//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="CascadedShadowMapRenderer"/> class.
/// </summary>
/// <param name="renderCallback">
/// The method which renders the scene into the shadow map. Must not be <see langword="null"/>.
/// See <see cref="RenderCallback"/> for more information.
/// </param>
public CascadedShadowMapRenderer(Func<RenderContext, bool> renderCallback)
{
if (renderCallback == null)
throw new ArgumentNullException("renderCallback");
RenderCallback = renderCallback;
_splitVolume = new PerspectiveViewVolume();
_orthographicCameraNode = new CameraNode(new Camera(new OrthographicProjection()));
}
// Creates a lot of random objects.
private void CreateRandomObjects()
{
var random = new Random();
var isFirstHeightField = true;
int currentShape = 0;
int numberOfObjects = 0;
while (true)
{
numberOfObjects++;
if (numberOfObjects > ObjectsPerType)
{
currentShape++;
numberOfObjects = 0;
}
Shape shape;
switch (currentShape)
{
case 0:
// Box
shape = new BoxShape(ObjectSize, ObjectSize * 2, ObjectSize * 3);
break;
case 1:
// Capsule
shape = new CapsuleShape(0.3f * ObjectSize, 2 * ObjectSize);
break;
case 2:
// Cone
shape = new ConeShape(1 * ObjectSize, 2 * ObjectSize);
break;
case 3:
// Cylinder
shape = new CylinderShape(0.4f * ObjectSize, 2 * ObjectSize);
break;
case 4:
// Sphere
shape = new SphereShape(ObjectSize);
break;
case 5:
// Convex hull of several points.
ConvexHullOfPoints hull = new ConvexHullOfPoints();
hull.Points.Add(new Vector3F(-1 * ObjectSize, -2 * ObjectSize, -1 * ObjectSize));
hull.Points.Add(new Vector3F(2 * ObjectSize, -1 * ObjectSize, -0.5f * ObjectSize));
hull.Points.Add(new Vector3F(1 * ObjectSize, 2 * ObjectSize, 1 * ObjectSize));
hull.Points.Add(new Vector3F(-1 * ObjectSize, 2 * ObjectSize, 1 * ObjectSize));
hull.Points.Add(new Vector3F(-1 * ObjectSize, 0.7f * ObjectSize, -0.6f * ObjectSize));
shape = hull;
break;
case 6:
// A composite shape: two boxes that form a "T" shape.
var composite = new CompositeShape();
composite.Children.Add(
new GeometricObject(
new BoxShape(ObjectSize, 3 * ObjectSize, ObjectSize),
new Pose(new Vector3F(0, 0, 0))));
composite.Children.Add(
new GeometricObject(
new BoxShape(2 * ObjectSize, ObjectSize, ObjectSize),
new Pose(new Vector3F(0, 2 * ObjectSize, 0))));
shape = composite;
break;
case 7:
shape = new CircleShape(ObjectSize);
break;
case 8:
{
var compBvh = new CompositeShape();
compBvh.Children.Add(new GeometricObject(new BoxShape(0.5f, 1, 0.5f), new Pose(new Vector3F(0, 0.5f, 0), Matrix33F.Identity)));
compBvh.Children.Add(new GeometricObject(new BoxShape(0.8f, 0.5f, 0.5f), new Pose(new Vector3F(0.5f, 0.7f, 0), Matrix33F.CreateRotationZ(-MathHelper.ToRadians(15)))));
compBvh.Children.Add(new GeometricObject(new SphereShape(0.3f), new Pose(new Vector3F(0, 1.15f, 0), Matrix33F.Identity)));
compBvh.Children.Add(new GeometricObject(new CapsuleShape(0.2f, 1), new Pose(new Vector3F(0.6f, 1.15f, 0), Matrix33F.CreateRotationX(0.3f))));
compBvh.Partition = new AabbTree<int>();
shape = compBvh;
break;
}
case 9:
CompositeShape comp = new CompositeShape();
comp.Children.Add(new GeometricObject(new BoxShape(0.5f * ObjectSize, 1 * ObjectSize, 0.5f * ObjectSize), new Pose(new Vector3F(0, 0.5f * ObjectSize, 0), QuaternionF.Identity)));
