matrix: use a custom low-level C structure to avoid boxing of param types

[nit.git] / lib / gamnit / flat.nit

diff --git a/lib/gamnit/flat.nit b/lib/gamnit/flat.nit
index d5d2ef1..18d02f6 100644 (file)
--- a/lib/gamnit/flat.nit
+++ b/lib/gamnit/flat.nit
@@ -35,6 +35,7 @@ module flat
 
 import glesv2
 intrude import geometry::points_and_lines # For _x, _y and _z
+intrude import matrix
 import matrix::projection
 import more_collections
 import performance_analysis
@@ -859,7 +860,7 @@ private class SpriteContext
                        else
                                rot = new Matrix.rotation(sprite.rotation, 0.0, 0.0, 1.0)
                        end
-                       data.fill_from(rot.items, o+15)
+                       data.fill_from_matrix(rot, o+15)
 
                        o += float_per_vertex
                end
@@ -1257,3 +1258,21 @@ private class GroupedArray[E]
                return ss.join
        end
 end
+
+redef class GLfloatArray
+       private fun fill_from_matrix(matrix: Matrix, dst_offset: nullable Int)
+       do
+               dst_offset = dst_offset or else 0
+               var mat_len = matrix.width*matrix.height
+               assert length >= mat_len + dst_offset
+               native_array.fill_from_matrix_native(matrix.items, dst_offset, mat_len)
+       end
+end
+
+redef class NativeGLfloatArray
+       private fun fill_from_matrix_native(matrix: matrix::NativeDoubleArray, dst_offset, len: Int) `{
+               int i;
+               for (i = 0; i < len; i ++)
+                       self[i+dst_offset] = (GLfloat)matrix[i];
+       `}
+end