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@@ -3,6 +3,7 @@
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// - Creating a scene with 250 x 250 simple objects;
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// - Competing with http://yosoygames.com.ar/wp/2013/07/ogre-2-0-is-up-to-3x-faster/ :)
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// - Allowing examination of performance hotspots in the rendering code;
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+// - Optionally speeding up rendering by grouping the objects using StaticModelGroup component;
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#include "Scripts/Utilities/Sample.as"
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@@ -12,6 +13,7 @@ Array<Node@> boxNodes;
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float yaw = 0.0f;
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float pitch = 0.0f;
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bool animate = false;
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+bool useGroups = false;
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void Start()
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{
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@@ -33,7 +35,13 @@ void Start()
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void CreateScene()
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{
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- scene_ = Scene();
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+ if (scene_ is null)
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+ scene_ = Scene();
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+ else
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+ {
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+ scene_.Clear();
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+ boxNodes.Clear();
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+ }
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// Create the Octree component to the scene so that drawable objects can be rendered. Use default volume
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// (-1000, -1000, -1000) to (1000, 1000, 1000)
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@@ -46,49 +54,87 @@ void CreateScene()
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zone.fogColor = Color(0.2f, 0.2f, 0.2f);
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zone.fogStart = 200.0f;
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zone.fogEnd = 300.0f;
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-
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+
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// Create a directional light
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Node@ lightNode = scene_.CreateChild("DirectionalLight");
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- lightNode.direction = Vector3(0.5f, -1.0f, 0.5f); // The direction vector does not need to be normalized
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+ lightNode.direction = Vector3(-0.6f, -1.0f, -0.8f); // The direction vector does not need to be normalized
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Light@ light = lightNode.CreateComponent("Light");
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light.lightType = LIGHT_DIRECTIONAL;
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- light.color = Color(0.7f, 0.35f, 0.0f);
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- // Create box StaticModels in the scene
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- for (int y = -125; y < 125; ++y)
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+ if (!useGroups)
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+ {
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+ light.color = Color(0.7f, 0.35f, 0.0f);
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+
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+ // Create individual box StaticModels in the scene
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+ for (int y = -125; y < 125; ++y)
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+ {
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+ for (int x = -125; x < 125; ++x)
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+ {
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+ Node@ boxNode = scene_.CreateChild("Box");
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+ boxNode.position = Vector3(x * 0.3f, 0.0f, y * 0.3f);
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+ boxNode.SetScale(0.25f);
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+ StaticModel@ boxObject = boxNode.CreateComponent("StaticModel");
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+ boxObject.model = cache.GetResource("Model", "Models/Box.mdl");
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+ boxNodes.Push(boxNode);
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+ }
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+ }
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+ }
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+ else
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{
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- for (int x = -125; x < 125; ++x)
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+ light.color = Color(0.6f, 0.6f, 0.6f);
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+ light.specularIntensity = 1.5f;
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+
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+ // Create StaticModelGroups in the scene
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+ StaticModelGroup@ lastGroup;
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+
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+ for (int y = -125; y < 125; ++y)
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{
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- Node@ boxNode = scene_.CreateChild("Box");
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- boxNode.position = Vector3(x * 0.3f, 0.0f, y * 0.3f);
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- boxNode.SetScale(0.25f);
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- StaticModel@ boxObject = boxNode.CreateComponent("StaticModel");
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- boxObject.model = cache.GetResource("Model", "Models/Box.mdl");
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- boxNodes.Push(boxNode);
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+ for (int x = -125; x < 125; ++x)
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+ {
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+ // Create new group if no group yet, or the group has already "enough" objects. The tradeoff is between culling
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+ // accuracy and the amount of CPU processing needed for all the objects. Note that the group's own transform
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+ // does not matter, and it does not render anything if instance nodes are not added to it
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+ if (lastGroup is null || lastGroup.numInstanceNodes >= 25 * 25)
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+ {
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+ Node@ boxGroupNode = scene_.CreateChild("BoxGroup");
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+ lastGroup = boxGroupNode.CreateComponent("StaticModelGroup");
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+ lastGroup.model = cache.GetResource("Model", "Models/Box.mdl");
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+ }
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+
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+ Node@ boxNode = scene_.CreateChild("Box");
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+ boxNode.position = Vector3(x * 0.3f, 0.0f, y * 0.3f);
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+ boxNode.SetScale(0.25f);
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+ boxNodes.Push(boxNode);
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+ lastGroup.AddInstanceNode(boxNode);
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+ }
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}
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}
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- // Create the camera
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- cameraNode = scene_.CreateChild("Camera");
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- cameraNode.position = Vector3(0.0f, 10.0f, -100.0f);
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- Camera@ camera = cameraNode.CreateComponent("Camera");
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- camera.farClip = 300.0f;
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+ // Create the camera. Create it outside the scene so that we can clear the whole scene without affecting it
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+ if (cameraNode is null)
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+ {
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+ cameraNode = Node("Camera");
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+ cameraNode.position = Vector3(0.0f, 10.0f, -100.0f);
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+ Camera@ camera = cameraNode.CreateComponent("Camera");
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+ camera.farClip = 300.0f;
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+ }
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}
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void CreateInstructions()
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{
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// Construct new Text object, set string to display and font to use
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Text@ instructionText = ui.root.CreateChild("Text");
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- instructionText.text =
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+ instructionText.text =
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"Use WASD keys and mouse to move\n"
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- "Space to toggle animation";
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+ "Space to toggle animation\n"
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+ "G to toggle object group optimization";
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instructionText.SetFont(cache.GetResource("Font", "Fonts/Anonymous Pro.ttf"), 15);
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// The text has multiple rows. Center them in relation to each other
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instructionText.textAlignment = HA_CENTER;
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-
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+
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// Position the text relative to the screen center
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instructionText.horizontalAlignment = HA_CENTER;
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- instructionText.verticalAlignment= VA_CENTER;
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+ instructionText.verticalAlignment = VA_CENTER;
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instructionText.SetPosition(0, ui.root.height / 4);
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}
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@@ -155,6 +201,13 @@ void HandleUpdate(StringHash eventType, VariantMap& eventData)
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if (input.keyPress[KEY_SPACE])
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animate = !animate;
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+ // Toggle grouped / ungrouped mode
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+ if (input.keyPress['G'])
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+ {
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+ useGroups = !useGroups;
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+ CreateScene();
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+ }
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+
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// Move the camera, scale movement with time step
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MoveCamera(timeStep);
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Lasse Öörni