75 lines
2.8 KiB
Haskell
75 lines
2.8 KiB
Haskell
module Dodge.Debug.Picture where
|
|
import Dodge.Data
|
|
import Dodge.Base.Window
|
|
import Dodge.Base.Collide
|
|
import Geometry
|
|
import Picture
|
|
|
|
import Data.Maybe
|
|
--import Color
|
|
|
|
printPoint :: Point2 -> Picture
|
|
printPoint p = color white $ uncurryV translate p $ pictures [circle 3 ,scale 0.05 0.05 $ text (show p)]
|
|
|
|
printRotPoint :: Float -> Point2 -> Picture
|
|
printRotPoint r p = color white
|
|
. uncurryV translate p
|
|
$ pictures [circle 3 , rotate (negate r) $ scale 0.1 0.1 $ text (show p)]
|
|
|
|
outsideScreenPolygon :: Configuration -> World -> [Point2]
|
|
outsideScreenPolygon cfig w = [tr,tl,bl,br]
|
|
where
|
|
scRot = rotateV (_cameraRot w)
|
|
scZoom p | _cameraZoom w /= 0 = (1/_cameraZoom w) *.* p
|
|
| otherwise = error "Trying to set screen zoom to zero"
|
|
scTran p = p +.+ _cameraCenter w
|
|
tr = f 3 3
|
|
tl = f (-3) 3
|
|
br = f 3 (-3)
|
|
bl = f (-3) (-3)
|
|
f a b = scTran $ scRot $ scZoom $ V2 (a*halfWidth cfig) (b* halfHeight cfig)
|
|
|
|
-- cannot only test if walls are on screen, but also if they are on the cone
|
|
-- towards the center of sight
|
|
lineOnScreenCone :: Configuration -> World -> Point2 -> Point2 -> Bool
|
|
lineOnScreenCone cfig w p1 p2 = pointInPolygon p1 sp
|
|
|| pointInPolygon p2 sp
|
|
|| any (isJust . uncurry (intersectSegSeg p1 p2)) sps
|
|
where
|
|
sp' = screenPolygon cfig w
|
|
vp = _cameraViewFrom w
|
|
sp | pointInPolygon vp sp' = sp'
|
|
| otherwise = orderPolygon (_cameraViewFrom w : sp')
|
|
sps = zip sp (tail sp ++ [head sp])
|
|
|
|
pointOnScreen :: Configuration -> World -> Point2 -> Bool
|
|
pointOnScreen cfig w p = pointInPolygon p . reverse $ screenPolygon cfig w
|
|
|
|
drawWallFace :: Configuration -> World -> Wall -> Picture
|
|
drawWallFace cfig w wall
|
|
| isRHS sightFrom x y || not (wlIsOpaque wall) = blank
|
|
| otherwise = setDepth (-1) . color (withAlpha 0 black) . polygon $ points
|
|
where
|
|
(x,y) = _wlLine wall
|
|
points = extendConeToScreenEdge cfig w sightFrom (x,y)
|
|
sightFrom = _cameraViewFrom w
|
|
|
|
extendConeToScreenEdge :: Configuration -> World -> Point2 -> (Point2,Point2) -> [Point2]
|
|
extendConeToScreenEdge cfig w c (x,y) = orderPolygon $ wallScreenIntersect ++ [x,y] ++ borderPs ++ cornerPs
|
|
where
|
|
borderPs = mapMaybe (intersectLinefromScreen cfig w c) [x,y]
|
|
scpoly = screenPolygon cfig w
|
|
cornerPs = filter (pointIsInCone c (x,y)) scpoly
|
|
wallScreenIntersect = mapMaybe (uncurry $ intersectSegSeg y ((2*.*y) -.- x))
|
|
. loopPairs $ scpoly
|
|
|
|
-- the following assumes that the point a is inside the screen
|
|
-- it still works otherwise, but it might intersect two points:
|
|
-- it is not obvious which will be returned
|
|
intersectLinefromScreen :: Configuration -> World -> Point2 -> Point2 -> Maybe Point2
|
|
intersectLinefromScreen cfig w a b = listToMaybe
|
|
. mapMaybe (\(x,y) -> intersectSegLineFrom x y b (b +.+ b -.- a))
|
|
. loopPairs
|
|
$ screenPolygon cfig w
|
|
|