Switched output format to P6.

[raymarcher.git] / Render.lua

diff --git a/Render.lua b/Render.lua
index 17f244d..57cb407 100644 (file)
--- a/Render.lua
+++ b/Render.lua
@@ -43,7 +43,7 @@ local function render(scene, width, height, filename)
    print("Rendering to file " .. filename .. "...")
    
    local f = io.open(filename, "w")
-   f:write("P3 ", width, " ", height, " 255\n")
+   f:write("P6 ", width, " ", height, " 255\n")
 
    local c = scene.camera
    local cam_dir = V.normalize(c.point_at - c.location)
@@ -64,15 +64,13 @@ local function render(scene, width, height, filename)
       for x=1,width do
          local ray_dir = normalize(rayy + right*((x/width - 0.5)*c.fov))
          local col = march(c.location, c.location, ray_dir, scene.sdf, 0)
-         col = {math.min(col[1]*255, 255),
-                math.min(col[2]*255, 255),
-                math.min(col[3]*255, 255)}
+         col = {math.floor(math.min(col[1]*255, 255)),
+                math.floor(math.min(col[2]*255, 255)),
+                math.floor(math.min(col[3]*255, 255))}
 
-         f:write(math.floor(col[1]), " ", math.floor(col[2]), " ", math.floor(col[3]), " ")
+         f:write(string.char(col[1]), string.char(col[2]), string.char(col[3]))
       end
-      f:write("\n")
    end
-   f:write("\n")
 
    f:close()