source: [view]
var m = dojox.gfx3d.matrix, v = dojox.gfx3d.vector, mx = m.normalize(matrix),
f = m.multiplyPoint(mx, radius * Math.cos(from) + center.x, radius * Math.sin(from) + center.y, center.z),
t = m.multiplyPoint(mx, radius * Math.cos(to) + center.x, radius * Math.sin(to) + center.y, center.z),
c = m.multiplyPoint(mx, center.x, center.y, center.z), step = (to - from) / N, r = dist(f, t) / 2,
mod = model[material.type], fin = material.finish, pmt = material.color,
colors = [{offset: 0, color: mod.call(model, v.substract(f, c), fin, pmt)}];
for(var a = from + step; a < to; a += step){
var p = m.multiplyPoint(mx, radius * Math.cos(a) + center.x, radius * Math.sin(a) + center.y, center.z),
df = dist(f, p), dt = dist(t, p);
colors.push({offset: df / (df + dt), color: mod.call(model, v.substract(p, c), fin, pmt)});
}
colors.push({offset: 1, color: mod.call(model, v.substract(t, c), fin, pmt)});
return {type: "linear", x1: 0, y1: -r, x2: 0, y2: r, colors: colors};