Super Drift Racer!!- WIP

[monkeybot]

ahhh i see

[kevin]

 Here's top-down height map a mock up, there's a few errors in it, but basically it shows the concept.   You wouldn't actually need to draw the ground as triangles, provided the camera never moves on the Z axis.   When the foreground occludes the map, just cull the blocks . 

PlayBASIC Code: [Select]

   Constant ProjectionX = 400
   Constant ProjectionY = 400


   Type tTerrainVertex
            x#,y#,Z      ; 3d SPACE CORD
            px#,py#      ; project 2d coord
            Col
            Flat         ; ground tile ? (drawn in first pass)
   EndType 



   groundheight=1500

   GridSize=30
   Dim Terrain(GridSize,GridSize) as tTerrainVertex
   
   For ylp =0 to GridSIze
      For xlp =0 to GridSize
            Terrain(xlp,ylp) =new  tTerrainVertex
            Terrain(xlp,ylp).x = (xlp*400) 
            Terrain(xlp,ylp).y = (ylp*400)

            DIST#=getdistance2d(0,0,gridsize/2,gridsize/2)

            Terrain(xlp,ylp).z = 1500
            Terrain(xlp,ylp).flat = 1
            
            Terrain(xlp,ylp).col=rndrgb()
      next   
   next


   for lp =0 to 30
         x=rnd(gridSize-2)
         y=rnd(gridSize-2)
         depth=GroundHeight-rndrange(100,300)
         Terrain(x,y).z = depth
         Terrain(x+1,y).z = depth
         Terrain(x+1,y+1).z = depth
         Terrain(x,y+1).z = depth

         Terrain(x,y).flat = 0
         Terrain(x+1,y).flat = 0
         Terrain(x+1,y+1).flat = 0
         Terrain(x,y+1).flat = 0
         
   next



   ; Clip the Camera 
      Xrange=8000
      YRange=8000
 
        CamX=00
       CamY=00
       CamZ=-ProjectionX
    
    
    StartPass=1
    
    
          c1=$205020
;         c2=$605020
         c3=$406020
         c4=$40300
         
    
   Do

         cls $406080
      
      // project /rotate points
         For ylp =0 to GridSIze
            For xlp =0 to GridSize
      
               z#=Terrain(xlp,ylp).z-CamZ

             ; Check if the Object is in front of the camera (positive)
               If Z#>0
   
                   ; Translate the X# / Y# cooords object To the camera
                     x#=Terrain(xlp,ylp).x-CamX
                     y#=Terrain(xlp,ylp).y-Camy

                  ; Calc projected X /Y coords
                     PX#=CameraCenterX#+((x#*ProjectionX)/Z#)
                     PY#=CameraCenterY#+((y#*ProjectionY)/Z#)
   
                     Terrain(xlp,ylp).px#=px#
                     Terrain(xlp,ylp).py#=py#
   
               EndIf
   

            next   
         next


         lockbuffer




      // project /rotate points
         For Pass=0 to 1
            For ylp =0 to GridSIze-1 
               For xlp =0 to GridSize-1 

                  x1#=Terrain(xlp,ylp).px#
                  y1#=Terrain(xlp,ylp).py#
                  
                  x2#=Terrain(xlp+1,ylp).px#
                  y2#=Terrain(xlp+1,ylp).py#

                  x3#=Terrain(xlp+1,ylp+1).px#
                  y3#=Terrain(xlp+1,ylp+1).py#

                  x4#=Terrain(xlp,ylp+1).px#
                  y4#=Terrain(xlp,ylp+1).py#
   


                  if Terrain(xlp,ylp).Flat=Pass then continue
   

                  if crossproduct#(x1#,y1#,x2#,y2#,x3#,y3#)>=0
                        gouraudtri x1#,y1#,c1,x2#,y2#,c2,x3#,y3#,c3
                  endif
                        
                  if crossproduct#(x1#,y1#,x3#,y3#,x4#,y4#)>=0
                        gouraudtri x1#,y1#,c1,x3#,y3#,c3,x4#,y4#,c4
                  endif
         
               next   
            next
         next
         unlockbuffer
   
      StartPass=2

   ; Move the camera   
        Speed=10

       If UpKey() Then Camy=Camy+-Speed   

Login required to view complete source code

[stevmjon]

hey monkey dude

I was in the mood to make some graphics for you in my 3D program.
they are individual pics, that need to be cut up and made into a map image. I made them divisible by 64 pixels.

also, you don't need to make as many tiles as you did. use the ones with black as transparent, and you can paste these on top of dirt / road tiles. this is where z buffer comes in handy.  eg. use all grass tiles on z layer 5, use road / dirt tiles on z layer 10. this way you will use less tiles.

I like this game, and i am looking forward to seeing more.

hope this helps,  stevmjon

[monkeybot]

Thanks chaps.i will check these things out.

[monkeybot]

what does  crossproduct#() do?
i can't find it in the docs

[kevin]

 It's for working out what direction a polygon is facing. 

http://www.underwaredesign.com/forums/index.php?topic=3988.msg27424#msg27424

[monkeybot]

thanks,i see you are using it for shading purposes(i think)

[monkeybot]

i have a problem,if i use the basic tile set in my game(via playmapper) the game runs fine but if i use the posh tileset the collision is constantly being triggered  which is level 3 on the map.
it is almost definitely  user error,it generally is...

[stevmjon]

hey monkeybot

how are you defining collisions? are you using shapes colliding with a map? or are you manually checking collisions?

if you could post your source code with the images in a zip file, it would be handy. I understand that some people don't like to share their code, but it would be helpful to determine the issue.

  stevmjon

[monkeybot]

i am checking points against the map

[stevmjon]

hey monkeybot

I re-made the map image for you, as one instead of individually. the older ones were all 24bit, but this new one is 32bit. this allows loading as AFX images to be used for an AFX map.

I adjusted the dirt and road tiles to show more detail, and I removed the specular highlights from the grass, so there are no bright spots anymore. the tiles on the right hand side are to roughen up the grass edges.
remember to use levels(layers). put grass on top, and put dirt and road underneath.

because the tiles are different, you will need to modify your map tile numbers for placement. sorry about that. you can at least use less tiles with mine.

hope you like it, if you need any adjustments, let me know. my 3D scene is set-up and I can easily adjust individual tiles.

  stevmjon

[monkeybot]

Hey nice one they look great.
I will get round to it as soon as possible.
Thanks again

[micky4fun]

Hi all

looking good monkeybot , reminds me of auto racing on the intellivision , loved that game , thought this was such a good system , football (soccer) at the time looked so real the way they run , how things changed

https://www.youtube.com/watch?v=kWaUCaRAioQ

keep up the good work , look forward to complete game

mick :)

[monkeybot]

nice.

I knew you couldn't stay away mick.  :-)

[kevin]

Reminds me those sprint/supersprint arcades from the late 70's

Was thinking that for the track what you could look into making them out of polygons.    So in the designer you have mutliple layers, such as ground layer, track layer, then a foreground stuff layer.   The ground and track would be merged together and spat out as a tile map or just a big bitmap.