public void CreateFeaturesForLayerIfRequired(int layerToCreate) { if (extrusionColors == null && gCodeFileToDraw != null && gCodeFileToDraw.Count > 0) { extrusionColors = new ExtrusionColors(); HashSet <float> speeds = new HashSet <float>(); PrinterMachineInstruction prevInstruction = gCodeFileToDraw.Instruction(0); for (int i = 1; i < gCodeFileToDraw.Count; i++) { PrinterMachineInstruction instruction = gCodeFileToDraw.Instruction(i); if (instruction.EPosition > prevInstruction.EPosition) { speeds.Add((float)instruction.FeedRate); } prevInstruction = instruction; } foreach (float speed in speeds) { extrusionColors.GetColorForSpeed(speed); } } if (renderFeatures.Count == 0 || renderFeatures[layerToCreate].Count > 0) { return; } List <RenderFeatureBase> renderFeaturesForLayer = renderFeatures[layerToCreate]; int startRenderIndex = gCodeFileToDraw.GetInstructionIndexAtLayer(layerToCreate); int endRenderIndex = gCodeFileToDraw.Count - 1; if (layerToCreate < gCodeFileToDraw.NumChangesInZ - 1) { endRenderIndex = gCodeFileToDraw.GetInstructionIndexAtLayer(layerToCreate + 1); } for (int i = startRenderIndex; i < endRenderIndex; i++) { PrinterMachineInstruction currentInstruction = gCodeFileToDraw.Instruction(i); PrinterMachineInstruction previousInstruction = currentInstruction; if (i > 0) { previousInstruction = gCodeFileToDraw.Instruction(i - 1); } if (currentInstruction.Position == previousInstruction.Position) { if (Math.Abs(currentInstruction.EPosition - previousInstruction.EPosition) > 0) { // this is a retraction renderFeaturesForLayer.Add(new RenderFeatureRetract(currentInstruction.Position, currentInstruction.EPosition - previousInstruction.EPosition, currentInstruction.ExtruderIndex, currentInstruction.FeedRate)); } if (currentInstruction.Line.StartsWith("G10")) { renderFeaturesForLayer.Add(new RenderFeatureRetract(currentInstruction.Position, -1, currentInstruction.ExtruderIndex, currentInstruction.FeedRate)); } else if (currentInstruction.Line.StartsWith("G11")) { renderFeaturesForLayer.Add(new RenderFeatureRetract(currentInstruction.Position, 1, currentInstruction.ExtruderIndex, currentInstruction.FeedRate)); } } else { if (gCodeFileToDraw.IsExtruding(i)) { double layerThickness = gCodeFileToDraw.GetLayerHeight(); if (layerToCreate == 0) { layerThickness = gCodeFileToDraw.GetFirstLayerHeight(); } renderFeaturesForLayer.Add(new RenderFeatureExtrusion(previousInstruction.Position, currentInstruction.Position, currentInstruction.ExtruderIndex, currentInstruction.FeedRate, currentInstruction.EPosition - previousInstruction.EPosition, gCodeFileToDraw.GetFilamentDiamter(), layerThickness, extrusionColors.GetColorForSpeed((float)currentInstruction.FeedRate))); } else { renderFeaturesForLayer.Add(new RenderFeatureTravel(previousInstruction.Position, currentInstruction.Position, currentInstruction.ExtruderIndex, currentInstruction.FeedRate)); } } } TotalRenderFeatures += renderFeaturesForLayer.Count; }