protected override void CreateScene()
{
// set ambient light
scene.AmbientLight = new ColorEx(0.2f, 0.2f, 0.2f);
scene.SetSkyBox(true, "Skybox/Morning", 5000);
// create a default point light
Light light = scene.CreateLight("MainLight");
light.Type = LightType.Directional;
Vector3 dir = new Vector3(0.5f, -1, 0);
dir.Normalize();
light.Direction = dir;
light.Diffuse = new ColorEx(1.0f, 1.0f, 0.8f);
light.Specular = ColorEx.White;
// create a plane
plane = new MovablePlane("ReflectPlane");
plane.D = 0;
plane.Normal = Vector3.UnitY;
// create another plane to create the mesh. Ogre's MovablePlane uses multiple inheritance, bah!
Plane tmpPlane = new Plane();
tmpPlane.D = 0;
tmpPlane.Normal = Vector3.UnitY;
MeshManager.Instance.CreatePlane("ReflectionPlane", tmpPlane, 2000, 2000, 1, 1, true, 1, 1, 1, Vector3.UnitZ);
planeEntity = scene.CreateEntity("Plane", "ReflectionPlane");
// create an entity from a model
Entity knot = scene.CreateEntity("Knot", "knot.mesh");
knot.MaterialName = "TextureFX/Knot";
// create an entity from a model
Entity head = scene.CreateEntity("Head", "ogrehead.mesh");
// attach the render to texture entity to the root of the scene
SceneNode rootNode = scene.RootSceneNode;
planeNode = rootNode.CreateChildSceneNode();
planeNode.AttachObject(planeEntity);
planeNode.AttachObject(plane);
planeNode.Translate(new Vector3(0, -10, 0));
// tilt it a little to make it interesting
planeNode.Roll(5);
rootNode.CreateChildSceneNode("Head").AttachObject(head);
// create a render texture
RenderTexture rttTex = Root.Instance.RenderSystem.CreateRenderTexture("RttTex", 512, 512);
reflectCam = scene.CreateCamera("ReflectCam");
reflectCam.Near = camera.Near;
reflectCam.Far = camera.Far;
reflectCam.AspectRatio = (float)window.GetViewport(0).ActualWidth / (float)window.GetViewport(0).ActualHeight;
Viewport viewport = rttTex.AddViewport(reflectCam);
viewport.ClearEveryFrame = true;
viewport.OverlaysEnabled = false;
viewport.BackgroundColor = ColorEx.Black;
Material mat = scene.CreateMaterial("RttMat");
TextureUnitState t = mat.GetTechnique(0).GetPass(0).CreateTextureUnitState("RustedMetal.jpg");
t = mat.GetTechnique(0).GetPass(0).CreateTextureUnitState("RttTex");
// blend with base texture
t.SetColorOperationEx(LayerBlendOperationEx.BlendManual, LayerBlendSource.Texture, LayerBlendSource.Current,
ColorEx.White, ColorEx.White, 0.25f);
t.SetProjectiveTexturing(true, reflectCam);
// register events for viewport before/after update
rttTex.AfterUpdate += new RenderTargetUpdateEventHandler(rttTex_AfterUpdate);
rttTex.BeforeUpdate += new RenderTargetUpdateEventHandler(rttTex_BeforeUpdate);
// set up linked reflection
reflectCam.EnableReflection(plane);
// also clip
reflectCam.EnableCustomNearClipPlane(plane);
planeEntity.MaterialName = "RttMat";
Entity clone = null;
for (int i = 0; i < 10; i++)
{
// create a new node under the root
SceneNode node = scene.CreateSceneNode();
// calculate a random position
Vector3 nodePosition = new Vector3();
nodePosition.x = MathUtil.SymmetricRandom() * 750.0f;
nodePosition.y = MathUtil.SymmetricRandom() * 100.0f + 25;
nodePosition.z = MathUtil.SymmetricRandom() * 750.0f;
// set the new position
node.Position = nodePosition;
// attach this node to the root node
rootNode.AddChild(node);
// clone the knot
string cloneName = string.Format("Knot{0}", i);
clone = knot.Clone(cloneName);
// add the cloned knot to the scene
node.AttachObject(clone);
}
camera.Position = new Vector3(-50, 100, 500);
camera.LookAt(new Vector3(0, 0, 0));
}
/// <summary>
///
/// </summary>
/// <param name="meshName"></param>
private void PrepareEntity(string meshName)
{
if (objectEntity != null)
{
ClearEntity();
}
// load mesh if necessary
originalMesh = (Mesh)MeshManager.Instance.GetByName(meshName);
// load mesh with shadow buffer so we can do fast reads
if (originalMesh == null)
{
originalMesh = (Mesh)MeshManager.Instance.Load(
meshName,
BufferUsage.StaticWriteOnly,
BufferUsage.StaticWriteOnly,
true, true, 1);
if (originalMesh == null)
{
throw new Exception(string.Format("Can't find mesh named '{0}'.", meshName));
}
}
PrepareClonedMesh();
// create a new entity based on the cloned mesh
objectEntity = scene.CreateEntity(ENTITY_NAME, MESH_NAME);
// setting the material here propogates it down to cloned sub entites, no need to clone them
objectEntity.MaterialName = material.Name;
Pass pass = material.GetTechnique(0).GetPass(0);
// add original sub mesh texture layers after the new cube map recently added
for (int i = 0; i < clonedMesh.SubMeshCount; i++)
{
SubMesh subMesh = clonedMesh.GetSubMesh(i);
SubEntity subEntity = objectEntity.GetSubEntity(i);
// does this mesh have its own material set?
