Created
June 11, 2022 08:03
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角度を指定するUI
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#include <Siv3D.hpp> // OpenSiv3D v0.6.4 | |
void DrawAngleText(const Font& font, const Circle& circle, double angle, ColorF color) | |
{ | |
const auto degText = font(U"{:.1f}"_fmt(ToDegrees(angle))); | |
degText.region(Arg::topCenter = circle.center + Vec2{ 0, circle.r + 2 }).draw(ColorF(Scene::GetBackground(), 0.8)); | |
degText.draw(Arg::topCenter = circle.center + Vec2{ 0, circle.r + 2 }, color); | |
} | |
void Main() | |
{ | |
Scene::SetBackground(ColorF(0.9)); | |
double angleA = 0; | |
double angleB = 0; | |
int dragState = 0; | |
Font regular(20, Typeface::Regular); | |
Font bold(20, Typeface::Bold); | |
while (System::Update()) | |
{ | |
if (not MouseL.pressed()) | |
{ | |
dragState = 0; | |
} | |
if (dragState) | |
{ | |
Vec2 diff = Cursor::PosF() - Scene::CenterF(); | |
if (diff.length() > 8) | |
{ | |
double angle = std::atan2(-diff.y, diff.x); | |
switch (dragState) | |
{ | |
case 1: | |
angleA = angle; | |
break; | |
case 2: | |
angleB = angle; | |
break; | |
} | |
} | |
} | |
{ | |
Transformer2D t(Mat3x2::Translate(Scene::CenterF()), TransformCursor::Yes); | |
Vec2 posA = Vec2{ std::cos(angleA), -std::sin(angleA) } * 200; | |
Vec2 posB = Vec2{ std::cos(angleB), -std::sin(angleB) } * 300; | |
const Circle circleA(posA, 20); | |
const Circle circleB(posB, 20); | |
Line(-340, 0, 340, 0).draw(2, Palette::Lightgray); | |
bold(U"+").draw(Arg::bottomCenter = Vec2{ 330, 1 }, Palette::Gray); | |
bold(U"-").draw(Arg::topCenter = Vec2{ 330, -1 }, Palette::Gray); | |
Line(0, 0, posB).draw(4, Palette::Darkred); | |
circleB | |
.draw(Palette::White) | |
.drawFrame(dragState == 2 ? 4 : 2, Palette::Darkred); | |
bold(U"B").drawAt(posB, Palette::Darkred); | |
DrawAngleText(regular, circleB, angleB, Palette::Darkred); | |
Line(0, 0, posA).draw(4, Palette::Darkblue); | |
circleA | |
.draw(Palette::White) | |
.drawFrame(dragState == 1 ? 4 : 2, Palette::Darkblue); | |
bold(U"A").drawAt(posA, Palette::Darkblue); | |
DrawAngleText(regular, circleA, angleA, Palette::Darkblue); | |
Circle(0, 0, 8).draw(Scene::GetBackground()); | |
if (MouseL.down()) | |
{ | |
if (circleA.mouseOver()) | |
{ | |
dragState = 1; | |
} | |
if (circleB.mouseOver()) | |
{ | |
dragState = 2; | |
} | |
} | |
} | |
ClearPrint(); | |
Print << U"A → B: " << ToDegrees(angleB - angleA); | |
Print << U"A → B + 2π: " << ToDegrees(angleB + Math::TwoPi - angleA); | |
Print << U"A → B - 2π: " << ToDegrees(angleB - Math::TwoPi - angleA); | |
} | |
} |
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