What are some rasterization algorithms that can just project a 3d sphere into a pixel grid? I want to avoid ray casting. Essentially, given a 3d coordinate and a radius, is there a quick way to just create a 2d circle/ellipse on a pixel grid? For example: circle at (2,2,2) with radius 4 gets projected to five pixels: p1(2,0)p2(0,1) p3...
I'm currently working on a project where I've been tasked with implementing a feature that will allow users to flip through a book in PDF format. I've tried searching for existing software and components that would help with this task, and I've found a few... The problem though, is that the client is quite rigid about how they want thi...
Rasterisation (triangles) and ray tracing are the only methods I've ever come across to render a 3D scene. Are there any others? Also, I'd love to know of any other really "out there" ways of doing 3D, such as not using polygons. ...
Hi, I have generated a plot like figure; hold; axis([0 10 0 10]); fill([ 1 1 5 5], [5 1 1 5],'b') and now I want to have this plot as an matrix so that I can i.e. filter the blog with a gaussian. Googleing I found this thread Rasterizing Plot to Image at Matlab Central. I tried it, but I could only get it to work for line or function...
Hi, I was using ghostscript 8.15 for pdf rasterization on a x86_64 system. Now because of new features I want to switch to version 8.70. However, I noticed that Ghostscript made a note about supporting only 32 bit postscript integers in version 8.70. I don't quite understand how this could affect the behavior of my application and was ...
I'm writing my own graphics library (yep, its homework:) and use cuda to do all rendering and calculations fast. I have problem with drawing filled triangles. I wrote it such a way that one process draw one triangle. It works pretty fine when there are a lot of small triangles on the scene, but it breaks performance totally when triangl...
Hi, I'm making a software rasterizer, and I've run into a bit of a snag: I can't seem to get perspective-correct texture mapping to work. My algorithm is to first sort the coordinates to plot by y. This returns a highest, lowest and center point. I then walk across the scanlines using the delta's: // ordering by y is put here order[0...
Edit Here is the proper way to do it, and the documentation: import random from osgeo import gdal, ogr RASTERIZE_COLOR_FIELD = "__color__" def rasterize(pixel_size=25) # Open the data source orig_data_source = ogr.Open("test.shp") # Make a copy of the layer's data source because we'll need to # modify its attribu...
Hi, I am trying to convert text into graphics using c#. My input is character string and output is bitmap with the input text. After lot of search I found some ways to do it, I found some techiques which uses this kind of techinque. For Example While creating Captcha, we have to print the character in the bitmap. But for that I sho...
Hello, I am writing a MovieClip rasterizer which rasterizes all the frames in the specified movieclip. Here's the code for rasterizing: for ( var i:int = start; i <= end; i++ ) { //goto the next frame clip.gotoAndStop( i ); //get the bounds bounds = clip.getBounds(clip); //create a new bitmapdata container bitmapData = new Bitma...
I am planning to write a SVG player. To have the animation run at 20 frames/second I want to generate images at that rate and throw it at the screen. Now to do this what would be a better option, whether to convert the SVG into a OPenGL sequence or just rasterize the SVG into a image buffer directly, I am no expert on OpenGL, neither am ...
I have created a whole heap of overlays using MKPolygon and created into a MKPolygonView. This works fine but one of the overlays has a butt load of points (about 800 points) and this causes memory and performance issues. I tried shouldRasterize on the MKPolygonView but this had the opposite affect which I am not surprised. Is there any...
hi, i'm using the Apache Batik SVG Rasterizer Library in python, but when i try to convert a svg into png i get this error Gtk-WARNING **: cannot open display: How can i do to don't use GTK to convert the SVG file Thanks and sorry for my english! ...
I'm currently planning an application which involves manipulating PDFs. My goal is to have a program that i can pass in a PDF as an input which then saves separated grayscale images of the colour channels that the PDF consists of as an output. This is basically a simple RIP. I'm currently using a solution using GhostScript but i want to...