add bitmap

src/pixel/bitmap.scad

@@ -0,0 +1,26 @@
+function _bitmap_row(r_count, row_bits, dimension, range, center, invert) =
+    let(
+        half_d = dimension / 2,
+        offset_p = center ? 0 : half_d,
+        bit = invert ? 0 : 1
+    ) 
+    [for(i = range) if(row_bits[i] == bit) [i - half_d + offset_p, r_count + offset_p]];
+
+
+function bitmap(raw_data, center = true, invert = false) = 
+    let(
+        dimension = sqrt(len(raw_data)),
+        range = [0:dimension - 1],
+        rows = [
+            for(row = range)
+                [for(column = range)
+                    raw_data[row * dimension + column]]
+        ],
+        offset_i = dimension / 2 - 1
+    )
+    [
+        for(i = range) 
+        let(row = _bitmap_row(-i + offset_i, rows[i], dimension, range, center, invert))
+        if(row != []) each row
+        
+    ];