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contour.js
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"use strict"
var pool = require("typedarray-pool")
module.exports = createSurfaceExtractor
var allFns = {
"false,0,1": function surfaceProcedure(vertex, face, phase, mallocUint32, freeUint32) {
return function extractContour0_1(a0, x0, x1, x2) {
var s0 = a0.shape[0] | 0,
s1 = a0.shape[1] | 0,
d0 = a0.data,
o0 = a0.offset | 0,
t0_0 = a0.stride[0] | 0,
t0_1 = a0.stride[1] | 0,
p0 = o0,
c0_0,
d0_1 = -t0_0 | 0,
c0_1 = 0,
d0_2 = -t0_1 | 0,
c0_2 = 0,
d0_3 = (-t0_0 - t0_1) | 0,
c0_3 = 0,
u0_0 = t0_0 | 0,
u0_1 = (t0_1 - t0_0 * s0) | 0,
i0 = 0,
i1 = 0,
N = 0,
Q = (2 * s0) | 0,
P = mallocUint32(Q),
V = mallocUint32(Q),
X = 0,
b0 = 0,
e1 = -1 | 0,
y1 = -1 | 0,
b1 = 0,
e2 = -s0 | 0,
y2 = s0 | 0,
b2 = 0,
e3 = (-s0 - 1) | 0,
y3 = (s0 - 1) | 0,
b3 = 0,
v0 = 0,
T = 0
for (i0 = 0; i0 < s0; ++i0) {
P[X++] = phase(d0[p0], x0, x1, x2)
p0 += u0_0
}
p0 += u0_1
if (s1 > 0) {
i1 = 1
P[X++] = phase(d0[p0], x0, x1, x2)
p0 += u0_0
if (s0 > 0) {
i0 = 1
c0_0 = d0[p0]
b0 = P[X] = phase(c0_0, x0, x1, x2)
b1 = P[X + e1]
b2 = P[X + e2]
b3 = P[X + e3]
if (b0 !== b1 || b0 !== b2 || b0 !== b3) {
c0_1 = d0[p0 + d0_1]
c0_2 = d0[p0 + d0_2]
c0_3 = d0[p0 + d0_3]
vertex(i0, i1, c0_0, c0_1, c0_2, c0_3, b0, b1, b2, b3, x0, x1, x2)
v0 = V[X] = N++
}
X += 1
p0 += u0_0
for (i0 = 2; i0 < s0; ++i0) {
c0_0 = d0[p0]
b0 = P[X] = phase(c0_0, x0, x1, x2)
b1 = P[X + e1]
b2 = P[X + e2]
b3 = P[X + e3]
if (b0 !== b1 || b0 !== b2 || b0 !== b3) {
c0_1 = d0[p0 + d0_1]
c0_2 = d0[p0 + d0_2]
c0_3 = d0[p0 + d0_3]
vertex(i0, i1, c0_0, c0_1, c0_2, c0_3, b0, b1, b2, b3, x0, x1, x2)
v0 = V[X] = N++
if (b3 !== b1) {
face(V[X + e1], v0, c0_3, c0_1, b3, b1, x0, x1, x2)
}
}
X += 1
p0 += u0_0
}
}
p0 += u0_1
X = 0
T = e1
e1 = y1
y1 = T
T = e2
e2 = y2
y2 = T
T = e3
e3 = y3
y3 = T
for (i1 = 2; i1 < s1; ++i1) {
P[X++] = phase(d0[p0], x0, x1, x2)
p0 += u0_0
if (s0 > 0) {
i0 = 1
c0_0 = d0[p0]
b0 = P[X] = phase(c0_0, x0, x1, x2)
b1 = P[X + e1]
b2 = P[X + e2]
b3 = P[X + e3]
if (b0 !== b1 || b0 !== b2 || b0 !== b3) {
c0_1 = d0[p0 + d0_1]
c0_2 = d0[p0 + d0_2]
c0_3 = d0[p0 + d0_3]
vertex(i0, i1, c0_0, c0_1, c0_2, c0_3, b0, b1, b2, b3, x0, x1, x2)
v0 = V[X] = N++
if (b3 !== b2) {
face(V[X + e2], v0, c0_2, c0_3, b2, b3, x0, x1, x2)