comp.Children.Add(new GeometricObject(new BoxShape(0.8f * ObjectSize, 0.5f * ObjectSize, 0.5f * ObjectSize), new Pose(new Vector3F(0.3f * ObjectSize, 0.7f * ObjectSize, 0), QuaternionF.CreateRotationZ(-MathHelper.ToRadians(45)))));
comp.Children.Add(new GeometricObject(new SphereShape(0.3f * ObjectSize), new Pose(new Vector3F(0, 1.15f * ObjectSize, 0), QuaternionF.Identity)));
shape = comp;
break;
case 10:
shape = new ConvexHullOfPoints(new[]
{
new Vector3F(-1 * ObjectSize, -2 * ObjectSize, -1 * ObjectSize),
new Vector3F(2 * ObjectSize, -1 * ObjectSize, -0.5f * ObjectSize),
new Vector3F(1 * ObjectSize, 2 * ObjectSize, 1 * ObjectSize),
new Vector3F(-1 * ObjectSize, 2 * ObjectSize, 1 * ObjectSize),
new Vector3F(-1 * ObjectSize, 0.7f * ObjectSize, -0.6f * ObjectSize)
});
break;
case 11:
ConvexHullOfShapes shapeHull = new ConvexHullOfShapes();
shapeHull.Children.Add(new GeometricObject(new SphereShape(0.3f * ObjectSize), new Pose(new Vector3F(0, 2 * ObjectSize, 0), Matrix33F.Identity)));
shapeHull.Children.Add(new GeometricObject(new BoxShape(1 * ObjectSize, 2 * ObjectSize, 3 * ObjectSize), Pose.Identity));
shape = shapeHull;
break;
case 12:
shape = Shape.Empty;
break;
case 13:
var numberOfSamplesX = 10;
var numberOfSamplesZ = 10;
var samples = new float[numberOfSamplesX * numberOfSamplesZ];
for (int z = 0; z < numberOfSamplesZ; z++)
for (int x = 0; x < numberOfSamplesX; x++)
samples[z * numberOfSamplesX + x] = (float)(Math.Cos(z / 3f) * Math.Sin(x / 2f) * BoxSize / 6);
HeightField heightField = new HeightField(0, 0, 2 * BoxSize, 2 * BoxSize, samples, numberOfSamplesX, numberOfSamplesZ);
shape = heightField;
break;
//case 14:
//shape = new LineShape(new Vector3F(0.1f, 0.2f, 0.3f), new Vector3F(0.1f, 0.2f, -0.3f).Normalized);
//break;
case 15:
shape = new LineSegmentShape(
new Vector3F(0.1f, 0.2f, 0.3f), new Vector3F(0.1f, 0.2f, 0.3f) + 3 * ObjectSize * new Vector3F(0.1f, 0.2f, -0.3f));
break;
case 16:
shape = new MinkowskiDifferenceShape
{
ObjectA = new GeometricObject(new SphereShape(0.1f * ObjectSize)),
ObjectB = new GeometricObject(new BoxShape(1 * ObjectSize, 2 * ObjectSize, 3 * ObjectSize))
};
break;
case 17:
shape = new MinkowskiSumShape
{
ObjectA = new GeometricObject(new SphereShape(0.1f * ObjectSize)),
ObjectB = new GeometricObject(new BoxShape(1 * ObjectSize, 2 * ObjectSize, 3 * ObjectSize)),
};
break;
case 18:
shape = new OrthographicViewVolume(0, ObjectSize, 0, ObjectSize, ObjectSize / 2, ObjectSize * 2);
break;
case 19:
shape = new PerspectiveViewVolume(MathHelper.ToRadians(60f), 16f / 10, ObjectSize / 2, ObjectSize * 3);
break;
case 20:
shape = new PointShape(0.1f, 0.3f, 0.2f);
break;
case 21:
shape = new RayShape(new Vector3F(0.2f, 0, -0.12f), new Vector3F(1, 2, 3).Normalized, ObjectSize * 2);
break;
case 22:
shape = new RayShape(new Vector3F(0.2f, 0, -0.12f), new Vector3F(1, 2, 3).Normalized, ObjectSize * 2)
{
StopsAtFirstHit = true
};
break;
case 23:
shape = new RectangleShape(ObjectSize, ObjectSize * 2);
break;
case 24:
shape = new TransformedShape(
new GeometricObject(
new BoxShape(1 * ObjectSize, 2 * ObjectSize, 3 * ObjectSize),
new Pose(new Vector3F(0.1f, 1, -0.2f))));
break;
case 25:
shape = new TriangleShape(
new Vector3F(ObjectSize, 0, 0), new Vector3F(0, ObjectSize, 0), new Vector3F(ObjectSize, ObjectSize, ObjectSize));
break;
//case 26:
// {
// // Create a composite object from which we get the mesh.
