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 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);
}
private static ShaderVertexAttributeCollection FindVertexAttributes(ShaderProgramNameGL3x program)
{
int programHandle = program.Value;
int numberOfAttributes;
GL.GetProgram(programHandle, ProgramParameter.ActiveAttributes, out numberOfAttributes);
int attributeNameMaxLength;
GL.GetProgram(programHandle, ProgramParameter.ActiveAttributeMaxLength, out attributeNameMaxLength);
ShaderVertexAttributeCollection vertexAttributes = new ShaderVertexAttributeCollection();
for (int i = 0; i < numberOfAttributes; ++i)
{
int attributeNameLength;
int attributeLength;
ActiveAttribType attributeType;
StringBuilder attributeNameBuilder = new StringBuilder(attributeNameMaxLength);
GL.GetActiveAttrib(programHandle, i, attributeNameMaxLength,
out attributeNameLength, out attributeLength, out attributeType, attributeNameBuilder);
string attributeName = attributeNameBuilder.ToString();
if (attributeName.StartsWith("gl_", StringComparison.InvariantCulture))
{
//
// Names starting with the reserved prefix of "gl_" have a location of -1.
//
continue;
}
int attributeLocation = GL.GetAttribLocation(programHandle, attributeName);
vertexAttributes.Add(new ShaderVertexAttribute(
attributeName, attributeLocation, TypeConverterGL3x.To(attributeType), attributeLength));
}
return(vertexAttributes);
}
private static ShaderVertexAttributeCollection FindVertexAttributes(ShaderProgramNameGL3x program)
{
int programHandle = program.Value;
int numberOfAttributes;
GL.GetProgram(programHandle, ProgramParameter.ActiveAttributes, out numberOfAttributes);
int attributeNameMaxLength;
GL.GetProgram(programHandle, ProgramParameter.ActiveAttributeMaxLength, out attributeNameMaxLength);
ShaderVertexAttributeCollection vertexAttributes = new ShaderVertexAttributeCollection();
for (int i = 0; i < numberOfAttributes; ++i)
{
int attributeNameLength;
int attributeLength;
ActiveAttribType attributeType;
StringBuilder attributeNameBuilder = new StringBuilder(attributeNameMaxLength);
GL.GetActiveAttrib(programHandle, i, attributeNameMaxLength,
out attributeNameLength, out attributeLength, out attributeType, attributeNameBuilder);
string attributeName = attributeNameBuilder.ToString();
if (attributeName.StartsWith("gl_", StringComparison.InvariantCulture))
{
//
// Names starting with the reserved prefix of "gl_" have a location of -1.
//
continue;
}
int attributeLocation = GL.GetAttribLocation(programHandle, attributeName);
vertexAttributes.Add(new ShaderVertexAttribute(
attributeName, attributeLocation, TypeConverterGL3x.To(attributeType), attributeLength));
}
return vertexAttributes;
}