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tweaking cobra mk3
This commit is contained in:
Irmen de Jong
parent
18f5963b09
commit
2f951bd54d
@ -200,13 +200,13 @@ romsub $ff23 = GRAPH_clear() clobbers(A,X,Y)
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romsub $ff26 = GRAPH_set_window() ; uses x=r0, y=r1, width=r2, height=r3
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romsub $ff29 = GRAPH_set_colors(ubyte stroke @A, ubyte fill @X, ubyte background @Y) clobbers (A,X,Y)
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romsub $ff2c = GRAPH_draw_line() clobbers(A,X,Y) ; uses x1=r0, y1=r1, x2=r2, y2=r3
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romsub $ff2f = GRAPH_draw_rect(ubyte fill @Pc) ; uses x=r0, y=r1, width=r2, height=r3, cornerradius=r4
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romsub $ff2f = GRAPH_draw_rect(ubyte fill @Pc) clobbers(A,X,Y) ; uses x=r0, y=r1, width=r2, height=r3, cornerradius=r4
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romsub $ff32 = GRAPH_move_rect() ; uses sx=r0, sy=r1, tx=r2, ty=r3, width=r4, height=r5
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romsub $ff35 = GRAPH_draw_oval(ubyte fill @Pc) ; uses x=r0, y=r1, width=r2, height=r3
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romsub $ff38 = GRAPH_draw_image() ; uses x=r0, y=r1, ptr=r2, width=r3, height=r4
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romsub $ff3b = GRAPH_set_font() ; uses ptr=r0
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romsub $ff3e = GRAPH_get_char_size(ubyte baseline @A, ubyte width @X, ubyte height_or_style @Y, ubyte is_control @Pc)
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romsub $ff41 = GRAPH_put_char(ubyte char @A) ; uses x=r0, y=r1
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romsub $ff41 = GRAPH_put_char(ubyte char @A) clobbers(A,X,Y) ; uses x=r0, y=r1
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; framebuffer
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romsub $fef6 = FB_init()
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@ -1,24 +1,14 @@
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%target cx16
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%import cx16lib
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%import conv
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main {
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; Ship model data converted from BBC Elite's Cobra MK 3
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; downloaded from http://www.elitehomepage.org/archive/index.htm
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; vertices
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word[] xcoor = [ 32,-32,0,-120,120,-88,88,128,-128,0,-32,32,-36,-8,8,36,36,8,-8,-36,-1,-1,-80,-80,-88,80,88,80,1,1,1,1,-1,-1 ]
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word[] ycoor = [ 0,0,26,-3,-3,16,16,-8,-8,26,-24,-24,8,12,12,8,-12,-16,-16,-12,-1,-1,-6,6,0,6,0,-6,-1,-1,1,1,1,1 ]
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word[] zcoor = [ 76,76,24,-8,-8,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,76,90,-40,-40,-40,-40,-40,-40,76,90,76,90,76,90 ]
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; storage for rotated coordinates
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word[len(xcoor)] rotatedx
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word[len(ycoor)] rotatedy
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word[len(zcoor)] rotatedz
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word[shipdata.totalNumberOfPoints] rotatedx
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word[shipdata.totalNumberOfPoints] rotatedy
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word[shipdata.totalNumberOfPoints] rotatedz
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; edges
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ubyte[] edgesFrom = [ 0,1,0,10,1,0,2,0,4,0,4,7,2,1,1,3,8,3,2,5,6,5,6,16,15,14,14,18,13,12,12,26,25,25,22,23,22,20,28,21,20,28,29,30,31,30,32,20,21,20,20 ]
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ubyte[] edgesTo = [ 1,2,2,11,10,11,6,6,6,4,7,11,5,5,3,5,10,8,9,9,9,8,7,17,16,15,17,19,18,13,19,27,26,27,23,24,24,28,29,29,21,30,31,31,33,32,33,32,33,33,29 ]
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; TODO hidden surface removal - this needs surfaces data and surface normal calculations.
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; TODO add all other Elite's ships, show their name, advance to next ship on keypress
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@ -31,18 +21,76 @@ main {
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void cx16.screen_set_mode($80)
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cx16.r0 = 0
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cx16.GRAPH_init()
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cx16.GRAPH_set_colors(1, 2, 0)
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cx16.GRAPH_set_colors(13, 6, 6)
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cx16.GRAPH_clear()
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print_ship_name()
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repeat {
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rotate_vertices(msb(anglex), msb(angley), msb(anglez))
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cx16.GRAPH_clear()
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cx16.GRAPH_set_colors(0, 0, 0)
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cx16.r0 = 32
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cx16.r1 = 10
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cx16.r2 = 256
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cx16.r3 = 185
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cx16.r4 = 0
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cx16.GRAPH_draw_rect(true)
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cx16.GRAPH_set_colors(1, 0, 0)
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draw_lines()
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anglex-=500
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angley+=217
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anglez+=452
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anglex -= 505
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angley += 217
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anglez += 452
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}
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}
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sub print_ship_name() {
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cx16.r0 = 32
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cx16.r1 = 8
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ubyte c
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for c in "ship: "
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cx16.GRAPH_put_char(c)
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for c in shipdata.shipName
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cx16.GRAPH_put_char(c)
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cx16.r0 += 16
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print_number_gfx(shipdata.totalNumberOfPoints)
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for c in " vertices, "
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cx16.GRAPH_put_char(c)
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print_number_gfx(shipdata.totalNumberOfEdges)
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for c in " edges, "
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cx16.GRAPH_put_char(c)
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print_number_gfx(shipdata.totalNumberOfFaces)
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for c in " faces"
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cx16.GRAPH_put_char(c)
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}
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asmsub print_number_gfx(ubyte num @ A) clobbers(A,Y) {
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%asm {{
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phx
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jsr conv.ubyte2decimal
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stx P8ZP_SCRATCH_REG_X
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pha
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cpy #'0'
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beq +
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tya
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jsr cx16.GRAPH_put_char
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pla