// CompositeShape compBvh = new CompositeShape();
// compBvh.Children.Add(new GeometricObject(new BoxShape(0.5f, 1, 0.5f), new Pose(new Vector3F(0, 0.5f, 0), Matrix33F.Identity)));
// compBvh.Children.Add(
// new GeometricObject(
// new BoxShape(0.8f, 0.5f, 0.5f),
// new Pose(new Vector3F(0.5f, 0.7f, 0), Matrix33F.CreateRotationZ(-(float)MathHelper.ToRadians(15)))));
// compBvh.Children.Add(new GeometricObject(new SphereShape(0.3f), new Pose(new Vector3F(0, 1.15f, 0), Matrix33F.Identity)));
// compBvh.Children.Add(
// new GeometricObject(new CapsuleShape(0.2f, 1), new Pose(new Vector3F(0.6f, 1.15f, 0), Matrix33F.CreateRotationX(0.3f))));
// TriangleMeshShape meshBvhShape = new TriangleMeshShape { Mesh = compBvh.GetMesh(0.01f, 3) };
// meshBvhShape.Partition = new AabbTree<int>();
// shape = meshBvhShape;
// break;
// }
//case 27:
// {
// // Create a composite object from which we get the mesh.
// CompositeShape compBvh = new CompositeShape();
// compBvh.Children.Add(new GeometricObject(new BoxShape(0.5f, 1, 0.5f), new Pose(new Vector3F(0, 0.5f, 0), QuaternionF.Identity)));
// compBvh.Children.Add(
// new GeometricObject(
// new BoxShape(0.8f, 0.5f, 0.5f),
// new Pose(new Vector3F(0.5f, 0.7f, 0), QuaternionF.CreateRotationZ(-(float)MathHelper.ToRadians(15)))));
// compBvh.Children.Add(new GeometricObject(new SphereShape(0.3f), new Pose(new Vector3F(0, 1.15f, 0), QuaternionF.Identity)));
// compBvh.Children.Add(
// new GeometricObject(new CapsuleShape(0.2f, 1), new Pose(new Vector3F(0.6f, 1.15f, 0), QuaternionF.CreateRotationX(0.3f))));
// TriangleMeshShape meshBvhShape = new TriangleMeshShape { Mesh = compBvh.GetMesh(0.01f, 3) };
// meshBvhShape.Partition = new AabbTree<int>();
// shape = meshBvhShape;
// break;
// }
case 28:
shape = new ConvexPolyhedron(new[]
{
new Vector3F(-1 * ObjectSize, -2 * ObjectSize, -1 * ObjectSize),
new Vector3F(2 * ObjectSize, -1 * ObjectSize, -0.5f * ObjectSize),
new Vector3F(1 * ObjectSize, 2 * ObjectSize, 1 * ObjectSize),
new Vector3F(-1 * ObjectSize, 2 * ObjectSize, 1 * ObjectSize),
new Vector3F(-1 * ObjectSize, 0.7f * ObjectSize, -0.6f * ObjectSize)
});
break;
case 29:
return;
default:
currentShape++;
continue;
}
// Create an object with the random shape, pose, color and velocity.
