public RayCastedGlobe(Context context)
{
Verify.ThrowIfNull(context);
_renderState = new RenderState();
_renderState.FacetCulling.Face = CullFace.Front;
string vs = EmbeddedResources.GetText("OpenGlobe.Scene.Globes.RayCasted.Shaders.GlobeVS.glsl");
ShaderProgram sp = Device.CreateShaderProgram(vs, EmbeddedResources.GetText("OpenGlobe.Scene.Globes.RayCasted.Shaders.GlobeFS.glsl"));
_cameraEyeSquared = (Uniform <Vector3F>)sp.Uniforms["u_cameraEyeSquared"];
_useAverageDepth = (Uniform <bool>)sp.Uniforms["u_useAverageDepth"];
ShaderProgram solidSP = Device.CreateShaderProgram(vs, EmbeddedResources.GetText("OpenGlobe.Scene.Globes.RayCasted.Shaders.SolidShadedGlobeFS.glsl"));
_cameraEyeSquaredSolid = (Uniform <Vector3F>)solidSP.Uniforms["u_cameraEyeSquared"];
_useAverageDepthSolid = (Uniform <bool>)solidSP.Uniforms["u_useAverageDepth"];
_drawState = new DrawState(_renderState, sp, null);
_drawStateSolid = new DrawState(_renderState, solidSP, null);
Shape = Ellipsoid.ScaledWgs84;
Shade = true;
ShowGlobe = true;
}
public BillboardCollection(Context context, int capacity)
{
Verify.ThrowIfNull(context);
if (capacity < 0)
{
throw new ArgumentOutOfRangeException("capacity");
}
///////////////////////////////////////////////////////////////////
_billboards = new List <Billboard>(capacity);
_dirtyBillboards = new List <Billboard>();
///////////////////////////////////////////////////////////////////
RenderState renderState = new RenderState();
renderState.FacetCulling.Enabled = false;
renderState.Blending.Enabled = true;
renderState.Blending.SourceRGBFactor = SourceBlendingFactor.SourceAlpha;
renderState.Blending.SourceAlphaFactor = SourceBlendingFactor.SourceAlpha;
renderState.Blending.DestinationRGBFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
renderState.Blending.DestinationAlphaFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.BillboardCollection.Shaders.BillboardsVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.BillboardCollection.Shaders.BillboardsGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.BillboardCollection.Shaders.BillboardsFS.glsl"));
_drawState = new DrawState(renderState, sp, null);
Show = true;
}
public void Set(Context context, Mesh mesh)
{
Verify.ThrowIfNull(context);
if (mesh == null)
{
throw new ArgumentNullException("mesh");
}
if (mesh.PrimitiveType != PrimitiveType.Lines &&
mesh.PrimitiveType != PrimitiveType.LineLoop &&
mesh.PrimitiveType != PrimitiveType.LineStrip)
{
throw new ArgumentException("mesh.PrimitiveType must be Lines, LineLoop, or LineStrip.", "mesh");
}
if (!mesh.Attributes.Contains("position") &&
!mesh.Attributes.Contains("color"))
{
throw new ArgumentException("mesh.Attributes should contain attributes named \"position\" and \"color\".", "mesh");
}
if (_drawState.ShaderProgram == null)
{
_drawState.ShaderProgram = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Polyline.Polyline.PolylineVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Polyline.Polyline.PolylineGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Polyline.Polyline.PolylineFS.glsl"));
_fillDistance = (Uniform <float>)_drawState.ShaderProgram.Uniforms["u_fillDistance"];
}
///////////////////////////////////////////////////////////////////
_drawState.VertexArray = context.CreateVertexArray(mesh, _drawState.ShaderProgram.VertexAttributes, BufferHint.StaticDraw);
_primitiveType = mesh.PrimitiveType;
}
public HeadsUpDisplay()
{
RenderState renderState = new RenderState();
renderState.FacetCulling.Enabled = false;
renderState.DepthTest.Enabled = false;
renderState.Blending.Enabled = true;
renderState.Blending.SourceRGBFactor = SourceBlendingFactor.SourceAlpha;
renderState.Blending.SourceAlphaFactor = SourceBlendingFactor.SourceAlpha;
renderState.Blending.DestinationRGBFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
renderState.Blending.DestinationAlphaFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.HeadsUpDisplay.Shaders.HeadsUpDisplayVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.HeadsUpDisplay.Shaders.HeadsUpDisplayGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.HeadsUpDisplay.Shaders.HeadsUpDisplayFS.glsl"));
_colorUniform = (Uniform <Vector3F>)sp.Uniforms["u_color"];
_originScaleUniform = (Uniform <Vector2F>)sp.Uniforms["u_originScale"];
_drawState = new DrawState(renderState, sp, null);
Color = Color.White;
HorizontalOrigin = HorizontalOrigin.Left;
VerticalOrigin = VerticalOrigin.Bottom;
_positionDirty = true;
}
public ClipmapUpdater(Context context, ClipmapLevel[] clipmapLevels)
{
ShaderVertexAttributeCollection vertexAttributes = new ShaderVertexAttributeCollection();
vertexAttributes.Add(new ShaderVertexAttribute("position", VertexLocations.Position, ShaderVertexAttributeType.FloatVector2, 1));
