private void DrawNodes(NetworkGraphState <T> state)
{
GL.UseProgram(_circleShader.Handle);
var vpMat = state.Camera.Current.ViewProjection;
GL.UniformMatrix4(_circleShader.Uniforms["ViewProjectionMatrix"].Location, false, ref vpMat);
var quad = Primitives.Quad;
GL.BindVertexArray(quad.Handle);
// draw the nodes:
for (var i = 0; i < state.Positions.Length; i++)
{
GL.Uniform2(_circleShader.Uniforms["Position"].Location, state.Positions[i]);
var size = _cfg.WeightToScale(state.Weights[i]);
GL.Uniform2(_circleShader.Uniforms["Scale"].Location, Vector2.One * size);
var category = state.Categories[i];
var catCol = _cfg.CategoryColors[category % _cfg.CategoryColors.Length];
var col = i == state.SelectedIndex ? _cfg.SelectedCol : catCol;
GL.Uniform4(_circleShader.Uniforms["Color"].Location, col);
GL.DrawElements(PrimitiveType.TriangleStrip, quad.ElementCount, DrawElementsType.UnsignedInt, 0);
}
GL.UseProgram(0);
GL.BindVertexArray(0);
}
public NetworkGraph([NotNull] NetworkGraphData <T> data, [CanBeNull] NetworkGraphConfig cfg = null)
{
cfg ??= NetworkGraphConfig.Default;
cfg = cfg.Copy();
_cfg = cfg;
_data = data;
_state = new NetworkGraphState <T>(data, cfg);
_renderer = new NetworkGraphRenderer <T>(cfg);
}
private static bool IsAdjacentSelected(NetworkGraphState <T> state, int idx)
{
var selectedIdx = state.SelectedIndex;
if (selectedIdx == -1 || idx == -1)
{
return(false);
}
if (selectedIdx == idx)
{
return(true);
}
var con1 = state.ConnectionStrengths[selectedIdx, idx];
var con2 = state.ConnectionStrengths[idx, selectedIdx];
return(con1 > 0 || con2 > 0);
}
internal void Render(NetworkGraphState <T> state)
{
if (!_hasSetupGraphics)
{
_hasSetupGraphics = true;
SetupGraphics();
}
DrawNodes(state);
DrawLinks(state);
if (_cfg.LabelDisplayMode != LabelDisplayMode.Never)
{
DrawLabels(state);
}
var suppressedMessages = new[] { 131185 };
GLDebugLog.Deactivate(DebugSourceControl.DebugSourceApi, DebugTypeControl.DebugTypeOther, suppressedMessages);
}
private void DrawLinks(NetworkGraphState <T> state)
{
// draw the links:
GL.UseProgram(_solidShader.Handle);
var vpMat = state.Camera.Current.ViewProjection;
GL.UniformMatrix4(_solidShader.Uniforms["ViewProjectionMatrix"].Location, false, ref vpMat);
GL.Uniform2(_solidShader.Uniforms["Scale"].Location, Vector2.One);
GL.Uniform4(_solidShader.Uniforms["Color"].Location, Color4.White);
// hacky buffer-based approach:
var bufferData = new Vector2[state.Links.Length * 2];
for (var i = 0; i < state.Links.Length; i++)
{
var(left, right) = state.Links[i];
bufferData[i * 2] = state.Positions[left];
bufferData[i * 2 + 1] = state.Positions[right];
}
GL.BindBuffer(BufferTarget.ArrayBuffer, _lineVertexBuffer);
int elemSize;
unsafe {
elemSize = sizeof(Vector2);
}
GL.BufferData(BufferTarget.ArrayBuffer, elemSize * bufferData.Length, bufferData, BufferUsageHint.StreamDraw);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
// draw the vertex array for the lines.
GL.BindVertexArray(_lineVao);
GL.DrawArrays(PrimitiveType.Lines, 0, bufferData.Length);
GL.BindVertexArray(0);
GL.UseProgram(0);
}
private void DrawLabels(NetworkGraphState <T> state)
{
GL.UseProgram(_textShader.Handle);
var vpMat = state.Camera.Current.ViewProjection;
GL.UniformMatrix4(_textShader.Uniforms["ViewProjectionMatrix"].Location, false, ref vpMat);
var quad = Primitives.Quad;
GL.BindVertexArray(quad.Handle);
var fixedScale = 0.025f * state.Camera.Current.VerticalSize;
// draw the nodes:
for (var i = 0; i < state.Nodes.Length; i++)
{
float opacity;
switch (_cfg.LabelDisplayMode)
{
case LabelDisplayMode.Never:
opacity = 0;
break;
case LabelDisplayMode.Always:
opacity = 1;
break;
case LabelDisplayMode.Selected:
opacity = i == state.SelectedIndex ? 1 : 0;
break;
case LabelDisplayMode.SelectedAndAdjacent:
opacity = IsAdjacentSelected(state, i) ? 1 : 0;
break;
default:
throw new ArgumentOutOfRangeException();
}
var label = state.Nodes[i].ToString();
var tex = TextRendering.GetTextTexture(label);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, tex.Handle);
GL.Uniform1(_textShader.Uniforms["tex"].Location, 0);
var aspect = (float)tex.Width / tex.Height;
var size = _cfg.LabelScaleMode == LabelScaleMode.Fixed ? fixedScale: 0.2f;
var scale = new Vector2(aspect, 1.0f) * size;
var renderScale = scale * _cfg.TextScale;
GL.Uniform2(_textShader.Uniforms["Scale"].Location, renderScale);
var pos = state.Positions[i];
// pos.X += 0.66f*size * aspect;
// pos.Y -= size;
GL.Uniform2(_textShader.Uniforms["Position"].Location, pos);
var unselectedCol = _cfg.LabelColor;
var col = i == state.SelectedIndex ? _cfg.SelectedLabelCol : unselectedCol;
col.A = opacity;
GL.Uniform4(_textShader.Uniforms["Color"].Location, col);
GL.DrawElements(PrimitiveType.TriangleStrip, quad.ElementCount, DrawElementsType.UnsignedInt, 0);
}
GL.UseProgram(0);
GL.BindVertexArray(0);
}