box2d javascript

The physical world of box2d has a world to maintain. You can create simple objects, circles, rectangles, triangles, and polygon. Polygon supports only Convex Polygon and a maximum of 8 vertices. There are three types of box2d objects: dynamic, static, and kinematic ). Dynamic objects can be forced, collided, and moved. Static objects cannot be moved, they cannot be moved, and they can be involved in a coll

I. Concepts of box2d 1.1Rigid Body, particle, only the position has no size Static rigid body: the static rigid body has no quality and no speed. You can manually change its position. Motion rigid body: the motion rigid body has no quality, but can have a speed. You can update the position on your own. Dynamic rigid body: the dynamic rigid body has both quality and speed. Create a Rigid Body B2bodydef bodydef; // defines a rigid bodydef. type = b

Today, let's take a look at how to create an irregular shape. In box2d, you can set multiple vertex for a shape, so that you may generate a custom shape, such In this way, a custom shape is created. Note the following when creating a custom shape: 1. the vertex position is relative to the center of the body 2. the vertex needs to be defined clockwise. 3. the maximum number of vertices cannot exceed 8. The larger the number, the more expensive t

Previous review This famous saying goes:Never measure the height of a mountain-Unless you have reached the peak, you will know how low the mountains are.[Hamadho] In the previous article, we learned the common module of one of the three main modules of the box2d physical engine. This module mainly includes settings, memory management, and vector mathematics. This time, I learned about the collison module. Introduction This collision module includ

an inclined object, there is only one contact point between it and the inclined surface, so there is no friction, which will cause distortion of the player's motion state. If the player's fixedRotation is set to false, it can be rotated. In this case, the friction is normal, but the player's sprite image also rotates, but sometimes it is expected that the sprite remains upright. Solution: 1. Always fixedRotation = true, When the player is on the slope, the player body is constructed into a

;createfixture (FIXTUREDEF);Config Cocos shapeAuto S=sprite::create ();S->settexturerect (Rect (0,0,0.5*2*ratio,0.5*2*ratio));AddChild (s);S->setposition (Point (Def.position.x*ratio,def.position.y*ratio));Groundbody->setuserdata (s);}void Helloworld::addground () {B2bodydef def;DEF.POSITION=B2VEC2 (400/ratio,0);Def.type=b2_staticbody;B2body *body=world->createbody (DEF);B2polygonshape Groundshape;Groundshape.setasbox (400/ratio,0.5);B2fixturedef Fixuredef;Fixuredef.density=1;fixuredef.friction=

Find the Solution Testcpp project. Open its properties = "C + + =" preprocessor = = = "Processor definition. Join "Cc_enable_box2d_integration=1", Change "cc_enable_chipmunk_integration=0", open Libextensions project same find preprocessor definition, add "cc_ Enable_box2d_integration=1 ", delete" Cc_enable_chipmunk_integration=1 "watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvb3lhbmd5dwz1/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/southeast "width=" 650 "height=" 501 "style

Chapter 2 dynamics module 05th Overview The dynamic module is the most complex part of box2d, and you have the most interaction with this module. The dynamic module is built on the basis of the general and collision modules. Now you should understand these two modules. The dynamic module includes the following classes: • Shape and fixture) • Rigid Body • Contact • Joint • World • Listener (listener) These classes are mutually dependent and it

MyContactFilter;_ World-> SetContactFilter (cf ); In this way, no matter how you set the fixture groupIndex, maskBits, and categoryBits, all the bodies will collide.[Note] In box2d, b2World, b2ContactFilter, and b2ContactListener are a few classes that are not managed by the engine and need to be new by themselves. Remember to delete them in the destructor. If the custom contactFilter is not a member variable, you can release it in the Destructor as

Original article: These two days to play cocos2d-x and box2d, found that cocos2d-x version 2.0 to use the old method debug rendering will be wrong, so found a new method to debug draw: First, add the following in your header file: Public: //..... Virtual void draw (); //..... Then implement it in your cpp: Void HelloWorld: draw () {CCLayerColor: draw (); ccglablevertexattribs (attri); kmGLPushMatrix (); glScalef (CC_CONTENT_SCALE_FACTOR

RUBE box2d editor, rubebox2d 1. Right-click and hold the mouse to move the scene. The scroll wheel of the mouse can zoom in or out the view. 2. Click the red right button (ctrl + R) to run the program from the player's perspective. 3. When running a program in the player's perspective, click a space to simulate the running, and then click a space to end the simulation. 4. In the simulated running state, you can move the object with the mouse, righ