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chadderack · 01 October 2021, 16:35

Quote:

Originally Posted by DanScott

Strictly speaking it is a true 8 way scroller... just that the Y scrolling is locked under certain conditions.... play a later level where you can jump down a screen or more at a time (the level with the big stained glass windows, where the pink ninjas first appear, for example)

This is true... Y scroll is locked in that way... but doesn't seem to be under direct player control like a game where you can switch diagonal directions every frame. Not sure if that helps implementation any.

Quote:

Originally Posted by Jobbo

Yeah, there doesn't seem to be anything about the scrolling that you can take advantage of for optimization or simplification. You'll need a generic 8-way capable set up for this game.

Georg's scrolling tricks mentions that if you can switch directions only after (tile pixel width/height) it becomes simpler. In Black Tiger, Y scroll won't change directions in the middle of a 16-bit move. You're probably right, though.

I just ran a script that read the tiles for each level, their palette index and then each of the pixel indexes to count unique colors per level and per tile per level. Full results will be in a new file in my source/docs directory. Level (only) data was this (the codes are RGB444) (and this is just for the full maps. Haven't talked about sprites(Black Tiger objects including player and enemies) yet):

Code:

Level 1 (map) unique colors used: 121
0x000,0x035,0x040,0x046,0x050,0x060,0x064,0x086,0x090,0x0A7,0x0C9,0x0E0,0x110,0x111,0x146,0x257,0x340,0x345,0x368,0x430,0x431,0x433,0x435,0x440,0x450,0x455,0x456,0x479,0x533,0x540,0x544,0x554,0x556,0x560,0x566,0x567,0x58A,0x600,0x640,0x641,0x644,0x650,0x653,0x665,0x666,0x670,0x678,0x747,0x750,0x753,0x754,0x763,0x776,0x777,0x778,0x780,0x789,0x7EC,0x842,0x853,0x857,0x864,0x868,0x874,0x887,0x889,0x899,0x89C,0x900,0x940,0x974,0x975,0x985,0x986,0x990,0x998,0xA53,0xA64,0xA74,0xA75,0xA8A,0xA96,0xA97,0xAA0,0xAAA,0xABC,0xAFD,0xB5A,0xB75,0xB87,0xBA7,0xC64,0xC75,0xC84,0xC85,0xC86,0xC95,0xCA8,0xCAC,0xCB8,0xCC0,0xCCA,0xD86,0xDA6,0xDB8,0xDE0,0xE70,0xE98,0xEA7,0xEC7,0xED8,0xEEA,0xEEF,0xEF0,0xF85,0xFB9,0xFC4,0xFC8,0xFF9,0xFFA,0xFFF

Level 2 (map) unique colors used: 110
0x000,0x035,0x040,0x046,0x050,0x060,0x064,0x086,0x090,0x0A7,0x0C9,0x0E0,0x110,0x111,0x146,0x257,0x340,0x345,0x368,0x430,0x431,0x433,0x440,0x450,0x455,0x456,0x479,0x533,0x540,0x544,0x554,0x556,0x560,0x566,0x567,0x58A,0x600,0x641,0x644,0x650,0x653,0x665,0x666,0x670,0x678,0x747,0x750,0x753,0x754,0x763,0x776,0x777,0x778,0x780,0x789,0x7EC,0x842,0x864,0x868,0x874,0x887,0x889,0x899,0x89C,0x900,0x940,0x974,0x975,0x985,0x986,0x990,0x998,0xA53,0xA74,0xA75,0xA8A,0xA96,0xA97,0xAA0,0xAAA,0xABC,0xAFD,0xB87,0xBA7,0xC64,0xC84,0xC85,0xC86,0xC95,0xCA8,0xCAC,0xCB8,0xCC0,0xCCA,0xDA6,0xDB8,0xDE0,0xE70,0xEA7,0xEC7,0xED8,0xEEA,0xEEF,0xEF0,0xF85,0xFC4,0xFC8,0xFF9,0xFFA,0xFFF