Mesh unitQuad = RectangleTessellator.Compute(new RectangleD(new Vector2D(0.0, 0.0), new Vector2D(1.0, 1.0)), 1, 1);
_unitQuad = context.CreateVertexArray(unitQuad, vertexAttributes, BufferHint.StaticDraw);
_unitQuadPrimitiveType = unitQuad.PrimitiveType;
_sceneState = new SceneState();
_framebuffer = context.CreateFramebuffer();
_updateShader = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.ClipmapTerrain.ClipmapUpdateVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.ClipmapTerrain.ClipmapUpdateFS.glsl"));
_updateTexelOutput = _updateShader.FragmentOutputs["texelOutput"];
_updateDrawState = new DrawState(new RenderState(), _updateShader, _unitQuad);
_updateDrawState.RenderState.FacetCulling.FrontFaceWindingOrder = unitQuad.FrontFaceWindingOrder;
_updateDrawState.RenderState.DepthTest.Enabled = false;
_updateDestinationOffset = (Uniform <Vector2F>)_updateShader.Uniforms["u_destinationOffset"];
_updateUpdateSize = (Uniform <Vector2F>)_updateShader.Uniforms["u_updateSize"];
_updateSourceOrigin = (Uniform <Vector2F>)_updateShader.Uniforms["u_sourceOrigin"];
_upsampleShader = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.ClipmapTerrain.ClipmapUpsampleVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.ClipmapTerrain.ClipmapUpsampleFS.glsl"));
_upsampleTexelOutput = _upsampleShader.FragmentOutputs["texelOutput"];
_upsampleDrawState = new DrawState(new RenderState(), _upsampleShader, _unitQuad);
_upsampleDrawState.RenderState.FacetCulling.FrontFaceWindingOrder = unitQuad.FrontFaceWindingOrder;
_upsampleDrawState.RenderState.DepthTest.Enabled = false;
_upsampleSourceOrigin = (Uniform <Vector2F>)_upsampleShader.Uniforms["u_sourceOrigin"];
_upsampleUpdateSize = (Uniform <Vector2F>)_upsampleShader.Uniforms["u_updateSize"];
_upsampleDestinationOffset = (Uniform <Vector2F>)_upsampleShader.Uniforms["u_destinationOffset"];
_upsampleOneOverTextureSize = (Uniform <Vector2F>)_upsampleShader.Uniforms["u_oneOverTextureSize"];
_computeNormalsShader = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.ClipmapTerrain.ClipmapComputeNormalsVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.ClipmapTerrain.ClipmapComputeNormalsFS.glsl"));
_normalOutput = _computeNormalsShader.FragmentOutputs["normalOutput"];
_computeNormalsDrawState = new DrawState(new RenderState(), _computeNormalsShader, _unitQuad);
_computeNormalsDrawState.RenderState.FacetCulling.FrontFaceWindingOrder = unitQuad.FrontFaceWindingOrder;
_computeNormalsDrawState.RenderState.DepthTest.Enabled = false;
_computeNormalsOrigin = (Uniform <Vector2F>)_computeNormalsShader.Uniforms["u_origin"];
_computeNormalsUpdateSize = (Uniform <Vector2F>)_computeNormalsShader.Uniforms["u_updateSize"];
_computeNormalsOneOverHeightMapSize = (Uniform <Vector2F>)_computeNormalsShader.Uniforms["u_oneOverHeightMapSize"];
_heightExaggeration = (Uniform <float>)_computeNormalsShader.Uniforms["u_heightExaggeration"];
_postDelta = (Uniform <float>)_computeNormalsShader.Uniforms["u_postDelta"];
HeightExaggeration = 1.0f;
ClipmapLevel levelZero = clipmapLevels[0];
InitializeRequestThreads(context, _terrain, levelZero, levelZero.Terrain);
InitializeRequestThreads(context, _imagery, levelZero, levelZero.Imagery);
}
public PolylineOnTerrain()
{
_wallSP = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.PolylineOnTerrain.Shaders.PolylineOnTerrainWallVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.PolylineOnTerrain.Shaders.PolylineOnTerrainWallGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.PolylineOnTerrain.Shaders.PolylineOnTerrainWallFS.glsl"));
_shadowVolumeSP = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.PolylineOnTerrain.Shaders.PolylineOnTerrainShadowVolumeVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.PolylineOnTerrain.Shaders.PolylineOnTerrainShadowVolumeGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.PolylineOnTerrain.Shaders.PolylineOnTerrainShadowVolumeFS.glsl"));
}
public LatitudeLongitudeGridGlobe(Context context)
{
Verify.ThrowIfNull(context);
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Globes.LatitudeLongitudeGrid.Shaders.GlobeVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Globes.LatitudeLongitudeGrid.Shaders.GlobeFS.glsl"));
_gridWidth = (Uniform <Vector2F>)sp.Uniforms["u_gridLineWidth"];
_gridResolution = (Uniform <Vector2F>)sp.Uniforms["u_gridResolution"];
_globeOneOverRadiiSquared = (Uniform <Vector3F>)sp.Uniforms["u_globeOneOverRadiiSquared"];
_drawState = new DrawState();
_drawState.ShaderProgram = sp;
Shape = Ellipsoid.ScaledWgs84;
}
public DoubleViewportQuad(Context context)
{
Verify.ThrowIfNull(context);
RenderState renderState = new RenderState();
renderState.FacetCulling.Enabled = false;
renderState.DepthTest.Enabled = false;
_drawState = new DrawState();
_drawState.RenderState = renderState;
