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Elite on the BBC Micro

Version analysis of SHIP_BOA

This code appears in the following versions (click to see it in the source code):

Code variations between these versions are shown below.

Name: SHIP_BOA Type: Variable Category: Drawing ships Summary: Ship blueprint for a Boa Deep dive: Ship blueprints
.SHIP_BOA EQUB 5 \ Max. canisters on demise = 5 EQUW 70 * 70 \ Targetable area = 70 * 70 EQUB &62 \ Edges data offset (low) = &0062 EQUB &C2 \ Faces data offset (low) = &00C2

Code variation 1 of 1Related to an advanced feature

The advanced versions of Elite have an extra edge count for the ship colour; Boas are shown in cyan.

Tap on a version to expand it, and tap it again to show to all variations.

Flight

6502SP, Master

EQUB 89 \ Max. edge count = (89 - 1) / 4 = 22
EQUB 93 \ Max. edge count = (93 - 1) / 4 = 23
 EQUB 0                 \ Gun vertex               = 0
 EQUB 38                \ Explosion count          = 8, as (4 * n) + 6 = 38
 EQUB 78                \ Number of vertices       = 78 / 6 = 13
 EQUB 24                \ Number of edges          = 24
 EQUW 0                 \ Bounty                   = 0
 EQUB 52                \ Number of faces          = 52 / 4 = 13
 EQUB 40                \ Visibility distance      = 40
 EQUB 250               \ Max. energy              = 250
 EQUB 24                \ Max. speed               = 24
 EQUB &00               \ Edges data offset (high) = &0062
 EQUB &00               \ Faces data offset (high) = &00C2
 EQUB 0                 \ Normals are scaled by    = 2^0 = 1
 EQUB %00011100         \ Laser power              = 3
                        \ Missiles                 = 4

\VERTEX    x,    y,    z, face1, face2, face3, face4, visibility
 VERTEX    0,    0,   93,    15,     15,   15,    15,         31    \ Vertex 0
 VERTEX    0,   40,  -87,     2,      0,    3,     3,         24    \ Vertex 1
 VERTEX   38,  -25,  -99,     1,      0,    4,     4,         24    \ Vertex 2
 VERTEX  -38,  -25,  -99,     2,      1,    5,     5,         24    \ Vertex 3
 VERTEX  -38,   40,  -59,     3,      2,    9,     6,         31    \ Vertex 4
 VERTEX   38,   40,  -59,     3,      0,   11,     6,         31    \ Vertex 5
 VERTEX   62,    0,  -67,     4,      0,   11,     8,         31    \ Vertex 6
 VERTEX   24,  -65,  -79,     4,      1,   10,     8,         31    \ Vertex 7
 VERTEX  -24,  -65,  -79,     5,      1,   10,     7,         31    \ Vertex 8
 VERTEX  -62,    0,  -67,     5,      2,    9,     7,         31    \ Vertex 9
 VERTEX    0,    7, -107,     2,      0,   10,    10,         22    \ Vertex 10
 VERTEX   13,   -9, -107,     1,      0,   10,    10,         22    \ Vertex 11
 VERTEX  -13,   -9, -107,     2,      1,   12,    12,         22    \ Vertex 12

\EDGE vertex1, vertex2, face1, face2, visibility
 EDGE       0,       5,    11,     6,         31    \ Edge 0
 EDGE       0,       7,    10,     8,         31    \ Edge 1
 EDGE       0,       9,     9,     7,         31    \ Edge 2
 EDGE       0,       4,     9,     6,         29    \ Edge 3
 EDGE       0,       6,    11,     8,         29    \ Edge 4
 EDGE       0,       8,    10,     7,         29    \ Edge 5
 EDGE       4,       5,     6,     3,         31    \ Edge 6
 EDGE       5,       6,    11,     0,         31    \ Edge 7
 EDGE       6,       7,     8,     4,         31    \ Edge 8
 EDGE       7,       8,    10,     1,         31    \ Edge 9
 EDGE       8,       9,     7,     5,         31    \ Edge 10
 EDGE       4,       9,     9,     2,         31    \ Edge 11
 EDGE       1,       4,     3,     2,         24    \ Edge 12
 EDGE       1,       5,     3,     0,         24    \ Edge 13
 EDGE       3,       9,     5,     2,         24    \ Edge 14
 EDGE       3,       8,     5,     1,         24    \ Edge 15
 EDGE       2,       6,     4,     0,         24    \ Edge 16
 EDGE       2,       7,     4,     1,         24    \ Edge 17
 EDGE       1,      10,     2,     0,         22    \ Edge 18
 EDGE       2,      11,     1,     0,         22    \ Edge 19
 EDGE       3,      12,     2,     1,         22    \ Edge 20
 EDGE      10,      11,    12,     0,         14    \ Edge 21
 EDGE      11,      12,    12,     1,         14    \ Edge 22
 EDGE      12,      10,    12,     2,         14    \ Edge 23

\FACE normal_x, normal_y, normal_z, visibility
 FACE       43,       37,      -60,         31    \ Face 0
 FACE        0,      -45,      -89,         31    \ Face 1
 FACE      -43,       37,      -60,         31    \ Face 2
 FACE        0,       40,        0,         31    \ Face 3
 FACE       62,      -32,      -20,         31    \ Face 4
 FACE      -62,      -32,      -20,         31    \ Face 5
 FACE        0,       23,        6,         31    \ Face 6
 FACE      -23,      -15,        9,         31    \ Face 7
 FACE       23,      -15,        9,         31    \ Face 8
 FACE      -26,       13,       10,         31    \ Face 9
 FACE        0,      -31,       12,         31    \ Face 10
 FACE       26,       13,       10,         31    \ Face 11
 FACE        0,        0,     -107,         14    \ Face 12

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