}
}
X += 1
p0 += u0_0
for (i0 = 2; i0 < s0; ++i0) {
c0_0 = d0[p0]
b0 = P[X] = phase(c0_0, x0, x1, x2)
b1 = P[X + e1]
b2 = P[X + e2]
b3 = P[X + e3]
if (b0 !== b1 || b0 !== b2 || b0 !== b3) {
c0_1 = d0[p0 + d0_1]
c0_2 = d0[p0 + d0_2]
c0_3 = d0[p0 + d0_3]
vertex(i0, i1, c0_0, c0_1, c0_2, c0_3, b0, b1, b2, b3, x0, x1, x2)
v0 = V[X] = N++
if (b3 !== b2) {
face(V[X + e2], v0, c0_2, c0_3, b2, b3, x0, x1, x2)
}
if (b3 !== b1) {
face(V[X + e1], v0, c0_3, c0_1, b3, b1, x0, x1, x2)
}
}
X += 1
p0 += u0_0
}
}
if (i1 & 1) {
X = 0
}
T = e1
e1 = y1
y1 = T
T = e2
e2 = y2
y2 = T
T = e3
e3 = y3
y3 = T
p0 += u0_1
}
}
freeUint32(V)
freeUint32(P)
}
},
"false,1,0": function anonymous(vertex, face, phase, mallocUint32, freeUint32) {
return function extractContour1_0(a0, x0, x1, x2) {
var s0 = a0.shape[0] | 0,
s1 = a0.shape[1] | 0,
d0 = a0.data,
o0 = a0.offset | 0,
t0_0 = a0.stride[0] | 0,
t0_1 = a0.stride[1] | 0,
p0 = o0,
c0_0,
d0_1 = -t0_0 | 0,
c0_1 = 0,
d0_2 = -t0_1 | 0,
c0_2 = 0,
d0_3 = (-t0_0 - t0_1) | 0,
c0_3 = 0,
u0_1 = t0_1 | 0,
u0_0 = (t0_0 - t0_1 * s1) | 0,
i0 = 0,
i1 = 0,
N = 0,
Q = (2 * s1) | 0,
P = mallocUint32(Q),
V = mallocUint32(Q),
X = 0,
b0 = 0,
e2 = -1 | 0,
y2 = -1 | 0,
b2 = 0,
e1 = -s1 | 0,
y1 = s1 | 0,
b1 = 0,
e3 = (-s1 - 1) | 0,
y3 = (s1 - 1) | 0,
b3 = 0,
v0 = 0,
T = 0
for (i1 = 0; i1 < s1; ++i1) {
P[X++] = phase(d0[p0], x0, x1, x2)
p0 += u0_1
}
p0 += u0_0
if (s0 > 0) {
i0 = 1
P[X++] = phase(d0[p0], x0, x1, x2)
p0 += u0_1
if (s1 > 0) {
i1 = 1
c0_0 = d0[p0]
b0 = P[X] = phase(c0_0, x0, x1, x2)
b1 = P[X + e1]
b2 = P[X + e2]
b3 = P[X + e3]
if (b0 !== b1 || b0 !== b2 || b0 !== b3) {
c0_1 = d0[p0 + d0_1]
c0_2 = d0[p0 + d0_2]
c0_3 = d0[p0 + d0_3]
vertex(i0, i1, c0_0, c0_1, c0_2, c0_3, b0, b1, b2, b3, x0, x1, x2)
v0 = V[X] = N++
}
X += 1
p0 += u0_1
for (i1 = 2; i1 < s1; ++i1) {
c0_0 = d0[p0]
b0 = P[X] = phase(c0_0, x0, x1, x2)
b1 = P[X + e1]
b2 = P[X + e2]
b3 = P[X + e3]
if (b0 !== b1 || b0 !== b2 || b0 !== b3) {
c0_1 = d0[p0 + d0_1]
c0_2 = d0[p0 + d0_2]
c0_3 = d0[p0 + d0_3]
vertex(i0, i1, c0_0, c0_1, c0_2, c0_3, b0, b1, b2, b3, x0, x1, x2)
v0 = V[X] = N++
if (b3 !== b2) {
face(V[X + e2], v0, c0_2, c0_3, b2, b3, x0, x1, x2)
}
}
X += 1
p0 += u0_1
}
}
p0 += u0_0
X = 0
T = e1
e1 = y1
y1 = T
T = e2
e2 = y2
y2 = T
T = e3
e3 = y3
y3 = T
for (i0 = 2; i0 < s0; ++i0) {
