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import TestLib;
StartTest("trans");
// Ensure the same test each time.
srand(3456);
pair randompair()
{
return (unitrand(),unitrand());
}
path randombox()
{
return box(randompair(), randompair());
}
// For now, only tests transforms which take axes to axes.
transform randomtrans()
{
return rotate(90 * (rand() % 4)) * shift(unitrand(), unitrand());
}
real tolerance = 1e-4;
void testpic(int objs, int trans)
{
path[] pp;
picture orig;
for (int i = 0; i < objs; ++i) {
pp.push(randombox());
fill(orig, pp[i]);
}
picture pic = orig;
transform t = identity();
for (int i = 0; i < trans; ++i)
{
transform tt = randomtrans();
pic = tt * pic;
t = tt * t;
}
pair m = pic.userMin2(), M = pic.userMax2();
pair pm = min(t * pp), pM = max(t * pp);
assert(abs(m-pm) < tolerance);
assert(abs(M-pM) < tolerance);
}
for (int i = 0; i < 100; ++i)
testpic(1,1);
for (int i = 0; i < 100; ++i)
testpic(1,1);
for (int i = 0; i < 100; ++i)
testpic(3,1);
for (int i = 0; i < 100; ++i)
testpic(1,2);
for (int i = 0; i < 100; ++i)
testpic(2,2);
for (int i = 0; i < 100; ++i)
testpic(3,2);
for (int i = 0; i < 100; ++i)
testpic(3,4);
for (int i = 0; i < 100; ++i)
testpic(1,4);
for (int i = 0; i < 100; ++i)
testpic(2,4);
for (int i = 0; i < 100; ++i)
testpic(3,4);
for (int i = 0; i < 100; ++i)
testpic(3,4);
EndTest();
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