Add hitbox, tidy up, options to change display modes. Sprite optimisation.

!TheEscape/!RunImage,ffb.bas

@@ -1,3 +1,6 @@
+SCREENMODE%=32
+SCREENGFXWIDTH%=1600
+SCREENGFXHEIGHT%=1200
 
 PROC_main
 END
@@ -7,12 +10,14 @@ DEF PROC_main
   DIM Scr% 0
 
   DIM PlayerLocation%(1)
-  PlayerLocation%(0) = 800
+  PlayerLocation%(0) = SCREENGFXWIDTH%/2
   PlayerLocation%(1) = 100
-  PlayerVelocity%=1
+  PlayerVelocity%=0
   PlayerShields%=100
   PlayerStructuralIntegrity%=100
-  XMovePerCent%=10
+  DIM PlayerHitbox%(3)
+  PlayerHitbox%() = 0,0,60,81
+  XMovePerCent%=5
   ResetShipSprite% = 0
 
   REM Show/hide debug display
@@ -20,15 +25,17 @@ DEF PROC_main
 
   DIM SpecLocations%(1,49)
   FOR Spec%=0 TO 49
-    SpecLocations%(0,Spec%) = RND(1600)
-    SpecLocations%(1,Spec%) = RND(1200)
+    SpecLocations%(0,Spec%) = RND(SCREENGFXWIDTH%)
+    SpecLocations%(1,Spec%) = RND(SCREENGFXHEIGHT%)
   NEXT Spec%
 
   REM Used for centiseconds per frame calcs
   Cents% = TIME
 
-  REM 800x600x256 GFX Area 1600x1200
-  MODE 32
+  MODE SCREENMODE%
+
+  REM Position text cursor at graphics location
+  VDU 5
 
   REM Sprite set
   sprite_area% = FNload_sprites("Spr")
@@ -43,23 +50,21 @@ DEF PROC_main
 
     CLS
 
+    REM Space dust / stars
     FOR Spec%=0 TO 49
       GCOL 0,0
       LINE SpecLocations%(0,Spec%),SpecLocations%(1,Spec%),SpecLocations%(0,Spec%),SpecLocations%(1,Spec%)
       SpecLocations%(1,Spec%) = SpecLocations%(1,Spec%) - ((Cents% - LastCents%) * PlayerVelocity%/10)
       IF SpecLocations%(1,Spec%) < 0 THEN
-        SpecLocations%(1,Spec%) = 1200
-        SpecLocations%(0,Spec%) = RND(1600)
+        SpecLocations%(1,Spec%) = SCREENGFXHEIGHT%
+        SpecLocations%(0,Spec%) = RND(SCREENGFXWIDTH%)
       ENDIF
     NEXT Spec%
 
     REM Draw LCARS in top left
-    PROCdraw_sprite("lcars",0,940)
-
-    IF DebugOut% = 1 THEN
-      PROCdebugoutput
-    ENDIF
+    PROCdraw_sprite("lcars",4,SCREENGFXHEIGHT%-180)
 
+    REM If using l/r sprites we debounce to stop it looking twitchy
     IF Cents% > ResetShipSprite% THEN
       ShipSprite$ = "player_ship"
     ENDIF
@@ -67,9 +72,7 @@ DEF PROC_main
     REM Handle Key inputs
     PROCinputs
 
-    REM Use graphics cursor for text (TODO: Is this needed in loop?_)
-    VDU 5
-
+    REM Attribute names
     GCOL 0,0
     MOVE 75,1150
     PRINT "Sheilds"
@@ -78,6 +81,7 @@ DEF PROC_main
     MOVE 75,1090
     PRINT "Velocity"
 
+    REM Attribute values
     GCOL 0,7
     MOVE 130,1150
     PRINT PlayerShields%
@@ -89,6 +93,10 @@ DEF PROC_main
     REM Draw player ship
     PROCdraw_sprite(ShipSprite$,PlayerLocation%(0),PlayerLocation%(1))
 
+    IF DebugOut% = 1 THEN
+      PROCdebugoutput
+    ENDIF
+
     REM Wait for rendering to complete
     WAIT
 
@@ -137,6 +145,7 @@ DEF PROCdebugoutput
   MOVE 0,500
   PRINT "X:   " + STR$(PlayerLocation%(0)) " Y: " STR$(PlayerLocation%(1))
   PRINT "CPF: " + STR$(Cents% - LastCents%)
+  RECT PlayerLocation%(0) + PlayerHitbox%(0), PlayerLocation%(1) + PlayerHitbox%(1), PlayerHitbox%(2), PlayerHitbox%(3)
 ENDPROC
 
 REM Delay routine - thanks Sophie

README.md

@@ -1,4 +1,18 @@
 # TheEscape
 RiscOS Game
 
-Totally not at all based on Star Trek. All files are in RiscOS format, with the exception of .BAS files which are plain text conversions of the tokenised BASIC files for easy diffing
+Totally not at all based on Star Trek.
+
+All files are in RiscOS format, with the exception of .BAS files which are plain text conversions of the tokenised BASIC files for easy diffing at GitHub.
+
+Tested on RPCEmu emulating a Risc PC - StrongARM with 32MB of RAM.
+
+Controls so far:
+
+Left Arrow: Left
+Right Arrow: Right
+Up Arrow: Incrase velocity
+Right Arrow: Decrease velocity
+Q: Display debug info
+
+This was written as a BASIC re-learning exercise - any or all of this could have been implemented the wrong way.