From 60cbbdec07ab7a5636eac5b3c024ae44e937f4d4 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Mon, 13 Dec 2021 00:07:19 +0800
Subject: +init
---
.../Box2D/testbed/tests/polygon_shapes.cpp | 265 +++++++++++++++++++++
1 file changed, 265 insertions(+)
create mode 100644 Client/ThirdParty/Box2D/testbed/tests/polygon_shapes.cpp
(limited to 'Client/ThirdParty/Box2D/testbed/tests/polygon_shapes.cpp')
diff --git a/Client/ThirdParty/Box2D/testbed/tests/polygon_shapes.cpp b/Client/ThirdParty/Box2D/testbed/tests/polygon_shapes.cpp
new file mode 100644
index 0000000..e12875b
--- /dev/null
+++ b/Client/ThirdParty/Box2D/testbed/tests/polygon_shapes.cpp
@@ -0,0 +1,265 @@
+// MIT License
+
+// Copyright (c) 2019 Erin Catto
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#include "test.h"
+
+/// This tests stacking. It also shows how to use b2World::Query
+/// and b2TestOverlap.
+
+/// This callback is called by b2World::QueryAABB. We find all the fixtures
+/// that overlap an AABB. Of those, we use b2TestOverlap to determine which fixtures
+/// overlap a circle. Up to 4 overlapped fixtures will be highlighted with a yellow border.
+class PolygonShapesCallback : public b2QueryCallback
+{
+public:
+
+ enum
+ {
+ e_maxCount = 4
+ };
+
+ PolygonShapesCallback()
+ {
+ m_count = 0;
+ }
+
+ /// Called for each fixture found in the query AABB.
+ /// @return false to terminate the query.
+ bool ReportFixture(b2Fixture* fixture) override
+ {
+ if (m_count == e_maxCount)
+ {
+ return false;
+ }
+
+ b2Body* body = fixture->GetBody();
+ b2Shape* shape = fixture->GetShape();
+
+ bool overlap = b2TestOverlap(shape, 0, &m_circle, 0, body->GetTransform(), m_transform);
+
+ if (overlap)
+ {
+ b2Color color(0.95f, 0.95f, 0.6f);
+ b2Vec2 center = body->GetWorldCenter();
+ g_debugDraw->DrawPoint(center, 5.0f, color);
+ ++m_count;
+ }
+
+ return true;
+ }
+
+ b2CircleShape m_circle;
+ b2Transform m_transform;
+ b2Draw* g_debugDraw;
+ int32 m_count;
+};
+
+class PolygonShapes : public Test
+{
+public:
+
+ enum
+ {
+ e_maxBodies = 256
+ };
+
+ PolygonShapes()
+ {
+ // Ground body
+ {
+ b2BodyDef bd;
+ b2Body* ground = m_world->CreateBody(&bd);
+
+ b2EdgeShape shape;
+ shape.SetTwoSided(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f));
+ ground->CreateFixture(&shape, 0.0f);
+ }
+
+ {
+ b2Vec2 vertices[3];
+ vertices[0].Set(-0.5f, 0.0f);
+ vertices[1].Set(0.5f, 0.0f);
+ vertices[2].Set(0.0f, 1.5f);
+ m_polygons[0].Set(vertices, 3);
+ }
+
+ {
+ b2Vec2 vertices[3];
+ vertices[0].Set(-0.1f, 0.0f);
+ vertices[1].Set(0.1f, 0.0f);
+ vertices[2].Set(0.0f, 1.5f);
+ m_polygons[1].Set(vertices, 3);
+ }
+
+ {
+ float w = 1.0f;
+ float b = w / (2.0f + b2Sqrt(2.0f));
+ float s = b2Sqrt(2.0f) * b;
+
+ b2Vec2 vertices[8];
+ vertices[0].Set(0.5f * s, 0.0f);
+ vertices[1].Set(0.5f * w, b);
+ vertices[2].Set(0.5f * w, b + s);
+ vertices[3].Set(0.5f * s, w);
+ vertices[4].Set(-0.5f * s, w);
+ vertices[5].Set(-0.5f * w, b + s);