Pose randomPose = new Pose(
random.NextVector3F(-BoxSize + ObjectSize * 2, BoxSize - ObjectSize * 2),
random.NextQuaternionF());
var newObject = new MovingGeometricObject
{
Pose = randomPose,
Shape = shape,
LinearVelocity = random.NextQuaternionF().Rotate(new Vector3F(MaxLinearVelocity, 0, 0)),
AngularVelocity = random.NextQuaternionF().Rotate(Vector3F.Forward)
* RandomHelper.Random.NextFloat(0, MaxAngularVelocity),
};
if (RandomHelper.Random.NextBool())
newObject.LinearVelocity = Vector3F.Zero;
if (RandomHelper.Random.NextBool())
newObject.AngularVelocity = Vector3F.Zero;
if (shape is LineShape || shape is HeightField)
{
// Do not move lines or the height field.
newObject.LinearVelocity = Vector3F.Zero;
newObject.AngularVelocity = Vector3F.Zero;
}
// Create only 1 heightField!
if (shape is HeightField)
{
if (isFirstHeightField)
{
isFirstHeightField = true;
newObject.Pose = new Pose(new Vector3F(-BoxSize, -BoxSize, -BoxSize));
}
else
{
currentShape++;
numberOfObjects = 0;
continue;
}
}
// Add collision object to collision domain.
_domain.CollisionObjects.Add(new CollisionObject(newObject));
//co.Type = CollisionObjectType.Trigger;
//co.Name = "Object" + shape.GetType().Name + "_" + i;
}
}
public override void Update(GameTime gameTime)
{
Random random = new Random(1234567);
// The debug renderer stores all draw commands. In this sample we recreate
// the draw jobs each frame. --> Clear draw jobs of last frame.
_debugRenderer.Clear();
// The DebugRenderer can draw stuff "in" the scene (enabled z test) or "over"
// the scene (disabled z test).
// Draw some points and line "in" and "over" the scene.
for (int i = 0; i < 10; i++)
{
var position = new Vector3F(-6, 0, -3) + random.NextVector3F(-0.5f, 0.5f);
_debugRenderer.DrawPoint(position, Color.Green, false);
}
for (int i = 0; i < 10; i++)
{
var position = new Vector3F(-4, 0, -3) + random.NextVector3F(-0.5f, 0.5f);
_debugRenderer.DrawPoint(position, Color.Yellow, true);
}
for (int i = 0; i < 10; i++)
{
var start = new Vector3F(-2, 0, -3) + random.NextVector3F(-0.5f, 0.5f);
var end = new Vector3F(-2, 0, -3) + random.NextVector3F(-0.5f, 0.5f);
_debugRenderer.DrawLine(start, end, Color.Green, false);
}
for (int i = 0; i < 10; i++)
{
var start = new Vector3F(0, 0, -3) + random.NextVector3F(-0.5f, 0.5f);
var end = new Vector3F(0, 0, -3) + random.NextVector3F(-0.5f, 0.5f);
_debugRenderer.DrawLine(start, end, Color.Yellow, true);
}
// Text without a specified position is drawn at a default position.
_debugRenderer.DefaultTextPosition = new Vector2F(10, 100);
_debugRenderer.DrawText("White objects are positioned in screen space.");
_debugRenderer.DrawText("Yellow objects are positioned in world space. Depth test disabled.");
_debugRenderer.DrawText("Other objects are positioned in world space. Depth test enabled.");
// Text can also be drawn in world space coordinates or in screen space coordinates.
