protected override void OnLoad(EventArgs e)
{
CheckFboExtension();
// the scene can be create after the GL context is prepared
scene = new Scene();
Keyboard.KeyUp += KeyUp;
Keyboard.KeyRepeat = true;
Mouse.Move += MouseMove;
Mouse.ButtonDown += MouseButtonHandler;
Mouse.ButtonUp += MouseButtonHandler;
Mouse.WheelChanged += MouseWheelChanged;
modules.Add(multiViewAccum);
modules.Add(depthPeeler);
modules.Add(nBuffers);
modules.Add(ibrt);
modules.Add(layerVisualizer);
modules.Add(nBuffersVisualizer);
//modules.Add(transparency);
// also the modules can be initialized after the GL context is prepared
foreach (var module in modules)
{
module.Initialize(Width, Height);
}
ibrt.DepthPeeler = depthPeeler;
//transparency.DepthPeeler = depthPeeler;
layerVisualizer.DepthPeeler = depthPeeler;
nBuffersVisualizer.NBuffers = nBuffers;
ibrt.NBuffers = nBuffers;
ibrt.Navigation = navigation;
multiViewAccum.Navigation = navigation;
GL.Enable(EnableCap.DepthTest);
GL.ClearDepth(1.0f);
//GL.Hint(HintTarget.PolygonSmoothHint, HintMode.Nicest);
//GL.Light(LightName.Light0, LightParameter.Position, new float[] { 3.0f, 3.0f, 3.0f });
//GL.Light(LightName.Light0, LightParameter.Ambient, new float[] { 0.3f, 0.3f, 0.3f, 1.0f });
//GL.Light(LightName.Light0, LightParameter.Diffuse, new float[] { 1.0f, 1.0f, 1.0f, 1.0f });
//GL.Light(LightName.Light0, LightParameter.Specular, new float[] { 1.0f, 1.0f, 1.0f, 1.0f });
//GL.Light(LightName.Light0, LightParameter.SpotExponent, new float[] { 1.0f, 1.0f, 1.0f, 1.0f });
//GL.LightModel(LightModelParameter.LightModelAmbient, new float[] { 0.2f, 0.2f, 0.2f, 1.0f });
//GL.LightModel(LightModelParameter.LightModelTwoSide, 1);
//GL.LightModel(LightModelParameter.LightModelLocalViewer, 1);
//GL.Enable(EnableCap.Lighting);
//GL.Enable(EnableCap.Light0);
//GL.Material(MaterialFace.Front, MaterialParameter.Ambient, new float[] { 0.3f, 0.3f, 0.3f, 1.0f });
//GL.Material(MaterialFace.Front, MaterialParameter.Diffuse, new float[] { 1.0f, 1.0f, 1.0f, 1.0f });
//GL.Material(MaterialFace.Front, MaterialParameter.Specular, new float[] { 1.0f, 1.0f, 1.0f, 1.0f });
//GL.Material(MaterialFace.Front, MaterialParameter.Emission, new float[] { 0.0f, 0.0f, 0.0f, 1.0f });
//GL.ShadeModel(ShadingModel.Smooth);
GL.Enable(EnableCap.Texture2D);
OnResize(new EventArgs());
}
public void DrawSingleFrame(Scene scene, Navigation navigation)
{
DrawSingleFrame(0, scene, navigation);
}
protected override void DrawSingleFrame(int iteration, Scene scene, Navigation navigation)
{
Debug.Assert(DepthPeeler != null);
Camera camera = navigation.Camera;
ComputeSensorTransform(camera);
GL.ClearColor(0f, 0f, 0f, 1f);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
// bind color and depth textures
GL.ActiveTexture(TextureUnit.Texture0);
int lensSampleTex = IncrementalModeEnabled
? incrementalLensSampleTexture
: previewLensSampleTexture;
GL.BindTexture(TextureTarget.Texture3D, lensSampleTex);
//GL.ActiveTexture(TextureUnit.Texture1);
//GL.BindTexture(TextureTarget.Texture1D, pixelSampleTexture);
GL.ActiveTexture(TextureUnit.Texture2);
GL.BindTexture(TextureTarget.Texture2DArray, DepthPeeler.PackedDepthTextures);
GL.ActiveTexture(TextureUnit.Texture3);
GL.BindTexture(TextureTarget.Texture2DArray, DepthPeeler.ColorTextures);
GL.ActiveTexture(TextureUnit.Texture4);
GL.BindTexture(TextureTarget.Texture2DArray, NBuffers.NBuffersTextures);
// enable IBRT shader
GL.UseProgram(shaderProgram);
// set shader parameters (textures, lens model, ...)