Level 3 (map) unique colors used: 109
0x000,0x040,0x046,0x050,0x060,0x064,0x086,0x090,0x0A7,0x0C9,0x0E0,0x110,0x111,0x340,0x345,0x430,0x431,0x433,0x435,0x440,0x450,0x455,0x456,0x533,0x540,0x544,0x554,0x556,0x560,0x567,0x600,0x640,0x641,0x644,0x650,0x653,0x666,0x670,0x678,0x700,0x747,0x750,0x753,0x754,0x763,0x777,0x778,0x780,0x789,0x7EC,0x842,0x853,0x857,0x864,0x868,0x874,0x889,0x89C,0x900,0x940,0x974,0x975,0x985,0x986,0x990,0x998,0xA53,0xA64,0xA74,0xA8A,0xA96,0xA97,0xAA0,0xAAA,0xAFD,0xB5A,0xB75,0xB87,0xBA7,0xC64,0xC70,0xC75,0xC84,0xC85,0xC95,0xCA8,0xCAC,0xCB8,0xCC0,0xCCA,0xD86,0xD90,0xDA6,0xDB8,0xDD0,0xDE0,0xE70,0xE98,0xEC7,0xED8,0xEEA,0xEEF,0xEF0,0xF85,0xFB9,0xFC4,0xFF9,0xFFA,0xFFF

Level 4 (map) unique colors used: 100
0x000,0x035,0x040,0x046,0x050,0x064,0x086,0x0A7,0x0C9,0x110,0x111,0x146,0x257,0x340,0x345,0x430,0x431,0x433,0x435,0x440,0x450,0x456,0x520,0x533,0x540,0x560,0x566,0x567,0x640,0x641,0x650,0x665,0x666,0x670,0x678,0x700,0x730,0x750,0x753,0x763,0x776,0x780,0x789,0x7EC,0x842,0x853,0x857,0x864,0x874,0x887,0x899,0x89C,0x900,0x940,0x974,0x985,0x986,0x990,0x998,0xA53,0xA64,0xA74,0xA75,0xA96,0xA97,0xAA0,0xAAA,0xAFD,0xB50,0xB5A,0xB75,0xB87,0xBA7,0xC64,0xC70,0xC75,0xC84,0xC85,0xC86,0xCB8,0xCC0,0xCCA,0xD60,0xD86,0xD90,0xDA6,0xDB8,0xDD0,0xDE0,0xE70,0xE98,0xEA7,0xEC7,0xEEF,0xEF0,0xF80,0xFB9,0xFC8,0xFF9,0xFFA

Level 5 (map) unique colors used: 99
0x000,0x035,0x040,0x046,0x110,0x111,0x340,0x345,0x430,0x433,0x435,0x440,0x450,0x455,0x456,0x520,0x533,0x540,0x544,0x554,0x556,0x560,0x566,0x567,0x600,0x640,0x641,0x644,0x650,0x665,0x666,0x670,0x678,0x730,0x747,0x750,0x753,0x754,0x763,0x776,0x778,0x789,0x842,0x853,0x864,0x868,0x874,0x887,0x889,0x899,0x89C,0x900,0x940,0x974,0x975,0x985,0x986,0x990,0x998,0xA53,0xA64,0xA74,0xA75,0xA8A,0xA96,0xA97,0xAAA,0xB50,0xB75,0xB87,0xBA7,0xC64,0xC75,0xC84,0xC85,0xC86,0xC95,0xCA8,0xCAC,0xCB8,0xCCA,0xD60,0xD86,0xDA6,0xDB8,0xDD0,0xE70,0xE98,0xEA7,0xEC7,0xEEA,0xEEF,0xF80,0xF85,0xFB9,0xFC4,0xFC8,0xFF9,0xFFA

