box2d javascript

Cocos2dx box2d details how to set the response force of an object Dionysoslai ([email protected]) 2014/7/29 In box2d, objects have three attributes: 1.DensityThe mass (that is, the density) of a unit volume means that an object with a higher density has more quality and is more difficult to move. 2.Friction, Friction, range: 0-1.0. 0 indicates that there is no friction. 1 indicates the maximum friction and

Create a project box2dtest and remove the background and genie objects. First, define a screen pixel and physical world length conversion macro in the helloworldscene. h header file, and introduce the box2d header file. #define PIXEL_TO_METER 30 #include "Box2D/Box2D.h" Then declare several functions and variables. Void createworld (); // create the physical world void createwall (); // create the

The joint is in the object organizational structure of box2d, and is parallel with b2body (rigid body. Therefore, both objects are created and managed directly by b2world. However, joint depends on b2body, that is, its destruction: When the rigid body involved in the joint is destroyed, the joint is also destroyed. Access the joint pointer again to get an error. Therefore, when destroying the body, you should traverse the involved joint and destroy it

box2d Dynamic treedynamic tree is a full binary trees, that is, a non-leaf node must have two sub-nodes (note: Full binary trees and college teachers talk about two fork trees, completely binary tree different) so what if the tree is built? First look at the source while (M_nodes[index]. IsLeaf () = = False) {Int32 child1 = M_nodes[index].child1; Int32 child2 = M_nodes[index].child2; float32 area = M_nodes[index].aabb. Getperimeter (); Area cost B

When using box2d in libgdx, pay attention to the following coordinate system problems: 1. the coordinates in the physical world are located at the center of the screen, while those in libgdx are located at the lower left corner. 2. The setviewport method is used to scale the stage, so that the drawing coordinates and the physical simulation coordinates are unified in form. 3. In actor that has been encapsulated by the body in

Many excerpted contentTranslated by Aman JiangBox2d v2.0.1 User Manual Chapter 4 debug drawing) The implementation of b2debugdraw allows you to get a detailed picture of the physical world. Here is the available entity: • Shape Contour • Joint connectivity • Core shape (for continuous collision) • Broad-phase AABB, including the world's AABB • Polygon Oriented Bounding Boxes (obbs) • Broad-phase pairs (potential contacts) • Centroid This is the first way to draw these physical entities, which i

我们通过一个实例介绍一下，在Cocos2d-x 3.x中使用Box2D物理引擎的开发过程，熟悉这些API的使用。这个实例运行后的场景，当场景启动后，玩家可以触摸点击屏幕，每次触摸时候，就会在触摸点生成一个新的精灵，精灵的运行自由落体运动。 HelloBox2D实例使用Box2D引擎进行开发过程，12-15所示。下面我们就按照这个步骤介绍一下代码部分。首先看一下看HelloWorldScene.h文件，它的代码如下： #ifndef __HELLOWORLD_SCENE_H__#define __HELLOWORLD_SCENE_H__#include "cocos2d.h"#include "Box2D/Box2D.h"①#define PTM_RATIO 32②class HelloWorld : publi

Recently I have studied box2d, and I have learned about it in general. However, when running the demo of the ball's whereabouts, I found that the moving speed is different from the physical condition, after studying it carefully, I found that there were so many details that I should pay attention. This must be recorded. It will certainly be helpful to those who have the same problems in the future. Physical Model: A square box with a side length of 1

Let's simulate the bomb effect today. So the question comes: "Why imitate such a violent effect?" Is it not for a few days, yorhom character change? ”In fact, the students who have played Angry birds should be familiar with this effect, because according to unofficial reports, the second most powerful bird-black bird stunt is self-destruct. The second question arises: "What kind of bird is the first?" "According to Yorhom I personally test, the red bird should be the most powerful, but seemingly

Box2d tutorial 1-create a collision world Box2d tutorial 2-mouse Interaction Box2d tutorial 3-Rigid Body binding Box2d tutorial 4-complex appearance of complex rigid bodies Box2d tutorial 5-Collision Detection The mouse interaction of

connected to two static or kinematic objects, but this does not have any practical purpose, it will only waste time on the processor. You can specify user data for any joint type. You can also provide a tag to prevent collision of objects connected with joints. In fact, this is the default action. You can also set the collideconnected Boolean value to allow collision of connected objects. Many joint definitions require you to provide some geometric data. An anchor point is often needed for a jo

Link: http://blog.csdn.net/zhangxaochen/article/details/8009302 When I was a beginner at box2d, I thought it was a strange way to drag the body. We need to construct a b2mousejointdef struct in cctouchesbegan (if we have determined that the mouse has been clicked on the body) and set the associations between two bodya and bodyb, then, set target to the coordinates of the mouse in the box2d physical world, i

When you use Cocos2d-android to develop Android games, when you call the New World (Vector2,boolean) in box2d, the following error occurs:"Java.lang.UnsatisfiedLinkError:Native Method not Found:com.badlogic.gdx.physics.box2d.World.newWorld: (FFZ) J"Workaround:To add code to the current class:static { system.loadlibrary ("GDx");}This article is from the "What's Program" blog, please be sure to keep this source http://283859701.blog.51cto.com/1943436

Link: http://blog.csdn.net/zhangxaochen/article/details/8009457 I was reading this tutorial: Http://www.raywenderlich.com/475/how-to-create-a-simple-breakout-game-with-box2d-and-cocos2d-tutorial-part-12 Http://www.cnblogs.com/andyque/archive/2011/05/27/2059460.html It says: After you create a mouse joint, you assign two bodies to it. The first is not used. It is usually set to the ground body. The second one is the body you want to move. In this examp

The normal selection won't be mentioned here. As provided in box2d, a quick selection class with relatively high efficiency is b2QueryCallback. #ifndef QueryCallback_H#define QueryCallback_H#include class QueryCallback :public b2QueryCallback{public:QueryCallback(void);QueryCallback(const b2Vec2 point);~QueryCallback(void);bool ReportFixture(b2Fixture* fixture);b2Vec2 m_point;b2Fixture* m_fixture;std::vector m_vectFixture;};#endif #

1, the right mouse button can drag the movement of the scene, the mouse wheel can zoom in and zoom out view2, click the Red Right button (Ctrl+r) to run the program from the player's perspective.3, in the player's view state to run the program, click the space can be simulated run, and then click the space to end the simulation.4, in the simulated running state, you can drag the object with the mouse to move, right-click to drag the scene to move5, in the editor bodies click the left mouse butto

Cocos2d-x is currently the most popular mobile game engine, in domestic and foreign mobile game development and use of their share is 70% and 25%, in the top 10 app store, seven of them are developed with it. This course is nine of the Cocos2d-x series, learning box2d physics engine! Learning path: The course is suitable for learning the little white system. It takes only 6 lessons and can be easily mastered in the humorous course of the Principal

To use box2d, you must first create a world. Only when you have a world can you simulate everything in box2d. Create world: B2vec2 gravity (0.0f,-10.0f ); World= New b2world (gravity ); Bool dosleep = true; World-> Setallowsleeping (dosleep ); World-> Setcontinuousphysics (true ); Second, there must be a boundary for simulating the physical world. box2d