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Drawing ships: SHIP_CANISTER

[BBC Micro disc version, Ship blueprints M]

Name: SHIP_CANISTER [Show more] Type: Variable Category: Drawing ships Summary: Ship blueprint for a cargo canister Deep dive: Ship blueprints
Context: See this variable in context in the source code Variations: See code variations for this variable in the different versions References: This variable is used as follows: * XX21 uses SHIP_CANISTER
.SHIP_CANISTER EQUB 0 \ Max. canisters on demise = 0 EQUW 20 * 20 \ Targetable area = 20 * 20 EQUB LO(SHIP_CANISTER_EDGES - SHIP_CANISTER) \ Edges data offset (low) EQUB LO(SHIP_CANISTER_FACES - SHIP_CANISTER) \ Faces data offset (low) EQUB 49 \ Max. edge count = (49 - 1) / 4 = 12 EQUB 0 \ Gun vertex = 0 EQUB 18 \ Explosion count = 3, as (4 * n) + 6 = 18 EQUB 60 \ Number of vertices = 60 / 6 = 10 EQUB 15 \ Number of edges = 15 EQUW 0 \ Bounty = 0 EQUB 28 \ Number of faces = 28 / 4 = 7 EQUB 12 \ Visibility distance = 12 EQUB 17 \ Max. energy = 17 EQUB 15 \ Max. speed = 15 EQUB HI(SHIP_CANISTER_EDGES - SHIP_CANISTER) \ Edges data offset (high) EQUB HI(SHIP_CANISTER_FACES - SHIP_CANISTER) \ Faces data offset (high) EQUB 2 \ Normals are scaled by = 2^2 = 4 EQUB %00000000 \ Laser power = 0 \ Missiles = 0 .SHIP_CANISTER_VERTICES \ x, y, z, face1, face2, face3, face4, visibility VERTEX 24, 16, 0, 0, 1, 5, 5, 31 \ Vertex 0 VERTEX 24, 5, 15, 0, 1, 2, 2, 31 \ Vertex 1 VERTEX 24, -13, 9, 0, 2, 3, 3, 31 \ Vertex 2 VERTEX 24, -13, -9, 0, 3, 4, 4, 31 \ Vertex 3 VERTEX 24, 5, -15, 0, 4, 5, 5, 31 \ Vertex 4 VERTEX -24, 16, 0, 1, 5, 6, 6, 31 \ Vertex 5 VERTEX -24, 5, 15, 1, 2, 6, 6, 31 \ Vertex 6 VERTEX -24, -13, 9, 2, 3, 6, 6, 31 \ Vertex 7 VERTEX -24, -13, -9, 3, 4, 6, 6, 31 \ Vertex 8 VERTEX -24, 5, -15, 4, 5, 6, 6, 31 \ Vertex 9 .SHIP_CANISTER_EDGES \ vertex1, vertex2, face1, face2, visibility EDGE 0, 1, 0, 1, 31 \ Edge 0 EDGE 1, 2, 0, 2, 31 \ Edge 1 EDGE 2, 3, 0, 3, 31 \ Edge 2 EDGE 3, 4, 0, 4, 31 \ Edge 3 EDGE 0, 4, 0, 5, 31 \ Edge 4 EDGE 0, 5, 1, 5, 31 \ Edge 5 EDGE 1, 6, 1, 2, 31 \ Edge 6 EDGE 2, 7, 2, 3, 31 \ Edge 7 EDGE 3, 8, 3, 4, 31 \ Edge 8 EDGE 4, 9, 4, 5, 31 \ Edge 9 EDGE 5, 6, 1, 6, 31 \ Edge 10 EDGE 6, 7, 2, 6, 31 \ Edge 11 EDGE 7, 8, 3, 6, 31 \ Edge 12 EDGE 8, 9, 4, 6, 31 \ Edge 13 EDGE 9, 5, 5, 6, 31 \ Edge 14 .SHIP_CANISTER_FACES \ normal_x, normal_y, normal_z, visibility FACE 96, 0, 0, 31 \ Face 0 FACE 0, 41, 30, 31 \ Face 1 FACE 0, -18, 48, 31 \ Face 2 FACE 0, -51, 0, 31 \ Face 3 FACE 0, -18, -48, 31 \ Face 4 FACE 0, 41, -30, 31 \ Face 5 FACE -96, 0, 0, 31 \ Face 6