// File: /workspace/github_cpp_makefile_star2_O3/tomfunkhouser[P]gaps/pkgs/R2Shapes/R2Polygon.cpp
// Function: gaps::R2Polygon::InteriorAngle(int, double) const
RNAngle R2Polygon::
InteriorAngle(int k, RNLength radius) const
{
  // Just checking
  if (npoints < 3) return 0;

  // Find first point
  R2Point *pointA = &points[(k - 1 + npoints) % npoints];
  if (radius > 0) {
    R2Point *prev = pointA;
    RNLength distance = R2Distance(*pointA, points[k]);
    if (distance < radius) {
      for (int i = 2;  i < npoints/3; i++) {
        pointA = &points[(k - i + npoints) % npoints];
        distance += R2Distance(*pointA, *prev);
        if (distance >= radius) break;
        prev = pointA;
      }
    }
  }

  // Find second point
  R2Point *pointB = &points[(k + 1) % npoints];
  if (radius > 0) {
    R2Point *prev = pointB;
    RNLength distance = R2Distance(*pointB, points[k]);
    if (distance < radius) {
      for (int i = 2;  i < npoints/3; i++) {
        pointB = &points[(k + i) % npoints];
        distance += R2Distance(*pointB, *prev);
        if (distance >= radius) break;
        prev = pointB;
      }
    }
  }

  // Compute interior angle
  R2Vector va = *pointA - points[k];
  R2Vector vb = *pointB - points[k];
  RNLength lena = va.Length();
  RNLength lenb = vb.Length();
  if (RNIsZero(lena) || RNIsZero(lenb)) return RN_UNKNOWN;
  RNAngle angle = R2InteriorAngle(va, vb);
  RNScalar cross = (va[0]*vb[1] - va[1]*vb[0]);
  if (clockwise) { if (cross < 0) angle = RN_TWO_PI - angle; }
  else { if (cross > 0) angle = RN_TWO_PI - angle; }
  return angle;
}

