-- primitives for saving to file and loading from file
function file_exists(filename)
local infile = App.open_for_reading(App.save_dir..filename)
if not infile then
infile = App.open_for_reading(App.source_dir..filename)
end
if infile then
infile:close()
return true
else
return false
end
end
-- the source editor supports only files in the save dir backed by the source dir
function load_from_disk(State)
local infile = App.open_for_reading(App.save_dir..State.filename)
if not infile then
infile = App.open_for_reading(App.source_dir..State.filename)
end
State.lines = load_from_file(infile)
if infile then infile:close() end
end
function load_from_file(infile)
local result = {}
if infile then
local infile_next_line = infile:lines() -- works with both Lua files and LÖVE Files (https://www.love2d.org/wiki/File)
while true do
local line = infile_next_line()
if line == nil then break end
if line == '```lines' then -- inflexible with whitespace since these files are always autogenerated
table.insert(result, load_drawing(infile_next_line))
else
table.insert(result, {mode='text', data=line})
end
end
end
if #result == 0 then
table.insert(result, {mode='text', data=''})
end
return result
end
function save_to_disk(State)
local outfile = App.open_for_writing(App.save_dir..State.filename)
if not outfile then
error('failed to write to "'..State.filename..'"')
end
for _,line in ipairs(State.lines) do
if line.mode == 'drawing' then
store_drawing(outfile, line)
else
outfile:write(line.data)
outfile:write('\n')
end
end
outfile:close()
end
function load_drawing(infile_next_line)
local drawing = {mode='drawing', h=256/2, points={}, shapes={}, pending={}}
while true do
local line = infile_next_line()
assert(line, 'drawing in file is incomplete')
if line == '```' then break end
local shape = json.decode(line)
if shape.mode == 'freehand' then
-- no changes needed
elseif shape.mode == 'line' or shape.mode == 'manhattan' then
local name = shape.p1.name
shape.p1 = Drawing.find_or_insert_point(drawing.points, shape.p1.x, shape.p1.y, --[[large width to minimize overlap]] 1600)
drawing.points[shape.p1].name = name
name = shape.p2.name
shape.p2 = Drawing.find_or_insert_point(drawing.points, shape.p2.x, shape.p2.y, --[[large width to minimize overlap]] 1600)
drawing.points[shape.p2].name = name
elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then
for i,p in ipairs(shape.vertices) do
local name = p.name
shape.vertices[i] = Drawing.find_or_insert_point(drawing.points, p.x,p.y, --[[large width to minimize overlap]] 1600)
drawing.points[shape.vertices[i]].name = name
end
elseif shape.mode == 'circle' or shape.mode == 'arc' then
local name = shape.center.name
shape.center = Drawing.find_or_insert_point(drawing.points, shape.center.x,shape.center.y, --[[large width to minimize overlap]] 1600)
drawing.points[shape.center].name = name
elseif shape.mode == 'deleted' then
-- ignore
else
assert(false, ('unknown drawing mode %s'):format(shape.mode))
end
table.insert(drawing.shapes, shape)
end
return drawing
end
function store_drawing(outfile, drawing)
outfile:write('```lines\n')
for _,shape in ipairs(drawing.shapes) do
if shape.mode == 'freehand' then
outfile:write(json.encode(shape))
outfile:write('\n')
elseif shape.mode == 'line' or shape.mode == 'manhattan' then
local line = json.encode({mode=shape.mode, p1=drawing.points[shape.p1], p2=drawing.points[shape.p2]})
outfile:write(line)
outfile:write('\n')
elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then
local obj = {mode=shape.mode, vertices={}}
for _,p in ipairs(shape.vertices) do
table.insert(obj.vertices, drawing.points[p])
end
local line = json.encode(obj)
outfile:write(line)
outfile:write('\n')
elseif shape.mode == 'circle' then
outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius}))
outfile:write('\n')
elseif shape.mode == 'arc' then
outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius, start_angle=shape.start_angle, end_angle=<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - apps/raytracing/vec.mu</title>
<meta name="Generator" content="Vim/8.1">
<meta name="plugin-version" content="vim8.1_v1">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.CommentedCode { color: #8a8a8a; }
.muComment { color: #005faf; }
.LineNr { }
.SpecialChar { color: #d70000; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
.PreProc { color: #c000c0; }
-->
</style>
<script type='text/javascript'>
<!--
/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
var lineNum;
lineNum = window.location.hash;
lineNum = lineNum.substr(1); /* strip off '#' */
if (lineNum.indexOf('L') == -1) {
lineNum = 'L'+lineNum;
}
var lineElem = document.getElementById(lineNum);
/* Always jump to new location even if the line was hidden inside a fold, or
* we corrected the raw number to a line ID.