+ vertices[6].Set(-0.5f * w, b);
+ vertices[7].Set(-0.5f * s, 0.0f);
+
+ m_polygons[2].Set(vertices, 8);
+ }
+
+ {
+ m_polygons[3].SetAsBox(0.5f, 0.5f);
+ }
+
+ {
+ m_circle.m_radius = 0.5f;
+ }
+
+ m_bodyIndex = 0;
+ memset(m_bodies, 0, sizeof(m_bodies));
+ }
+
+ void Create(int32 index)
+ {
+ if (m_bodies[m_bodyIndex] != NULL)
+ {
+ m_world->DestroyBody(m_bodies[m_bodyIndex]);
+ m_bodies[m_bodyIndex] = NULL;
+ }
+
+ b2BodyDef bd;
+ bd.type = b2_dynamicBody;
+
+ float x = RandomFloat(-2.0f, 2.0f);
+ bd.position.Set(x, 10.0f);
+ bd.angle = RandomFloat(-b2_pi, b2_pi);
+
+ if (index == 4)
+ {
+ bd.angularDamping = 0.02f;
+ }
+
+ m_bodies[m_bodyIndex] = m_world->CreateBody(&bd);
+
+ if (index < 4)
+ {
+ b2FixtureDef fd;
+ fd.shape = m_polygons + index;
+ fd.density = 1.0f;
+ fd.friction = 0.3f;
+ m_bodies[m_bodyIndex]->CreateFixture(&fd);
+ }
+ else
+ {
+ b2FixtureDef fd;
+ fd.shape = &m_circle;
+ fd.density = 1.0f;
+ fd.friction = 0.3f;
+
+ m_bodies[m_bodyIndex]->CreateFixture(&fd);
+ }
+
+ m_bodyIndex = (m_bodyIndex + 1) % e_maxBodies;
+ }
+
+ void DestroyBody()
+ {
+ for (int32 i = 0; i < e_maxBodies; ++i)
+ {
+ if (m_bodies[i] != NULL)
+ {
+ m_world->DestroyBody(m_bodies[i]);
+ m_bodies[i] = NULL;
+ return;
+ }
+ }
+ }
+
+ void Keyboard(int key) override
+ {
+ switch (key)
+ {
+ case GLFW_KEY_1:
+ case GLFW_KEY_2:
+ case GLFW_KEY_3:
+ case GLFW_KEY_4:
+ case GLFW_KEY_5:
+ Create(key - GLFW_KEY_1);
+ break;
+
+ case GLFW_KEY_A:
+ for (int32 i = 0; i < e_maxBodies; i += 2)
+ {
+ if (m_bodies[i])
+ {
+ bool enabled = m_bodies[i]->IsEnabled();
+ m_bodies[i]->SetEnabled(!enabled);
+ }
+ }
+ break;
+
+ case GLFW_KEY_D:
+ DestroyBody();
+ break;
+ }
+ }
+
+ void Step(Settings& settings) override
+ {
+ Test::Step(settings);
+
+ PolygonShapesCallback callback;
+ callback.m_circle.m_radius = 2.0f;
+ callback.m_circle.m_p.Set(0.0f, 1.1f);
+ callback.m_transform.SetIdentity();
+ callback.g_debugDraw = &g_debugDraw;
+
+ b2AABB aabb;
+ callback.m_circle.ComputeAABB(&aabb, callback.m_transform, 0);
+
+ m_world->QueryAABB(&callback, aabb);
+
+ b2Color color(0.4f, 0.7f, 0.8f);
+ g_debugDraw.DrawCircle(callback.m_circle.m_p, callback.m_circle.m_radius, color);
+
+ g_debugDraw.DrawString(5, m_textLine, "Press 1-5 to drop stuff, maximum of %d overlaps detected", PolygonShapesCallback::e_maxCount);
+ m_textLine += m_textIncrement;
+ g_debugDraw.DrawString(5, m_textLine, "Press 'a' to enable/disable some bodies");
+ m_textLine += m_textIncrement;
+ g_debugDraw.DrawString(5, m_textLine, "Press 'd' to destroy a body");
+ m_textLine += m_textIncrement;
+ }
+
+ static Test* Create()
+ {
+ return new PolygonShapes;
+ }
+
+ int32 m_bodyIndex;
+ b2Body* m_bodies[e_maxBodies];
+ b2PolygonShape m_polygons[4];
+ b2CircleShape m_circle;
+};
+
+static int testIndex = RegisterTest("Geometry", "Polygon Shapes", PolygonShapes::Create);
--
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