Level 6 (map) unique colors used: 101
0x000,0x035,0x040,0x046,0x050,0x060,0x064,0x086,0x090,0x0A7,0x0C9,0x0E0,0x110,0x111,0x146,0x257,0x340,0x345,0x430,0x433,0x435,0x440,0x456,0x520,0x540,0x554,0x560,0x566,0x567,0x640,0x641,0x644,0x650,0x665,0x666,0x678,0x700,0x730,0x747,0x750,0x753,0x754,0x763,0x776,0x777,0x789,0x7EC,0x842,0x853,0x864,0x868,0x874,0x887,0x89C,0x900,0x940,0x974,0x975,0x985,0x986,0x998,0xA53,0xA64,0xA74,0xA75,0xA8A,0xA96,0xA97,0xAAA,0xABC,0xAFD,0xB50,0xB87,0xBA7,0xC64,0xC70,0xC75,0xC85,0xC86,0xC95,0xCA8,0xCAC,0xCB8,0xCCA,0xD60,0xD86,0xD90,0xDA6,0xDB8,0xDD0,0xE70,0xE98,0xEA7,0xEC7,0xED8,0xF80,0xF85,0xFB9,0xFC8,0xFFA,0xFFF

Level 7 (map) unique colors used: 107
0x000,0x035,0x046,0x060,0x090,0x0E0,0x110,0x111,0x146,0x257,0x340,0x345,0x368,0x430,0x431,0x433,0x435,0x450,0x455,0x456,0x479,0x533,0x540,0x544,0x556,0x560,0x566,0x567,0x58A,0x600,0x640,0x641,0x644,0x650,0x653,0x665,0x666,0x670,0x678,0x700,0x747,0x750,0x753,0x754,0x763,0x776,0x777,0x778,0x780,0x789,0x842,0x857,0x864,0x868,0x874,0x887,0x889,0x899,0x89C,0x900,0x940,0x974,0x975,0x985,0x986,0x990,0x998,0xA53,0xA74,0xA75,0xA8A,0xA96,0xA97,0xAAA,0xABC,0xB5A,0xB75,0xB87,0xBA7,0xC64,0xC70,0xC84,0xC85,0xC86,0xC95,0xCA8,0xCAC,0xCB8,0xCC0,0xCCA,0xDA6,0xDB8,0xDD0,0xDE0,0xE70,0xEA7,0xEC7,0xED8,0xEEA,0xEEF,0xEF0,0xF85,0xFC4,0xFC8,0xFF9,0xFFA,0xFFF

Level 8 (map) unique colors used: 98
0x000,0x035,0x040,0x046,0x050,0x064,0x086,0x0A7,0x0C9,0x110,0x111,0x146,0x257,0x340,0x368,0x431,0x433,0x435,0x450,0x455,0x479,0x520,0x533,0x540,0x554,0x560,0x566,0x567,0x58A,0x600,0x640,0x641,0x650,0x665,0x666,0x670,0x678,0x700,0x730,0x750,0x753,0x754,0x763,0x776,0x780,0x789,0x7EC,0x842,0x853,0x857,0x864,0x874,0x887,0x899,0x89C,0x900,0x940,0x974,0x985,0x986,0x990,0x998,0xA53,0xA64,0xA74,0xA75,0xA96,0xA97,0xAA0,0xAAA,0xABC,0xAFD,0xB50,0xB5A,0xB75,0xB87,0xBA7,0xC64,0xC75,0xC85,0xC86,0xCB8,0xCC0,0xCCA,0xD86,0xDA6,0xDB8,0xDE0,0xE70,0xE98,0xEA7,0xEC7,0xEF0,0xF85,0xFB9,0xFC8,0xFF9,0xFFA

ETA: A sample... just the first row of tiles from Level 1.

