Report

Report/uml/coordinate-pipeline.puml

@@ -0,0 +1,28 @@
+@startuml
+title Конвейер координат: Local -> World -> Canvas -> Buffer
+
+skinparam rectangle {
+  RoundCorner 10
+}
+
+rectangle "Local coords\n(object space)" as L
+rectangle "World coords\n(document space)" as W
+rectangle "Canvas coords\n(scaled document)" as C
+rectangle "Buffer coords\n(visible rect origin)" as B
+
+L --> W : localToWorld()\nrotate + scale + translate
+W --> C : world * scale_x/scale_y
+C --> B : subtract visible_rect.(x,y)
+
+B --> C : + visible_rect.(x,y)
+C --> W : divide by scale_x/scale_y
+W --> L : worldToLocal()\ntranslate^-1 + rotate^-1 + scale^-1
+
+note right of B
+All raster tests are done
+in buffer coords (integer pixels).
+Shape analytics often done
+in local coords after inverse map.
+end note
+
+@enduml