// Assembly:
movapd %xmm0, %xmm1
movl 0x10(%rdi), %ecx
xorpd %xmm0, %xmm0
cmpl $0x3, %ecx
jl 0x6448a
pushq %rbp
pushq %r15
pushq %r14
pushq %r13
pushq %r12
pushq %rbx
subq $0x38, %rsp
movl %esi, %r15d
movq %rdi, %rbx
movq 0x8(%rdi), %r13
leal (%r15,%rcx), %eax
decl %eax
cltd
idivl %ecx
movslq %edx, %r14
shlq $0x4, %r14
addq %r13, %r14
xorpd %xmm0, %xmm0
ucomisd %xmm0, %xmm1
jbe 0x642f7
movslq %r15d, %r12
movq %r12, %rbp
shlq $0x4, %rbp
addq %rbp, %r13
movq %r14, %rdi
movq %r13, %rsi
movsd %xmm1, 0x8(%rsp)
callq 0x6c52b
movsd 0x8(%rsp), %xmm1
ucomisd %xmm0, %xmm1
jbe 0x64310
movq %rbp, 0x10(%rsp)
movl 0x10(%rbx), %ecx
cmpl $0x9, %ecx
jl 0x642e9
leal -0x2(%r15), %r13d
movl $0x2, %ebp
movsd %xmm0, (%rsp)
movq %r14, %rsi
leal (%rcx,%r13), %eax
cltd
idivl %ecx
movslq %edx, %r14
shlq $0x4, %r14
addq 0x8(%rbx), %r14
movq %r14, %rdi
callq 0x6c52b
addsd (%rsp), %xmm0
ucomisd 0x8(%rsp), %xmm0
movl 0x10(%rbx), %ecx
jae 0x642e9
incl %ebp
movslq %ecx, %rax
imulq $0x55555556, %rax, %rax # imm = 0x55555556
movq %rax, %rdx
shrq $0x3f, %rdx
shrq $0x20, %rax
addl %edx, %eax
decl %r13d
cmpl %eax, %ebp
jl 0x64297
leal 0x1(%r15), %eax
cltd
idivl %ecx
movq 0x10(%rsp), %rbp
jmp 0x64318
leal 0x1(%r15), %eax
cltd
idivl %ecx
movslq %edx, %rax
shlq $0x4, %rax
addq %rax, %r13
movslq %r15d, %r12
jmp 0x643a3
leal 0x1(%r15), %eax
cltd
idivl 0x10(%rbx)
movq 0x8(%rbx), %rax
movslq %edx, %r13
shlq $0x4, %r13
addq %rax, %r13
addq %rax, %rbp
movq %r13, %rdi
movq %rbp, %rsi
callq 0x6c52b
movsd 0x8(%rsp), %xmm1
ucomisd %xmm0, %xmm1
seta %al
movl 0x10(%rbx), %ecx
cmpl $0x9, %ecx
setge %dl
andb %al, %dl
cmpb $0x1, %dl
jne 0x643a3
movl $0x2, %ebp
movq %r13, %rsi
movsd %xmm0, (%rsp)
leal (%r15,%rbp), %eax
cltd
idivl %ecx
movslq %edx, %r13
shlq $0x4, %r13
addq 0x8(%rbx), %r13
movq %r13, %rdi
callq 0x6c52b
addsd (%rsp), %xmm0
ucomisd 0x8(%rsp), %xmm0
jae 0x643a3
incl %ebp
movslq 0x10(%rbx), %rcx
imulq $0x55555556, %rcx, %rax # imm = 0x55555556
movq %rax, %rdx
shrq $0x3f, %rdx
shrq $0x20, %rax
addl %edx, %eax
cmpl %eax, %ebp
jl 0x64356
shlq $0x4, %r12
movq 0x8(%rbx), %rdx
addq %r12, %rdx
leaq 0x28(%rsp), %r15
movq %r15, %rdi
movq %r14, %rsi
callq 0x682e3
addq 0x8(%rbx), %r12
leaq 0x18(%rsp), %r14
movq %r14, %rdi
movq %r13, %rsi
movq %r12, %rdx
callq 0x682e3
movq %r15, %rdi
callq 0x68476
movsd %xmm0, (%rsp)
movq %r14, %rdi
callq 0x68476
movsd (%rsp), %xmm4
movapd %xmm0, %xmm1
leaq 0x8179e(%rip), %rax     # 0xe5b98
movsd (%rax), %xmm2
movapd 0x3dc1a(%rip), %xmm3    # 0xa2020
xorpd %xmm2, %xmm3
ucomisd %xmm3, %xmm4
movsd 0x3dc32(%rip), %xmm0    # 0xa2048
jb 0x6441e
ucomisd %xmm4, %xmm2
jae 0x6447c
ucomisd %xmm3, %xmm1
jb 0x6442a
ucomisd %xmm1, %xmm2
jae 0x6447c
leaq 0x28(%rsp), %r14
leaq 0x18(%rsp), %r15
movq %r14, %rdi
movq %r15, %rsi
callq 0x6d0b8
movsd (%r14), %xmm1
movsd (%r15), %xmm2
mulsd 0x8(%r14), %xmm2
mulsd 0x8(%r15), %xmm1
subsd %xmm2, %xmm1
cmpl $0x0, 0x40(%rbx)
je 0x6448b
xorpd %xmm2, %xmm2
ucomisd %xmm1, %xmm2
jbe 0x6447c
leaq 0x45b78(%rip), %rax     # 0xa9fe8
movsd (%rax), %xmm1
subsd %xmm0, %xmm1
movapd %xmm1, %xmm0
addq $0x38, %rsp
popq %rbx
popq %r12
popq %r13
popq %r14
popq %r15
popq %rbp
retq
xorpd %xmm2, %xmm2
ucomisd %xmm2, %xmm1
ja 0x64469
jmp 0x6447c
nop