protected override void Initialise() { Resource.EnableResourceTracking(); //draw targets usually need a camera. Xen.Ex.Camera.FirstPersonControlledCamera3D camera = new Xen.Ex.Camera.FirstPersonControlledCamera3D(this.UpdateManager, Vector3.Zero, false); //don't allow the camera to move too fast camera.MovementSensitivity *= 0.1f; camera.LookAt(new Vector3(0, 3, 0), new Vector3(1, 5, 10), new Vector3(0, 1, 0)); //create the draw target. drawToScreen = new DrawTargetScreen(this, camera); drawToScreen.ClearBuffer.ClearColour = new Color(45, 50, 60); //create the fire and smoke particle system this.fireParticleSystem = new ParticleSystem(this.UpdateManager); this.smokeParticleSystem = new ParticleSystem(this.UpdateManager); //IMPORTANT //The following flags are FALSE by default. //For looping effects, such as the fire and smoke, it's highly //recommended to enable this flag. Otherwise, while the effect //is offscreen, the particle system will continue to process. this.fireParticleSystem.PauseUpdatingWhileCulled = true; this.smokeParticleSystem.PauseUpdatingWhileCulled = true; this.drawSorted = new Xen.Ex.Scene.DepthDrawSorter(Xen.Ex.Scene.DepthSortMode.BackToFront); this.drawUnsorted = new DrawList(); Xen.Ex.Graphics.Display.ParticleDrawer3D fireDrawer = new Xen.Ex.Graphics.Display.VelocityBillboardParticles3D(this.fireParticleSystem, true); Xen.Ex.Graphics.Display.ParticleDrawer3D smokeDrawer = new Xen.Ex.Graphics.Display.BillboardParticles3D(this.smokeParticleSystem); for (int i = 0; i < 10; i++) { Vector3 position = new Vector3((float)Math.Cos(i * Math.PI / 5.0) * 6.0f, 0, (float)Math.Sin(i * Math.PI / 5.0) * 6.0f); CullableParticleWrapper fireEffect, smokeEffect; fireEffect = new CullableParticleWrapper(fireDrawer, position, new Vector3(0, 2, 0), 4); smokeEffect = new CullableParticleWrapper(smokeDrawer, position, new Vector3(0, 6, 0), 5); this.drawSorted.Add(fireEffect); this.drawSorted.Add(smokeEffect); this.drawUnsorted.Add(fireEffect); this.drawUnsorted.Add(smokeEffect); GroundLightDisk light = new GroundLightDisk(position); this.drawSorted.Add(light); this.drawUnsorted.Add(light); } //setup the burst effect this.burstParticleSystem = new ParticleSystem(this.UpdateManager); //for this case, PauseUpdatingWhileCulled is not set to true. //The particle emitting is culled when offscreen. If set to true, //Any particles left offscreen could 'pause', when they naturally //wouldn't be emitted anyway. //(The particle system will use very few resources when it has no //active particles) this.burstSources = new BurstSource[20]; Random rand = new Random(); for (int i = 0; i < this.burstSources.Length; i++) { //create the bursts out in the distance Vector3 position = new Vector3((float)i * 5.0f - this.burstSources.Length * 2.5f, 0, -20); float radius = 10; // with a decent radius //give them a random starting time this.burstSources[i] = new BurstSource(position, radius, (float)rand.NextDouble() * 2); this.drawSorted.Add(this.burstSources[i]); this.drawUnsorted.Add(this.burstSources[i]); } //the bursts need to be drawn as a group.. ParticleDrawer3D burstDrawer = new Xen.Ex.Graphics.Display.VelocityBillboardParticles3D(this.burstParticleSystem, false, 0.5f); this.drawSorted.Add(burstDrawer); this.drawUnsorted.Add(burstDrawer); //Use all the burst sources to cull the drawer (may not be ideal if there were many sources...) //Use the particle drawer CullProxy to do it burstDrawer.CullProxy = new BurstCullProxy(this.burstSources); //add a ground plane to show the horizon drawToScreen.Add(new Tutorial_22.DarkGroundPlane(new Vector4(0.125f, 0.15f, 0.135f, 1))); //add the sorted and unsorted lists drawToScreen.Add(drawSorted); drawToScreen.Add(drawUnsorted); //finally, create a CullTestVisualizer, which will visually show the cull tests performed cullTestVisualizer = new Xen.Ex.Scene.CullTestVisualizer(this.drawToScreen.Camera); //the visualizer is added as a draw modifier this.drawToScreen.AddModifier(cullTestVisualizer); //add help text this.text = new TextElement(); this.text.VerticalAlignment = VerticalAlignment.Bottom; this.text.Position = new Vector2(50, 100); drawToScreen.Add(this.text); //add draw stats stats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager); drawToScreen.Add(stats); }
