=====INTRODUCTION=====
Ncaster is a generic raycasting engine for the TI-Nspire/CAS calculators. 
It has the following features:
*Texture-mapped walls
*Variable height blocks
*Variable altitudes for blocks
*Sprites
*Changeable quality
*Changeable resolution
=====USE=====
The core of the engine is the function
render(
  int *map,
  int mapWidth, int mapHeight,
  float *height,
  float *alt,
  char *texture[],
  int *texW, int *texH,
  struct Sprite *sprite,
  int numSprites,
  int w, int h,
  float heye,
  float posX, float posY,
  float planeX, float planeY,
  char *scrbuf,
  float *zbuf,
  int *colbuf, 
  int res
)
found in render.h

map: pointer to the (0, 0) element of a two dimensional array containing
     the map data. Each element of the array is a block, with 0 being 
     no block. If the element at (a, b) is k (k != 0) this specifies that 
     the block at (a, b) has texture texture[k - 1].
mapWidth, mapHeight, numSprites: self-explanatory.
texW, texH: pointers to the first element of an array of int. texW[i] is 
            the width of texture[i]. Similar for texH.
height: Each block is 1 x 1. height[a][b] = h means that the block at (a, b)
        has height h.
alt: The value at alt[a][b] is the altitude of the bottom of the block at 
     (a, b).
texture: an array of pointers to char, each of which points to the (0, 0) 
         element of a texture.
w, h: Width and height of the screen area to draw to.
heye: Height of the camera.
posX, posY: position of the camera.
dirX, dirY: direction of the camera, in vector form. 
planeX, planeY: Two variables needed by the renderer. See example for details.
scrbuf: Screen buffer to draw to.
zbuf: Z-buffer to use.
colbuf: Column buffer (length-240 int array) to use. 
res: Either 1 or 2. 1 tells the renderer to draw every column. 
     2 tells it to draw every other column.  
====BUILDING====
cd to src/ and type 'make' to build your project. For starters, you may want to edit main.c, which is a demo. You will need Ndless 1.7 and an arm-elf-gcc to build this project.