internal override IEnumerable <SceneObjectBatch> GetGeometries(GraphicsContext ctx, SceneGraphContext ctxScene)
{
if ((ctxScene.Scene.SceneFlags & SceneGraphFlags.BoundingVolumes) != 0)
{
GraphicsStateSet boundingVolumeState = ctxScene.GraphicsStateStack.Current.Push();
// Transform
TransformStateBase boundingVolumeModel = (TransformStateBase)boundingVolumeState[TransformStateBase.StateSetIndex];
float lightVolumeDepth = 100.0f;
float lightVolumeSize = lightVolumeDepth * (float)Math.Tan(Angle.ToRadians(FalloffAngle));
boundingVolumeModel.LocalModelViewProjection.Set(boundingVolumeModel.LocalModelViewProjection.Multiply(LightMatrix));
boundingVolumeModel.LocalModelViewProjection.Translate(0.0f, 0.0f, lightVolumeDepth);
boundingVolumeModel.LocalModelViewProjection.Scale(lightVolumeSize, lightVolumeSize, lightVolumeDepth);
// Uniform color
ShaderUniformState uniformState = new ShaderUniformState("UniformState");
uniformState.SetUniformState("glo_UniformColor", new ColorRGBAF(1.0f, 1.0f, 0.0f, 0.5f));
boundingVolumeState.DefineState(uniformState);
// Alpha blending
boundingVolumeState.DefineState(BlendState.AlphaBlending);
yield return(new SceneObjectBatch(
_BoundingVolumeArrays,
boundingVolumeState,
_BoundingVolumeProgram
));
}
yield break;
}
private SceneObject CreateSkyBoxObject()
{
if (!Gl.CurrentExtensions.TextureCubeMap_ARB)
{
return(null);
}
SceneObjectGeometry skyboxObject = new SceneObjectGeometry();
#region Texture
OpenGL.Objects.Image[] cubeMap = new OpenGL.Objects.Image[6];
using (Stream imageStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("HelloObjects.Data.PiazzaDelPopolo.posx.jpg"))
cubeMap[0] = ImageCodec.Instance.Load(imageStream, ImageFormat.Jpeg);
using (Stream imageStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("HelloObjects.Data.PiazzaDelPopolo.negx.jpg"))
cubeMap[1] = ImageCodec.Instance.Load(imageStream, ImageFormat.Jpeg);
using (Stream imageStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("HelloObjects.Data.PiazzaDelPopolo.posy.jpg"))
cubeMap[2] = ImageCodec.Instance.Load(imageStream, ImageFormat.Jpeg);
using (Stream imageStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("HelloObjects.Data.PiazzaDelPopolo.negy.jpg"))
cubeMap[3] = ImageCodec.Instance.Load(imageStream, ImageFormat.Jpeg);
using (Stream imageStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("HelloObjects.Data.PiazzaDelPopolo.posz.jpg"))
cubeMap[4] = ImageCodec.Instance.Load(imageStream, ImageFormat.Jpeg);
using (Stream imageStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("HelloObjects.Data.PiazzaDelPopolo.negz.jpg"))
cubeMap[5] = ImageCodec.Instance.Load(imageStream, ImageFormat.Jpeg);
foreach (OpenGL.Objects.Image image in cubeMap)
{
image.FlipVertically();
}
TextureCube cubeMapTexture = new TextureCube();
cubeMapTexture.Create(PixelLayout.RGB24, cubeMap);
#endregion
#region State
skyboxObject.LocalModel.Scale(170.0f);
skyboxObject.ObjectState.DefineState(new DepthTestState(DepthFunction.Less));
skyboxObject.ObjectState.DefineState(new CullFaceState(FrontFaceDirection.Cw, CullFaceMode.Back));
ShaderUniformState skyboxUniformState = new ShaderUniformState("OpenGL.Skybox");
skyboxUniformState.SetUniformState("glo_CubeMapTexture", cubeMapTexture);
skyboxObject.ObjectState.DefineState(skyboxUniformState);
#endregion
#region Program
skyboxObject.ProgramTag = ShadersLibrary.Instance.CreateProgramTag("OpenGL.Skybox");
skyboxObject.Program.Create(_Context);
#endregion
#region Vertex Array
// Define vertex arrays
skyboxObject.VertexArray = new VertexArrayObject();
skyboxObject.VertexArray.SetArray(_CubeArrayPosition, VertexArraySemantic.Position);
skyboxObject.VertexArray.SetElementArray(PrimitiveType.Triangles);
skyboxObject.VertexArray.Create(_Context);
#endregion
return(skyboxObject);
}