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jsr cx16.GRAPH_put_char
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jmp _ones
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+ pla
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cmp #'0'
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beq _ones
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jsr cx16.GRAPH_put_char
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_ones lda P8ZP_SCRATCH_REG_X
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jsr cx16.GRAPH_put_char
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plx
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rts
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}}
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}
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sub rotate_vertices(ubyte ax, ubyte ay, ubyte az) {
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; rotate around origin (0,0,0)
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@ -68,11 +116,11 @@ main {
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word Azz = wcosb*wcosc / 128
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ubyte @zp i
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for i in 0 to len(xcoor)-1 {
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for i in 0 to shipdata.totalNumberOfPoints-1 {
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; don't normalize by dividing by 128, instead keep some precision for perspective calc later
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rotatedx[i] = Axx*xcoor[i] + Axy*ycoor[i] + Axz*zcoor[i]
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rotatedy[i] = Ayx*xcoor[i] + Ayy*ycoor[i] + Ayz*zcoor[i]
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rotatedz[i] = Azx*xcoor[i] + Azy*ycoor[i] + Azz*zcoor[i]
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rotatedx[i] = Axx*shipdata.xcoor[i] + Axy*shipdata.ycoor[i] + Axz*shipdata.zcoor[i]
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rotatedy[i] = Ayx*shipdata.xcoor[i] + Ayy*shipdata.ycoor[i] + Ayz*shipdata.zcoor[i]
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rotatedz[i] = Azx*shipdata.xcoor[i] + Azy*shipdata.ycoor[i] + Azz*shipdata.zcoor[i]
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}
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}
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@ -81,9 +129,9 @@ main {
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sub draw_lines() {
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ubyte @zp i
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for i in len(edgesFrom) -1 downto 0 {
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ubyte @zp vFrom = edgesFrom[i]
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ubyte @zp vTo = edgesTo[i]
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for i in shipdata.totalNumberOfEdges -1 downto 0 {
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ubyte @zp vFrom = shipdata.edgesFrom[i]
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ubyte @zp vTo = shipdata.edgesTo[i]
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word persp1 = 200 + rotatedz[vFrom]/256
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word persp2 = 200 + rotatedz[vTo]/256
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cx16.r0 = rotatedx[vFrom] / persp1 + screen_width/2 as uword
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@ -94,3 +142,70 @@ main {
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}
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}
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}
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shipdata {
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; Ship model data converted from BBC Elite's Cobra MK 3
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; downloaded from http://www.elitehomepage.org/archive/index.htm
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const ubyte totalNumberOfEdges = 51
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const ubyte totalNumberOfFaces = 22
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const ubyte totalNumberOfPoints = 34
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str shipName = "cobra-mk3"
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; vertices
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word[] xcoor = [ 32,-32,0,-120,120,-88,88,128,-128,0,-32,32,-36,-8,8,36,36,8,-8,-36,-1,-1,-80,-80,-88,80,88,80,1,1,1,1,-1,-1 ]
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word[] ycoor = [ 0,0,26,-3,-3,16,16,-8,-8,26,-24,-24,8,12,12,8,-12,-16,-16,-12,-1,-1,-6,6,0,6,0,-6,-1,-1,1,1,1,1 ]
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word[] zcoor = [ 76,76,24,-8,-8,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,-40,76,90,-40,-40,-40,-40,-40,-40,76,90,76,90,76,90 ]
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; edges and faces
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ubyte[] edgesFrom = [ 0,1,0,10,1,0,2,0,4,0,4,7,2,1,1,3,8,3,2,5,6,5,6,16,15,14,14,18,13,12,12,26,25,25,22,23,22,20,28,21,20,28,29,30,31,30,32,20,21,20,20 ]
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ubyte[] edgesTo = [ 1,2,2,11,10,11,6,6,6,4,7,11,5,5,3,5,10,8,9,9,9,8,7,17,16,15,17,19,18,13,19,27,26,27,23,24,24,28,29,29,21,30,31,31,33,32,33,32,33,33,29 ]
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ubyte[] facesPoints = [
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0,1,2 ,255,
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11,10,1,0 ,255,
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0,2,6 ,255,
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6,4,0 ,255,
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4,7,11,0 ,255,
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5,2,1 ,255,
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1,3,5 ,255,
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10,8,3,1 ,255,
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9,2,5 ,255,
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9,6,2 ,255,
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3,8,5 ,255,
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4,6,7 ,255,
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5,8,10,11,7,6,9 ,255,
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17,16,15,14 ,255,
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19,18,13,12 ,255,
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27,26,25 ,255,
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22,23,24 ,255,
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20,28,29,21 ,255,
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30,28,29,31 ,255,
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33,31,30,32 ,255,
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20,32,33,21 ,255,
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29,31,33,20 ,255
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]
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ubyte[] facesEdges = [
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0,1,2 ,255,
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3,4,0,5 ,255,
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2,6,7 ,255,
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8,9,7 ,255,
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10,11,5,9 ,255,
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12,1,13 ,255,
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14,15,13 ,255,
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16,17,14,4 ,255,
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18,12,19 ,255,
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20,6,18 ,255,
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17,21,15 ,255,
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8,22,10 ,255,
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21,16,3,11,22,20,19 ,255,
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23,24,25,26 ,255,
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27,28,29,30 ,255,
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31,32,33 ,255,
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34,35,36 ,255,
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37,38,39,40 ,255,
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41,38,42,43 ,255,
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44,43,45,46 ,255,
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47,46,48,40 ,255,
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42,44,49,50 ,255
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]
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}
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