if (subMesh.IsMaterialInitialized)
{
string matName = subMesh.MaterialName;
Material subMat = MaterialManager.Instance.GetByName(matName);
if (subMat != null)
{
subMat.Load();
// Clone the sub entities material
Material cloned = subMat.Clone(string.Format("CubeMapTempMaterial#{0}", i));
Pass clonedPass = cloned.GetTechnique(0).GetPass(0);
// add global texture layers to the existing material of the entity
for (int j = 0; j < pass.NumTextureUnitStages; j++)
{
TextureUnitState orgLayer = pass.GetTextureUnitState(j);
TextureUnitState newLayer = clonedPass.CreateTextureUnitState(orgLayer.TextureName);
orgLayer.CopyTo(newLayer);
newLayer.SetColorOperationEx(currentLbx);
}
// set the new material for the subentity and cache it
subEntity.MaterialName = cloned.Name;
clonedMaterials.Add(cloned);
}
}
}
// attach the entity to the scene
objectNode.AttachObject(objectEntity);
// update noise if currently set to on
if (noiseOn)
{
UpdateNoise();
}
}
/// <summary>
/// Internal method for splitting the passes into illumination passes.
/// </summary>
public void CompileIlluminationPasses()
{
ClearIlluminationPasses();
// don't need to split transparent passes since they are rendered seperately
if (this.IsTransparent)
{
return;
}
// start off with ambient passes
IlluminationStage stage = IlluminationStage.Ambient;
bool hasAmbient = false;
for (int i = 0; i < passes.Count; /* increment in logic */)
{
Pass pass = (Pass)passes[i];
IlluminationPass iPass;
switch (stage)
{
case IlluminationStage.Ambient:
// keep looking for ambient only
if (pass.IsAmbientOnly)
{
iPass = new IlluminationPass();
iPass.OriginalPass = pass;
iPass.Pass = pass;
iPass.Stage = stage;
illuminationPasses.Add(iPass);
hasAmbient = true;
// progress to the next pass
i++;
}
else
{
// split off any ambient part
if (pass.Ambient.CompareTo(ColorEx.Black) != 0 ||
pass.Emissive.CompareTo(ColorEx.Black) != 0 ||
pass.AlphaRejectFunction != CompareFunction.AlwaysPass)
{
Pass newPass = new Pass(this, pass.Index);
pass.CopyTo(newPass);
if (newPass.AlphaRejectFunction != CompareFunction.AlwaysPass)
{
// Alpha rejection passes must retain their transparency, so
// we allow the texture units, but override the colour functions
for (int tindex = 0; tindex < newPass.NumTextureUnitStages; tindex++)
{
TextureUnitState tus = newPass.GetTextureUnitState(tindex);
tus.SetColorOperationEx(LayerBlendOperationEx.Source1, LayerBlendSource.Current, LayerBlendSource.Current);
}
}
else
{
// remove any texture units
newPass.RemoveAllTextureUnitStates();
}
// also remove any fragment program
if (newPass.HasFragmentProgram)
{
newPass.SetFragmentProgram("");
}
// We have to leave vertex program alone (if any) and
// just trust that the author is using light bindings, which
// we will ensure there are none in the ambient pass
newPass.Diffuse = new ColorEx(newPass.Diffuse.a, 0f, 0f, 0f); // Preserving alpha
newPass.Specular = ColorEx.Black;
// Calculate hash value for new pass, because we are compiling
// illumination passes on demand, which will loss hash calculate
// before it add to render queue first time.
