Death Star: Difference between revisions
Content added Content deleted
(Maple Version) |
(→{{header|Sidef}}: simplified the code to use the Vector class and added link to the output image) |
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{{trans|Perl}} |
{{trans|Perl}} |
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Writes a PGM to stdout. |
Writes a PGM to stdout. |
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<lang ruby>func |
<lang ruby>func hitf(sph, x, y) { |
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x -= sph[0] |
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| ⚫ | |||
} |
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var z = (sph[3]**2 - (x**2 + y**2)) |
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x -= sph[0]; |
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| ⚫ | |||
z < 0 && return nil |
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z < 0 && return nil; |
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z.sqrt! |
z.sqrt! |
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[sph[2] - z, sph[2] + z] |
[sph[2] - z, sph[2] + z] |
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} |
} |
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func normalize(v) { |
func normalize(v) { |
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v / v.abs |
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v »/» n; |
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} |
} |
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func dot(x, y) { |
func dot(x, y) { |
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max(0, x*y) |
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s > 0 ? s : 0; |
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} |
} |
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var pos = [120, 120, 0, 120] |
var pos = [120, 120, 0, 120] |
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var neg = [-77, -33, -100, 190] |
var neg = [-77, -33, -100, 190] |
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var light = normalize( |
var light = normalize(Vector(-12, 13, -10)) |
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func draw(k, amb) { |
func draw(k, amb) { |
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STDOUT.binmode(':raw') |
STDOUT.binmode(':raw') |
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print ("P5\n", pos[0]*2 + 3, " ", pos[1]*2 + 3, "\n255\n") |
print ("P5\n", pos[0]*2 + 3, " ", pos[1]*2 + 3, "\n255\n") |
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for y in ((pos[1] - pos[3] - 1) .. (pos[1] + pos[3] + 1)) { |
for y in ((pos[1] - pos[3] - 1) .. (pos[1] + pos[3] + 1)) { |
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var row = [] |
var row = [] |
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for x in ((pos[0] - pos[3] - 1) .. (pos[0] + pos[3] + 1)) { |
for x in ((pos[0] - pos[3] - 1) .. (pos[0] + pos[3] + 1)) { |
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| ⚫ | |||
var |
var hit = 0 |
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var |
var hs = [] |
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| ⚫ | |||
if (!h) { hit = 0; h = [0, 0] } |
if (!h) { hit = 0; h = [0, 0] } |
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elsif (hs[0] > h[0]) { hit = 1 } |
elsif (hs[0] > h[0]) { hit = 1 } |
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elsif (hs[1] > h[0]) { hit = (hs[1] > h[1] ? 0 : 2) } |
elsif (hs[1] > h[0]) { hit = (hs[1] > h[1] ? 0 : 2) } |
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else { hit = 1 } |
else { hit = 1 } |
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| ⚫ | |||
| ⚫ | |||
given(hit) { |
given(hit) { |
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when (0) { val = 0} |
when (0) { val = 0} |
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when (1) { v = |
when (1) { v = Vector(x-pos[0], y-pos[1], h[0]-pos[2]) } |
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default { v = |
default { v = Vector(neg[0]-x, neg[1]-y, neg[2]-hs[1]) } |
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} |
} |
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if (v) { |
if (defined(v)) { |
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v = normalize(v) |
v = normalize(v) |
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val = int((dot(v, light)**k + amb) * 255) |
val = int((dot(v, light)**k + amb) * 255) |
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val = (val > 255 ? 255 : (val < 0 ? 0 : val)) |
val = (val > 255 ? 255 : (val < 0 ? 0 : val)) |
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} |
} |
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row.append(val) |
row.append(val) |
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} |
} |
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print 'C*'.pack(row...) |
print 'C*'.pack(row...) |
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} |
} |
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} |
} |
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draw(2, 0.2) |
draw(2, 0.2)</lang> |
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Output image: [https://github.com/trizen/rc/blob/master/img/death_star_sidef.png here]. |
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=={{header|Tcl}}== |
=={{header|Tcl}}== |
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