*/
if (lineElem) {
lineElem.scrollIntoView(true);
}
return true;
}
if ('onhashchange' in window) {
window.onhashchange = JumpToLine;
}
-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/apps/raytracing/vec.mu'>https://github.com/akkartik/mu/blob/main/apps/raytracing/vec.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="PreProc">type</span> vec3 <span class="Delimiter">{</span>
<span id="L2" class="LineNr"> 2 </span> x: float
<span id="L3" class="LineNr"> 3 </span> y: float
<span id="L4" class="LineNr"> 4 </span> z: float
<span id="L5" class="LineNr"> 5 </span><span class="Delimiter">}</span>
<span id="L6" class="LineNr"> 6 </span>
<span id="L7" class="LineNr"> 7 </span><span class="PreProc">fn</span> <span class="muFunction">print-vec3</span> <a href='../../405screen.mu.html#L9'>screen</a>: (addr <a href='../../405screen.mu.html#L9'>screen</a>), _v: (addr vec3) <span class="Delimiter">{</span>
<span id="L8" class="LineNr"> 8 </span> <span class="PreProc">var</span> v/<span class="Constant">esi</span>: (addr vec3) <span class="SpecialChar"><-</span> copy _v
<span id="L9" class="LineNr"> 9 </span> <a href='../../405screen.mu.html#L169'>print-string</a> <a href='../../405screen.mu.html#L9'>screen</a>, <span class="Constant">"("</span>
<span id="L10" class="LineNr"> 10 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr float) <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, x
<span id="L11" class="LineNr"> 11 </span> <a href='../../409print-float-hex.mu.html#L118'>print-float-hex</a> <a href='../../405screen.mu.html#L9'>screen</a>, *tmp
<span id="L12" class="LineNr"> 12 </span> <a href='../../405screen.mu.html#L169'>print-string</a> <a href='../../405screen.mu.html#L9'>screen</a>, <span class="Constant">", "</span>
<span id="L13" class="LineNr"> 13 </span> tmp <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, y
<span id="L14" class="LineNr"> 14 </span> <a href='../../409print-float-hex.mu.html#L118'>print-float-hex</a> <a href='../../405screen.mu.html#L9'>screen</a>, *tmp
<span id="L15" class="LineNr"> 15 </span> <a href='../../405screen.mu.html#L169'>print-string</a> <a href='../../405screen.mu.html#L9'>screen</a>, <span class="Constant">", "</span>
<span id="L16" class="LineNr"> 16 </span> tmp <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, z
<span id="L17" class="LineNr"> 17 </span> <a href='../../409print-float-hex.mu.html#L118'>print-float-hex</a> <a href='../../405screen.mu.html#L9'>screen</a>, *tmp
<span id="L18" class="LineNr"> 18 </span> <a href='../../405screen.mu.html#L169'>print-string</a> <a href='../../405screen.mu.html#L9'>screen</a>, <span class="Constant">")"</span>
<span id="L19" class="LineNr"> 19 </span><span class="Delimiter">}</span>
<span id="L20" class="LineNr"> 20 </span>
<span id="L21" class="LineNr"> 21 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-add-to</span> _v1: (addr vec3), _v2: (addr vec3) <span class="Delimiter">{</span>
<span id="L22" class="LineNr"> 22 </span> <span class="PreProc">var</span> v1/<span class="Constant">edi</span>: (addr vec3) <span class="SpecialChar"><-</span> copy _v1
<span id="L23" class="LineNr"> 23 </span> <span class="PreProc">var</span> v2/<span class="Constant">esi</span>: (addr vec3) <span class="SpecialChar"><-</span> copy _v2
<span id="L24" class="LineNr"> 24 </span> <span class="muComment"># v1.x += v2.x</span>
<span id="L25" class="LineNr"> 25 </span> <span class="PreProc">var</span> arg1/<span class="Constant">eax</span>: (addr float) <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v1, x
<span id="L26" class="LineNr"> 26 </span> <span class="PreProc">var</span> arg2/<span class="Constant">ecx</span>: (addr float) <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v2, x