protected override void Initialise() { //draw targets usually need a camera. var camera = new Xen.Camera.FirstPersonControlledCamera3D(this.UpdateManager, Vector3.Zero, false); //don't allow the camera to move too fast camera.MovementSensitivity *= 0.1f; camera.LookAt(new Vector3(0,3,0), new Vector3(1, 5, 10), new Vector3(0, 1, 0)); //create the draw target. drawToScreen = new DrawTargetScreen(camera); drawToScreen.ClearBuffer.ClearColour = new Color(45,50,60); //create the fire and smoke particle system this.fireParticleSystem = new ParticleSystem(this.UpdateManager); this.smokeParticleSystem = new ParticleSystem(this.UpdateManager); //IMPORTANT //The following flags are FALSE by default. //For looping effects, such as the fire and smoke, it's highly //recommended to enable this flag. Otherwise, while the effect //is offscreen, the particle system will continue to process. this.fireParticleSystem.PauseUpdatingWhileCulled = true; this.smokeParticleSystem.PauseUpdatingWhileCulled = true; this.drawSorted = new Xen.Ex.Scene.DepthDrawSorter(Xen.Ex.Scene.DepthSortMode.BackToFront); this.drawUnsorted = new DrawList(); var fireDrawer = new Xen.Ex.Graphics.Display.VelocityBillboardParticles3D(this.fireParticleSystem, true); var smokeDrawer = new Xen.Ex.Graphics.Display.BillboardParticles3D(this.smokeParticleSystem); for (int i = 0; i < 10; i++) { Vector3 position = new Vector3((float)Math.Cos(i * Math.PI / 5.0) * 6.0f, 0, (float)Math.Sin(i * Math.PI / 5.0) * 6.0f); CullableParticleWrapper fireEffect, smokeEffect; fireEffect = new CullableParticleWrapper(fireDrawer, position, new Vector3(0, 2, 0), 4); smokeEffect = new CullableParticleWrapper(smokeDrawer, position, new Vector3(0, 6, 0), 5); this.drawSorted.Add(fireEffect); this.drawSorted.Add(smokeEffect); this.drawUnsorted.Add(fireEffect); this.drawUnsorted.Add(smokeEffect); var light = new GroundLightDisk(position); this.drawSorted.Add(light); this.drawUnsorted.Add(light); } //setup the burst effect this.burstParticleSystem = new ParticleSystem(this.UpdateManager); //for this case, PauseUpdatingWhileCulled is not set to true. //The particle emitting is culled when offscreen. If set to true, //Any particles left offscreen could 'pause', when they naturally //wouldn't be emitted anyway. //(The particle system will use very few resources when it has no //active particles) this.burstSources = new BurstSource[20]; Random rand = new Random(); for (int i = 0; i < this.burstSources.Length; i++) { //create the bursts out in the distance Vector3 position = new Vector3((float)i * 5.0f - this.burstSources.Length * 2.5f, 0, -20); float radius = 10; // with a decent radius //give them a random starting time this.burstSources[i] = new BurstSource(position, radius, (float)rand.NextDouble() * 2); this.drawSorted.Add(this.burstSources[i]); this.drawUnsorted.Add(this.burstSources[i]); } //the bursts need to be drawn as a group.. var burstDrawer = new Xen.Ex.Graphics.Display.VelocityBillboardParticles3D(this.burstParticleSystem,false,0.5f); this.drawSorted.Add(burstDrawer); this.drawUnsorted.Add(burstDrawer); //Use all the burst sources to cull the drawer (may not be ideal if there were many sources...) //Use the particle drawer CullProxy to do it burstDrawer.CullProxy = new BurstCullProxy(this.burstSources); //add