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WIP: drawdag

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This commit is contained in:
Josh Deprez 2021-09-19 20:29:26 +10:00
parent 3c5c0a77b8
commit aafa6204ed
1 changed files with 22 additions and 21 deletions
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27
engine/drawlist.go
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@ -153,7 +153,6 @@ func (d *drawList) topsort(π geom.Projector) {
type drawDAG struct { type drawDAG struct {
*dag *dag
planes set
chunks map[image.Point]set chunks map[image.Point]set
chunksRev map[Drawer]image.Rectangle chunksRev map[Drawer]image.Rectangle
chunkSize int chunkSize int
@ -163,7 +162,6 @@ type drawDAG struct {
func newDrawDAG(chunkSize int) *drawDAG { func newDrawDAG(chunkSize int) *drawDAG {
return &drawDAG{ return &drawDAG{
dag: newDAG(), dag: newDAG(),
planes: make(set), // drawers that take up whole plane
chunks: make(map[image.Point]set), // chunk coord -> drawers with bounding rects intersecting chunk chunks: make(map[image.Point]set), // chunk coord -> drawers with bounding rects intersecting chunk
chunksRev: make(map[Drawer]image.Rectangle), // drawer -> rectangle of chunk coords chunksRev: make(map[Drawer]image.Rectangle), // drawer -> rectangle of chunk coords
chunkSize: chunkSize, chunkSize: chunkSize,
@ -172,28 +170,31 @@ func newDrawDAG(chunkSize int) *drawDAG {
// add adds a Drawer and any needed edges to the DAG and chunk map. // add adds a Drawer and any needed edges to the DAG and chunk map.
func (d *drawDAG) add(x Drawer) { func (d *drawDAG) add(x Drawer) {
switch x := x.(type) { bb := x.(BoundingBoxer)
case BoundingBoxer: br := bb.BoundingBox().BoundingRect(d.proj)
br := x.BoundingBox().BoundingRect(d.proj)
min := br.Min.Div(d.chunkSize) min := br.Min.Div(d.chunkSize)
max := br.Max.Sub(image.Pt(1, 1)).Div(d.chunkSize) max := br.Max.Sub(image.Pt(1, 1)).Div(d.chunkSize)
cand := make(set) cand := make(set)
for j := min.Y; j <= max.Y; j++ { for j := min.Y; j <= max.Y; j++ {
for i := min.X; i <= max.X; i++ { for i := min.X; i <= max.X; i++ {
for c := range d.chunks[image.Pt(i, j)] { cell := d.chunks[image.Pt(i, j)]
// Merge cell into cand
for c := range cell {
cand[c] = struct{}{} cand[c] = struct{}{}
} }
// Add x to cell
cell[x] = struct{}{}
} }
} }
// Add edges between x and elements of cand
for c := range cand { for c := range cand {
// TODO: x before or after c? y := c.(Drawer)
d.dag.addEdge(c, x) switch {
d.dag.addEdge(x, c) case edge(y, x, d.proj.Sign()):
d.dag.addEdge(y, x)
case edge(x, y, d.proj.Sign()):
d.dag.addEdge(x, y)
} }
case ZPositioner:
// TODO: Flat plane
d.planes[x] = struct{}{}
} }
} }