<span id="L27" class="LineNr"> 27 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="SpecialChar"><-</span> copy *arg1
<span id="L28" class="LineNr"> 28 </span> result <span class="SpecialChar"><-</span> add *arg2
<span id="L29" class="LineNr"> 29 </span> copy-to *arg1, result
<span id="L30" class="LineNr"> 30 </span> <span class="muComment"># v1.y += v2.y</span>
<span id="L31" class="LineNr"> 31 </span> arg1 <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v1, y
<span id="L32" class="LineNr"> 32 </span> arg2 <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v2, y
<span id="L33" class="LineNr"> 33 </span> result <span class="SpecialChar"><-</span> copy *arg1
<span id="L34" class="LineNr"> 34 </span> result <span class="SpecialChar"><-</span> add *arg2
<span id="L35" class="LineNr"> 35 </span> copy-to *arg1, result
<span id="L36" class="LineNr"> 36 </span> <span class="muComment"># v1.z += v2.z</span>
<span id="L37" class="LineNr"> 37 </span> arg1 <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v1, z
<span id="L38" class="LineNr"> 38 </span> arg2 <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v2, z
<span id="L39" class="LineNr"> 39 </span> result <span class="SpecialChar"><-</span> copy *arg1
<span id="L40" class="LineNr"> 40 </span> result <span class="SpecialChar"><-</span> add *arg2
<span id="L41" class="LineNr"> 41 </span> copy-to *arg1, result
<span id="L42" class="LineNr"> 42 </span><span class="Delimiter">}</span>
<span id="L43" class="LineNr"> 43 </span>
<span id="L44" class="LineNr"> 44 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-subtract-from</span> v1: (addr vec3), v2: (addr vec3) <span class="Delimiter">{</span>
<span id="L45" class="LineNr"> 45 </span> <span class="PreProc">var</span> tmp-storage: vec3
<span id="L46" class="LineNr"> 46 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr vec3) <span class="SpecialChar"><-</span> address tmp-storage
<span id="L47" class="LineNr"> 47 </span> copy-object v2, tmp
<span id="L48" class="LineNr"> 48 </span> vec3-negate tmp
<span id="L49" class="LineNr"> 49 </span> vec3-add-to v1, tmp
<span id="L50" class="LineNr"> 50 </span><span class="Delimiter">}</span>
<span id="L51" class="LineNr"> 51 </span>
<span id="L52" class="LineNr"> 52 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-negate</span> v: (addr vec3) <span class="Delimiter">{</span>
<span id="L53" class="LineNr"> 53 </span> <span class="PreProc">var</span> negative-one/<span class="Constant">eax</span>: int <span class="SpecialChar"><-</span> copy <span class="Constant">-1</span>
<span id="L54" class="LineNr"> 54 </span> <span class="PreProc">var</span> negative-one-f/<span class="Constant">xmm0</span>: float <span class="SpecialChar"><-</span> convert negative-one
<span id="L55" class="LineNr"> 55 </span> vec3-scale-up v, negative-one-f
<span id="L56" class="LineNr"> 56 </span><span class="Delimiter">}</span>
<span id="L57" class="LineNr"> 57 </span>
<span id="L58" class="LineNr"> 58 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-scale-up</span> _v: (addr vec3), f: float <span class="Delimiter">{</span>
<span id="L59" class="LineNr"> 59 </span> <span class="PreProc">var</span> v/<span class="Constant">edi</span>: (addr vec3) <span class="SpecialChar"><-</span> copy _v
<span id="L60" class="LineNr"> 60 </span> <span class="muComment"># v.x *= f</span>
<span id="L61" class="LineNr"> 61 </span> <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr float) <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, x
<span id="L62" class="LineNr"> 62 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="SpecialChar"><-</span> copy *dest
<span id="L63" class="LineNr"> 63 </span> result <span class="SpecialChar"><-</span> multiply f