_drawState.ShaderProgram = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.ViewportQuad.Shaders.DoubleViewportQuadVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.ViewportQuad.Shaders.DoubleViewportQuadFS.glsl"));
_geometry = new DoubleViewportQuadGeometry();
}
public TessellatedGlobe()
{
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Globes.Tessellated.Shaders.GlobeVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Globes.Tessellated.Shaders.GlobeFS.glsl"));
_textured = (Uniform <bool>)sp.Uniforms["u_Textured"];
_logarithmicDepth = (Uniform <bool>)sp.Uniforms["u_logarithmicDepth"];
_logarithmicDepthConstant = (Uniform <float>)sp.Uniforms["u_logarithmicDepthConstant"];
LogarithmicDepthConstant = 1;
_drawState = new DrawState();
_drawState.ShaderProgram = sp;
Shape = Ellipsoid.ScaledWgs84;
NumberOfSlicePartitions = 32;
NumberOfStackPartitions = 16;
}
public RayCastedTerrainTile(TerrainTile tile)
{
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.RayCastedTerrainTile.TerrainVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.RayCastedTerrainTile.TerrainFS.glsl"));
_tileResolution = tile.Resolution;
_tileMinimumHeight = tile.MinimumHeight;
_tileMaximumHeight = tile.MaximumHeight;
_tileAABBLowerLeft = Vector3D.Zero; // TEXEL_SPACE_TODO
_tileAABBUpperRight = new Vector3D(tile.Resolution.X, tile.Resolution.Y,
tile.MaximumHeight - tile.MinimumHeight);
_heightExaggeration = (Uniform <float>)sp.Uniforms["u_heightExaggeration"];
_minimumHeight = (Uniform <float>)sp.Uniforms["u_minimumHeight"];
_maximumHeight = (Uniform <float>)sp.Uniforms["u_maximumHeight"];
_aabbLowerLeft = (Uniform <Vector3F>)sp.Uniforms["u_aabbLowerLeft"];
_aabbUpperRight = (Uniform <Vector3F>)sp.Uniforms["u_aabbUpperRight"];
_shadingAlgorithm = (Uniform <int>)sp.Uniforms["u_shadingAlgorithm"];
HeightExaggeration = 1;
///////////////////////////////////////////////////////////////////
_drawState = new DrawState();
_drawState.RenderState.FacetCulling.Face = CullFace.Front;
_drawState.ShaderProgram = sp;
//
// Upload height map as a one channel floating point texture
//
WritePixelBuffer pixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream,
sizeof(float) * tile.Heights.Length);
pixelBuffer.CopyFromSystemMemory(tile.Heights);
_texture = Device.CreateTexture2DRectangle(new Texture2DDescription(
tile.Resolution.X, tile.Resolution.Y, TextureFormat.Red32f));
_texture.CopyFromBuffer(pixelBuffer, ImageFormat.Red, ImageDatatype.Float);
ShowTerrain = true;
}
public Wireframe(Context context, Mesh mesh)
{
RenderState renderState = new RenderState();
renderState.Blending.Enabled = true;
renderState.Blending.SourceRGBFactor = SourceBlendingFactor.SourceAlpha;
renderState.Blending.SourceAlphaFactor = SourceBlendingFactor.SourceAlpha;
renderState.Blending.DestinationRGBFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
renderState.Blending.DestinationAlphaFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
renderState.FacetCulling.FrontFaceWindingOrder = mesh.FrontFaceWindingOrder;
renderState.DepthTest.Function = DepthTestFunction.LessThanOrEqual;
//
// This implementation is based on the 2006 SIGGRAPH Sketch:
//
// Single-pass Wireframe Rendering
// http://www2.imm.dtu.dk/pubdb/views/edoc_download.php/4884/pdf/imm4884.pdf
//
// NVIDIA published a white paper with some enhancements we can consider:
//
// Solid Wireframe
// http://developer.download.nvidia.com/SDK/10.5/direct3d/Source/SolidWireframe/Doc/SolidWireframe.pdf
//
// More recent work, which I was not aware of at the time, is:
//
// Two Methods for Antialiased Wireframe Drawing with Hidden Line Removal
// http://orbit.dtu.dk/getResource?recordId=219956&objectId=1&versionId=1
//
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Wireframe.Shaders.WireframeVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Wireframe.Shaders.WireframeGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Wireframe.Shaders.WireframeFS.glsl"));
_lineWidth = (Uniform <float>)sp.Uniforms["u_halfLineWidth"];
Width = 1;
_colorUniform = (Uniform <Vector3F>)sp.Uniforms["u_color"];
Color = Color.Black;
_drawState = new DrawState(renderState, sp, context.CreateVertexArray(mesh, sp.VertexAttributes, BufferHint.StaticDraw));
_primitiveType = mesh.PrimitiveType;
}
public DayNightViewportQuad(Context context)
{
Verify.ThrowIfNull(context);
RenderState renderState = new RenderState();
renderState.FacetCulling.Enabled = false;
renderState.DepthTest.Enabled = false;
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Globes.DayNight.Shaders.ViewportQuadVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Globes.DayNight.Shaders.ViewportQuadFS.glsl"));
_dayNightOutput = (Uniform <int>)sp.Uniforms["u_DayNightOutput"];
_drawState = new DrawState();
_drawState.RenderState = renderState;
_drawState.ShaderProgram = sp;