_debugRenderer.DrawText("WorldSpacePosition (0, 0, 0)", new Vector3F(0, 0, 0), Color.Green, false);
_debugRenderer.DrawText("WorldSpacePosition (0, 0, -1)", new Vector3F(0, 0, -1), Color.Yellow, true);
_debugRenderer.DrawText("ScreenPosition (600, 40)", new Vector2F(600, 40), Color.White);
_debugRenderer.DrawText("ScreenPosition (640, 360)", new Vector2F(640, 360), Color.White);
// It is often useful to copy textures to the screen for debugging.
_debugRenderer.DrawTexture(NoiseHelper.GetGrainTexture(GraphicsService, 128), new Rectangle(1000, 10, 128, 128));
// Axes can be drawn to display poses (positions and orientations).
_debugRenderer.DrawAxes(new Pose(new Vector3F(0, 0, 0)), 1, true);
// Axis-aligned bounding boxes (AABB)
_debugRenderer.DrawAabb(new Aabb(new Vector3F(-0.5f), new Vector3F(0.5f)), new Pose(new Vector3F(2, 0, -3)), Color.Green, false);
_debugRenderer.DrawAabb(new Aabb(new Vector3F(-0.5f), new Vector3F(0.5f)), new Pose(new Vector3F(4, 0, -3)), Color.Yellow, true);
// Box shapes
var orientation = random.NextQuaternionF();
_debugRenderer.DrawBox(1, 1, 1, new Pose(new Vector3F(-6, 0, -5), orientation), new Color(255, 0, 0, 100), false, false);
_debugRenderer.DrawBox(1, 1, 1, new Pose(new Vector3F(-6, 0, -5), orientation), Color.Green, true, false);
_debugRenderer.DrawBox(1, 1, 1, new Pose(new Vector3F(-4, 0, -5), orientation), Color.Yellow, true, true);
// View volumes (frustums)
var viewVolume = new PerspectiveViewVolume(1, 2, 0.1f, 1f);
_debugRenderer.DrawViewVolume(viewVolume, new Pose(new Vector3F(-2, 0, -5), orientation), new Color(0, 255, 0, 100), false, false);
_debugRenderer.DrawViewVolume(viewVolume, new Pose(new Vector3F(-2, 0, -5), orientation), Color.Green, true, false);
_debugRenderer.DrawViewVolume(viewVolume, new Pose(new Vector3F(0, 0, -5), orientation), Color.Yellow, true, true);
// Spheres
_debugRenderer.DrawSphere(0.5f, new Pose(new Vector3F(2, 0, -5), orientation), new Color(0, 0, 255, 100), false, false);
_debugRenderer.DrawSphere(0.5f, new Pose(new Vector3F(2, 0, -5), orientation), Color.Green, true, false);
_debugRenderer.DrawSphere(0.5f, new Pose(new Vector3F(4, 0, -5), orientation), Color.Yellow, true, true);
// Capsules
_debugRenderer.DrawCapsule(0.3f, 1, new Pose(new Vector3F(-6, 0, -7), orientation), new Color(255, 255, 0, 100), false, false);
_debugRenderer.DrawCapsule(0.3f, 1, new Pose(new Vector3F(-6, 0, -7), orientation), Color.Green, true, false);
_debugRenderer.DrawCapsule(0.3f, 1, new Pose(new Vector3F(-4, 0, -7), orientation), Color.Yellow, true, true);
// Cylinders
_debugRenderer.DrawCylinder(0.3f, 1, new Pose(new Vector3F(-2, 0, -7), orientation), new Color(255, 0, 255, 100), false, false);
_debugRenderer.DrawCylinder(0.3f, 1, new Pose(new Vector3F(-2, 0, -7), orientation), Color.Green, true, false);
_debugRenderer.DrawCylinder(0.3f, 1, new Pose(new Vector3F(0, 0, -7), orientation), Color.Yellow, true, true);
// Cones
_debugRenderer.DrawCone(0.3f, 1, new Pose(new Vector3F(2, 0, -7), orientation), new Color(0, 255, 255, 100), false, false);
_debugRenderer.DrawCone(0.3f, 1, new Pose(new Vector3F(2, 0, -7), orientation), Color.Green, true, false);
_debugRenderer.DrawCone(0.3f, 1, new Pose(new Vector3F(4, 0, -7), orientation), Color.Yellow, true, true);
// The debug renderer can draw any IGeometricObjects, like SceneNodes, RigidBodies, etc.
