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node_builder.go
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/
node_builder.go
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package opengl
import (
"errors"
"github.com/go-gl/mathgl/mgl32"
"github.com/xmn-services/buckets-network/domain/memory/worlds/scenes/nodes"
)
type nodeBuilder struct {
modelBuilder ModelBuilder
cameraBuilder CameraBuilder
node nodes.Node
}
func createNodeBuilder(
modelBuilder ModelBuilder,
cameraBuilder CameraBuilder,
) NodeBuilder {
out := nodeBuilder{
modelBuilder: modelBuilder,
cameraBuilder: cameraBuilder,
node: nil,
}
return &out
}
// Create initializes the builder
func (app *nodeBuilder) Create() NodeBuilder {
return createNodeBuilder(app.modelBuilder, app.cameraBuilder)
}
// WithNode adds a node to the builder
func (app *nodeBuilder) WithNode(node nodes.Node) NodeBuilder {
app.node = node
return app
}
// Now builds a new Node instance
func (app *nodeBuilder) Now() (Node, error) {
if app.node == nil {
return nil, errors.New("the node is mandatory in order to build a Node instance")
}
return app.convert(app.node)
}
func (app *nodeBuilder) convertAll(nodes []nodes.Node) ([]Node, error) {
out := []Node{}
for _, oneNode := range nodes {
node, err := app.convert(oneNode)
if err != nil {
return nil, err
}
out = append(out, node)
}
return out, nil
}
func (app *nodeBuilder) convert(node nodes.Node) (Node, error) {
domainPos := node.Position()
posVec := domainPos.Vector()
posVariable := domainPos.Variable()
pos := createPosition(
mgl32.Vec3{
posVec.X(),
posVec.Y(),
posVec.Z(),
},
posVariable,
)
domainOrientation := node.Orientation()
angle := domainOrientation.Angle()
domainDirection := domainOrientation.Direction()
orientationVariable := domainOrientation.Variable()
orientation := createOrientation(
angle,
mgl32.Vec3{
domainDirection.X(),
domainDirection.Y(),
domainDirection.Z(),
},
orientationVariable,
)
id := node.ID()
if !node.HasContent() {
return createNode(id, pos, orientation), nil
}
children := []Node{}
if node.HasChildren() {
domainChildren := node.Children()
list, err := app.convertAll(domainChildren)
if err != nil {
return nil, err
}
children = list
}
domainContent := node.Content()
if domainContent.IsModel() {
domainModel := domainContent.Model()
model, err := app.modelBuilder.Create().WithModel(domainModel).Now()
if err != nil {
return nil, err
}
content := createNodeContentWithModel(model)
if len(children) > 0 {
return createNodeWithContentAndChildren(id, pos, orientation, content, children), nil
}
return createNodeWithContent(id, pos, orientation, content), nil
}
if len(children) > 0 {
return createNodeWithChildren(id, pos, orientation, children), nil
}
return createNode(id, pos, orientation), nil
}