Hi guys, I'm getting closer to wrapping up my game project but facing an interesting "issue" now with the game so looking for help on how to do this.
I need to draw lines (lasers) in orthogonal 2D coordinate space using OpenGL but I cannot nail down a quick way to do so. Usually I draw everything using gl.glDrawArrays(); and it's proven to be fairly good way of rendering everything in my tile based world. But the lasers are giving me a headache. I need to be able to draw line between two points and the two points can be anywhere on the screen. This makes it next to impossible to predefine the lines. If I only had to do horizontal / vertical lines I could easily solve this but since the two points can be anywhere on the screen and I need to be able to draw a line between them no matter the angle / direction. My current implementation is a really lousy one and definitely hits the FPS a bit too heavily. When ever I need to draw a line between two points (which is quite often) I call a "shoot" method that takes in two positions (start and end of the line) and draws a line between them. It defines the vertices everytime I call shoot. I define them by doing the whole thing: ////////////////////////// CODE START //////////////////////////////////////// // PASTEBIN LINK FOR THE SAME CODE : http://pastebin.com/m4faa750b float lineVertices[] = { pos1.x, pos1.y, pos2.x, pos.y }; ByteBuffer bb = ByteBuffer.allocateDirect(lineVertices.length * 4); bb.order(ByteOrder.nativeOrder()); line = bb.asFloatBuffer(); line.put(lineVertices); line.position(0); ////////////////////////// CODE END //////////////////////////////////////// And after that I can render it using the gl.glDrawArrays(); easily. Anyone got any better solution? Any way of predefining all the possible lines or other fancy stuff to optimize it a bit. It's obvious that this current implementation is horrible. Causes excessive GC and just slows things down. So looking ways of drawing simple lines between two arbitary points on screen as fast as possible because it happens often. -- You received this message because you are subscribed to the Google Groups "Android Beginners" group. NEW! Try asking and tagging your question on Stack Overflow at http://stackoverflow.com/questions/tagged/android To unsubscribe from this group, send email to android-beginners+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en
