Fix chunk/pixel alignment

- Adjust coordinates, so that chunks are always in the center of the window
- Modify VIRTUAL_RESOLUTION_OFFSET_X/Y to match window output with expected coordinates
- Fix black line at the bottom of window
- Remove tile bleed/inset while stitching, as it is not needed anymore

bin/stitch/imagetiles.go

@@ -81,10 +81,8 @@ func Stitch(tiles []imageTile, destImage *image.RGBA) error {
 				return fmt.Errorf("Couldn't get image: %w", err)
 			}
 			imgCopy := *img
-			imgCopy.Rect = imgCopy.Rect.Add(tile.offset).Inset(4) // Reduce image bounds by 4 pixels on each side, because otherwise there will be artifacts.
+			imgCopy.Rect = imgCopy.Rect.Add(tile.offset)
 			images = append(images, &imgCopy)
-			// TODO: Fix transparent pixels at the output image border because of inset
-			// TODO: Fix downscaled images to cause artifacts because of the inset
 		}
 	}
 
@@ -225,7 +223,7 @@ func Compare(tiles []imageTile, bounds image.Rectangle) error {
 				return fmt.Errorf("Couldn't get image: %w", err)
 			}
 			imgCopy := *img
-			imgCopy.Rect = imgCopy.Rect.Add(tile.offset).Inset(4) // Reduce image bounds by 4 pixels on each side, because otherwise there will be artifacts.
+			imgCopy.Rect = imgCopy.Rect.Add(tile.offset)
 			images = append(images, &imgCopy)
 		}
 	}

files/capture.lua

@@ -4,7 +4,7 @@
 -- https://opensource.org/licenses/MIT
 
 CAPTURE_PIXEL_SIZE = 1 -- Screen to virtual pixel ratio
-CAPTURE_GRID_SIZE = 420 -- in ingame pixels. There will always be 3 to 6 images overlapping
+CAPTURE_GRID_SIZE = 512 -- in ingame pixels. There will always be exactly 4 images overlapping if the virtual resolution is 1024x1024
 CAPTURE_FORCE_HP = 4 -- * 25HP
 
 CAPTURE_LEFT = -25000 -- in ingame pixels. Left edge of the full map capture rectangle
@@ -38,7 +38,7 @@ local function captureScreenshot(x, y, rx, ry)
 	repeat
 		if UiCaptureDelay > 100 then
 			-- Wiggle the screen a bit, as chunks sometimes don't want to load
-			GameSetCameraPos(x+math.random(-100, 100), y+math.random(-100, 100))
+			GameSetCameraPos(x + math.random(-100, 100), y + math.random(-100, 100))
 			DrawUI()
 			wait(0)
 			UiCaptureDelay = UiCaptureDelay + 1
@@ -48,7 +48,6 @@ local function captureScreenshot(x, y, rx, ry)
 		DrawUI()
 		wait(0)
 		UiCaptureDelay = UiCaptureDelay + 1
-
 	until DoesWorldExistAt(xMin, yMin, xMax, yMax) -- Chunks will be drawn on the *next* frame
 
 	wait(0) -- Without this line empty chunks may still appear, also it's needed for the UI to disappear
@@ -63,6 +62,7 @@ end
 function startCapturingSpiral()
 	local ox, oy = GameGetCameraPos()
 	ox, oy = math.floor(ox / CAPTURE_GRID_SIZE) * CAPTURE_GRID_SIZE, math.floor(oy / CAPTURE_GRID_SIZE) * CAPTURE_GRID_SIZE
+	ox, oy = ox + 256, oy + 256 -- Align screen with ingame chunk grid that is 512x512
 	local x, y = ox, oy
 
 	local virtualWidth, virtualHeight =
@@ -156,6 +156,7 @@ function startCapturingHilbert()
 				local hx, hy = mapHilbert(t, gridPOTSize)
 				if hx < gridWidth and hy < gridHeight then
 					local x, y = (hx + gridLeft) * CAPTURE_GRID_SIZE, (hy + gridTop) * CAPTURE_GRID_SIZE
+					x, y = x + 256, y + 256 -- Align screen with ingame chunk grid that is 512x512
 					local rx, ry = x * CAPTURE_PIXEL_SIZE - virtualHalfWidth, y * CAPTURE_PIXEL_SIZE - virtualHalfHeight
 					if not fileExists(string.format("mods/noita-mapcap/output/%d,%d.png", rx, ry)) then
 						captureScreenshot(x, y, rx, ry)

files/magic_numbers.xml

@@ -1,5 +1,7 @@
 <MagicNumbers VIRTUAL_RESOLUTION_X="1280" 
 	VIRTUAL_RESOLUTION_Y="720" 
+	VIRTUAL_RESOLUTION_OFFSET_X="-2" 
+	VIRTUAL_RESOLUTION_OFFSET_Y="0" 
 	DRAW_PARALLAX_BACKGROUND="0" 
 	DEBUG_FREE_CAMERA_SPEED="10" 
 	DEBUG_NO_LOGO_SPLASHES="1"