private void Render(object sender, FrameEventArgs e)
{
// Reset the view
GL.Clear(ClearBufferMask.ColorBufferBit |
ClearBufferMask.DepthBufferBit |
ClearBufferMask.StencilBufferBit);
//GL.PushMatrix();
NanoVG.nvgBeginFrame(Nvg, Width, Height, 1);
NanoVG.nvgSave(Nvg);
NanoVG.nvgScale(Nvg, Zoom, Zoom);
//_grid.Draw();
NanoVG.nvgTranslate(Nvg, _nodeRenderer.gridOffset.X, _nodeRenderer.gridOffset.Y);
NanoVG.nvgStrokeWidth(Nvg, 2);
NanoVG.nvgStrokeColor(Nvg, NanoVG.nvgRGBA(0, 0, 0, 255));
NanoVG.nvgBeginPath(Nvg);
NanoVG.nvgMoveTo(Nvg, -_nodeRenderer.gridPitch, 0);
NanoVG.nvgLineTo(Nvg, _nodeRenderer.gridPitch, 0);
NanoVG.nvgStroke(Nvg);
NanoVG.nvgBeginPath(Nvg);
NanoVG.nvgMoveTo(Nvg, 0, -_nodeRenderer.gridPitch);
NanoVG.nvgLineTo(Nvg, 0, _nodeRenderer.gridPitch);
NanoVG.nvgStroke(Nvg);
const int cxnLineWidth = 3;
NanoVG.nvgStrokeWidth(Nvg, cxnLineWidth);
if (Selection.DraggingConnection != null)
{
var end = _mouseCanvasSpace;
if (Selection.CreatingConnectedNode)
{
end = new Vector2(_contextMenu.X, _contextMenu.Y);
}
var picked = Selection.HoveringConnection;
if (picked != null && picked.Side != Selection.DraggingConnection.Side)
{
var b = picked.GetBounds();
end = new Vector2(b.X, b.Y);
}
_nodeRenderer.RenderConnection(Selection.DraggingConnection, end);
}
foreach (var node in Graph)
{
_nodeRenderer.RenderConnections(node);
}
foreach (var node in Graph)
{
_nodeRenderer.RenderNode(node);
}
if (Selection.SelectionRectangle != null && Selection.SelectionRectangle.Width != 0 && Selection.SelectionRectangle.Height != 0)
{
NanoVG.nvgFillColor(Nvg, _selectionRectangleColor.ToNvgColor());
NanoVG.nvgBeginPath(Nvg);
var r = Selection.SelectionRectangle;
var x = Math.Min(r.X, r.X + r.Width);
var y = Math.Min(r.Y, r.Y + r.Height);
var w = Math.Abs(r.Width);
var h = Math.Abs(r.Height);
NanoVG.nvgRect(Nvg, x, y, w, h);
NanoVG.nvgFill(Nvg);
}
NanoVG.nvgRestore(Nvg);
_contextMenu.Render();
GL.Color4(0, 0, 0, 1f);
if (Keyboard[Key.D] && Focused && TextBoxHandler.TextBox == null)
{
// Static diagnostic header
NanoVG.nvgSave(Nvg);
NanoVG.nvgFillColor(Nvg, Color.Black.ToNvgColor());
NvgHelper.RenderString($"{Zoom}x Zoom");
NanoVG.nvgTranslate(Nvg, 0, FontLineHeight);
NvgHelper.RenderString($"{Graph.Count} Nodes");
// Sparklines
// GL.Translate(5, (int)(Height - Font.Common.LineHeight * 1.4f * 2), 0);
// _fpsSparkline.Render(Color.Blue, Color.LimeGreen);
// GL.Translate(0, (int)(Font.Common.LineHeight * 1.4f), 0);
// _renderTimeSparkline.Render(Color.Blue, Color.LimeGreen);
NanoVG.nvgRestore(Nvg);
}
NanoVG.nvgEndFrame(Nvg);
// Swap the graphics buffer
SwapBuffers();
}