<span id="L64" class="LineNr"> 64 </span> copy-to *dest, result
<span id="L65" class="LineNr"> 65 </span> <span class="muComment"># v.y *= f</span>
<span id="L66" class="LineNr"> 66 </span> dest <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, y
<span id="L67" class="LineNr"> 67 </span> result <span class="SpecialChar"><-</span> copy *dest
<span id="L68" class="LineNr"> 68 </span> result <span class="SpecialChar"><-</span> multiply f
<span id="L69" class="LineNr"> 69 </span> copy-to *dest, result
<span id="L70" class="LineNr"> 70 </span> <span class="muComment"># v.z *= f</span>
<span id="L71" class="LineNr"> 71 </span> dest <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, z
<span id="L72" class="LineNr"> 72 </span> result <span class="SpecialChar"><-</span> copy *dest
<span id="L73" class="LineNr"> 73 </span> result <span class="SpecialChar"><-</span> multiply f
<span id="L74" class="LineNr"> 74 </span> copy-to *dest, result
<span id="L75" class="LineNr"> 75 </span><span class="Delimiter">}</span>
<span id="L76" class="LineNr"> 76 </span>
<span id="L77" class="LineNr"> 77 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-scale-down</span> _v: (addr vec3), f: float <span class="Delimiter">{</span>
<span id="L78" class="LineNr"> 78 </span> <span class="PreProc">var</span> v/<span class="Constant">edi</span>: (addr vec3) <span class="SpecialChar"><-</span> copy _v
<span id="L79" class="LineNr"> 79 </span> <span class="muComment"># v.x /= f</span>
<span id="L80" class="LineNr"> 80 </span> <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr float) <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, x
<span id="L81" class="LineNr"> 81 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="SpecialChar"><-</span> copy *dest
<span id="L82" class="LineNr"> 82 </span> result <span class="SpecialChar"><-</span> divide f
<span id="L83" class="LineNr"> 83 </span> copy-to *dest, result
<span id="L84" class="LineNr"> 84 </span> <span class="muComment"># v.y /= f</span>
<span id="L85" class="LineNr"> 85 </span> dest <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, y
<span id="L86" class="LineNr"> 86 </span> result <span class="SpecialChar"><-</span> copy *dest
<span id="L87" class="LineNr"> 87 </span> result <span class="SpecialChar"><-</span> divide f
<span id="L88" class="LineNr"> 88 </span> copy-to *dest, result
<span id="L89" class="LineNr"> 89 </span> <span class="muComment"># v.z /= f</span>
<span id="L90" class="LineNr"> 90 </span> dest <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, z
<span id="L91" class="LineNr"> 91 </span> result <span class="SpecialChar"><-</span> copy *dest
<span id="L92" class="LineNr"> 92 </span> result <span class="SpecialChar"><-</span> divide f
<span id="L93" class="LineNr"> 93 </span> copy-to *dest, result
<span id="L94" class="LineNr"> 94 </span><span class="Delimiter">}</span>
<span id="L95" class="LineNr"> 95 </span>
<span id="L96" class="LineNr"> 96 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-unit</span> in: (addr vec3), out: (addr vec3) <span class="Delimiter">{</span>
<span id="L97" class="LineNr"> 97 </span> <span class="PreProc">var</span> len/<span class="Constant">xmm0</span>: float <span class="SpecialChar"><-</span> vec3-length in
<span id="L98" class="LineNr"> 98 </span><span class="CommentedCode">#? print-string 0, "len: "</span>
<span id="L99" class="LineNr"> 99 </span><span class="CommentedCode">#? print-float-hex 0, len</span>
<span id="L100" class="LineNr">100 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L101" class="LineNr">101 </span> copy-object in, out
<span id="L102" class="LineNr">102 </span> vec3-scale-down out, len
