Okay So Im trying to draw a map/level made in mappy nd trying to scroll it. I had no problem doing this in A4 using mappyal.h and mappyal.c. Now im doing it in A5 using mappy_A5.h and mappy_A5.c. Okay heres the code any ways
First my display dimensions
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1#define WIDTH 800
2#define HEIGHT 600
Now here are my map scrolling variables
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1//Camera variables
2int mapxoff = 0, mapyoff = 0;
Okay so now I want my scrolling variables to lock onto my player, so I make a function for it:
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1//Set the camera up and keep it updates
2void UpdateCamera()
3{
4 //Sync the camera with the player position
5 mapxoff = link->x + link->width/2 - WIDTH/2 + 10;
6 mapyoff = link->y + link->height/2 - HEIGHT/2 + 10;
7
8 //avoid making the camera go off screen.
9 //x axis
10 if(mapxoff < 0)
11 mapxoff = 0;
12 if(mapxoff > (mapwidth * mapblockwidth) - WIDTH)
13 mapxoff = (mapwidth * mapblockwidth) - WIDTH;
14 //y axis
15 if(mapyoff < 0)
16 mapyoff = 0;
17 if(mapyoff > (mapheight * mapblockheight) - HEIGHT)
18 mapyoff = (mapheight * mapblockheight) - HEIGHT;
19}
So everything seems so good so far right? K lets get into the main function and load up the map:
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1//Load in the map
2MapLoad("Zelda1.fmp", 1);
Okay now I need to call that function from above in my game loop and get it locked with my character so I do that here inside my "game loop"
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1else if(state
== playing
)
2 {
3 //Play the music
4 al_stop_sample_instance(introInstance
);
5 playSounds
();
6
7 //Life check (test)
8 checkLife
();
9
10 //Update the camera
11 UpdateCamera
();
12 //Check if the player pressed a key
13 //and act accordingly
14 getInput
();
15
16
17 }
K now finally I render the map onto screen in the redering area of the game loop:
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1//What to draw during the playing state
2 else if(state == playing)
3 {
4
5 //Draw the map background
6 MapDrawBG(mapxoff, mapyoff, 0, 150, 800-1, 448-1);
7 //Draw the map foreground
8 MapDrawFG(mapxoff, mapyoff, 0, 150, 800-1, 448-1, 0);
9
10 //Draw Link
11 drawLINK();
12
13 //Draw the status bar
14 drawGUI();
15
16 }
THe problem is that the game immediately crashes right after I enter the playing state and takes me to this area of the mappyA5.h file:
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1
2/* draw the background graphics on the current layer to the target bitmap, usually backbuffer */
3void MapDrawBG
(int mapxo,
int mapyo,
int mapx,
int mapy,
int mapw,
int maph
)
4{
5 int i, j, mycl, mycr, myct, mycb, mapvclip, maphclip
;
6 int mbgx, mbgy
;
7 short int *mymappt
;
8 short int *mymap2pt
;
9 BLKSTR
*blkdatapt
;
10 ANISTR
*myanpt
;
11 ALLEGRO_BITMAP* mapdestpt
;
12
13 mapdestpt
=PushTargetDisplayAndBitmap
(NULL
);
14 al_get_clipping_rectangle(&mycl,
&mycr,
&myct,
&mycb
);
15 al_set_clipping_rectangle(mapx,mapy,mapw,maph
);// set_clip (mapdestpt, mapx, mapy, mapx+mapw-1, mapy+maph-1);
16
17 mapxo
-= mapblockstaggerx
;
18 mapyo
-= mapblockstaggery
;
19 mymappt
= (short int *) mappt
;
20 if (mapblockstaggerx
|| mapblockstaggery
)
21 {
22 mymappt
+= (mapxo
/mapblockgapx
)+((mapyo
/mapblockgapy
)*mapwidth
*2);
23 mbgx
= mapblockgapx
;
24 mbgy
= mapblockgapy
;
25 }
26 else
27 {
28 mymappt
+= (mapxo
/mapblockgapx
)+((mapyo
/mapblockgapy
)*mapwidth
);
29 mbgx
= 0;
30 mbgy
= 0;
31 }
32 mapvclip
= mapyo%mapblockgapy
;
33 maphclip
= mapxo%mapblockgapx
;
34
35 mymap2pt
= mymappt
;
36 for (j
=((mapy-mapvclip
)-mbgy
);j
<((mapy
+maph
));j
+=mapblockgapy
)
37 {
38 for (i
=((mapx-maphclip
)-mbgx
);i
<((mapx
+mapw
));i
+=mapblockgapx
)
39 {
40 if (*mymappt>
=0)
41 blkdatapt
= ((BLKSTR
*) mapblockstrpt
) + *mymappt
;
42 else
43 {
44 myanpt
= mapanimstrendpt
+ *mymappt
;
45 blkdatapt
= ((BLKSTR
*) mapblockstrpt
) + mapanimseqpt
[myanpt->ancuroff
];
46 }
47 if (mapblockstaggerx
|| mapblockstaggery
)
48 {
49 if (abmTiles
[0] != (ALLEGRO_BITMAP *) blkdatapt->bgoff
)
50 //masked_blit ((ALLEGRO_BITMAP *) blkdatapt->bgoff, mapdestpt, 0, 0, i, j, mapblockwidth, mapblockheight);
51 al_draw_bitmap((ALLEGRO_BITMAP *) blkdatapt->bgoff,i,j,
0); //size should be the same
52 }
53 else
54 {
55 al_draw_bitmap_region((ALLEGRO_BITMAP *) blkdatapt->bgoff,
0,
0,mapblockwidth,mapblockheight,i,j,
0); //blit ((BITMAP *) blkdatapt->bgoff, mapdestpt, 0, 0, i, j, mapblockwidth, mapblockheight);
56 }
57 mymappt
++;
58 }
59 if (mapblockstaggerx
|| mapblockstaggery
)
60 {
61 mymap2pt
+= mapwidth
;
62 mymappt
= mymap2pt
;
63 for (i
=(((mapx-maphclip
)-mbgx
)+mapblockstaggerx
);i
<((mapx
+mapw
));i
+=mapblockgapx
)
64 {
65 if (*mymappt>
=0)
66 blkdatapt
= ((BLKSTR
*) mapblockstrpt
) + *mymappt
;
67 else
68 {
69 myanpt
= mapanimstrendpt
+ *mymappt
;
70 blkdatapt
= ((BLKSTR
*) mapblockstrpt
) + mapanimseqpt
[myanpt->ancuroff
];
71 }
72 if (abmTiles
[0] != (ALLEGRO_BITMAP *) blkdatapt->bgoff
)
73 //masked_blit ((ALLEGRO_BITMAP *) blkdatapt->bgoff, mapdestpt, 0, 0, i, j+mapblockstaggery, mapblockwidth, mapblockheight);
74 al_draw_bitmap((ALLEGRO_BITMAP *) blkdatapt->bgoff,i,j
+mapblockstaggery,
0); //size should be the same
75
76 mymappt
++;
77 }
78 }
79 mymap2pt
+= mapwidth
;
80 mymappt
= mymap2pt
;
81 }
82 al_set_clipping_rectangle(mycl,mycr,myct,mycb
);
83 PopTargetDisplayAndBitmap
();
84}
If anyone could help me out that would be wonderful. Im looking at you Neil Walker since you made the mappya5.h/.c files.
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