; Copyright 2020 faddenSoft. All Rights Reserved.
; See the LICENSE.txt file for distribution terms (Apache 2.0).
;
; Assembler: Merlin 32

; Cube with a decoration on the front (should look like a "7").
; Defined in a left-handed coordinate system (+Z away from viewer).

        org     $1000

        lda     vertices
        lda     edges
        lda     faces
        rts

; List of vertices (X,Y,Z).
vertices
        dfb     -32,32,-32      ;0
        dfb     -32,-32,-32     ;1
        dfb     32,-32,-32      ;2
        dfb     32,32,-32       ;3
        dfb     -32,32,32       ;4
        dfb     -32,-32,32      ;5
        dfb     32,-32,32       ;6
        dfb     32,32,32        ;7

; Put a decoration on the front face.
        dfb     -20,-20,-32     ;8
        dfb     20,20,-32       ;9
        dfb     10,20,-32       ;10
        dfb     $80

; List of edges (vertex0, vertex1, face0, face1).
edges
        dfb     0,1,  0,5       ;0
        dfb     1,2,  0,3       ;1
        dfb     2,3,  0,4       ;2
        dfb     3,0,  0,2       ;3
        dfb     4,5,  1,5       ;4
        dfb     5,6,  1,3       ;5
        dfb     6,7,  1,4       ;6
        dfb     7,4,  1,2       ;7
        dfb     0,4,  2,5       ;8
        dfb     1,5,  3,5       ;9
        dfb     2,6,  3,4       ;10
        dfb     3,7,  2,4       ;11

        dfb     8,9,  0,0       ;12
        dfb     9,10, 0,0       ;13
        dfb     $80

; List of faces (surface normal X,Y,Z).
faces
        dfb     0,0,-1          ;0 front
        dfb     0,0,1           ;1 back
        dfb     0,1,0           ;2 top
        dfb     0,-1,0          ;3 bottom
        dfb     1,0,0           ;4 right
        dfb     -1,0,0          ;5 left
        dfb     $80