<span id="L103" class="LineNr">103 </span><span class="Delimiter">}</span>
<span id="L104" class="LineNr">104 </span>
<span id="L105" class="LineNr">105 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-length</span> v: (addr vec3)<span class="PreProc"> -> </span>_/<span class="Constant">xmm0</span>: float <span class="Delimiter">{</span>
<span id="L106" class="LineNr">106 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="SpecialChar"><-</span> vec3-length-squared v
<span id="L107" class="LineNr">107 </span> result <span class="SpecialChar"><-</span> square-root result
<span id="L108" class="LineNr">108 </span> <span class="PreProc">return</span> result
<span id="L109" class="LineNr">109 </span><span class="Delimiter">}</span>
<span id="L110" class="LineNr">110 </span>
<span id="L111" class="LineNr">111 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-length-squared</span> _v: (addr vec3)<span class="PreProc"> -> </span>_/<span class="Constant">xmm0</span>: float <span class="Delimiter">{</span>
<span id="L112" class="LineNr">112 </span> <span class="PreProc">var</span> v/<span class="Constant">esi</span>: (addr vec3) <span class="SpecialChar"><-</span> copy _v
<span id="L113" class="LineNr">113 </span> <span class="muComment"># result = v.x * v.x</span>
<span id="L114" class="LineNr">114 </span> <span class="PreProc">var</span> src/<span class="Constant">eax</span>: (addr float) <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, x
<span id="L115" class="LineNr">115 </span> <span class="PreProc">var</span> tmp/<span class="Constant">xmm1</span>: float <span class="SpecialChar"><-</span> copy *src
<span id="L116" class="LineNr">116 </span> tmp <span class="SpecialChar"><-</span> multiply tmp
<span id="L117" class="LineNr">117 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="SpecialChar"><-</span> copy tmp
<span id="L118" class="LineNr">118 </span> <span class="muComment"># result += v.y * v.y</span>
<span id="L119" class="LineNr">119 </span> src <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, y
<span id="L120" class="LineNr">120 </span> tmp <span class="SpecialChar"><-</span> copy *src
<span id="L121" class="LineNr">121 </span> tmp <span class="SpecialChar"><-</span> multiply tmp
<span id="L122" class="LineNr">122 </span> result <span class="SpecialChar"><-</span> add tmp
<span id="L123" class="LineNr">123 </span> <span class="muComment"># result += v.z * v.z</span>
<span id="L124" class="LineNr">124 </span> src <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> v, z
<span id="L125" class="LineNr">125 </span> tmp <span class="SpecialChar"><-</span> copy *src
<span id="L126" class="LineNr">126 </span> tmp <span class="SpecialChar"><-</span> multiply tmp
<span id="L127" class="LineNr">127 </span> result <span class="SpecialChar"><-</span> add tmp
<span id="L128" class="LineNr">128 </span> <span class="PreProc">return</span> result
<span id="L129" class="LineNr">129 </span><span class="Delimiter">}</span>
<span id="L130" class="LineNr">130 </span>
<span id="L131" class="LineNr">131 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='vec.mu.html#L131'>vec3-dot</a></span> _v1: (addr vec3), _v2: (addr vec3)<span class="PreProc"> -> </span>_/<span class="Constant">xmm0</span>: float <span class="Delimiter">{</span>
<span id="L132" class="LineNr">132 </span><span class="Delimiter">}</span>
<span id="L133" class="LineNr">133 </span>
<span id="L134" class="LineNr">134 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='vec.mu.html#L134'>vec3-cross</a></span> _v1: (addr vec3), _v2: (addr vec3), out: (addr vec3) <span class="Delimiter">{</span>
<span id="L135" class="LineNr">135 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->