2d

How do I allocate and transfer(to and from Host) 2D arrays in device memory in Cuda? Gitmo I found a solution to this problem. I didn't have to flatten the array. The inbuilt cudaMallocPitch() function did the job. And I could transfer the array to and from device using cudaMemcpy2D() function. For example cudaMallocPitch((void**) &array, &pitch, a*sizeof(float), b); This creates a 2D array of size a*b with the pitch as passed in as parameter. The following code creates a 2D array and loops over the elements. It compiles readily, you may use it. #include<stdio.h> #include<cuda.h> #define

I am trying to create an arc (variable number of degrees) that gradually goes from one color to another. From example from blue to red: This is my code: SweepGradient shader = new SweepGradient(center.x, center.y, resources.getColor(R.color.startColor),resources.getColor(R.color.endColor)); Paint paint = new Paint() paint.setStrokeWidth(1); paint.setStrokeCap(Paint.Cap.FILL); paint.setStyle(Paint.Style.FILL); paint.setShader(shader); canvas.drawArc(rectF, startAngle, sweepAngle, true, paint); But the result is the entire arc is painted with the same color. Edit: After more experimenting, I

I want to create a two dimensional array in Javascript where I'm going to store coordinates (x,y). I don't know yet how many pairs of coordinates I will have because they will be dynamically generated by user input. Example of pre-defined 2d array: var Arr=[[1,2],[3,4],[5,6]]; I guess I can use the PUSH method to add a new record at the end of the array. How do I declare an empty two dimensional array so that when I use my first Arr.push() it will be added to the index 0, and every next record written by push will take the next index? This is probably very easy to do, I'm just a newbie with JS

Consider that I have a txt file containing data of the following format: "Home" "A1" "Car" "A2" "Home" "B1" "Home" "A1" "Car" "A2" "Man" "B1" How I can store this kind of data and also in sorted format, without duplicate data? But The first and third element must not be deleted as they are different with 2nd parameter (repetition of second parameter is allowed but not both 1st and 2nd). Please suggest any better collection from Java suitable. Also please give an example as I am new to Java. Best option in Java is a Map<String, String> . As is so urgent, take a look by yourself in the MAP API

I got my openGL view at a size of (lets say..) 800(width)x600(height). Then i got a 2D object of coords: 0.0 , 0.0 0.1 , 0.0 0.1 , 0.1 0.0 , 0.1 this, as you understand is supposed to be a square (based on analogy). But on my openGL view prints this stretched. Now, i understand why this is happening. Its basically because im working on the default matrix of -1,1. And since my resolution of 800x600 doesnt have an aspect ratio of 1, my shape is getting stretched. Now im more interested on how to fix this. Ive read about functions like glFrustum, glOrtho, glViewPort which are happening on the

My question is, what is the best way to tint an image that is drawn using the drawImage method. The target useage for this is advanced 2d particle-effects (game development) where particles change colors over time etc. I am not asking how to tint the whole canvas, only the current image i am about to draw. I have concluded that the globalAlpha parameter affects the current image that is drawn. //works with drawImage() canvas2d.globalAlpha = 0.5; But how do i tint each image with an arbitrary color value ? It would be awesome if there was some kind of globalFillStyle or globalColor or that kind