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Drawing ships: SHIP_GECKO

[BBC Micro disc version, Ship blueprints N]

Name: SHIP_GECKO [Show more] Type: Variable Category: Drawing ships Summary: Ship blueprint for a Gecko 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_GECKO
.SHIP_GECKO EQUB 0 \ Max. canisters on demise = 0 EQUW 99 * 99 \ Targetable area = 99 * 99 EQUB LO(SHIP_GECKO_EDGES - SHIP_GECKO) \ Edges data offset (low) EQUB LO(SHIP_GECKO_FACES - SHIP_GECKO) \ Faces data offset (low) EQUB 65 \ Max. edge count = (65 - 1) / 4 = 16 EQUB 0 \ Gun vertex = 0 EQUB 26 \ Explosion count = 5, as (4 * n) + 6 = 26 EQUB 72 \ Number of vertices = 72 / 6 = 12 EQUB 17 \ Number of edges = 17 EQUW 55 \ Bounty = 55 EQUB 36 \ Number of faces = 36 / 4 = 9 EQUB 18 \ Visibility distance = 18 EQUB 70 \ Max. energy = 70 EQUB 30 \ Max. speed = 30 EQUB HI(SHIP_GECKO_EDGES - SHIP_GECKO) \ Edges data offset (high) EQUB HI(SHIP_GECKO_FACES - SHIP_GECKO) \ Faces data offset (high) EQUB 3 \ Normals are scaled by = 2^3 = 8 EQUB %00010000 \ Laser power = 2 \ Missiles = 0 .SHIP_GECKO_VERTICES \ x, y, z, face1, face2, face3, face4, visibility VERTEX -10, -4, 47, 3, 0, 5, 4, 31 \ Vertex 0 VERTEX 10, -4, 47, 1, 0, 3, 2, 31 \ Vertex 1 VERTEX -16, 8, -23, 5, 0, 7, 6, 31 \ Vertex 2 VERTEX 16, 8, -23, 1, 0, 8, 7, 31 \ Vertex 3 VERTEX -66, 0, -3, 5, 4, 6, 6, 31 \ Vertex 4 VERTEX 66, 0, -3, 2, 1, 8, 8, 31 \ Vertex 5 VERTEX -20, -14, -23, 4, 3, 7, 6, 31 \ Vertex 6 VERTEX 20, -14, -23, 3, 2, 8, 7, 31 \ Vertex 7 VERTEX -8, -6, 33, 3, 3, 3, 3, 16 \ Vertex 8 VERTEX 8, -6, 33, 3, 3, 3, 3, 17 \ Vertex 9 VERTEX -8, -13, -16, 3, 3, 3, 3, 16 \ Vertex 10 VERTEX 8, -13, -16, 3, 3, 3, 3, 17 \ Vertex 11 .SHIP_GECKO_EDGES \ vertex1, vertex2, face1, face2, visibility EDGE 0, 1, 3, 0, 31 \ Edge 0 EDGE 1, 5, 2, 1, 31 \ Edge 1 EDGE 5, 3, 8, 1, 31 \ Edge 2 EDGE 3, 2, 7, 0, 31 \ Edge 3 EDGE 2, 4, 6, 5, 31 \ Edge 4 EDGE 4, 0, 5, 4, 31 \ Edge 5 EDGE 5, 7, 8, 2, 31 \ Edge 6 EDGE 7, 6, 7, 3, 31 \ Edge 7 EDGE 6, 4, 6, 4, 31 \ Edge 8 EDGE 0, 2, 5, 0, 29 \ Edge 9 EDGE 1, 3, 1, 0, 30 \ Edge 10 EDGE 0, 6, 4, 3, 29 \ Edge 11 EDGE 1, 7, 3, 2, 30 \ Edge 12 EDGE 2, 6, 7, 6, 20 \ Edge 13 EDGE 3, 7, 8, 7, 20 \ Edge 14 EDGE 8, 10, 3, 3, 16 \ Edge 15 EDGE 9, 11, 3, 3, 17 \ Edge 16 .SHIP_GECKO_FACES \ normal_x, normal_y, normal_z, visibility FACE 0, 31, 5, 31 \ Face 0 FACE 4, 45, 8, 31 \ Face 1 FACE 25, -108, 19, 31 \ Face 2 FACE 0, -84, 12, 31 \ Face 3 FACE -25, -108, 19, 31 \ Face 4 FACE -4, 45, 8, 31 \ Face 5 FACE -88, 16, -214, 31 \ Face 6 FACE 0, 0, -187, 31 \ Face 7 FACE 88, 16, -214, 31 \ Face 8