_debugRenderer.DrawObject(_geometricObject, Color.Brown, false, false);
_debugRenderer.DrawObject(_geometricObject, Color.Yellow, true, true);
// The debug renderer can also an XNA model (without materials).
_debugRenderer.DrawModel(_xnaModel, new Pose(new Vector3F(0, 2, -2), orientation), new Vector3F(1, 2, 1), new Color(128, 255, 64, 100), false, false);
_debugRenderer.DrawModel(_xnaModel, new Pose(new Vector3F(0, 2, -2), orientation), new Vector3F(1, 2, 1), Color.LightCyan, true, false);
// Draw a DigitalRune model.
_debugRenderer.DrawModel(_modelNode, Color.Peru, true, false);
// Draw the bounding shapes of the meshes in this model.
foreach (var node in _modelNode.GetSubtree())
_debugRenderer.DrawObject(node, Color.PeachPuff, true, false);
}
//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="VarianceShadowMapRenderer"/> class.
/// </summary>
/// <param name="render">
/// The method which renders the scene into the shadow map. Must not be <see langword="null"/>.
/// See <see cref="RenderCallback"/> for more information.
/// </param>
public VarianceShadowMapRenderer(Func<RenderContext, bool> render)
{
if (render == null)
throw new ArgumentNullException("render");
RenderCallback = render;
_cameraVolume = new PerspectiveViewVolume();
_orthographicCameraNode = new CameraNode(new Camera(new OrthographicProjection()));
}
/// <summary>
/// Initializes a new instance of the <see cref="OcclusionBuffer"/> class with the specified
/// buffer size.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <param name="width">The width of the occlusion buffer.</param>
/// <param name="height">The height of the occlusion buffer.</param>
/// <param name="bufferSize">
/// The size of the internal triangle buffer (= max number of occluder triangles that can be
/// rendered in a single draw call). Needs to be large enough to store the most complex
/// occluder.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public OcclusionBuffer(IGraphicsService graphicsService, int width, int height, int bufferSize)
{
if (graphicsService == null)
throw new ArgumentNullException("graphicsService");
// For simplicity only accept power-of-two formats.
if (!MathHelper.IsPowerOf2(width) && !MathHelper.IsPowerOf2(height))
throw new ArgumentException("Width and height of occlusion buffer expected to be a power of two.");
// The current texture atlas layout assumes that width ≥ height.
if (width < height)
throw new ArgumentException("Width expected to be greater than or equal to the height of the occlusion buffer.");
var graphicsDevice = graphicsService.GraphicsDevice;
if (bufferSize < 1)
throw new ArgumentOutOfRangeException("bufferSize", "The buffer size needs to be creater than 1.");
if (bufferSize >= graphicsDevice.GetMaxPrimitivesPerCall())
throw new ArgumentOutOfRangeException("bufferSize", "The buffer size exceeds the max number of primitives supported by the current graphics device.");
// ----- RenderBatch handles occluders.
// bufferSize is the max number of triangles per draw call.
// Vertex buffer size:
// - In the worst case n triangles need n * 3 vertices.
