bullet

How to get the Euler rotation of a rigid body between 0 to 360 in Bullet Physics?

本小妞迷上赌 提交于 2019-12-01 21:54:29
I am currently trying to get the rotation of an object. I am using C++ and Bullet Physics. This is my code: btScalar x, y, z; body[0]->getCenterOfMassTransform().getBasis().getEulerZYX(z, y, x); However, as I rotate the object around clockwise the number I get from the y (y is vertical in Bullet) axis goes from 0 to -90 to 0 to 90 and finally back to 0 for every quarter rotation. It is close but what I need is for it to go all the way from 0 to 360. Bullet documentation says: void getEulerZYX (btScalar &yaw, btScalar &pitch, btScalar &roll, unsigned int solution_number=1) const and solution

How to find where to cast a ray to avoid collision in Bullet?

旧巷老猫 提交于 2019-11-27 21:25:09
问题 Say we have an object at point A. It wants to find out if it can move to point B. It has limited velocity so it can only move step by step. It casts a ray at direction it is moving to. Ray collides with an object and we detect it. How to get a way to pass our ray safely (avoiding collision)? btw, is there a way to make such thing work in case of object cast, will it be as/nearly fast as with simple ray cast? Is there a way to find optimal in some vay path? 回答1: What you're asking about is

Format UILabel with bullet points?

删除回忆录丶 提交于 2019-11-27 06:35:13
Is it possible to format the text in a UILabel to show a bullet point ? If so, How can I do it? Chris Doble Perhaps use the Unicode code point for the bullet character in your string? Objective-c myLabel.text = @"\u2022 This is a list item!"; Swift 4 myLabel.text = "\u{2022} This is a list item!" Zac24 just add " • " Even i was looking for something like this for my textView . What i did, just append above string with my string and pass it to my textView , same can be done for labels also. I answered this for future Viewer. Here is nice solution with Swift let label = UILabel() label.frame =

Format UILabel with bullet points?

与世无争的帅哥 提交于 2019-11-26 12:01:02
问题 Is it possible to format the text in a UILabel to show a bullet point ? If so, How can I do it? 回答1: Perhaps use the Unicode code point for the bullet character in your string? Objective-c myLabel.text = @"\u2022 This is a list item!"; Swift 4 myLabel.text = "\u{2022} This is a list item!" 回答2: just add " • " Even i was looking for something like this for my textView . What i did, just append above string with my string and pass it to my textView , same can be done for labels also. I answered