Hi !
Featured games (84)
games approved by the League of Dukes
Games in Showcase (565)
Games in Android Showcase (151)
games submitted by our members
Games in WIP (606)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
   Home   Help   Search   Login   Register   
  Show Posts
Pages: [1]
1  Game Development / Performance Tuning / Creating a spotlight on: 2004-11-07 15:36:40
hello people!

I'm making a game resembling parappa the rapper (for those of you who remember)
so I got a dude rapping on a stage
what I wanna do is create multiple spotlights that light up the stage
the spotlights start from the top, spread their light down (in a triangle) and light up the floor with an oval
what I do is that I draw a triangle polygon that represents the light...this triangle is semi-transparent and has the "lighting the scene up" effect
I also draw a trasparent oval on the floor
code looks like

g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, intensity));
           Polygon p = new Polygon();
     //fromX and fromY are the starting point of the light
           p.addPoint(fromX, fromY);
 //atX and atY the center of the oval of light on the floor...radX and radY the radius
           p.addPoint(atX - radX, atY);
           p.addPoint(atX + radX, atY);
           g2.fillOval(atX - radX, atY - radY, radX * 2, radY * 2);
                 //correction light
           g2.fillArc(atX - radX, atY - radY, radX * 2, radY * 2, 0, -180);
           g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f));

now the problem is that drawing the filled polygon every time is too slow (I'm using bufferStrategy, which is the fastest drawing technique I know so far)
it lowers my FPS by like 20 FPS

anyone has any alternatives to that method ?
Pages: [1]
ags1 (21 views)
2015-03-31 10:55:12

theagentd (13 views)
2015-03-27 23:08:20

wxwsk8er (54 views)
2015-03-20 15:39:46

Fairy Tailz (47 views)
2015-03-15 21:52:20

Olo (29 views)
2015-03-13 17:51:59

Olo (32 views)
2015-03-13 17:50:51

Olo (39 views)
2015-03-13 17:50:16

Olo (44 views)
2015-03-13 17:47:07

ClaasJG (60 views)
2015-03-10 11:36:42

ClaasJG (43 views)
2015-03-10 11:33:01
How to: JGO Wiki
by Mac70
2015-02-17 20:56:16

2D Dynamic Lighting
by ThePixelPony
2015-01-01 20:25:42

How do I start Java Game Development?
by gouessej
2014-12-27 19:41:21

Resources for WIP games
by kpars
2014-12-18 10:26:14

Understanding relations between setOrigin, setScale and setPosition in libGdx
by mbabuskov
2014-10-09 22:35:00

Definite guide to supporting multiple device resolutions on Android (2014)
by mbabuskov
2014-10-02 22:36:02

List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27 is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!