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3d rotation multiplications now using verafx acceleration
This commit is contained in:
Irmen de Jong
parent
a48ce35f0b
commit
a5cd3728c9
@ -2,16 +2,11 @@
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%import test_stack
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%import conv
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%import math
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%import verafx
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; TODO add all other Elite's ships, show their name, advance to next ship on keypress
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main {
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; storage for rotated coordinates
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word[shipdata.totalNumberOfPoints] @split rotatedx
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word[shipdata.totalNumberOfPoints] @split rotatedy
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word[shipdata.totalNumberOfPoints] @split rotatedz
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sub start() {
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uword anglex
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uword angley
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@ -24,11 +19,11 @@ main {
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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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matrix_math.rotate_vertices(msb(anglex), msb(angley), msb(anglez))
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cx16.GRAPH_set_colors(0, 0, 0)
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; cx16.GRAPH_clear()
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cx16.GRAPH_draw_rect(32, 10, 256, 220, 0, true)
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verafx.clear(0, 320*10, 0, 320*(220/4))
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; cx16.GRAPH_set_colors(0, 0, 0)
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; cx16.GRAPH_draw_rect(32, 10, 256, 220, 0, true)
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cx16.GRAPH_set_colors(1, 0, 0)
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draw_lines_hiddenremoval()
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@ -84,39 +79,6 @@ _ones pla
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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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; set up the 3d rotation matrix values
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word wcosa = math.cos8(ax)
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word wsina = math.sin8(ax)
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word wcosb = math.cos8(ay)
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word wsinb = math.sin8(ay)
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word wcosc = math.cos8(az)
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word wsinc = math.sin8(az)
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word wcosa_sinb = wcosa*wsinb / 128
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word wsina_sinb = wsina*wsinb / 128
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word Axx = wcosa*wcosb / 128
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word Axy = (wcosa_sinb*wsinc - wsina*wcosc) / 128
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word Axz = (wcosa_sinb*wcosc + wsina*wsinc) / 128
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word Ayx = wsina*wcosb / 128
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word Ayy = (wsina_sinb*wsinc + wcosa*wcosc) / 128
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word Ayz = (wsina_sinb*wcosc - wcosa*wsinc) / 128
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word Azx = -wsinb
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word Azy = wcosb*wsinc / 128
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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 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*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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const uword screen_width = 320
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const ubyte screen_height = 240
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@ -126,12 +88,12 @@ _ones pla
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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.GRAPH_draw_line(rotatedx[vFrom] / persp1 + screen_width/2 as uword,
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rotatedy[vFrom] / persp1 + screen_height/2 as uword,
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rotatedx[vTo] / persp2 + screen_width/2 as uword,
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rotatedy[vTo] / persp2 + screen_height/2 as uword)
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word persp1 = 200 + matrix_math.rotatedz[vFrom]/256
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word persp2 = 200 + matrix_math.rotatedz[vTo]/256
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cx16.GRAPH_draw_line(matrix_math.rotatedx[vFrom] / persp1 + screen_width/2 as uword,
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matrix_math.rotatedy[vFrom] / persp1 + screen_height/2 as uword,
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matrix_math.rotatedx[vTo] / persp2 + screen_width/2 as uword,
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matrix_math.rotatedy[vTo] / persp2 + screen_height/2 as uword)
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}
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}
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@ -143,7 +105,7 @@ _ones pla
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ubyte @zp pointIdx = 0
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ubyte faceNumber
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for faceNumber in shipdata.totalNumberOfFaces -1 downto 0 {
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if facing_away(pointIdx) {
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if matrix_math.facing_away(pointIdx) {
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; don't draw this face, fast-forward over the edges and points
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edgeIdx += 3 ; every face hast at least 3 edges
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while shipdata.facesEdges[edgeIdx]!=255 {
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@ -183,6 +145,62 @@ _ones pla
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}
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}
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ubyte[shipdata.totalNumberOfEdges] edgestodraw
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sub draw_edge(ubyte edgeidx) {
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edgestodraw[edgeidx] = false
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ubyte vFrom = shipdata.edgesFrom[edgeidx]
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ubyte vTo = shipdata.edgesTo[edgeidx]
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word persp1 = 170 + matrix_math.rotatedz[vFrom]/256
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word persp2 = 170 + matrix_math.rotatedz[vTo]/256
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cx16.GRAPH_draw_line(matrix_math.rotatedx[vFrom] / persp1 + screen_width/2 as uword,
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matrix_math.rotatedy[vFrom] / persp1 + screen_height/2 as uword,
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matrix_math.rotatedx[vTo] / persp2 + screen_width/2 as uword,
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matrix_math.rotatedy[vTo] / persp2 + screen_height/2 as uword)
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}
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}
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matrix_math {
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%option verafxmuls ; accellerate all word-multiplications in this block using Vera FX hardware muls
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; storage for rotated coordinates
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word[shipdata.totalNumberOfPoints] @split rotatedx
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word[shipdata.totalNumberOfPoints] @split rotatedy
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word[shipdata.totalNumberOfPoints] @split rotatedz
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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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; set up the 3d rotation matrix values
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word wcosa = math.cos8(ax)
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word wsina = math.sin8(ax)
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word wcosb = math.cos8(ay)
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word wsinb = math.sin8(ay)
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word wcosc = math.cos8(az)
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word wsinc = math.sin8(az)
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word wcosa_sinb = wcosa*wsinb / 128
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word wsina_sinb = wsina*wsinb / 128
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word Axx = wcosa*wcosb / 128
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word Axy = (wcosa_sinb*wsinc - wsina*wcosc) / 128
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word Axz = (wcosa_sinb*wcosc + wsina*wsinc) / 128
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word Ayx = wsina*wcosb / 128
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word Ayy = (wsina_sinb*wsinc + wcosa*wcosc) / 128
