Graph

OkGraph is a generic graph of nodes and edges that renders itself. Build it with addNode / addEdge, call rebuild(), and add it to the scene. Use it for navigation graphs, waypoints, or any node/edge structure you want to visualise. The node/edge data stays queryable, so the same graph can drive logic, not just visuals.

#include "okinawa/graph/graph.hpp"

OkGraph *g = new OkGraph("nav");
int a = g->addNode(OkPoint(0, 0, 0));
int b = g->addNode(OkPoint(10, 0, 0));
g->addEdge(a, b);

g->setEdgeColor(1.0f, 0.55f, 0.0f);  // orange edges
g->setShowNodes(true);               // also draw the nodes
g->setNodeColor(1.0f, 1.0f, 1.0f);
g->setNodeSize(5.0f);
g->rebuild();                        // (re)generate geometry after changes
scene->addObject(g);

Render modes

setRenderMode(...) picks how it is drawn (then rebuild()):

• RENDER_LINES (default) — edges as GL_LINES, nodes as GL_POINTS (setNodeSize, pixels). Cheap, thin.
• RENDER_POLYGONS — edges as filled ribbons (setEdgeWidth, metres), nodes as filled quads (setNodeMarkerSize, metres). Thicker, more visible, more geometry.

Both honour setEdgeColor / setNodeColor and setShowEdges / setShowNodes.

How it renders

OkGraph is an object (transform + hierarchy). It does not draw geometry itself; rebuild() composes internal OkItems attached as children (one for edges, one for nodes), reusing the standard item rendering and per-item colour. Mutate the graph and call rebuild() to refresh.

API