mirror of
https://github.com/godotengine/godot
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212 lines
6.7 KiB
C++
212 lines
6.7 KiB
C++
/**************************************************************************/
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/* vector2.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "vector2.h"
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#include "core/math/vector2i.h"
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#include "core/string/ustring.h"
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real_t Vector2::angle() const {
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return Math::atan2(y, x);
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}
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Vector2 Vector2::from_angle(real_t p_angle) {
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return Vector2(Math::cos(p_angle), Math::sin(p_angle));
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}
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real_t Vector2::length() const {
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return Math::sqrt(x * x + y * y);
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}
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real_t Vector2::length_squared() const {
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return x * x + y * y;
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}
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void Vector2::normalize() {
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real_t l = x * x + y * y;
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if (l != 0) {
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l = Math::sqrt(l);
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x /= l;
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y /= l;
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}
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}
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Vector2 Vector2::normalized() const {
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Vector2 v = *this;
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v.normalize();
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return v;
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}
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bool Vector2::is_normalized() const {
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// use length_squared() instead of length() to avoid sqrt(), makes it more stringent.
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return Math::is_equal_approx(length_squared(), 1, (real_t)UNIT_EPSILON);
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}
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real_t Vector2::distance_to(const Vector2 &p_vector2) const {
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return Math::sqrt((x - p_vector2.x) * (x - p_vector2.x) + (y - p_vector2.y) * (y - p_vector2.y));
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}
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real_t Vector2::distance_squared_to(const Vector2 &p_vector2) const {
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return (x - p_vector2.x) * (x - p_vector2.x) + (y - p_vector2.y) * (y - p_vector2.y);
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}
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real_t Vector2::angle_to(const Vector2 &p_vector2) const {
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return Math::atan2(cross(p_vector2), dot(p_vector2));
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}
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real_t Vector2::angle_to_point(const Vector2 &p_vector2) const {
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return (p_vector2 - *this).angle();
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}
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real_t Vector2::dot(const Vector2 &p_other) const {
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return x * p_other.x + y * p_other.y;
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}
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real_t Vector2::cross(const Vector2 &p_other) const {
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return x * p_other.y - y * p_other.x;
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}
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Vector2 Vector2::sign() const {
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return Vector2(SIGN(x), SIGN(y));
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}
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Vector2 Vector2::floor() const {
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return Vector2(Math::floor(x), Math::floor(y));
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}
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Vector2 Vector2::ceil() const {
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return Vector2(Math::ceil(x), Math::ceil(y));
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}
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Vector2 Vector2::round() const {
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return Vector2(Math::round(x), Math::round(y));
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}
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Vector2 Vector2::rotated(real_t p_by) const {
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real_t sine = Math::sin(p_by);
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real_t cosi = Math::cos(p_by);
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return Vector2(
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x * cosi - y * sine,
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x * sine + y * cosi);
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}
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Vector2 Vector2::posmod(real_t p_mod) const {
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return Vector2(Math::fposmod(x, p_mod), Math::fposmod(y, p_mod));
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}
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Vector2 Vector2::posmodv(const Vector2 &p_modv) const {
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return Vector2(Math::fposmod(x, p_modv.x), Math::fposmod(y, p_modv.y));
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}
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Vector2 Vector2::project(const Vector2 &p_to) const {
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return p_to * (dot(p_to) / p_to.length_squared());
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}
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Vector2 Vector2::clamp(const Vector2 &p_min, const Vector2 &p_max) const {
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return Vector2(
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CLAMP(x, p_min.x, p_max.x),
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CLAMP(y, p_min.y, p_max.y));
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}
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Vector2 Vector2::clampf(real_t p_min, real_t p_max) const {
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return Vector2(
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CLAMP(x, p_min, p_max),
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CLAMP(y, p_min, p_max));
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}
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Vector2 Vector2::snapped(const Vector2 &p_step) const {
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return Vector2(
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Math::snapped(x, p_step.x),
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Math::snapped(y, p_step.y));
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}
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Vector2 Vector2::snappedf(real_t p_step) const {
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return Vector2(
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Math::snapped(x, p_step),
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Math::snapped(y, p_step));
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}
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Vector2 Vector2::limit_length(real_t p_len) const {
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const real_t l = length();
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Vector2 v = *this;
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if (l > 0 && p_len < l) {
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v /= l;
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v *= p_len;
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}
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return v;
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}
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Vector2 Vector2::move_toward(const Vector2 &p_to, real_t p_delta) const {
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Vector2 v = *this;
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Vector2 vd = p_to - v;
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real_t len = vd.length();
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return len <= p_delta || len < (real_t)CMP_EPSILON ? p_to : v + vd / len * p_delta;
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}
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// slide returns the component of the vector along the given plane, specified by its normal vector.
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Vector2 Vector2::slide(const Vector2 &p_normal) const {
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#ifdef MATH_CHECKS
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ERR_FAIL_COND_V_MSG(!p_normal.is_normalized(), Vector2(), "The normal Vector2 " + p_normal.operator String() + "must be normalized.");
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#endif
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return *this - p_normal * dot(p_normal);
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}
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Vector2 Vector2::bounce(const Vector2 &p_normal) const {
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return -reflect(p_normal);
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}
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Vector2 Vector2::reflect(const Vector2 &p_normal) const {
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#ifdef MATH_CHECKS
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ERR_FAIL_COND_V_MSG(!p_normal.is_normalized(), Vector2(), "The normal Vector2 " + p_normal.operator String() + "must be normalized.");
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#endif
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return 2.0f * p_normal * dot(p_normal) - *this;
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}
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bool Vector2::is_equal_approx(const Vector2 &p_v) const {
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return Math::is_equal_approx(x, p_v.x) && Math::is_equal_approx(y, p_v.y);
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}
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bool Vector2::is_zero_approx() const {
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return Math::is_zero_approx(x) && Math::is_zero_approx(y);
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}
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bool Vector2::is_finite() const {
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return Math::is_finite(x) && Math::is_finite(y);
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}
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Vector2::operator String() const {
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return "(" + String::num_real(x, false) + ", " + String::num_real(y, false) + ")";
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}
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Vector2::operator Vector2i() const {
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return Vector2i(x, y);
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}
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