Collision system added, cam needs work

continuum.p8

@@ -31,6 +31,7 @@ end
 --<<<=======init========>>>
 function _init()
   _init_rain()
+  make_player()
   sx = 0 sy = 13 
   px = 28 py = 28
   sun = {}
@@ -61,14 +62,21 @@ function _init()
 
   confirm_trigger=false
   cancel_trigger=false
+  
+  camx=0
+  camy=0
 end
 --<<<=====update======>>>
 function _update()
+  camx = peek2(0x5f28)
+  camy = peek2(0x5f2a)
+
   if (crossbar==false) then
-    if (btn(0)) then plyr.x=plyr.x-1 plyani.f1=34 plyani.f2=35 plyr.flp=true plyr.ymov=false end --⬅️
-    if (btn(1)) then plyr.x=plyr.x+1 plyani.f1=34 plyani.f2=35 plyr.flp=false plyr.ymov=false end --➡️
-    if (btn(2)) then plyr.y=plyr.y-1 plyani.f1=36 plyani.f2=36 plyr.flp=false plyr.ymov=true end --⬆️
-    if (btn(3)) then plyr.y=plyr.y+1 plyani.f1=33 plyani.f2=33 plyr.flp=false plyr.ymov=true end --⬇️
+    move_player()
+    --if (btn(0)) then plyr.x=plyr.x-1 plyani.f1=34 plyani.f2=35 plyr.flp=true plyr.ymov=false end --⬅️
+    --if (btn(1)) then plyr.x=plyr.x+1 plyani.f1=34 plyani.f2=35 plyr.flp=false plyr.ymov=false end --➡️
+    --if (btn(2)) then plyr.y=plyr.y-1 plyani.f1=36 plyani.f2=36 plyr.flp=false plyr.ymov=true end --⬆️
+    --if (btn(3)) then plyr.y=plyr.y+1 plyani.f1=33 plyani.f2=33 plyr.flp=false plyr.ymov=true end --⬇️
     end
   if crossbar then
     if (crossbarnum==0) then
@@ -107,6 +115,8 @@ end
 function _draw()
   cls()
   pal()
+--center camera on player  
+  camera_follow()
 --do the shaking
   doshake()  
 --sky
@@ -116,7 +126,10 @@ function _draw()
 --map
   rectfill(0,17,64,64,4)
   map(0,0,0,12,33,18)
-  spr(plyr.sprt,plyr.x,plyr.y,1,1,plyr.flp)
+--player
+  spr(p.sprt,p.x,p.y)
+--  spr(plyr.sprt,plyr.x,plyr.y,1,1,plyr.flp)
+--celestial bodies
   sun.tmr = sun.tmr+1
   if sun.tmr>=320 then --64
     sun.x = 0
@@ -193,6 +206,8 @@ function _draw()
   line(21,2,30,2,8)
   spr(50,32,0)
   line(37,2,46,2,12)
+  print(camx,48,0,10)
+  print(camy,56,0,11)
 end
 
 function doshake()
@@ -267,6 +282,113 @@ function _draw_rain()
    end
   end
 end
+-->8
+--player functions
+
+function make_player()
+  p={}
+  p.x=28
+  p.y=28
+  p.dx=0
+  p.dy=0
+  p.w=7
+  p.h=7
+  p.sprt=32
+end
+
+function move_player()
+        if (btn(⬅️)) p.dx-=1
+        if (btn(➡️)) p.dx+=1
+        if (btn(⬆️)) p.dy-=1
+        if (btn(⬇️)) p.dy+=1
+
+ if (can_move(p.x+p.dx,p.y,p.w,p.h)) then
+         p.x+=p.dx
+ end 
+ 
+ if (can_move(p.x,p.y+p.dy,p.w,p.h)) then
+         p.y+=p.dy
+ end 
+
+        p.dx,p.dy=0,0
+end
+-->8
+--collision functions
+function can_move(x,y,w,h)    
+ if (solid(x,y-12)) return false
+ if (solid(x+w,y-12)) return false
+ if (solid(x,y+h-12)) return false
+ if (solid(x+w,y+h-12)) return false
+ return true
+end
+
+function solid(x,y)
+ local map_x=flr(x/8)
+ local map_y=flr(y/8)
+ local map_sprite=mget(map_x,map_y)
+ local flag=fget(map_sprite)
+ return flag==1
+end
+-->8
+--camera follow functions
+
+--this function will move the 
+--camera to always put the 
+--player at the center.
+function camera_follow()
+
+ --the camera shows 128 pixels
+ --across and 128 pixels down.
+ --by default, the pixels it
+ --shows start at coordinate
+ --0,0 and go to 127,127. this
+ --is why pixel coordinate 8,4
+ --would also show up the screen
+ --at coordinate 8,4.
+
+ --you can change which block of
+ --pixels are shown with the
+ --camera() function. by giving
+ --the camera() function a new
+ --x,y coordinate, you can
+ --tell the camera to start
+ --drawing from that new
+ --coordinate instead. if you
+ --used camera(100,100) then the
+ --camera would draw the pixel
+ --at 100,100 to the screen
+ --coordinate 0,0. this means
+ --that pset(108,104,1) would
+ --draw a pixel at screen
+ --coordinate 8,4.
+
+ --since the camera position is
+ --where the top-left corner of
+ --the screen is, if we want to
+ --keep the player in the middle
+ --of the screen, we need to
+ --set the camera's x,y to the
+ --player's x,y minus 60.
+ cam_x=p.x-28
+ cam_y=p.y-28
+ 
+ --if the player is on the
+ --edge of the map, keeping
+ --player centered means you'll
+ --see past the edge of the map.
+ --we can use the mid() function
+ --to make sure the camera
+ --position can't move past
+ --coordinates that would show
+ --past the edge of the map.
+ cam_x=mid(0,cam_x,896)
+ cam_y=mid(0,cam_y,128)
+
+ --change the camera position
+ camera(cam_x,cam_y)
+
+end
+
 __gfx__
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@@ -297,11 +419,14 @@ __gfx__
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+__gff__
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 __map__
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