newPass.RecalculateHash();
iPass = new IlluminationPass();
iPass.DestroyOnShutdown = true;
iPass.OriginalPass = pass;
iPass.Pass = newPass;
iPass.Stage = stage;
illuminationPasses.Add(iPass);
hasAmbient = true;
}
if (!hasAmbient)
{
// make up a new basic pass
Pass newPass = new Pass(this, pass.Index);
pass.CopyTo(newPass);
newPass.Ambient = ColorEx.Black;
newPass.Diffuse = ColorEx.Black;
// Calculate hash value for new pass, because we are compiling
// illumination passes on demand, which will loss hash calculate
// before it add to render queue first time.
newPass.RecalculateHash();
iPass = new IlluminationPass();
iPass.DestroyOnShutdown = true;
iPass.OriginalPass = pass;
iPass.Pass = newPass;
iPass.Stage = stage;
illuminationPasses.Add(iPass);
hasAmbient = true;
}
// this means we are done with ambients, progress to per-light
stage = IlluminationStage.PerLight;
}
break;
case IlluminationStage.PerLight:
if (pass.RunOncePerLight)
{
// if this is per-light already, use it directly
iPass = new IlluminationPass();
iPass.DestroyOnShutdown = false;
iPass.OriginalPass = pass;
iPass.Pass = pass;
iPass.Stage = stage;
illuminationPasses.Add(iPass);
// progress to the next pass
i++;
}
else
{
// split off per-light details (can only be done for one)
if (pass.LightingEnabled &&
(pass.Diffuse.CompareTo(ColorEx.Black) != 0 ||
pass.Specular.CompareTo(ColorEx.Black) != 0))
{
// copy existing pass
Pass newPass = new Pass(this, pass.Index);
pass.CopyTo(newPass);
if (newPass.AlphaRejectFunction != CompareFunction.AlwaysPass)
{
// Alpha rejection passes must retain their transparency, so
// we allow the texture units, but override the colour functions
for (int tindex = 0; tindex < newPass.NumTextureUnitStages; tindex++)
{
TextureUnitState tus = newPass.GetTextureUnitState(tindex);
tus.SetColorOperationEx(LayerBlendOperationEx.Source1, LayerBlendSource.Current, LayerBlendSource.Current);
}
}
else
{
// remove any texture units
newPass.RemoveAllTextureUnitStates();
}
// also remove any fragment program
if (newPass.HasFragmentProgram)
{
newPass.SetFragmentProgram("");
}
// Cannot remove vertex program, have to assume that
// it will process diffuse lights, ambient will be turned off
newPass.Ambient = ColorEx.Black;
newPass.Emissive = ColorEx.Black;
// must be additive
newPass.SetSceneBlending(SceneBlendFactor.One, SceneBlendFactor.One);
iPass = new IlluminationPass();
iPass.DestroyOnShutdown = true;
iPass.OriginalPass = pass;
iPass.Pass = newPass;
iPass.Stage = stage;
illuminationPasses.Add(iPass);
}
// This means the end of per-light passes
stage = IlluminationStage.Decal;
}
break;
case IlluminationStage.Decal:
// We just want a 'lighting off' pass to finish off
// and only if there are texture units
if (pass.NumTextureUnitStages > 0)
{
if (!pass.LightingEnabled)
{
// we assume this pass already combines as required with the scene
iPass = new IlluminationPass();
iPass.DestroyOnShutdown = false;
iPass.OriginalPass = pass;
iPass.Pass = pass;
iPass.Stage = stage;
illuminationPasses.Add(iPass);
}
else
{
// Copy the pass and tweak away the lighting parts
Pass newPass = new Pass(this, pass.Index);
pass.CopyTo(newPass);
newPass.Ambient = ColorEx.Black;
newPass.Diffuse = new ColorEx(newPass.Diffuse.a, 0f, 0f, 0f); // Preserving alpha
newPass.Specular = ColorEx.Black;
newPass.Emissive = ColorEx.Black;
newPass.LightingEnabled = false;
// modulate
newPass.SetSceneBlending(SceneBlendFactor.DestColor, SceneBlendFactor.Zero);
// Calculate hash value for new pass, because we are compiling
// illumination passes on demand, which will loss hash calculate
// before it add to render queue first time.
newPass.RecalculateHash();
// there is nothing we can do about vertex & fragment
// programs here, so people will just have to make their
// programs friendly-like if they want to use this technique
iPass = new IlluminationPass();
iPass.DestroyOnShutdown = true;
iPass.OriginalPass = pass;
iPass.Pass = newPass;
iPass.Stage = stage;
illuminationPasses.Add(iPass);
}
}
// always increment on decal, since nothing more to do with this pass
i++;
break;
}
}
}
