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Drawing ships: SHIP_VIPER

[BBC Micro disc version, Ship blueprints K]

Name: SHIP_VIPER [Show more] Type: Variable Category: Drawing ships Summary: Ship blueprint for a Viper 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_VIPER
.SHIP_VIPER EQUB 0 \ Max. canisters on demise = 0 EQUW 75 * 75 \ Targetable area = 75 * 75 EQUB LO(SHIP_VIPER_EDGES - SHIP_VIPER) \ Edges data offset (low) EQUB LO(SHIP_VIPER_FACES - SHIP_VIPER) \ Faces data offset (low) EQUB 77 \ Max. edge count = (77 - 1) / 4 = 19 EQUB 0 \ Gun vertex = 0 EQUB 42 \ Explosion count = 9, as (4 * n) + 6 = 42 EQUB 90 \ Number of vertices = 90 / 6 = 15 EQUB 20 \ Number of edges = 20 EQUW 0 \ Bounty = 0 EQUB 28 \ Number of faces = 28 / 4 = 7 EQUB 23 \ Visibility distance = 23 EQUB 100 \ Max. energy = 100 EQUB 32 \ Max. speed = 32 EQUB HI(SHIP_VIPER_EDGES - SHIP_VIPER) \ Edges data offset (high) EQUB HI(SHIP_VIPER_FACES - SHIP_VIPER) \ Faces data offset (high) EQUB 1 \ Normals are scaled by = 2^1 = 2 EQUB %00010001 \ Laser power = 2 \ Missiles = 1 .SHIP_VIPER_VERTICES \ x, y, z, face1, face2, face3, face4, visibility VERTEX 0, 0, 72, 1, 2, 3, 4, 31 \ Vertex 0 VERTEX 0, 16, 24, 0, 1, 2, 2, 30 \ Vertex 1 VERTEX 0, -16, 24, 3, 4, 5, 5, 30 \ Vertex 2 VERTEX 48, 0, -24, 2, 4, 6, 6, 31 \ Vertex 3 VERTEX -48, 0, -24, 1, 3, 6, 6, 31 \ Vertex 4 VERTEX 24, -16, -24, 4, 5, 6, 6, 30 \ Vertex 5 VERTEX -24, -16, -24, 5, 3, 6, 6, 30 \ Vertex 6 VERTEX 24, 16, -24, 0, 2, 6, 6, 31 \ Vertex 7 VERTEX -24, 16, -24, 0, 1, 6, 6, 31 \ Vertex 8 VERTEX -32, 0, -24, 6, 6, 6, 6, 19 \ Vertex 9 VERTEX 32, 0, -24, 6, 6, 6, 6, 19 \ Vertex 10 VERTEX 8, 8, -24, 6, 6, 6, 6, 19 \ Vertex 11 VERTEX -8, 8, -24, 6, 6, 6, 6, 19 \ Vertex 12 VERTEX -8, -8, -24, 6, 6, 6, 6, 18 \ Vertex 13 VERTEX 8, -8, -24, 6, 6, 6, 6, 18 \ Vertex 14 .SHIP_VIPER_EDGES \ vertex1, vertex2, face1, face2, visibility EDGE 0, 3, 2, 4, 31 \ Edge 0 EDGE 0, 1, 1, 2, 30 \ Edge 1 EDGE 0, 2, 3, 4, 30 \ Edge 2 EDGE 0, 4, 1, 3, 31 \ Edge 3 EDGE 1, 7, 0, 2, 30 \ Edge 4 EDGE 1, 8, 0, 1, 30 \ Edge 5 EDGE 2, 5, 4, 5, 30 \ Edge 6 EDGE 2, 6, 3, 5, 30 \ Edge 7 EDGE 7, 8, 0, 6, 31 \ Edge 8 EDGE 5, 6, 5, 6, 30 \ Edge 9 EDGE 4, 8, 1, 6, 31 \ Edge 10 EDGE 4, 6, 3, 6, 30 \ Edge 11 EDGE 3, 7, 2, 6, 31 \ Edge 12 EDGE 3, 5, 6, 4, 30 \ Edge 13 EDGE 9, 12, 6, 6, 19 \ Edge 14 EDGE 9, 13, 6, 6, 18 \ Edge 15 EDGE 10, 11, 6, 6, 19 \ Edge 16 EDGE 10, 14, 6, 6, 18 \ Edge 17 EDGE 11, 14, 6, 6, 16 \ Edge 18 EDGE 12, 13, 6, 6, 16 \ Edge 19 .SHIP_VIPER_FACES \ normal_x, normal_y, normal_z, visibility FACE 0, 32, 0, 31 \ Face 0 FACE -22, 33, 11, 31 \ Face 1 FACE 22, 33, 11, 31 \ Face 2 FACE -22, -33, 11, 31 \ Face 3 FACE 22, -33, 11, 31 \ Face 4 FACE 0, -32, 0, 31 \ Face 5 FACE 0, 0, -48, 31 \ Face 6