private void FindSprites(DrawingContext context)
{
if (spriteQuery == null)
{
spriteQuery = context.CreateSpatialQuery <ISprite>(sprite => sprite.Visible);
findSpriteAction = new Action <ISprite>(AddSprite);
}
spriteQuery.FindAll(context.ViewFrustum, findSpriteAction);
}
/// <summary>
/// Draws this pass using the specified drawing context.
/// </summary>
public override void Draw(DrawingContext context, IList <IDrawableObject> drawables)
{
var context3D = context as DrawingContext3D;
Begin(context3D);
{
if (drawingPass == null)
{
drawingPass = new DrawingPass();
drawingPass.MaterialUsage = MaterialUsage.DepthAndNormal;
}
drawingPass.Draw(context, drawables);
}
End(context3D);
context.textures[TextureUsage.DepthBuffer] = depthBuffer;
context.textures[TextureUsage.NormalBuffer] = normalBuffer;
if (lightQuery == null)
{
lightQuery = context.CreateSpatialQuery <IDeferredLight>(null);
deferredLights = new FastList <IDeferredLight>();
}
BeginLights(context3D);
{
lightQuery.FindAll(context.ViewFrustum, deferredLights);
for (int i = 0; i < deferredLights.Count; ++i)
{
DrawLight(context3D, deferredLights[i]);
}
deferredLights.Clear();
}
EndLights(context3D);
context.textures[TextureUsage.LightBuffer] = lightBuffer;
}
public void Draw(DrawingContext context, Material material)
{
Vector3[] positions;
ushort[] indices;
if (geometryQuery == null)
{
geometryQuery = context.CreateSpatialQuery <IGeometry>(null);
}
if (primitive == null)
{
primitive = new DynamicPrimitive(context.GraphicsDevice);
}
// Ray picking
var mouseState = Mouse.GetState();
var pickRay = context.GraphicsDevice.Viewport.CreatePickRay(mouseState.X, mouseState.Y, context.View, context.Projection);
geometryQuery.FindAll(ref pickRay, geometry =>
{
if (geometry.TryGetTriangles(out positions, out indices))
{
var rayInGeometrySpace = pickRay.Transform(Matrix.Invert(geometry.Transform));
for (int i = 0; i < indices.Length; i += 3)
{
var triangle = new Triangle(positions[indices[i]], positions[indices[i + 1]], positions[indices[i + 2]]);
if (triangle.Intersects(rayInGeometrySpace).HasValue)
{
primitive.AddTriangle(triangle, geometry.Transform, new Color(255, 255, 0), 2);
}
}
}
});
// Box picking
var speed = 0.01f;
var keyboard = Keyboard.GetState();
if (keyboard.IsKeyDown(Keys.Left))
{
pickBox.Min += Vector3.Left * speed;
pickBox.Max += Vector3.Left * speed;
}
if (keyboard.IsKeyDown(Keys.Right))
{
pickBox.Min += Vector3.Right * speed;
pickBox.Max += Vector3.Right * speed;
}
if (keyboard.IsKeyDown(Keys.Up))
{
pickBox.Min += Vector3.Forward * speed;
pickBox.Max += Vector3.Forward * speed;
}
if (keyboard.IsKeyDown(Keys.Down))
{
pickBox.Min += Vector3.Backward * speed;
pickBox.Max += Vector3.Backward * speed;
}
if (keyboard.IsKeyDown(Keys.PageUp))
{
pickBox.Min += Vector3.Up * speed;
pickBox.Max += Vector3.Up * speed;
}
if (keyboard.IsKeyDown(Keys.PageDown))
{
pickBox.Min += Vector3.Down * speed;
pickBox.Max += Vector3.Down * speed;
}
primitive.AddBox(pickBox, null, Color.Black, 2);
geometryQuery.FindAll(ref pickBox, geometry =>
{
Matrix transform = geometry.Transform;
if (geometry.TryGetTriangles(out positions, out indices))
{
for (int i = 0; i < indices.Length; i += 3)
{
var triangle = new Triangle(positions[indices[i]], positions[indices[i + 1]], positions[indices[i + 2]]);
Vector3.Transform(ref triangle.V1, ref transform, out triangle.V1);
Vector3.Transform(ref triangle.V2, ref transform, out triangle.V2);
Vector3.Transform(ref triangle.V3, ref transform, out triangle.V3);
var count = triangle.Intersects(ref pickBox, intersections, 0);
if (count > 2)
{
intersections[count++] = intersections[0];
primitive.AddLine(intersections.Take(count), null, new Color(255, 0, 0), 1);
}
}
}
});
// Box Frustum test
primitive.AddFrustum(testFrustum, null, new Color(0, 128, 0) * 0.2f, 4);
var intersectionCount = pickBox.Intersects(testFrustum, intersections, 0);
if (intersectionCount > 2)
{
intersections[intersectionCount++] = intersections[0];
primitive.AddLine(intersections.Take(intersectionCount), null, new Color(0, 0, 255), 4);
}
primitive.Draw(context, null);
primitive.Clear();
}
