a69cc9f13d
Since Embree v3.13.0 supports AARCH64, switch back to the
official repo instead of using Embree-aarch64.
`thirdparty/embree/patches/godot-changes.patch` should now contain
an accurate diff of the changes done to the library.
(cherry picked from commit 767e374dce)
85 lines
2.6 KiB
C++
85 lines
2.6 KiB
C++
// Copyright 2009-2021 Intel Corporation
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
#pragma once
|
|
|
|
#include "../common/geometry.h"
|
|
|
|
namespace embree
|
|
{
|
|
static const size_t MAX_PATCH_VALENCE = 16; //!< maximum number of vertices of a patch
|
|
static const size_t MAX_RING_FACE_VALENCE = 64; //!< maximum number of faces per ring
|
|
static const size_t MAX_RING_EDGE_VALENCE = 2*64; //!< maximum number of edges per ring
|
|
|
|
class CatmullClarkPrecomputedCoefficients
|
|
{
|
|
private:
|
|
|
|
float table_cos_2PI_div_n[MAX_RING_FACE_VALENCE+1];
|
|
|
|
float* table_limittangent_a[MAX_RING_FACE_VALENCE+1];
|
|
float* table_limittangent_b[MAX_RING_FACE_VALENCE+1];
|
|
float table_limittangent_c[MAX_RING_FACE_VALENCE+1];
|
|
|
|
__forceinline float set_cos_2PI_div_n(const size_t n) {
|
|
if (unlikely(n == 0)) return 1.0f;
|
|
return cosf(2.0f*float(pi)/(float)n);
|
|
}
|
|
|
|
__forceinline float set_limittangent_a(const size_t i, const size_t n)
|
|
{
|
|
if (unlikely(n == 0)) return 1.0f;
|
|
const float c0 = 1.0f/(float)n * 1.0f / sqrtf(4.0f + cosf(float(pi)/(float)n)*cosf(float(pi)/(float)n));
|
|
const float c1 = (1.0f/(float)n + cosf(float(pi)/(float)n) * c0);
|
|
return cosf(2.0f*float(pi)*(float)i/(float)n) * c1;
|
|
}
|
|
|
|
__forceinline float set_limittangent_b(const size_t i, const size_t n)
|
|
{
|
|
if (unlikely(n == 0)) return 1.0f;
|
|
const float c0 = 1.0f/(float)n * 1.0f / sqrtf(4.0f + cosf(float(pi)/(float)n)*cosf(float(pi)/(float)n));
|
|
return cosf((2.0f*float(pi)*i+float(pi))/(float)n) * c0;
|
|
}
|
|
|
|
__forceinline float set_limittangent_c(const size_t n)
|
|
{
|
|
if (unlikely(n == 0)) return 1.0f;
|
|
return 2.0f/16.0f * (5.0f + cosf(2.0f*float(pi)/(float)n) + cosf(float(pi)/(float)n) * sqrtf(18.0f+2.0f*cosf(2.0f*float(pi)/(float)n)));
|
|
}
|
|
|
|
public:
|
|
|
|
__forceinline float cos_2PI_div_n(const size_t n)
|
|
{
|
|
if (likely(n <= MAX_RING_FACE_VALENCE))
|
|
return table_cos_2PI_div_n[n];
|
|
else
|
|
return set_cos_2PI_div_n(n);
|
|
}
|
|
|
|
__forceinline float limittangent_a(const size_t i, const size_t n)
|
|
{
|
|
assert(n <= MAX_RING_FACE_VALENCE);
|
|
assert(i < n);
|
|
return table_limittangent_a[n][i];
|
|
}
|
|
|
|
__forceinline float limittangent_b(const size_t i, const size_t n)
|
|
{
|
|
assert(n <= MAX_RING_FACE_VALENCE);
|
|
assert(i < n);
|
|
return table_limittangent_b[n][i];
|
|
}
|
|
|
|
__forceinline float limittangent_c(const size_t n)
|
|
{
|
|
assert(n <= MAX_RING_FACE_VALENCE);
|
|
return table_limittangent_c[n];
|
|
}
|
|
|
|
static CatmullClarkPrecomputedCoefficients table;
|
|
|
|
CatmullClarkPrecomputedCoefficients();
|
|
~CatmullClarkPrecomputedCoefficients();
|
|
};
|
|
}
|