Add graph chart

SomeChartsUi/src/elements/charts/graph/GraphChart.cs

@@ -0,0 +1,81 @@
+using MathStuff;
+using MathStuff.vectors;
+using SomeChartsUi.data;
+using SomeChartsUi.themes.colors;
+using SomeChartsUi.themes.themes;
+using SomeChartsUi.ui.canvas;
+using SomeChartsUi.ui.elements;
+using SomeChartsUi.ui.layers.render;
+using SomeChartsUi.utils.mesh;
+using SomeChartsUi.utils.mesh.construction;
+using SomeChartsUi.utils.mesh.construction.line;
+
+namespace SomeChartsUi.elements.charts.graph; 
+
+public class GraphChart : RenderableBase {
+    public bool drawConnections = true;
+    public bool drawNodes = true;
+
+    public IChartData<float> nodeSize = new ConstChartData<float>(25f);
+    public IChartData<float> constNodeSize = new ConstChartData<float>(5f);
+    public IChartData<indexedColor> nodeColor = new ConstChartData<indexedColor>(theme.normal_ind);
+    public IChartData<float2> nodePosition;
+    public IChartManagedData<int[]> connections;
+    
+    private readonly List<Mesh> _meshes = new();
+
+    public LineConstructor lineConstructor = new BasicLine();
+
+    public GraphChart(ChartsCanvas owner) : base(owner) {
+        _meshes.Add(mesh!);
+    }
+    
+    public override void Render(RenderLayerId pass) {
+        if (pass == RenderLayerId.transparent) foreach (Mesh m in _meshes) DrawMesh(material, m);
+    }
+
+    protected override void GenerateMesh() {
+        foreach (Mesh m in _meshes) 
+            m.Clear();
+
+        int len = nodePosition.GetLength();
+        if (len < 1) return;
+
+        int meshIndex = -1;
+        NextMesh(ref meshIndex);
+
+        float2[] positions = new float2[len];
+        nodePosition.GetValues(0, len, 0, positions);
+
+        for (int i = 0; i < len; i++) {
+            float2 p = positions[i];
+            float s = nodeSize.GetValue(i) + constNodeSize.GetValue(i) / canvas.transform.scale.animatedValue.x;
+            color col = nodeColor.GetValue(i).GetColor();
+            
+            if (drawConnections) {
+                int[] nodeConnections = connections.GetValue(i);
+                if (nodeConnections.Length > 0) {
+                    color lineCol = col.WithAlpha(80);
+
+                    foreach (int connection in nodeConnections) {
+                        float2 p1 = positions[connection];
+                        lineConstructor.Construct(_meshes[meshIndex], p, p1, null, lineCol, canvas, -0.01f);
+                    }
+                }
+            }
+            
+            if (drawNodes)
+                _meshes[meshIndex].AddPolygon(p, s, 4, col);
+            
+            if (_meshes[meshIndex].vertices.count > 60_000)
+                NextMesh(ref meshIndex);
+        }
+        
+        foreach (Mesh m in _meshes) m.OnModified();
+    }
+
+    private void NextMesh(ref int index) {
+        index++;
+        if (index >= _meshes.Count) _meshes.Add(canvas.factory.CreateMesh());
+    }
+}