71 lines
1.8 KiB
Go
71 lines
1.8 KiB
Go
package main
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import (
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"github.com/divan/graphx/graph"
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"github.com/divan/graphx/layout"
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"github.com/divan/three"
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)
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// CreateObjects creates WebGL primitives from layout/graphGroup data.
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// TODO(divan): change positions and links types to something more clear and readable
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func (w *WebGLScene) CreateObjects(positions map[string]*layout.Object, links []*graph.Link) {
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w.graphGroup = three.NewGroup()
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w.scene.Add(w.graphGroup)
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w.nodesGroup = three.NewGroup()
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w.graphGroup.Add(w.nodesGroup)
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w.edgesGroup = three.NewGroup()
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w.graphGroup.Add(w.edgesGroup)
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w.createNodes(positions)
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w.createEdges(positions, links)
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}
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func (w *WebGLScene) createNodes(positions map[string]*layout.Object) {
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scale := 2.0
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geometry := NewEthereumGeometry(scale)
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material := NewNodeMaterial()
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for _, node := range positions {
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mesh := three.NewMesh(geometry, material)
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mesh.Position.Set(node.X, node.Y, node.Z)
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w.nodesGroup.Add(mesh)
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w.nodes = append(w.nodes, mesh)
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}
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}
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func (w *WebGLScene) createEdges(positions map[string]*layout.Object, links []*graph.Link) {
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material := NewEdgeMaterial()
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for _, link := range links {
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from := link.From()
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to := link.To()
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start := positions[from]
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end := positions[to]
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var geom = three.NewBasicGeometry(three.BasicGeometryParams{})
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geom.AddVertice(start.X, start.Y, start.Z)
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geom.AddVertice(end.X, end.Y, end.Z)
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line := three.NewLine(geom, material)
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w.edgesGroup.Add(line)
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w.lines = append(w.lines, line)
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}
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}
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// RemoveObjects removes WebGL primitives, cleaning up scene.
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func (w *WebGLScene) RemoveObjects() {
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if w.nodesGroup != nil {
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for _, child := range w.nodesGroup.Children {
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w.nodesGroup.Remove(child)
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}
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}
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if w.edgesGroup != nil {
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for _, child := range w.edgesGroup.Children {
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w.edgesGroup.Remove(child)
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}
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}
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w.nodes, w.lines = nil, nil
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w.graphGroup, w.nodesGroup, w.edgesGroup = nil, nil, nil
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}
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