https://www.yz-learning.com/ Sat, 04 Apr 2026 04:42:01 +0000 FeedCreator 1.8 https://www.yz-learning.com/lib/exe/fetch.php?media=wiki:dokuwiki.svg https://www.yz-learning.com/ https://www.yz-learning.com/doku.php?id=game-engineer:classes:2023:game-mathematics:first-term:7:07-04-04&rev=1688542719 Vectorを原点中心に回す！ # include <Siv3D.hpp> // OpenSiv3D v0.6.10 # include <cmath> Vec2 sVec = { 0.0, -1.0 }; const double vLength = 100; const double PI = 3.14159265359; /// @brief 角度とラジアンを変換して返します /// @param _angle 角度を入力 /// @return ラジアンに変換された値 double Degree2Radians(double _angle) { return(_angle * (PI / 180.0)); } /// @brief _angle度だけ_vecを原点中心に回転して返す /// @param _vec 回転されるベクトル /// @param _angle 回転角度（度） /// @return 回転後のベクトル Vec2 RotateVec(Vec2 _vec, double _angle) { double theta = Degree2Ra… anonymous@undisclosed.example.com (Anonymous) Wed, 05 Jul 2023 07:38:39 +0000 https://www.yz-learning.com/doku.php?id=game-engineer:classes:2023:game-mathematics:first-term:7:07-06-01&rev=1688605978 # include <Siv3D.hpp> // OpenSiv3D v0.6.10 Vec2 ConvertMath2Screen(Vec2 _point) { Vec2 resultPoint; Vec2 halfScrSize = { Scene::Width() / 2.0, Scene::Height() / 2.0 }; resultPoint.x = _point.x+halfScrSize.x; resultPoint.y = Scene::Height() - (_point.y + halfScrSize.y); return resultPoint; } void DrawAxis() { Vec2 halfScrSize = { Scene::Width() / 2.0, Scene::Height() / 2.0 }; Vec2 xAxisStart = { 0, halfScrSize.y }; Vec2 xAxisEnd = { Scene::Width() , halfScrSize.y }; Vec2 yAxisStart = {… anonymous@undisclosed.example.com (Anonymous) Thu, 06 Jul 2023 01:12:58 +0000