P[X++] = phase(d0[p0], x0, x1, x2)
p0 += u0_1
if (s1 > 0) {
i1 = 1
c0_0 = d0[p0]
b0 = P[X] = phase(c0_0, x0, x1, x2)
b1 = P[X + e1]
b2 = P[X + e2]
b3 = P[X + e3]
if (b0 !== b1 || b0 !== b2 || b0 !== b3) {
c0_1 = d0[p0 + d0_1]
c0_2 = d0[p0 + d0_2]
c0_3 = d0[p0 + d0_3]
vertex(i0, i1, c0_0, c0_1, c0_2, c0_3, b0, b1, b2, b3, x0, x1, x2)
v0 = V[X] = N++
if (b3 !== b1) {
face(V[X + e1], v0, c0_3, c0_1, b3, b1, x0, x1, x2)
}
}
X += 1
p0 += u0_1
for (i1 = 2; i1 < s1; ++i1) {
c0_0 = d0[p0]
b0 = P[X] = phase(c0_0, x0, x1, x2)
b1 = P[X + e1]
b2 = P[X + e2]
b3 = P[X + e3]
if (b0 !== b1 || b0 !== b2 || b0 !== b3) {
c0_1 = d0[p0 + d0_1]
c0_2 = d0[p0 + d0_2]
c0_3 = d0[p0 + d0_3]
vertex(i0, i1, c0_0, c0_1, c0_2, c0_3, b0, b1, b2, b3, x0, x1, x2)
v0 = V[X] = N++
if (b3 !== b2) {
face(V[X + e2], v0, c0_2, c0_3, b2, b3, x0, x1, x2)
}
if (b3 !== b1) {
face(V[X + e1], v0, c0_3, c0_1, b3, b1, x0, x1, x2)
}
}
X += 1
p0 += u0_1
}
}
if (i0 & 1) {
X = 0
}
T = e1
e1 = y1
y1 = T
T = e2
e2 = y2
y2 = T
T = e3
e3 = y3
y3 = T
p0 += u0_0
}
}
freeUint32(V)
freeUint32(P)
}
},
}
//Generates the surface procedure
function compileSurfaceProcedure(vertexFunc, faceFunc, phaseFunc, scalarArgs, order, typesig) {
var key = [typesig, order].join(',')
var proc = allFns[key]
return proc(
vertexFunc,
faceFunc,
phaseFunc,
pool.mallocUint32,
pool.freeUint32)
}
function createSurfaceExtractor(args) {
function error(msg) {
throw new Error("ndarray-extract-contour: " + msg)
}
if(typeof args !== "object") {
error("Must specify arguments")
}
var order = args.order
if(!Array.isArray(order)) {
error("Must specify order")
}
var arrays = args.arrayArguments||1
if(arrays < 1) {
error("Must have at least one array argument")
}
var scalars = args.scalarArguments||0
if(scalars < 0) {
error("Scalar arg count must be > 0")
}
if(typeof args.vertex !== "function") {
error("Must specify vertex creation function")
}
if(typeof args.cell !== "function") {
error("Must specify cell creation function")
}
if(typeof args.phase !== "function") {
error("Must specify phase function")
}
var getters = args.getters || []
var typesig = new Array(arrays)
for(var i=0; i<arrays; ++i) {
if(getters.indexOf(i) >= 0) {
typesig[i] = true
} else {
typesig[i] = false
}
}
return compileSurfaceProcedure(
args.vertex,
args.cell,
args.phase,
scalars,
order,
typesig)
}