/// <summary>
/// Draws the hull.
/// </summary>
/// <param name="drawBuffer">The Lightmap Draw Buffer</param>
public void Draw(ILightmapDrawBuffer drawBuffer)
{
// Create the matrices (3X speed boost versus prior version)
this.cos = (float)Math.Cos(this.angle);
this.sin = (float)Math.Sin(this.angle);
// vertexMatrix = scale * rotation * translation;
this.vertexMatrix.M11 = this.scale.X * this.cos;
this.vertexMatrix.M12 = this.scale.X * this.sin;
this.vertexMatrix.M21 = this.scale.Y * -this.sin;
this.vertexMatrix.M22 = this.scale.Y * this.cos;
this.vertexMatrix.M41 = this.position.X;
this.vertexMatrix.M42 = this.position.Y;
// normalMatrix = scaleInv * rotation;
this.normalMatrix.M11 = (1f / this.scale.X) * this.cos;
this.normalMatrix.M12 = (1f / this.scale.X) * this.sin;
this.normalMatrix.M21 = (1f / this.scale.Y) * -this.sin;
this.normalMatrix.M22 = (1f / this.scale.Y) * this.cos;
drawBuffer.SetStartVertex();
// Add the vertices to the buffer
var hullVerticesLength = this.Vertices.Length;
for (var i = 0; i < hullVerticesLength; i++)
{
// Transform the vertices to world coordinates
this.point = this.Vertices[i];
Vector2.Transform(ref this.point.Position, ref this.vertexMatrix, out this.hullVertex.Position);
Vector2.TransformNormal(ref this.point.Normal, ref this.normalMatrix, out this.hullVertex.Normal);
this.hullVertex.Color = ShadowBlack;
drawBuffer.AddVertex(this.hullVertex);
}
var hullIndicesLength = this.Indices.Length;
for (var i = 0; i < hullIndicesLength; i++)
{
drawBuffer.AddIndex(this.Indices[i]);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="LightmapGenerator"/> class.
/// </summary>
/// <param name="device">The device.</param>
/// <param name="lightmapEffect">The lightmap effect.</param>
/// <param name="drawBuffer">The draw buffer.</param>
public LightmapGenerator(GraphicsDevice device, LightmapEffect lightmapEffect, ILightmapDrawBuffer drawBuffer)
{
this.device = device;
this.lightmapEffect = lightmapEffect;
this.drawBuffer = drawBuffer;
}
/// <summary>
/// Draws the light with shadows from the hulls
/// </summary>
/// <param name="lightmapEffect">The lightmap effect.</param>
/// <param name="helper">The helper.</param>
/// <param name="hulls">The hulls.</param>
public void Draw(LightmapEffect lightmapEffect, ILightmapPass lightmapPass, ILightmapDrawBuffer helper, IEnumerable<IHull> hulls)
{
lightmapEffect.Effect.GraphicsDevice.ScissorRectangle = lightmapPass.GetScissor(this);
// lightmapEffect.Effect.GraphicsDevice.ScissorRectangle = new Rectangle(0, 0, 200, 200);
// 1) Clear hull buffers
helper.Clear();
// 2) Prepare to draw hulls
foreach (var hull in hulls.Where(x => Vector2.DistanceSquared(this.Position, x.Position) < this.RadiusSquared + x.RadiusSquared))
{
hull.Draw(helper);
}
// 3) Set lightmapEffect stuff
lightmapEffect.LightPosition = this.Position;
lightmapEffect.LightTexture = this.Texture;
lightmapEffect.LightInesityFactor = this.IntensityFactor;
switch (this.ShadowType)
{
case ShadowType.Illuminated:
lightmapEffect.CurrentTechnique = lightmapEffect.IlluminatedShadowTechnique;
break;
case ShadowType.Occluded:
lightmapEffect.CurrentTechnique = lightmapEffect.OccludedShadowTechnique;
break;
default:
lightmapEffect.CurrentTechnique = lightmapEffect.SolidShadowTechnique;
break;
}
// 4) Draw hulls for each shadow pass
foreach (var pass in lightmapEffect.CurrentTechnique.Passes)
{
pass.Apply();
helper.Draw();
}
// 5) Draw light for each light pass
lightmapEffect.CurrentTechnique = lightmapEffect.LightTechnique;
foreach (var pass in lightmapEffect.CurrentTechnique.Passes)
{
pass.Apply();
helper.DrawClippedFov(this.Position, this.Rotation, this.Radius * 2, this.Color, this.Fov);
}
// 6) Clear the target's alpha chanel
lightmapEffect.CurrentTechnique = lightmapEffect.AlphaClearTechnique;
//lightmapEffect.Effect.GraphicsDevice.ScissorRectangle = lightmapEffect.Effect.GraphicsDevice.Viewport.Bounds;
foreach (var pass in lightmapEffect.CurrentTechnique.Passes)
{
pass.Apply();
helper.DrawUnitQuad();
}
}