moonbus: terrain crashing and landing pad winning

moonbus.p8

@@ -4,16 +4,22 @@ __lua__
 -- MoonBus
 -- by Dejvino
 
-plr_alive=1
+plr_alive=true
-plr_pos={x=5,y=20}
+plr_win=false
+plr_pos={x=5,y=8}
 plr_speed={x=0.5,y=0}
 plr_static=false
 plr_engine=-1
 
 gravity=0.02
 engine_power=0.2
+land_speed_limit=1
+maph=8
+cam={}
 
 function _update()
+    debug_points={}
+
     -- controlls
     plr_engine=-1
     if plr_alive then
@@ -41,31 +47,47 @@ function _update()
     end
 
     -- crash detection
-    local pmaps=mget(plr_pos.x,plr_pos.y-1)
+    local pc=plus(plr_pos,{x=0.5,y=-0.5})
-    local solid=fget(pmaps,0)
+    if pc.y <= maph then
-    if solid or plr_pos.y<=0 then
+        for p in all({plus(pc,clearx(unit(plr_speed,0.4))), plus(pc,cleary(unit(plr_speed,0.4)))}) do
-        plr_speed.y*=-0.75
+            local pmaps=mget(p.x,maph-p.y)
-        plr_alive=0
+            local target=fget(pmaps,7)
-        if (dist(plr_speed) > 1) then
+            local solid=fget(pmaps,0)
-            sfx(0)
+            add(debug_points,p)
-        else
+            if target and dist(plr_speed) < land_speed_limit then
-            plr_speed.x=0
+                plr_win=true
-            plr_speed.x=0
+                plr_speed={x=0,y=0}
-            plr_static=true
+                plr_pos={x=flr(plr_pos.x+0.5),y=flr(plr_pos.y+0.5)}
+                break
+            elseif solid or plr_pos.y<=0 then
+                plr_speed.y*=-0.75
+                plr_alive=false
+                if (dist(plr_speed) > 1) then
+                    --sfx(0)
+                else
+                    plr_speed.x=0
+                    plr_speed.y=0
+                    plr_static=true
+                end
+                break
+            end
         end
     end
 
-    camera(plr_pos.x*8-60,-56)
+    cam={x=plr_pos.x*8-60, y=0}
+    camera(cam.x,cam.y)
 end
 
 function _draw()
     cls()
 
-    map()
+    map(0, 0, 0, 128-maph*8)
 
     local px,py=to_scrn(plr_pos)
     local img=0
-    if plr_alive==0 then
+    if plr_win then
+        img=5
+    elseif not plr_alive then
         img=4
     elseif plr_engine==⬆️ then
         img=2
@@ -75,6 +97,14 @@ function _draw()
         img=1
     end
     spr(img,px,py)
+
+    for p in all(debug_points) do
+        local px,py=to_scrn(p)
+        pset(px,py,8)
+    end
+
+    local p=plr_pos
+    print(p.x.." "..p.y, cam.x, cam.y)
 end
 
 function to_scrn(p)
@@ -84,44 +114,99 @@ function to_scrn(p)
 end
 
 function move(p,d,a)
+    a=a or 1
     p.x+=d.x*a
     p.y+=d.y*a
 end
+function plus(p,d,a)
+    a=a or 1
+    return {
+        x=p.x+d.x*a,
+        y=p.y+d.y*a
+    }
+end
+function clearx(p)
+    return {
+        x=0,
+        y=p.y
+    }
+end
+function cleary(p)
+    return {
+        x=p.x,
+        y=0
+    }
+end
+function mul(p,a)
+    return {
+        x=p.x*a,
+        y=p.y*a
+    }
+end
+function neg(p)
+    return mul(p,-1)
+end
 
 function dist(p)
     return abs(p.x) + abs(p.y)
 end
 
+function unit(p,u)
+    u=u or 1
+    local x = 0
+    local y = 0
+    if p.x>0 then x=u end
+    if p.x<0 then x=-u end
+    if p.y>0 then y=u end
+    if p.y<0 then y=-u end
+    return {x=x,y=y}
+end
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