April 2018
Beginner
714 pages
18h 21m
English
book
Game Programming using Qt 5 Beginner's Guide - Second Edition
by Pavel Strakhov, Witold Wysota, Lorenz Haas
Content preview from Game Programming using Qt 5 Beginner's Guide - Second Edition
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Tuning the emitter
You can control the amount of particles being emitted by setting the emitRate property of the emitter. Another property, called the lifeSpan, determines how many milliseconds it takes before a particle dies. To introduce some random behavior, you can use the lifeSpanVariation property to set a maximum amount of time (in milliseconds) the life span can be altered by the system (in both directions):
Emitter { anchors.fill: parent emitRate: 350 lifeSpan: 1500 lifeSpanVariation: 400 // effective: 1100-1900 ms}
A possible result of this change is shown in the following picture:
Increasing the emission rate and life span of particles ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.