a ground plane to show the horizon drawToScreen.Add(new Tutorial_22.DarkGroundPlane(new Vector4(0.125f,0.15f,0.135f,1))); //add the sorted and unsorted lists drawToScreen.Add(drawSorted); drawToScreen.Add(drawUnsorted); //finally, create a CullTestVisualizer, which will visually show the cull tests performed cullTestVisualizer = new Xen.Ex.Scene.CullTestVisualizer(); //the visualizer is added as a draw modifier this.drawToScreen.AddModifier(cullTestVisualizer); //add help text this.text = new TextElement(); this.text.VerticalAlignment = VerticalAlignment.Bottom; this.text.Position = new Vector2(50, 100); drawToScreen.Add(this.text); //add draw stats stats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager); drawToScreen.Add(stats); }
protected override void Initialise() { //create the camera Xen.Camera.FirstPersonControlledCamera3D camera = new Xen.Camera.FirstPersonControlledCamera3D(this.UpdateManager,Vector3.Zero); camera.Projection.FarClip *= 10; this.camera = camera; //create the draw target. drawToScreen = new DrawTargetScreen(camera); //25,000 instances const int instanceCount = 25000; const float areaRadius = 500; //setup the two draw lists this.staticDrawList = new ToggleDrawList(); this.dynamicDrawList = new ToggleDrawList(); //geometry that will be drawn var geometry = new Xen.Ex.Geometry.Sphere(Vector3.One, 2, true, false, false); //create the mesh instance drawer, (but add it to the screen later) var meshDrawer = new DynamicInstancedMeshGeometry(instanceCount, geometry); var staticMeshDrawer = new StaticInstancedMeshGeometry(instanceCount, geometry); //the dynamicly culled instances are added to a StaticBinaryTreePartition, which //sorts the items into a binary tree, for more efficient culling. //This class assumes it's children do not move (ie they are static) var sceneTree = new Xen.Ex.Scene.StaticBinaryTreePartition(); //add it to the dynamic list dynamicDrawList.Children.Add(sceneTree); //create the instances Random random = new Random(); for (int i = 0; i < instanceCount; i++) { //create a random position in a sphere Vector3 position = new Vector3( (float)(random.NextDouble()-.5), (float)(random.NextDouble()-.5), (float)(random.NextDouble()-.5)); position.Normalize(); position *= (float)Math.Sqrt(random.NextDouble()) * areaRadius; //create the instance var instance = new DynamicMeshInstance(meshDrawer, position); //add the instance to the StaticBinaryTreePartition sceneTree.Add(instance); //add the details of this instance to the static drawer staticMeshDrawer.AddStaticInstance(Matrix.CreateTranslation(position), 1); } //now add the drawer (instances will be drawn by the StaticBinaryPartition, before the drawer) dynamicDrawList.Children.Add(meshDrawer); //now add the static mesh drawer staticDrawList.Children.Add(staticMeshDrawer); //finally, add them both to the screen this.drawToScreen.Add(dynamicDrawList); this.drawToScreen.Add(staticDrawList); //Note that if the StaticBinaryTreePartition was not used, then //in each frame, every single instance would perform a CullTest to the screen //CullTests, despite their simplicity can be very costly in large numbers. //The StaticBinaryTreePartition will usually perform a maximum number of CullTests //that is approximately ~30% the number of children. (in this case, ~8000 tests) //At it's best, when it's entirely off or on screen, it will perform only 1 or 2 CullTests. //The number of cull tests performed will be displayed in debug builds of this tutorial: //add some statusText to display on screen to show the stats statusText = new TextElement(); statusText.Position = new Vector2(50, -50); drawToScreen.Add(statusText); //add the cull test visualiser this.cullVis = new Xen.Ex.Scene.CullTestVisualizer(); drawToScreen.AddModifier(cullVis); }