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+// 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 bullet collision and provides an example of a gameplay scenario.
+/// This also uses a loop shape.
+class Pinball : public Test
+{
+public:
+ Pinball()
+ {
+ // Ground body
+ b2Body* ground = NULL;
+ {
+ b2BodyDef bd;
+ ground = m_world->CreateBody(&bd);
+
+ b2Vec2 vs[5];
+ vs[0].Set(-8.0f, 6.0f);
+ vs[1].Set(-8.0f, 20.0f);
+ vs[2].Set(8.0f, 20.0f);
+ vs[3].Set(8.0f, 6.0f);
+ vs[4].Set(0.0f, -2.0f);
+
+ b2ChainShape loop;
+ loop.CreateLoop(vs, 5);
+ b2FixtureDef fd;
+ fd.shape = &loop;
+ fd.density = 0.0f;
+ ground->CreateFixture(&fd);
+ }
+
+ // Flippers
+ {
+ b2Vec2 p1(-2.0f, 0.0f), p2(2.0f, 0.0f);
+
+ b2BodyDef bd;
+ bd.type = b2_dynamicBody;
+
+ bd.position = p1;
+ b2Body* leftFlipper = m_world->CreateBody(&bd);
+
+ bd.position = p2;
+ b2Body* rightFlipper = m_world->CreateBody(&bd);
+
+ b2PolygonShape box;
+ box.SetAsBox(1.75f, 0.1f);
+
+ b2FixtureDef fd;
+ fd.shape = &box;
+ fd.density = 1.0f;
+
+ leftFlipper->CreateFixture(&fd);
+ rightFlipper->CreateFixture(&fd);
+
+ b2RevoluteJointDef jd;
+ jd.bodyA = ground;
+ jd.localAnchorB.SetZero();
+ jd.enableMotor = true;
+ jd.maxMotorTorque = 1000.0f;
+ jd.enableLimit = true;
+
+ jd.motorSpeed = 0.0f;
+ jd.localAnchorA = p1;
+ jd.bodyB = leftFlipper;
+ jd.lowerAngle = -30.0f * b2_pi / 180.0f;
+ jd.upperAngle = 5.0f * b2_pi / 180.0f;
+ m_leftJoint = (b2RevoluteJoint*)m_world->CreateJoint(&jd);
+
+ jd.motorSpeed = 0.0f;
+ jd.localAnchorA = p2;
+ jd.bodyB = rightFlipper;
+ jd.lowerAngle = -5.0f * b2_pi / 180.0f;
+ jd.upperAngle = 30.0f * b2_pi / 180.0f;
+ m_rightJoint = (b2RevoluteJoint*)m_world->CreateJoint(&jd);
+ }
+
+ // Circle character
+ {
+ b2BodyDef bd;
+ bd.position.Set(1.0f, 15.0f);
+ bd.type = b2_dynamicBody;
+ bd.bullet = true;
+
+ m_ball = m_world->CreateBody(&bd);
+
+ b2CircleShape shape;
+ shape.m_radius = 0.2f;
+
+ b2FixtureDef fd;
+ fd.shape = &shape;
+ fd.density = 1.0f;
+ m_ball->CreateFixture(&fd);
+ }
+
+ m_button = false;
+ }
+
+ void Step(Settings& settings) override
+ {
+ if (m_button)
+ {
+ m_leftJoint->SetMotorSpeed(20.0f);
+ m_rightJoint->SetMotorSpeed(-20.0f);
+ }
+ else
+ {
+ m_leftJoint->SetMotorSpeed(-10.0f);
+ m_rightJoint->SetMotorSpeed(10.0f);
+ }
+
+ Test::Step(settings);
+
+ g_debugDraw.DrawString(5, m_textLine, "Press 'a' to control the flippers");
+ m_textLine += m_textIncrement;
+
+ }
+
+ void Keyboard(int key) override
+ {
+ switch (key)
+ {
+ case GLFW_KEY_A:
+ m_button = true;
+ break;
+ }
+ }
+
+ void KeyboardUp(int key) override
+ {
+ switch (key)
+ {
+ case GLFW_KEY_A:
+ m_button = false;
+ break;
+ }
+ }
+
+ static Test* Create()
+ {
+ return new Pinball;
+ }
+
+ b2RevoluteJoint* m_leftJoint;
+ b2RevoluteJoint* m_rightJoint;
+ b2Body* m_ball;
+ bool m_button;
+};
+
+static int testIndex = RegisterTest("Examples", "Pinball", Pinball::Create);