_geometry = new ViewportQuadGeometry();
}
public DayNightGlobe(Context context)
{
Verify.ThrowIfNull(context);
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Globes.DayNight.Shaders.GlobeVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Globes.DayNight.Shaders.GlobeFS.glsl"));
_cameraEyeSquaredSP = (Uniform <Vector3F>)sp.Uniforms["u_cameraEyeSquared"];
_useAverageDepth = (Uniform <bool>)sp.Uniforms["u_useAverageDepth"];
float blendDurationScale = 0.1f;
((Uniform <float>)sp.Uniforms["u_blendDuration"]).Value = blendDurationScale;
((Uniform <float>)sp.Uniforms["u_blendDurationScale"]).Value = 1 / (2 * blendDurationScale);
_drawState = new DrawState();
_drawState.ShaderProgram = sp;
Shape = Ellipsoid.ScaledWgs84;
ShowGlobe = true;
}
public Plane(Context context)
{
Verify.ThrowIfNull(context);
RenderState lineRS = new RenderState();
lineRS.FacetCulling.Enabled = false;
ShaderProgram lineSP = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Plane.Shaders.LineVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Plane.Shaders.LineGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Plane.Shaders.LineFS.glsl"));
_lineLogarithmicDepth = (Uniform <bool>)lineSP.Uniforms["u_logarithmicDepth"];
_lineLogarithmicDepthConstant = (Uniform <float>)lineSP.Uniforms["u_logarithmicDepthConstant"];
_lineFillDistance = (Uniform <float>)lineSP.Uniforms["u_fillDistance"];
_lineColorUniform = (Uniform <Vector3F>)lineSP.Uniforms["u_color"];
OutlineWidth = 1;
OutlineColor = Color.Gray;
///////////////////////////////////////////////////////////////////
RenderState fillRS = new RenderState();
fillRS.FacetCulling.Enabled = false;
fillRS.Blending.Enabled = true;
fillRS.Blending.SourceRGBFactor = SourceBlendingFactor.SourceAlpha;
fillRS.Blending.SourceAlphaFactor = SourceBlendingFactor.SourceAlpha;
fillRS.Blending.DestinationRGBFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
fillRS.Blending.DestinationAlphaFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
ShaderProgram fillSP = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Plane.Shaders.FillVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Plane.Shaders.FillFS.glsl"));
_fillLogarithmicDepth = (Uniform <bool>)fillSP.Uniforms["u_logarithmicDepth"];
_fillLogarithmicDepthConstant = (Uniform <float>)fillSP.Uniforms["u_logarithmicDepthConstant"];
_fillColorUniform = (Uniform <Vector3F>)fillSP.Uniforms["u_color"];
_fillAlphaUniform = (Uniform <float>)fillSP.Uniforms["u_alpha"];
LogarithmicDepthConstant = 1;
FillColor = Color.Gray;
FillTranslucency = 0.5f;
///////////////////////////////////////////////////////////////////
_positionBuffer = Device.CreateVertexBuffer(BufferHint.StaticDraw, 2 * 4 * SizeInBytes <Vector3F> .Value);
ushort[] indices = new ushort[]
{
0, 1, 2, 3, // Line loop
0, 1, 2, 0, 2, 3 // Triangles
};
IndexBuffer indexBuffer = Device.CreateIndexBuffer(BufferHint.StaticDraw, indices.Length * sizeof(ushort));
indexBuffer.CopyFromSystemMemory(indices);
int stride = 2 * SizeInBytes <Vector3F> .Value;
_va = context.CreateVertexArray();
_va.Attributes[VertexLocations.PositionHigh] =
new VertexBufferAttribute(_positionBuffer, ComponentDatatype.Float, 3, false, 0, stride);
_va.Attributes[VertexLocations.PositionLow] =
new VertexBufferAttribute(_positionBuffer, ComponentDatatype.Float, 3, false, SizeInBytes <Vector3F> .Value, stride);
_va.IndexBuffer = indexBuffer;
Show = true;
ShowOutline = true;
ShowFill = true;
///////////////////////////////////////////////////////////////////
_drawStateLine = new DrawState(lineRS, lineSP, _va);
_drawStateFill = new DrawState(fillRS, fillSP, _va);
Origin = Vector3D.Zero;
XAxis = Vector3D.UnitX;
YAxis = Vector3D.UnitY;
}
public GlobeClipmapTerrain(Context context, RasterSource terrainSource, EsriRestImagery imagery, Ellipsoid ellipsoid, int clipmapPosts)
{
_terrainSource = terrainSource;
_ellipsoid = ellipsoid;
_clipmapPosts = clipmapPosts;
_clipmapSegments = _clipmapPosts - 1;
int clipmapLevels = _terrainSource.Levels.Count;
_clipmapLevels = new ClipmapLevel[clipmapLevels];
for (int i = 0; i < _clipmapLevels.Length; ++i)
{
_clipmapLevels[i] = new ClipmapLevel();
}
for (int i = 0; i < _clipmapLevels.Length; ++i)
{
RasterLevel terrainLevel = _terrainSource.Levels[i];
_clipmapLevels[i].Terrain = terrainLevel;
_clipmapLevels[i].HeightTexture = Device.CreateTexture2D(new Texture2DDescription(_clipmapPosts, _clipmapPosts, TextureFormat.Red32f));
_clipmapLevels[i].NormalTexture = Device.CreateTexture2D(new Texture2DDescription(_clipmapPosts, _clipmapPosts, TextureFormat.RedGreenBlue32f));
_clipmapLevels[i].CoarserLevel = i == 0 ? null : _clipmapLevels[i - 1];
_clipmapLevels[i].FinerLevel = i == _clipmapLevels.Length - 1 ? null : _clipmapLevels[i + 1];
// Aim for roughly one imagery texel per geometry texel.
