor(Color.Black);
var bmp = new Bitmap(renderResolution, renderResolution);
for (int i = 0; i < 6; ++i)
{
camera.Pitch = angles[i].Item1;
camera.Yaw = angles[i].Item2;
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
dustShader.BeginBatch();
foreach (var dust in dusts)
{
dustShader.Render(dust);
}
dustShader.EndBatch();
starShader.BeginBatch();
foreach (var star in stars)
{
starShader.Render(star);
}
starShader.EndBatch();
var data = bmp.LockBits(new Rectangle(0, 0, renderResolution, renderResolution), ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.ReadPixels(0, 0, renderResolution, renderResolution, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, data.Scan0);
bmp.UnlockBits(data);
bmps[i] = new Bitmap(bmp, new Size(resolution, resolution));
}
bmp.Dispose();
target.End();
target.Dispose();
return(new CubeMapTexture(bmps[0], bmps[1], bmps[2], bmps[3], bmps[4], bmps[5]));
}