Code:

TILES:
Row 1: 
  000    0x0210     ; Colors: 4 - 111,431,533,641
  001    0x0211     ; Colors: 5 - 431,533,641,753,864
  002    0x0212     ; Colors: 5 - 641,753,864,A74,C85
  003    0x0213     ; Colors: 6 - 641,753,864,A74,C85,DA6
  004    0x0228     ; Colors: 6 - 753,864,A74,C85,DA6,EC7
  005    0x0229     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  006    0x022A     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  007    0x022B     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  008    0x0228     ; Colors: 6 - 753,864,A74,C85,DA6,EC7
  009    0x0229     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  010    0x022A     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  011    0x022B     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  012    0x0228     ; Colors: 6 - 753,864,A74,C85,DA6,EC7
  013    0x0229     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  014    0x022A     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  015    0x022B     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  016    0x0218     ; Colors: 4 - 111,431,533,641
  017    0x0219     ; Colors: 5 - 431,533,641,753,864
  018    0x021A     ; Colors: 5 - 641,753,864,A74,C85
  019    0x021B     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  020    0x021C     ; Colors: 5 - 753,864,A74,C85,DA6
  021    0x021D     ; Colors: 5 - 641,753,864,A74,C85
  022    0x021E     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  023    0x021F     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  024    0x021C     ; Colors: 5 - 753,864,A74,C85,DA6
  025    0x021D     ; Colors: 5 - 641,753,864,A74,C85
  026    0x021E     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  027    0x021F     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  028    0x021C     ; Colors: 5 - 753,864,A74,C85,DA6
  029    0x021D     ; Colors: 5 - 641,753,864,A74,C85
  030    0x021E     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  031    0x021F     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  032    0x0208     ; Colors: 4 - 111,431,533,641
  033    0x0209     ; Colors: 5 - 431,533,641,753,864
  034    0x020A     ; Colors: 7 - 533,641,753,864,A74,C85,DA6
  035    0x020B     ; Colors: 6 - 641,753,864,A74,C85,DA6
  036    0x0220     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  037    0x0221     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  038    0x0222     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  039    0x0223     ; Colors: 5 - 753,864,A74,C85,DA6
  040    0x0220     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  041    0x0221     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  042    0x0222     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  043    0x0223     ; Colors: 5 - 753,864,A74,C85,DA6
  044    0x0220     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  045    0x0221     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  046    0x0222     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  047    0x0223     ; Colors: 5 - 753,864,A74,C85,DA6
  048    0x0210     ; Colors: 4 - 111,431,533,641
  049    0x0211     ; Colors: 5 - 431,533,641,753,864
  050    0x0212     ; Colors: 5 - 641,753,864,A74,C85
  051    0x0213     ; Colors: 6 - 641,753,864,A74,C85,DA6
  052    0x0228     ; Colors: 6 - 753,864,A74,C85,DA6,EC7
  053    0x0229     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  054    0x022A     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  055    0x022B     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  056    0x0228     ; Colors: 6 - 753,864,A74,C85,DA6,EC7
  057    0x0229     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  058    0x022A     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  059    0x022B     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  060    0x0228     ; Colors: 6 - 753,864,A74,C85,DA6,EC7