// Find the first imagery level that meets our resolution needs.
double longitudeResRequired = terrainLevel.PostDeltaLongitude;
double latitudeResRequired = terrainLevel.PostDeltaLatitude;
RasterLevel imageryLevel = null;
for (int j = 0; j < imagery.Levels.Count; ++j)
{
imageryLevel = imagery.Levels[j];
if (imageryLevel.PostDeltaLongitude <= longitudeResRequired &&
imageryLevel.PostDeltaLatitude <= latitudeResRequired)
{
break;
}
}
_clipmapLevels[i].Imagery = imageryLevel;
_clipmapLevels[i].ImageryWidth = (int)Math.Ceiling(_clipmapPosts * terrainLevel.PostDeltaLongitude / imageryLevel.PostDeltaLongitude);
_clipmapLevels[i].ImageryHeight = (int)Math.Ceiling(_clipmapPosts * terrainLevel.PostDeltaLatitude / imageryLevel.PostDeltaLatitude);
_clipmapLevels[i].ImageryTexture = Device.CreateTexture2D(new Texture2DDescription(_clipmapLevels[i].ImageryWidth, _clipmapLevels[i].ImageryHeight, TextureFormat.RedGreenBlue8, false));
}
_shaderProgram = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.ClipmapTerrain.GlobeClipmapVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.ClipmapTerrain.GlobeClipmapFS.glsl"));
_fillPatchPosts = (clipmapPosts + 1) / 4; // M
_fillPatchSegments = _fillPatchPosts - 1;
// Create the MxM block used to fill the ring and the field.
Mesh fieldBlockMesh = RectangleTessellator.Compute(
new RectangleD(new Vector2D(0.0, 0.0), new Vector2D(_fillPatchSegments, _fillPatchSegments)),
_fillPatchSegments, _fillPatchSegments);
_fillPatch = context.CreateVertexArray(fieldBlockMesh, _shaderProgram.VertexAttributes, BufferHint.StaticDraw);
// Create the Mx3 block used to fill the space between the MxM blocks in the ring
Mesh ringFixupHorizontalMesh = RectangleTessellator.Compute(
new RectangleD(new Vector2D(0.0, 0.0), new Vector2D(_fillPatchSegments, 2.0)),
_fillPatchSegments, 2);
_horizontalFixupPatch = context.CreateVertexArray(ringFixupHorizontalMesh, _shaderProgram.VertexAttributes, BufferHint.StaticDraw);
// Create the 3xM block used to fill the space between the MxM blocks in the ring
Mesh ringFixupVerticalMesh = RectangleTessellator.Compute(
new RectangleD(new Vector2D(0.0, 0.0), new Vector2D(2.0, _fillPatchSegments)),
2, _fillPatchSegments);
_verticalFixupPatch = context.CreateVertexArray(ringFixupVerticalMesh, _shaderProgram.VertexAttributes, BufferHint.StaticDraw);
Mesh offsetStripHorizontalMesh = RectangleTessellator.Compute(
new RectangleD(new Vector2D(0.0, 0.0), new Vector2D(2 * _fillPatchPosts, 1.0)),
2 * _fillPatchPosts, 1);
_horizontalOffsetPatch = context.CreateVertexArray(offsetStripHorizontalMesh, _shaderProgram.VertexAttributes, BufferHint.StaticDraw);
Mesh offsetStripVerticalMesh = RectangleTessellator.Compute(
new RectangleD(new Vector2D(0.0, 0.0), new Vector2D(1.0, 2 * _fillPatchPosts - 1)),
1, 2 * _fillPatchPosts - 1);
_verticalOffsetPatch = context.CreateVertexArray(offsetStripVerticalMesh, _shaderProgram.VertexAttributes, BufferHint.StaticDraw);
Mesh centerMesh = RectangleTessellator.Compute(new RectangleD(new Vector2D(0.0, 0.0), new Vector2D(2.0, 2.0)), 2, 2);
_centerPatch = context.CreateVertexArray(centerMesh, _shaderProgram.VertexAttributes, BufferHint.StaticDraw);
Mesh degenerateTriangleMesh = CreateDegenerateTriangleMesh();
_degenerateTrianglePatch = context.CreateVertexArray(degenerateTriangleMesh, _shaderProgram.VertexAttributes, BufferHint.StaticDraw);
_patchOriginInClippedLevel = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_patchOriginInClippedLevel"];
_levelScaleFactor = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_levelScaleFactor"];
_levelZeroWorldScaleFactor = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_levelZeroWorldScaleFactor"];
_levelOffsetFromWorldOrigin = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_levelOffsetFromWorldOrigin"];
_heightExaggeration = (Uniform <float>)_shaderProgram.Uniforms["u_heightExaggeration"];
_viewPosInClippedLevel = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_viewPosInClippedLevel"];
_fineLevelOriginInCoarse = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_fineLevelOriginInCoarse"];
_unblendedRegionSize = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_unblendedRegionSize"];
