Added missing export of mandel pigment.

diff --git a/Textures.lua b/Textures.lua
index 1456f7d..3a4abaf 100644 (file)
--- a/Textures.lua
+++ b/Textures.lua
@@ -69,10 +69,7 @@ local function make_checkered_pigment(colour1, colour2)
    end
 end
 
-local function make_mandelbrot_pigment()
-
-   local maxiter = 100
-   local set_colour = {0,0,0}
+local function make_mandelbrot_pigment(set_colour, max_iter)
 
    local function get_col(x,y,cx,cy,iter)
       if iter == 0 then
@@ -85,13 +82,10 @@ local function make_mandelbrot_pigment()
                         2*x*y + cy,
                         cx, cy, iter-1)
       end
-
-      local xp = x^2 - y^2 + cx
-      local yp = 2*x*y + cy
    end
 
    return function (x,y)
-      get_col(0,0,x,y,maxiter)
+      get_col(0,0,x,y,max_iter)
    end
 end
    
@@ -100,7 +94,8 @@ Textures = {
    make_flat_texture = make_flat_texture,
    make_count_texture = make_count_texture,
    make_solid_pigment = make_solid_pigment,
-   make_checkered_pigment = make_checkered_pigment
+   make_checkered_pigment = make_checkered_pigment,
+   make_mandelbrot_pigment = make_mandelbrot_pigment
 }
 
 return Textures