  061    0x0229     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  062    0x022A     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  063    0x022B     ; Colors: 7 - 753,864,A74,C85,DA6,EC7,FF9
  064    0x0218     ; Colors: 4 - 111,431,533,641
  065    0x0219     ; Colors: 5 - 431,533,641,753,864
  066    0x021A     ; Colors: 5 - 641,753,864,A74,C85
  067    0x021B     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  068    0x021C     ; Colors: 5 - 753,864,A74,C85,DA6
  069    0x0231     ; Colors: 6 - 533,641,753,864,A74,C85
  070    0x0232     ; Colors: 7 - 533,641,753,864,A74,C85,DA6
  071    0x0233     ; Colors: 5 - 533,641,753,864,A74
  072    0x0230     ; Colors: 6 - 533,641,753,864,A74,C85
  073    0x0231     ; Colors: 6 - 533,641,753,864,A74,C85
  074    0x0232     ; Colors: 7 - 533,641,753,864,A74,C85,DA6
  075    0x0233     ; Colors: 5 - 533,641,753,864,A74
  076    0x0230     ; Colors: 6 - 533,641,753,864,A74,C85
  077    0x0231     ; Colors: 6 - 533,641,753,864,A74,C85
  078    0x0232     ; Colors: 7 - 533,641,753,864,A74,C85,DA6
  079    0x0233     ; Colors: 5 - 533,641,753,864,A74
  080    0x0208     ; Colors: 4 - 111,431,533,641
  081    0x0209     ; Colors: 5 - 431,533,641,753,864
  082    0x020A     ; Colors: 7 - 533,641,753,864,A74,C85,DA6
  083    0x020B     ; Colors: 6 - 641,753,864,A74,C85,DA6
  084    0x0220     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  085    0x020B (FL); Colors: 6 - 641,753,864,A74,C85,DA6
  086    0x020A (FL); Colors: 7 - 533,641,753,864,A74,C85,DA6
  087    0x02E0 (FL); Colors: 5 - 431,533,641,753,864
  088    0x02E0 (FL); Colors: 5 - 431,533,641,753,864
  089    0x0239     ; Colors: 6 - 111,431,533,641,753,864
  090    0x023A     ; Colors: 5 - 431,533,641,753,864
  091    0x023B     ; Colors: 6 - 111,431,533,641,753,864
  092    0x0238     ; Colors: 5 - 111,431,533,641,753
  093    0x0239     ; Colors: 6 - 111,431,533,641,753,864
  094    0x023A     ; Colors: 5 - 431,533,641,753,864
  095    0x023B     ; Colors: 6 - 111,431,533,641,753,864
  096    0x0210     ; Colors: 4 - 111,431,533,641
  097    0x0211     ; Colors: 5 - 431,533,641,753,864
  098    0x0212     ; Colors: 5 - 641,753,864,A74,C85
  099    0x0213     ; Colors: 6 - 641,753,864,A74,C85,DA6
  100    0x0228     ; Colors: 6 - 753,864,A74,C85,DA6,EC7
  101    0x0213 (FL); Colors: 6 - 641,753,864,A74,C85,DA6
  102    0x0212 (FL); Colors: 5 - 641,753,864,A74,C85
  103    0x02E8 (FL); Colors: 5 - 431,533,641,753,864
  104    0x0257 (FL); Colors: 5 - 110,111,431,533,641
  105    0x02E4 (FL); Colors: 5 - 000,035,146,257,368
  106    0x02E3 (FL); Colors: 8 - 000,035,146,257,368,479,58A,ABC
  107    0x02E3     ; Colors: 8 - 000,035,146,257,368,479,58A,ABC
  108    0x02E4     ; Colors: 5 - 000,035,146,257,368
  109    0x022C     ; Colors: 1 - 000
  110    0x02E4 (FL); Colors: 5 - 000,035,146,257,368
  111    0x02E4     ; Colors: 5 - 000,035,146,257,368
  112    0x0218     ; Colors: 4 - 111,431,533,641
  113    0x0219     ; Colors: 5 - 431,533,641,753,864
  114    0x021A     ; Colors: 5 - 641,753,864,A74,C85
  115    0x021B     ; Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  116    0x021C     ; Colors: 5 - 753,864,A74,C85,DA6
  117    0x021B (FL); Colors: 7 - 641,753,864,A74,C85,DA6,EC7
  118    0x021A (FL); Colors: 5 - 641,753,864,A74,C85
  119    0x02BE (FL); Colors: 5 - 431,533,641,753,864
  120    0x027A (FL); Colors: 4 - 111,431,533,641
  121    0x02F6 (FL); Colors: 4 - 000,035,146,257
  122    0x02F5 (FL); Colors: 8 - 000,035,146,257,368,479,58A,ABC
  123    0x02F5     ; Colors: 8 - 000,035,146,257,368,479,58A,ABC
  124    0x02F6     ; Colors: 4 - 000,035,146,257
  125    0x022C     ; Colors: 1 - 000
  126    0x02F6 (FL); Colors: 4 - 000,035,146,257
  127    0x02F6     ; Colors: 4 - 000,035,146,257