_oneOverBlendedRegionSize = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_oneOverBlendedRegionSize"];
_fineTextureOrigin = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_fineTextureOrigin"];
_showBlendRegions = (Uniform <bool>)_shaderProgram.Uniforms["u_showBlendRegions"];
_useBlendRegions = (Uniform <bool>)_shaderProgram.Uniforms["u_useBlendRegions"];
_oneOverClipmapSize = (Uniform <float>)_shaderProgram.Uniforms["u_oneOverClipmapSize"];
_color = (Uniform <Vector3F>)_shaderProgram.Uniforms["u_color"];
_blendRegionColor = (Uniform <Vector3F>)_shaderProgram.Uniforms["u_blendRegionColor"];
_terrainToImageryResolutionRatio = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_terrainToImageryResolutionRatio"];
_terrainOffsetInImagery = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_terrainOffsetInImagery"];
_oneOverImagerySize = (Uniform <Vector2F>)_shaderProgram.Uniforms["u_oneOverImagerySize"];
_showImagery = (Uniform <bool>)_shaderProgram.Uniforms["u_showImagery"];
_lighting = (Uniform <bool>)_shaderProgram.Uniforms["u_shade"];
((Uniform <Vector3F>)_shaderProgram.Uniforms["u_globeRadiiSquared"]).Value =
ellipsoid.RadiiSquared.ToVector3F();
_renderState = new RenderState();
_renderState.FacetCulling.FrontFaceWindingOrder = fieldBlockMesh.FrontFaceWindingOrder;
_primitiveType = fieldBlockMesh.PrimitiveType;
float oneOverBlendedRegionSize = (float)(10.0 / _clipmapPosts);
_oneOverBlendedRegionSize.Value = new Vector2F(oneOverBlendedRegionSize, oneOverBlendedRegionSize);
float unblendedRegionSize = (float)(_clipmapSegments / 2 - _clipmapPosts / 10.0 - 1);
_unblendedRegionSize.Value = new Vector2F(unblendedRegionSize, unblendedRegionSize);
_useBlendRegions.Value = true;
_showImagery.Value = true;
_oneOverClipmapSize.Value = 1.0f / clipmapPosts;
_updater = new ClipmapUpdater(context, _clipmapLevels);
HeightExaggeration = 0.00001f;
}
public Polygon(Context context, Ellipsoid globeShape, IEnumerable <Vector3D> positions)
{
Verify.ThrowIfNull(context);
Verify.ThrowIfNull(globeShape);
//
// Pipeline Stage 1a: Clean up - Remove duplicate positions
//
List <Vector3D> cleanPositions = (List <Vector3D>)SimplePolygonAlgorithms.Cleanup(positions);
//
// Pipeline Stage 1b: Clean up - Swap winding order
//
EllipsoidTangentPlane plane = new EllipsoidTangentPlane(globeShape, cleanPositions);
ICollection <Vector2D> positionsOnPlane = plane.ComputePositionsOnPlane(cleanPositions);
if (SimplePolygonAlgorithms.ComputeWindingOrder(positionsOnPlane) == PolygonWindingOrder.Clockwise)
{
cleanPositions.Reverse();
//((List<Vector2D>)positionsOnPlane).Reverse();
}
//
// Pipeline Stage 2: Triangulate
//
IndicesUnsignedInt indices = EarClippingOnEllipsoid.Triangulate(cleanPositions);
//IndicesInt32 indices = EarClipping.Triangulate(positionsOnPlane);
//
// Pipeline Stage 3: Subdivide
//
TriangleMeshSubdivisionResult result = TriangleMeshSubdivision.Compute(cleanPositions, indices, Trig.ToRadians(1));
//
// Pipeline Stage 4: Set height
//
VertexAttributeDoubleVector3 positionsAttribute = new VertexAttributeDoubleVector3(
"position", (result.Indices.Values.Count / 3) + 2);
foreach (Vector3D position in result.Positions)
{
positionsAttribute.Values.Add(globeShape.ScaleToGeocentricSurface(position));
}
Mesh mesh = new Mesh();
mesh.PrimitiveType = PrimitiveType.Triangles;
mesh.FrontFaceWindingOrder = WindingOrder.Counterclockwise;
mesh.Attributes.Add(positionsAttribute);
mesh.Indices = result.Indices;
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Polygon.Shaders.PolygonVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Renderables.Polygon.Shaders.PolygonFS.glsl"));
((Uniform <Vector3F>)sp.Uniforms["u_globeOneOverRadiiSquared"]).Value = globeShape.OneOverRadiiSquared.ToVector3F();
_colorUniform = (Uniform <Vector4F>)sp.Uniforms["u_color"];
_drawState = new DrawState();
_drawState.RenderState.Blending.Enabled = true;
_drawState.RenderState.Blending.SourceRGBFactor = SourceBlendingFactor.SourceAlpha;
_drawState.RenderState.Blending.SourceAlphaFactor = SourceBlendingFactor.SourceAlpha;
_drawState.RenderState.Blending.DestinationRGBFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
_drawState.RenderState.Blending.DestinationAlphaFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
