frame-rate

I'm new to Processing and I've been working on simulating electron motion. Everything seems fine until I'm try to add a gradient color to each particle.The frame rate drops considerably. Here is what I've tried so far: float a=0; float s; void setup() { size(500,500); smooth(); frameRate(500); colorMode(HSB,360,100,100); noStroke(); ellipseMode(RADIUS); } void draw() { background(200,0,100); pushMatrix(); translate(width/2, height/2); rotate(radians(-18)); for ( int r = width ; r >= 0; r = r - 1 ) { s = 500*exp(-r); fill(202, s, 100); ellipse(100*cos(a), 50*sin(a), r, r); } a+=0.1; popMatrix()

How to set Camera FPS? May be cvSetCaptureProperty(cameraCapture, CV_CAP_PROP_FPS, 30); ? But it's return HIGHGUI ERROR: V4L2: Unable to get property (5) - Invalid argument Because there is no implementation in highgui/cap_v4l.cpp static int icvSetPropertyCAM_V4L( CvCaptureCAM_V4L* capture, int property_id, double value ){ static int width = 0, height = 0; int retval; /* initialization */ retval = 0; /* two subsequent calls setting WIDTH and HEIGHT will change the video size */ /* the first one will return an error, though. */ switch (property_id) { case CV_CAP_PROP_FRAME_WIDTH: width =

I'm making a " Achtung die kurve "-clone in Sprite Kit. For the constantly moving lines/players I'm using A CGMutablePathRef along with an SKShapeNode. In the update method I'm doing this // _lineNode is an instance of SKShapeNode and path is CGMutablePathRef CGPathAddLineToPoint(path, NULL, _xPos, _yPos); _lineNode.path = path; to add to the line. The update method is also updating the _xPos and _yPos constantly to make it grow. I guess what I'm really asking is is there another, more efficient way of drawing the lines, since the way I'm doing it now drops the frame rate way too much after a

How could I calculate the FPS of a canvas game application? I've seen some examples, but none of them use requestAnimationFrame, and im not sure how to apply their solutions there. This is my code: (function(window, document, undefined){ var canvas = document.getElementById("mycanvas"), context = canvas.getContext("2d"), width = canvas.width, height = canvas.height, fps = 0, game_running = true, show_fps = true; function showFPS(){ context.fillStyle = "Black"; context.font = "normal 16pt Arial"; context.fillText(fps + " fps", 10, 26); } function gameLoop(){ //Clear screen context.clearRect(0,