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Elite on the BBC Micro

Version analysis of SHIP_PLATE

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_PLATE Type: Variable Category: Drawing ships Summary: Ship blueprint for an alloy plate Deep dive: Ship blueprints
.SHIP_PLATE EQUB 0 + (8 << 4) \ Max. canisters on demise = 0 \ Market item when scooped = 8 + 1 = 9 (Alloys) EQUW 10 * 10 \ Targetable area = 10 * 10 EQUB LO(SHIP_PLATE_EDGES - SHIP_PLATE) \ Edges data offset (low) EQUB LO(SHIP_PLATE_FACES - SHIP_PLATE) \ 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; alloy plates are shown in cyan.

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

Flight

6502SP, Master

EQUB 17 \ Max. edge count = (17 - 1) / 4 = 4
EQUB 21 \ Max. edge count = (21 - 1) / 4 = 5
 EQUB 0                 \ Gun vertex               = 0
 EQUB 10                \ Explosion count          = 1, as (4 * n) + 6 = 10
 EQUB 24                \ Number of vertices       = 24 / 6 = 4
 EQUB 4                 \ Number of edges          = 4
 EQUW 0                 \ Bounty                   = 0
 EQUB 4                 \ Number of faces          = 4 / 4 = 1
 EQUB 5                 \ Visibility distance      = 5
 EQUB 16                \ Max. energy              = 16
 EQUB 16                \ Max. speed               = 16
 EQUB HI(SHIP_PLATE_EDGES - SHIP_PLATE)            \ Edges data offset (high)
 EQUB HI(SHIP_PLATE_FACES - SHIP_PLATE)            \ Faces data offset (high)
 EQUB 3                 \ Normals are scaled by    = 2^3 = 8
 EQUB %00000000         \ Laser power              = 0
                        \ Missiles                 = 0

\VERTEX    x,    y,    z, face1, face2, face3, face4, visibility
 VERTEX  -15,  -22,   -9,    15,     15,   15,    15,         31    \ Vertex 0
 VERTEX  -15,   38,   -9,    15,     15,   15,    15,         31    \ Vertex 1
 VERTEX   19,   32,   11,    15,     15,   15,    15,         20    \ Vertex 2
 VERTEX   10,  -46,    6,    15,     15,   15,    15,         20    \ Vertex 3

.SHIP_PLATE_EDGES

\EDGE vertex1, vertex2, face1, face2, visibility
 EDGE       0,       1,    15,    15,         31    \ Edge 0
 EDGE       1,       2,    15,    15,         16    \ Edge 1
 EDGE       2,       3,    15,    15,         20    \ Edge 2
 EDGE       3,       0,    15,    15,         16    \ Edge 3

.SHIP_PLATE_FACES

\FACE normal_x, normal_y, normal_z, visibility
 FACE        0,        0,        0,          0    \ Face 0

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