_drawState.ShaderProgram = sp;
_meshBuffers = Device.CreateMeshBuffers(mesh, _drawState.ShaderProgram.VertexAttributes, BufferHint.StaticDraw);
_primitiveType = mesh.PrimitiveType;
Color = Color.White;
}
public VertexDisplacementMapTerrainTile(Context context, TerrainTile tile)
{
//
// Upload height map as a one channel floating point texture
//
WritePixelBuffer pixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream,
sizeof(float) * tile.Heights.Length);
pixelBuffer.CopyFromSystemMemory(tile.Heights);
_texture = Device.CreateTexture2DRectangle(new Texture2DDescription(
tile.Resolution.X, tile.Resolution.Y, TextureFormat.Red32f));
_texture.CopyFromBuffer(pixelBuffer, ImageFormat.Red, ImageDatatype.Float);
///////////////////////////////////////////////////////////////////
ShaderProgram spTerrain = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.VertexDisplacementMapTerrainTile.TerrainVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.VertexDisplacementMapTerrainTile.TerrainFS.glsl"));
_heightExaggerationUniform = (Uniform <float>)spTerrain.Uniforms["u_heightExaggeration"];
((Uniform <Vector2F>)spTerrain.Uniforms["u_positionToTextureCoordinate"]).Value = new Vector2F(
(float)(1.0 / (double)(tile.Resolution.X)),
(float)(1.0 / (double)(tile.Resolution.Y)));
((Uniform <Vector2F>)spTerrain.Uniforms["u_positionToRepeatTextureCoordinate"]).Value = new Vector2F(
(float)(4.0 / (double)tile.Resolution.X),
(float)(4.0 / (double)tile.Resolution.Y));
///////////////////////////////////////////////////////////////////
ShaderProgram spNormals = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.VertexDisplacementMapTerrainTile.NormalsVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.VertexDisplacementMapTerrainTile.NormalsGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.VertexDisplacementMapTerrainTile.NormalsFS.glsl"));
_heightExaggerationNormals = (Uniform <float>)spNormals.Uniforms["u_heightExaggeration"];
_fillDistanceNormals = (Uniform <float>)spNormals.Uniforms["u_fillDistance"];
((Uniform <Vector3F>)spNormals.Uniforms["u_color"]).Value = Vector3F.Zero;
///////////////////////////////////////////////////////////////////
ShaderProgram spWireframe = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.VertexDisplacementMapTerrainTile.WireframeVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.VertexDisplacementMapTerrainTile.WireframeGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.VertexDisplacementMapTerrainTile.WireframeFS.glsl"));
_lineWidthWireframe = (Uniform <float>)spWireframe.Uniforms["u_halfLineWidth"];
_heightExaggerationWireframe = (Uniform <float>)spWireframe.Uniforms["u_heightExaggeration"];
((Uniform <Vector3F>)spWireframe.Uniforms["u_color"]).Value = Vector3F.Zero;
///////////////////////////////////////////////////////////////////
Mesh mesh = RectangleTessellator.Compute(new RectangleD(new Vector2D(0.5, 0.5),
new Vector2D((double)tile.Resolution.X - 0.5, (double)tile.Resolution.Y - 0.5)),
tile.Resolution.X - 1, tile.Resolution.Y - 1);
_va = context.CreateVertexArray(mesh, spWireframe.VertexAttributes, BufferHint.StaticDraw);
_primitiveType = mesh.PrimitiveType;
///////////////////////////////////////////////////////////////////
RenderState rsTerrain = new RenderState();
rsTerrain.FacetCulling.FrontFaceWindingOrder = mesh.FrontFaceWindingOrder;
RenderState rsWireframe = new RenderState();
rsWireframe.Blending.Enabled = true;
rsWireframe.Blending.SourceRGBFactor = SourceBlendingFactor.SourceAlpha;
rsWireframe.Blending.SourceAlphaFactor = SourceBlendingFactor.SourceAlpha;
rsWireframe.Blending.DestinationRGBFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
rsWireframe.Blending.DestinationAlphaFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
rsWireframe.FacetCulling.FrontFaceWindingOrder = mesh.FrontFaceWindingOrder;
rsWireframe.DepthTest.Function = DepthTestFunction.LessThanOrEqual;
RenderState rsNormals = new RenderState();
rsNormals.FacetCulling.Enabled = false;
rsNormals.Blending.Enabled = true;
rsNormals.Blending.SourceRGBFactor = SourceBlendingFactor.SourceAlpha;
rsNormals.Blending.SourceAlphaFactor = SourceBlendingFactor.SourceAlpha;
