optimize Drawer (reduce map access)
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parent
2c9c36ba28
commit
e41c8b585b
61
drawer.go
61
drawer.go
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@ -24,23 +24,19 @@ type Drawer struct {
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Triangles Triangles
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Picture Picture
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tris map[Target]TargetTriangles
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clean map[Target]bool
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pics map[targetPicturePair]TargetPicture
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dirty bool
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inited bool
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targets map[Target]*drawerTarget
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inited bool
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}
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type targetPicturePair struct {
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Target Target
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Picture Picture
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type drawerTarget struct {
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tris TargetTriangles
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pics map[Picture]TargetPicture
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clean bool
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}
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func (d *Drawer) lazyInit() {
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if !d.inited {
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d.tris = make(map[Target]TargetTriangles)
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d.clean = make(map[Target]bool)
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d.pics = make(map[targetPicturePair]TargetPicture)
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d.targets = make(map[Target]*drawerTarget)
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d.inited = true
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}
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}
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@ -50,7 +46,9 @@ func (d *Drawer) lazyInit() {
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func (d *Drawer) Dirty() {
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d.lazyInit()
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d.dirty = true
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for _, t := range d.targets {
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t.clean = false
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}
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}
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// Draw efficiently draws Triangles with Picture onto the provided Target.
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@ -60,40 +58,39 @@ func (d *Drawer) Dirty() {
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func (d *Drawer) Draw(t Target) {
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d.lazyInit()
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if d.dirty {
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for t := range d.clean {
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d.clean[t] = false
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}
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d.dirty = false
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}
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if d.Triangles == nil {
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return
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}
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tri := d.tris[t]
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if tri == nil {
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tri = t.MakeTriangles(d.Triangles)
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d.tris[t] = tri
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d.clean[t] = true
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dt := d.targets[t]
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if dt == nil {
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dt = &drawerTarget{
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pics: make(map[Picture]TargetPicture),
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}
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d.targets[t] = dt
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}
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if !d.clean[t] {
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tri.SetLen(d.Triangles.Len())
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tri.Update(d.Triangles)
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d.clean[t] = true
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if dt.tris == nil {
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dt.tris = t.MakeTriangles(d.Triangles)
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dt.clean = true
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}
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if !dt.clean {
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dt.tris.SetLen(d.Triangles.Len())
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dt.tris.Update(d.Triangles)
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dt.clean = true
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}
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if d.Picture == nil {
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tri.Draw()
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dt.tris.Draw()
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return
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}
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pic := d.pics[targetPicturePair{t, d.Picture}]
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pic := dt.pics[d.Picture]
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if pic == nil {
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pic = t.MakePicture(d.Picture)
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d.pics[targetPicturePair{t, d.Picture}] = pic
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dt.pics[d.Picture] = pic
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}
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pic.Draw(tri)
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pic.Draw(dt.tris)
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}
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