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//-----------------------------------------------------------------------------
// Name: vec3math.h
// Developer: Wolfire Games LLC
// Description:
// License: Read below
//-----------------------------------------------------------------------------
//
// Copyright 2022 Wolfire Games LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//-----------------------------------------------------------------------------
#pragma once
#include <Math/vec3.h>
inline vec3 &operator+=(vec3 &vec, const vec3 ¶m) {
vec.entries[0] += param.entries[0];
vec.entries[1] += param.entries[1];
vec.entries[2] += param.entries[2];
return vec;
}
inline vec3 &operator-=(vec3 &vec, const vec3 ¶m) {
vec.entries[0] -= param.entries[0];
vec.entries[1] -= param.entries[1];
vec.entries[2] -= param.entries[2];
return vec;
}
inline vec3 &operator*=(vec3 &vec, float param) {
vec.entries[0] *= param;
vec.entries[1] *= param;
vec.entries[2] *= param;
return vec;
}
inline vec3 &operator*=(vec3 &vec, const vec3 ¶m) {
vec.entries[0] *= param.entries[0];
vec.entries[1] *= param.entries[1];
vec.entries[2] *= param.entries[2];
return vec;
}
inline vec3 &operator/=(vec3 &vec, float param) {
vec.entries[0] /= param;
vec.entries[1] /= param;
vec.entries[2] /= param;
return vec;
}
inline bool operator!=(const vec3 &vec, const vec3 ¶m) {
return (vec.entries[0] != param.entries[0] ||
vec.entries[1] != param.entries[1] ||
vec.entries[2] != param.entries[2]);
}
inline bool operator!=(const vec3 &vec, float param) {
return (vec.entries[0] != param ||
vec.entries[1] != param ||
vec.entries[2] != param);
}
inline vec3 operator+(const vec3 &vec_a, const vec3 &vec_b) {
vec3 vec(vec_a);
vec += vec_b;
return vec;
}
inline vec3 operator-(const vec3 &vec_a, const vec3 &vec_b) {
vec3 vec(vec_a);
vec -= vec_b;
return vec;
}
inline vec3 operator*(const vec3 &vec_a, const float param) {
vec3 vec(vec_a);
vec *= param;
return vec;
}
inline vec3 operator/(const vec3 &vec_a, const float param) {
vec3 vec(vec_a);
vec /= param;
return vec;
}
inline vec3 operator/(const vec3 &vec_a, const vec3 &vec_b) {
return vec3(vec_a.entries[0] / vec_b.entries[0],
vec_a.entries[1] / vec_b.entries[1],
vec_a.entries[2] / vec_b.entries[2]);
}
inline float length_squared(const vec3 &vec) {
return vec[0] * vec[0] + vec[1] * vec[1] + vec[2] * vec[2];
}
float length(const vec3 &vec);
inline float xz_length_squared(const vec3 &vec) {
return vec[0] * vec[0] + vec[2] * vec[2];
}
float xz_length(const vec3 &vec);
inline float dot(const vec3 &vec_a, const vec3 &vec_b) {
return vec_a[0] * vec_b[0] + vec_a[1] * vec_b[1] + vec_a[2] * vec_b[2];
}
inline float distance(const vec3 &vec_a, const vec3 &vec_b) {
return length(vec_a - vec_b);
}
inline float distance_squared(const vec3 &vec_a, const vec3 &vec_b) {
return length_squared(vec_a - vec_b);
}
inline float xz_distance(const vec3 &vec_a, const vec3 &vec_b) {
return xz_length(vec_a - vec_b);
}
inline float xz_distance_squared(const vec3 &vec_a, const vec3 &vec_b) {
return xz_length_squared(vec_a - vec_b);
}
vec3 normalize(const vec3 &vec);
// TODO: these should be templated
inline vec3 components_min(const vec3 &a, const vec3 &b) {
vec3 result;
result.x() = (a.x() < b.x()) ? a.x() : b.x();
result.y() = (a.y() < b.y()) ? a.y() : b.y();
result.z() = (a.z() < b.z()) ? a.z() : b.z();
return result;
}
inline vec3 components_max(const vec3 &a, const vec3 &b) {
vec3 result;
result.x() = (a.x() > b.x()) ? a.x() : b.x();
result.y() = (a.y() > b.y()) ? a.y() : b.y();
result.z() = (a.z() > b.z()) ? a.z() : b.z();
return result;
}
inline vec3 cross(const vec3 &vec_a, const vec3 &vec_b) {
vec3 result;
result[0] = vec_a[1] * vec_b[2] - vec_a[2] * vec_b[1];
result[1] = vec_a[2] * vec_b[0] - vec_a[0] * vec_b[2];
result[2] = vec_a[0] * vec_b[1] - vec_a[1] * vec_b[0];
return result;
}
inline vec3 operator*(const vec3 &vec_a, const vec3 &vec_b) {
return vec3(vec_a[0] * vec_b[0],
vec_a[1] * vec_b[1],
vec_a[2] * vec_b[2]);
}
inline vec3 reflect(const vec3 &vec, const vec3 &normal) {
return vec - normal * (2.0f * dot(vec, normal));
}
inline vec3 operator-(const vec3 &vec) {
return vec * -1.0f;
}
inline vec3 operator*(float param, const vec3 &vec_b) {
return vec_b * param;
}
inline bool operator==(const vec3 &vec_a, const vec3 &vec_b) {
return (vec_a.entries[0] == vec_b.entries[0] &&
vec_a.entries[1] == vec_b.entries[1] &&
vec_a.entries[2] == vec_b.entries[2]);
}
inline bool operator<(const vec3 &a, const vec3 &b) {
return a.entries[0] < b.entries[0] ||
(a.entries[0] == b.entries[0] &&
(a.entries[1] < b.entries[1] ||
(a.entries[1] == b.entries[1] &&
a.entries[2] < b.entries[2])));
}
inline vec3 lerp(vec3 v0, vec3 v1, float t) {
return (1 - t) * v0 + t * v1;
}
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