Hi !
Featured games (91)
games approved by the League of Dukes
Games in Showcase (757)
Games in Android Showcase (229)
games submitted by our members
Games in WIP (844)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Creating a spotlight  (Read 1722 times)
0 Members and 1 Guest are viewing this topic.
Offline SlashOwnsU

Innocent Bystander

Java games rock!

« Posted 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]
  ignore  |  Print  

EgonOlsen (79 views)
2018-06-10 19:43:48

EgonOlsen (59 views)
2018-06-10 19:43:44

EgonOlsen (78 views)
2018-06-10 19:43:20

DesertCoockie (261 views)
2018-05-13 18:23:11

nelsongames (160 views)
2018-04-24 18:15:36

nelsongames (158 views)
2018-04-24 18:14:32

ivj94 (902 views)
2018-03-24 14:47:39

ivj94 (162 views)
2018-03-24 14:46:31

ivj94 (813 views)
2018-03-24 14:43:53

Solater (177 views)
2018-03-17 05:04:08
Java Gaming Resources
by philfrei
2017-12-05 19:38:37

Java Gaming Resources
by philfrei
2017-12-05 19:37:39

Java Gaming Resources
by philfrei
2017-12-05 19:36:10

Java Gaming Resources
by philfrei
2017-12-05 19:33:10

List of Learning Resources
by elect
2017-03-13 14:05:44

List of Learning Resources
by elect
2017-03-13 14:04:45

SF/X Libraries
by philfrei
2017-03-02 08:45:19

SF/X Libraries
by philfrei
2017-03-02 08:44:05 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!