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use PrismTop in draw order decision

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This commit is contained in:
Josh Deprez 2021-09-11 17:47:31 +10:00
parent a5083b4eac
commit 7c16de018d
1 changed files with 16 additions and 6 deletions
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22
engine/prisms.go
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@ -170,11 +170,16 @@ func (p *Prism) DrawAfter(x Drawer) bool {
return true
}
// The hexagon special
if pb.Min.Z+8 <= xb.Min.Z { // x is in front of the front half of p
// The prism special
split := p.m.topext[geom.North].X
threshold := p.m.topext[geom.East].Y
if xb.Min.X > split {
threshold = p.m.topext[geom.West].Y
}
if pb.Min.Z+threshold <= xb.Min.Z { // x is in front of the front half of p
return false
}
if pb.Min.Z+8 >= xb.Max.Z { // x is behind the front half of p
if pb.Min.Z+threshold >= xb.Max.Z { // x is behind the front half of p
return true
}
@ -208,11 +213,16 @@ func (p *Prism) DrawBefore(x Drawer) bool {
if pb.Min.Y >= xb.Max.Y { // p is below x
return true
}
// The hexagon special
if pb.Min.Z+8 >= xb.Max.Z { // x is behind the front half of p
// The prism special
split := p.m.topext[geom.North].X
threshold := p.m.topext[geom.East].Y
if xb.Min.X > split {
threshold = p.m.topext[geom.West].Y
}
if pb.Min.Z+threshold >= xb.Max.Z { // x is behind the front half of p
return false
}
if pb.Min.Z+8 <= xb.Min.Z { // x is in front of the front half of p
if pb.Min.Z+threshold <= xb.Min.Z { // x is in front of the front half of p
return true
}
case zpositioner: