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Elite on the BBC Micro

Version analysis of SHIP_BOULDER

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_BOULDER Type: Variable Category: Drawing ships Summary: Ship blueprint for a boulder Deep dive: Ship blueprints
.SHIP_BOULDER EQUB 0 \ Max. canisters on demise = 0 EQUW 30 * 30 \ Targetable area = 30 * 30 EQUB LO(SHIP_BOULDER_EDGES - SHIP_BOULDER) \ Edges data offset (low) EQUB LO(SHIP_BOULDER_FACES - SHIP_BOULDER) \ Faces data offset (low)

Code variation 1 of 1Related to an advanced feature

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

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

Flight

6502SP, Master

EQUB 45 \ Max. edge count = (45 - 1) / 4 = 11
EQUB 49 \ Max. edge count = (49 - 1) / 4 = 12
 EQUB 0                 \ Gun vertex               = 0
 EQUB 14                \ Explosion count          = 2, as (4 * n) + 6 = 14
 EQUB 42                \ Number of vertices       = 42 / 6 = 7
 EQUB 15                \ Number of edges          = 15
 EQUW 1                 \ Bounty                   = 1
 EQUB 40                \ Number of faces          = 40 / 4 = 10
 EQUB 20                \ Visibility distance      = 20
 EQUB 20                \ Max. energy              = 20
 EQUB 30                \ Max. speed               = 30
 EQUB HI(SHIP_BOULDER_EDGES - SHIP_BOULDER)        \ Edges data offset (high)
 EQUB HI(SHIP_BOULDER_FACES - SHIP_BOULDER)        \ Faces data offset (high)
 EQUB 2                 \ Normals are scaled by    = 2^2 = 4
 EQUB %00000000         \ Laser power              = 0
                        \ Missiles                 = 0

\VERTEX    x,    y,    z, face1, face2, face3, face4, visibility
 VERTEX  -18,   37,  -11,     1,      0,    9,     5,         31    \ Vertex 0
 VERTEX   30,    7,   12,     2,      1,    6,     5,         31    \ Vertex 1
 VERTEX   28,   -7,  -12,     3,      2,    7,     6,         31    \ Vertex 2
 VERTEX    2,    0,  -39,     4,      3,    8,     7,         31    \ Vertex 3
 VERTEX  -28,   34,  -30,     4,      0,    9,     8,         31    \ Vertex 4
 VERTEX    5,  -10,   13,    15,     15,   15,    15,         31    \ Vertex 5
 VERTEX   20,   17,  -30,    15,     15,   15,    15,         31    \ Vertex 6

.SHIP_BOULDER_EDGES

\EDGE vertex1, vertex2, face1, face2, visibility
 EDGE       0,       1,     5,     1,         31    \ Edge 0
 EDGE       1,       2,     6,     2,         31    \ Edge 1
 EDGE       2,       3,     7,     3,         31    \ Edge 2
 EDGE       3,       4,     8,     4,         31    \ Edge 3
 EDGE       4,       0,     9,     0,         31    \ Edge 4
 EDGE       0,       5,     1,     0,         31    \ Edge 5
 EDGE       1,       5,     2,     1,         31    \ Edge 6
 EDGE       2,       5,     3,     2,         31    \ Edge 7
 EDGE       3,       5,     4,     3,         31    \ Edge 8
 EDGE       4,       5,     4,     0,         31    \ Edge 9
 EDGE       0,       6,     9,     5,         31    \ Edge 10
 EDGE       1,       6,     6,     5,         31    \ Edge 11
 EDGE       2,       6,     7,     6,         31    \ Edge 12
 EDGE       3,       6,     8,     7,         31    \ Edge 13
 EDGE       4,       6,     9,     8,         31    \ Edge 14

.SHIP_BOULDER_FACES

\FACE normal_x, normal_y, normal_z, visibility
 FACE      -15,       -3,        8,         31    \ Face 0
 FACE       -7,       12,       30,         31    \ Face 1
 FACE       32,      -47,       24,         31    \ Face 2
 FACE       -3,      -39,       -7,         31    \ Face 3
 FACE       -5,       -4,       -1,         31    \ Face 4
 FACE       49,       84,        8,         31    \ Face 5
 FACE      112,       21,      -21,         31    \ Face 6
 FACE       76,      -35,      -82,         31    \ Face 7
 FACE       22,       56,     -137,         31    \ Face 8
 FACE       40,      110,      -38,         31    \ Face 9

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