2014/10/15 下午 10:08:27

iphone Programming Glossary: equations

how can i trace the finger movement on touch for drawing smooth curves?

http://stackoverflow.com/questions/1052119/how-can-i-trace-the-finger-movement-on-touch-for-drawing-smooth-curves

like the following Collect sample points Define a NURBS curve including its knot vector Set up a system of linear equations for the samples curve Solve the system in the Least Squares sense Assuming you can pick a reasonable NURBS knot vector this..

Convert to Float and Calculate

http://stackoverflow.com/questions/14155360/convert-to-float-and-calculate

Drawing formulas with Quartz 2d

http://stackoverflow.com/questions/2907045/drawing-formulas-with-quartz-2d

improve this question As the developer of an iPhone application which does just that trust me when I say typesetting equations is not a trivial undertaking. In my case I used Core Animation layers to construct the sub elements of a parsed equation... a trivial undertaking. In my case I used Core Animation layers to construct the sub elements of a parsed equation. The equations are constructed hierarchically and the operations that compose them are laid out as such. Each operation is contained within.. drawing extensions. I did override the standard CALayer rendering architecture for the generation of PDFs from these equations because CALayers don't render as vector elements by default. For an example of how this rendering works in my application..

Math rendering library for iPhone OS

http://stackoverflow.com/questions/3491971/math-rendering-library-for-iphone-os

rendering library for iPhone OS Is there a library to render mathematical equations that can be used in iPhone OS I would be very happy with a library that renders MathML or LaTeX to a format that iPhone..

iOS based OpenGL ES programming

http://stackoverflow.com/questions/6074688/ios-based-opengl-es-programming

More specifically I want to create a water ripple effect that follows the users finger. I know there are many equations on StackFlow that implement this but I'm lost when it comes to finding out how to use them. iphone ios opengl es opengl..

Transforming a rectangle image into a quadrilateral using a CATransform3D

http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d

a CATransform3D 4x4 matrix. Do you have any hints on how to do that I've tried to take the four points and build 16 equations out of A' A x u but it did not work I'm not sure of what I should use as z z' w and w' coefficients p The following picture..