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "lensSamplesTexture"), 0);
//GL.Uniform1(GL.GetUniformLocation(shaderProgram, "pixelSamplesTexture"), 1);
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "packedDepthTexture"), 2);
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "colorTexture"), 3);
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "nBuffersTexture"), 4);
GL.Uniform2(GL.GetUniformLocation(shaderProgram, "nBuffersSize"), NBuffers.Size);
GL.Uniform2(GL.GetUniformLocation(shaderProgram, "sensorSize"), camera.SensorSize);
//GL.Uniform1(GL.GetUniformLocation(shaderProgram, "sensorZ"), camera.SensorZ);
GL.Uniform3(GL.GetUniformLocation(shaderProgram, "sensorShift"), camera.SensorShift3);
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "near"), camera.Near);
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "far"), camera.Far);
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "lensFocalLength"), camera.Lens.FocalLength);
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "lensApertureRadius"), camera.Lens.ApertureRadius);
//Matrix4 perspective = camera.Perspective;
//GL.UniformMatrix4(GL.GetUniformLocation(shaderProgram, "perspective"), false, ref perspective);
GL.Uniform4(GL.GetUniformLocation(shaderProgram, "frustumBounds"), camera.FrustumBounds);
// jittering
GL.Uniform2(GL.GetUniformLocation(shaderProgram, "screenSize"), new Vector2(Width, Height));
GL.Uniform2(GL.GetUniformLocation(shaderProgram, "screenSizeInv"), new Vector2(1.0f / Width, 1.0f / Height));
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "sampleCount"), (IncrementalModeEnabled ? SampleCount : PreviewSampleCount));
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "sampleCountInv"), 1.0f / (IncrementalModeEnabled ? SampleCount : PreviewSampleCount));
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "sampleIndexOffset"), IncrementalModeEnabled ? SampleCount * iteration : 0);
GL.Uniform1(GL.GetUniformLocation(shaderProgram, "totalSampleCount"), IncrementalModeEnabled ? MaxTotalSampleCount : PreviewSampleCount);
//GL.Uniform1(GL.GetUniformLocation(shaderProgram, "sampleCount"), SampleCount);
//GL.Uniform1(GL.GetUniformLocation(shaderProgram, "sampleCountInv"), 1.0f / SampleCount);
//GL.Uniform1(GL.GetUniformLocation(shaderProgram, "sampleIndexOffset"), SampleCount * iteration);
//GL.Uniform1(GL.GetUniformLocation(shaderProgram, "totalSampleCount"), TotalSampleCount);
GL.Uniform2(GL.GetUniformLocation(shaderProgram, "cameraShift"), camera.LensShift);
GL.UniformMatrix3(GL.GetUniformLocation(shaderProgram, "sensorTransform"), 1, false, sensorTransform3x3);
// draw the quad
LayerHelper.DrawQuad();
// disable shader
GL.UseProgram(0);
// unbind textures
GL.ActiveTexture(TextureUnit.Texture4);
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.ActiveTexture(TextureUnit.Texture3);
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.ActiveTexture(TextureUnit.Texture2);
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.ActiveTexture(TextureUnit.Texture1);
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, 0);
}
public void PeelLayers(Scene scene)
{
// put the results into color and depth textures via FBO
GL.Ext.BindFramebuffer(FramebufferTarget.FramebufferExt, fboHandle);
AttachLayerTextures(0);
GL.Enable(EnableCap.Texture2D);
// draw the first layer without the depth peeling shader
// (there is no previous depth layer to compare)
scene.ShaderManager.DepthPeelingData.Enabled = false;
scene.Draw();
// draw the rest of layers with depth peeling
scene.ShaderManager.DepthPeelingData.Enabled = true;
// Use an other texture unit than 0 as drawing the scene with
// fixed-function pipeline might use it by default.
GL.ActiveTexture(TextureUnit.Texture8);
// Use the previous depth layer for manual depth comparisons.
GL.BindTexture(TextureTarget.Texture2DArray, depthTextures);
scene.ShaderManager.DepthPeelingData.DepthTexture = 8; // TextureUnit.Texture8
scene.ShaderManager.DepthPeelingData.DepthTextureSizeInv = depthTextureSizeInv;
for (int i = 1; i < LayerCount; i++)
{
AttachLayerTextures(i);
scene.ShaderManager.DepthPeelingData.PreviousLayerIndex = i - 1;
scene.Draw();
}
GL.ActiveTexture(TextureUnit.Texture8);
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.ActiveTexture(TextureUnit.Texture0);
GL.Ext.FramebufferTextureLayer(
FramebufferTarget.FramebufferExt, FramebufferAttachment.DepthAttachmentExt,
0, 0, 0);
GL.Ext.FramebufferTextureLayer(
FramebufferTarget.FramebufferExt, FramebufferAttachment.ColorAttachment0Ext,
0, 0, 0);
//GL.BindTexture(TextureTarget.Texture2DArray, colorTextures);
//GL.Ext.GenerateMipmap(GenerateMipmapTarget.Texture2DArray);
PackDepthImages();
}