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word Ayz = (wsina_sinb*wcosc - wcosa*wsinc) / 128
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word Azx = -wsinb
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word Azy = wcosb*wsinc / 128
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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 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*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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sub facing_away(ubyte edgePointsIdx) -> bool {
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; simplistic visibility determination by checking the Z component of the surface normal
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; TODO: actually take the line of sight vector into account
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@ -199,20 +217,6 @@ _ones pla
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word p3y = rotatedy[p3] / 128
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return (p2x-p3x)*(p1y-p3y) - (p2y-p3y)*(p1x-p3x) > 0
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}
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ubyte[shipdata.totalNumberOfEdges] edgestodraw
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sub draw_edge(ubyte edgeidx) {
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edgestodraw[edgeidx] = false
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ubyte vFrom = shipdata.edgesFrom[edgeidx]
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ubyte vTo = shipdata.edgesTo[edgeidx]
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word persp1 = 170 + rotatedz[vFrom]/256
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word persp2 = 170 + rotatedz[vTo]/256
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cx16.GRAPH_draw_line(rotatedx[vFrom] / persp1 + screen_width/2 as uword,
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rotatedy[vFrom] / persp1 + screen_height/2 as uword,
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rotatedx[vTo] / persp2 + screen_width/2 as uword,
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rotatedy[vTo] / persp2 + screen_height/2 as uword)
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}
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}
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shipdata {
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@ -3,6 +3,59 @@
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main {
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sub start() {
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uword anglex
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uword angley
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uword anglez
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repeat {
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matrix_math.rotate_vertices(msb(anglex), msb(angley), msb(anglez))
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txt.clear_screenchars(' ')
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draw_edges()
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anglex+=500
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angley+=215
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anglez+=453
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sys.waitvsync()
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}
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}
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sub draw_edges() {
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; plot the points of the 3d cube
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; first the points on the back, then the points on the front (painter algorithm)
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ubyte @zp i
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word @zp rz
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word @zp persp
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byte sx
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byte sy
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for i in 0 to len(matrix_math.xcoor)-1 {
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rz = matrix_math.rotatedz[i]
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if rz >= 10 {
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persp = 400 + rz/64
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sx = matrix_math.rotatedx[i] / persp as byte + txt.DEFAULT_WIDTH/2
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sy = matrix_math.rotatedy[i] / persp as byte + txt.DEFAULT_HEIGHT/2
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txt.setcc(sx as ubyte, sy as ubyte, 46, 7)
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}
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}
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for i in 0 to len(matrix_math.xcoor)-1 {
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rz = matrix_math.rotatedz[i]
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if rz < 10 {
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persp = 400 + rz/64
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sx = matrix_math.rotatedx[i] / persp as byte + txt.DEFAULT_WIDTH/2
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sy = matrix_math.rotatedy[i] / persp as byte + txt.DEFAULT_HEIGHT/2
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txt.setcc(sx as ubyte, sy as ubyte, 81, 7)
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}
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}
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}
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}
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matrix_math {
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%option verafxmuls ; accellerate all word-multiplications in this block using Vera FX hardware muls
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; vertices
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word[] @split xcoor = [ -40, -40, -40, -40, 40, 40, 40, 40 ]
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word[] @split ycoor = [ -40, -40, 40, 40, -40, -40, 40, 40 ]
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@ -13,24 +66,6 @@ main {
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word[len(ycoor)] @split rotatedy
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word[len(zcoor)] @split rotatedz
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sub start() {
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uword anglex
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uword angley
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uword anglez
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repeat {
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rotate_vertices(msb(anglex), msb(angley), msb(anglez))
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txt.clear_screenchars(' ')
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draw_edges()
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anglex+=500
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angley+=215
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anglez+=453
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sys.waitvsync()
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sys.waitvsync()
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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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@ -64,35 +99,4 @@ main {
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}
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}
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sub draw_edges() {
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; plot the points of the 3d cube
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; first the points on the back, then the points on the front (painter algorithm)
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ubyte @zp i
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word @zp rz
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word @zp persp
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byte sx
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byte sy
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for i in 0 to len(xcoor)-1 {
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rz = rotatedz[i]
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if rz >= 10 {
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persp = 400 + rz/64
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sx = rotatedx[i] / persp as byte + txt.DEFAULT_WIDTH/2
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sy = rotatedy[i] / persp as byte + txt.DEFAULT_HEIGHT/2
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txt.setcc(sx as ubyte, sy as ubyte, 46, 7)
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}
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}
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for i in 0 to len(xcoor)-1 {
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rz = rotatedz[i]
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if rz < 10 {
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persp = 400 + rz/64
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sx = rotatedx[i] / persp as byte + txt.DEFAULT_WIDTH/2
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sy = rotatedy[i] / persp as byte + txt.DEFAULT_HEIGHT/2
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txt.setcc(sx as ubyte, sy as ubyte, 81, 7)
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}
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}
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}
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}
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