Differential D15589 Diff 55385 intern/mikktspace/mikk_float3.hh

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intern/mikktspace/mikk_float3.hh

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				/* SPDX-License-Identifier: Apache-2.0 */

				/** \file
				* \ingroup mikktspace
				*/

				#pragma once

				#include <cmath>

				namespace mikk {

				struct float3 {
				float x, y, z;

				float3() = default;

				float3(const float *ptr) : x{ptr[0]}, y{ptr[1]}, z{ptr[2]}
				{
				}

				float3(const float (ptr)[3]) : float3((const float )ptr)
				{
				}

				explicit float3(float value) : x(value), y(value), z(value)
				{
				}

				explicit float3(int value) : x((float)value), y((float)value), z((float)value)
				{
				}

				float3(float x_, float y_, float z_) : x{x_}, y{y_}, z{z_}
				{
				}

				static float3 zero()
				{
				return {0.0f, 0.0f, 0.0f};
				}

				friend float3 operator*(const float3 &a, float b)
				{
				return {a.x * b, a.y * b, a.z * b};
				}

				friend float3 operator*(float b, const float3 &a)
				{
				return {a.x * b, a.y * b, a.z * b};
				}

				friend float3 operator-(const float3 &a, const float3 &b)
				{
				return {a.x - b.x, a.y - b.y, a.z - b.z};
				}

				friend float3 operator-(const float3 &a)
				{
				return {-a.x, -a.y, -a.z};
				}

				friend bool operator==(const float3 &a, const float3 &b)
				{
				return a.x == b.x && a.y == b.y && a.z == b.z;
				}

				float length_squared() const
				{
				return x * x + y * y + z * z;
				}

				float length() const
				{
				return sqrt(length_squared());
				}

				static float distance(const float3 &a, const float3 &b)
				{
				return (a - b).length();
				}

				friend float3 operator+(const float3 &a, const float3 &b)
				{
				return {a.x + b.x, a.y + b.y, a.z + b.z};
				}

				void operator+=(const float3 &b)
				{
				this->x += b.x;
				this->y += b.y;
				this->z += b.z;
				}

				friend float3 operator*(const float3 &a, const float3 &b)
				{
				return {a.x * b.x, a.y * b.y, a.z * b.z};
				}

				float3 normalize() const
				{
				const float len = length();
				return (len != 0.0f) ? this (1.0f / len) : *this;
				}

				float reduce_add() const
				{
				return x + y + z;
				}
				};

				inline float dot(const float3 &a, const float3 &b)
				{
				return a.x * b.x + a.y * b.y + a.z * b.z;
				}

				inline float distance(const float3 &a, const float3 &b)
				{
				return float3::distance(a, b);
				}

				/* Projects v onto the surface with normal n. */
				inline float3 project(const float3 &n, const float3 &v)
				{
				return (v - n * dot(n, v)).normalize();
				}

				} // namespace mikk