rsNormals.Blending.DestinationRGBFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
rsNormals.Blending.DestinationAlphaFactor = DestinationBlendingFactor.OneMinusSourceAlpha;
///////////////////////////////////////////////////////////////////
_drawStateTerrain = new DrawState(rsTerrain, spTerrain, _va);
_drawStateWireframe = new DrawState(rsWireframe, spWireframe, _va);
_drawStateNormals = new DrawState(rsNormals, spNormals, _va);
_tileMinimumHeight = tile.MinimumHeight;
_tileMaximumHeight = tile.MaximumHeight;
_heightExaggeration = 1;
_normalsAlgorithm = TerrainNormalsAlgorithm.ForwardDifference;
_showTerrain = true;
_dirty = true;
}
public TriangleMeshTerrainTile(Context context, TerrainTile tile)
{
ShaderProgram silhouetteSP = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.TriangleMeshTerrainTile.SilhouetteVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.TriangleMeshTerrainTile.SilhouetteGS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.TriangleMeshTerrainTile.SilhouetteFS.glsl"));
Uniform <float> fillDistance = (Uniform <float>)silhouetteSP.Uniforms["u_fillDistance"];
fillDistance.Value = 1.5f;
_silhouetteHeightExaggeration = (Uniform <float>)silhouetteSP.Uniforms["u_heightExaggeration"];
ShaderProgram sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.TriangleMeshTerrainTile.TerrainVS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Scene.Terrain.TriangleMeshTerrainTile.TerrainFS.glsl"));
_tileMinimumHeight = tile.MinimumHeight;
_tileMaximumHeight = tile.MaximumHeight;
_heightExaggeration = (Uniform <float>)sp.Uniforms["u_heightExaggeration"];
_minimumHeight = (Uniform <float>)sp.Uniforms["u_minimumHeight"];
_maximumHeight = (Uniform <float>)sp.Uniforms["u_maximumHeight"];
HeightExaggeration = 1;
///////////////////////////////////////////////////////////////////
Mesh mesh = new Mesh();
mesh.PrimitiveType = PrimitiveType.Triangles;
mesh.FrontFaceWindingOrder = WindingOrder.Counterclockwise;
int numberOfPositions = tile.Resolution.X * tile.Resolution.Y;
VertexAttributeDoubleVector3 positionsAttribute = new VertexAttributeDoubleVector3("position", numberOfPositions);
IList <Vector3D> positions = positionsAttribute.Values;
mesh.Attributes.Add(positionsAttribute);
int numberOfPartitionsX = tile.Resolution.X - 1;
int numberOfPartitionsY = tile.Resolution.Y - 1;
int numberOfIndices = (numberOfPartitionsX * numberOfPartitionsY) * 6;
IndicesUnsignedInt indices = new IndicesUnsignedInt(numberOfIndices);
mesh.Indices = indices;
//
// Positions
//
Vector2D lowerLeft = tile.Extent.LowerLeft;
Vector2D toUpperRight = tile.Extent.UpperRight - lowerLeft;
int heightIndex = 0;
for (int y = 0; y <= numberOfPartitionsY; ++y)
{
double deltaY = y / (double)numberOfPartitionsY;
double currentY = lowerLeft.Y + (deltaY * toUpperRight.Y);
for (int x = 0; x <= numberOfPartitionsX; ++x)
{
double deltaX = x / (double)numberOfPartitionsX;
double currentX = lowerLeft.X + (deltaX * toUpperRight.X);
positions.Add(new Vector3D(currentX, currentY, tile.Heights[heightIndex++]));
}
}
//
// Indices
//
int rowDelta = numberOfPartitionsX + 1;
int i = 0;
for (int y = 0; y < numberOfPartitionsY; ++y)
{
for (int x = 0; x < numberOfPartitionsX; ++x)
{
indices.AddTriangle(new TriangleIndicesUnsignedInt(i, i + 1, rowDelta + (i + 1)));
indices.AddTriangle(new TriangleIndicesUnsignedInt(i, rowDelta + (i + 1), rowDelta + i));
i += 1;
}
i += 1;
}
_drawState = new DrawState();
_drawState.RenderState.FacetCulling.FrontFaceWindingOrder = mesh.FrontFaceWindingOrder;
_drawState.ShaderProgram = sp;
_drawState.VertexArray = context.CreateVertexArray(mesh, sp.VertexAttributes, BufferHint.StaticDraw);
_silhouetteDrawState = new DrawState();
_silhouetteDrawState.RenderState.FacetCulling.Enabled = false;
_silhouetteDrawState.RenderState.DepthMask = false;
_silhouetteDrawState.VertexArray = _drawState.VertexArray;
_silhouetteDrawState.ShaderProgram = silhouetteSP;
_primitiveType = mesh.PrimitiveType;
_clearColor = new ClearState();
_clearColor.Buffers = ClearBuffers.ColorBuffer;
//
// Only depth needs to be cleared but include stencil for speed.
//
_clearDepthStencil = new ClearState();
_clearDepthStencil.Buffers = ClearBuffers.DepthBuffer | ClearBuffers.StencilBuffer;
}