// - The max size is limited to 65536 because 16-bit indices are used.
var vertices = new Vector3F[Math.Min(bufferSize * 3, ushort.MaxValue + 1)];
// Index buffer size: number of triangles * 3
var indices = new ushort[bufferSize * 3];
_renderBatch = new RenderBatch<Vector3F, ushort>(
graphicsDevice,
VertexPosition.VertexDeclaration,
vertices, true,
indices, true);
_effect = graphicsService.Content.Load<Effect>("DigitalRune/OcclusionCulling");
_parameterClampAabbMinimum = _effect.Parameters["ClampAabbMinimum"];
_parameterClampAabbMaximum = _effect.Parameters["ClampAabbMaximum"];
_parameterCameraViewProj = _effect.Parameters["CameraViewProj"];
_parameterCameraNear = _effect.Parameters["CameraNear"];
_parameterCameraFar = _effect.Parameters["CameraFar"];
_parameterCameraPosition = _effect.Parameters["CameraPosition"];
_parameterNormalizationFactor = _effect.Parameters["NormalizationFactor"];
_parameterLightViewProj = _effect.Parameters["LightViewProj"];
_parameterLightToCamera = _effect.Parameters["LightToCamera"];
_parameterHzbSize = _effect.Parameters["HzbSize"];
_parameterTargetSize = _effect.Parameters["TargetSize"];
_parameterAtlasSize = _effect.Parameters["AtlasSize"];
_parameterTexelOffset = _effect.Parameters["TexelOffset"];
_parameterHalfTexelOffset = _effect.Parameters["HalfTexelOffset"];
_parameterMaxLevel = _effect.Parameters["MaxLevel"];
_parameterHzbTexture = _effect.Parameters["HzbTexture"];
_parameterLightHzbTexture = _effect.Parameters["LightHzb"];
_parameterDebugLevel = _effect.Parameters["DebugLevel"];
_parameterDebugMinimum = _effect.Parameters["DebugMinimum"];
_parameterDebugMaximum = _effect.Parameters["DebugMaximum"];
_techniqueOccluder = _effect.Techniques["Occluder"];
_techniqueDownsample = _effect.Techniques["Downsample"];
_techniqueCopy = _effect.Techniques["Copy"];
_techniqueQuery = _effect.Techniques["Query"];
_techniqueVisualize = _effect.Techniques["Visualize"];
_occlusionProxies = new List<IOcclusionProxy>();
_sceneNodes = new List<SceneNode>();
// Store delegate methods to avoid garbage.
_updateOcclusionProxies = UpdateOcclusionProxies;
_updateOcclusionProxy = UpdateOcclusionProxy;
_splitVolume = new PerspectiveViewVolume();
_orthographicCameraNode = new CameraNode(new Camera(new OrthographicProjection()));
_shadowCasters = new List<SceneNode>();
/*
// By default, enable multithreading on multi-core systems.
#if WP7 || UNITY
// Cannot access Environment.ProcessorCount in phone app. (Security issue.)
EnableMultithreading = false;
#else
// Enable multithreading by default if the current system has multiple processors.
EnableMultithreading = Environment.ProcessorCount > 1;
// Multithreading works but Parallel.For of Xamarin.Android/iOS is very inefficient.
if (GlobalSettings.PlatformID == PlatformID.Android || GlobalSettings.PlatformID == PlatformID.iOS)
EnableMultithreading = false;
#endif
*/
// Disable multithreading by default. Multithreading causes massive lags in the
// XNA version, but the MonoGame version is not affected!?
EnableMultithreading = false;
// For best performance: Enable progressive shadow caster culling.
ProgressiveShadowCasterCulling = true;
Statistics = new OcclusionCullingStatistics();
InitializeBuffers(graphicsDevice, width, height);
}
public void PerspectiveViewVolumeTest()
{
var s = new PerspectiveViewVolume(0.4f, 2, 0.1f, 1f);
var v0 = s.GetVolume(0.001f, 10);
var m = s.GetMesh(0.001f, 10);
var s1 = new TriangleMeshShape(m);
var v1 = s1.GetVolume(0.0001f, 10);
Assert.IsTrue(Numeric.AreEqual(v0, v1, 0.01f * (1 + v0))); // 1% error is allowed.
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="PerspectiveProjection"/> class.
/// </summary>
public PerspectiveProjection()
{
ViewVolume = new PerspectiveViewVolume();
SetFieldOfView(DefaultFieldOfViewY, DefaultAspectRatio, DefaultNear, DefaultFar);
}