gamnit: fix color buffer clearing issues on some computers

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

diff --git a/lib/gamnit/flat.nit b/lib/gamnit/flat.nit
index ebe6fc2..70d8c53 100644 (file)
--- a/lib/gamnit/flat.nit
+++ b/lib/gamnit/flat.nit
@@ -30,17 +30,18 @@
 #   devices. It is used to position the sprites in `App::ui_sprites`.
 #
 # See the sample game at `contrib/asteronits/` and the basic project template
-# at `lib/gamnit/examples/template_flat/`.
+# at `lib/gamnit/examples/template/`.
 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
 
 import gamnit
-import gamnit::cameras
+import gamnit::cameras_cache
 import gamnit::dynamic_resolution
 import gamnit::limit_fps
 import gamnit::camera_control
@@ -374,9 +375,6 @@ redef class App
 
        redef fun frame_core(display)
        do
-               # Prepare to draw, clear buffers
-               glClear(gl_COLOR_BUFFER_BIT | gl_DEPTH_BUFFER_BIT)
-
                # Check errors
                var gl_error = glGetError
                assert gl_error == gl_NO_ERROR else print_error gl_error
@@ -903,7 +901,7 @@ 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
@@ -1123,7 +1121,7 @@ end
 #
 # array.add "E"
 # assert array.to_s == "[A,B,c,D,E]"
-# assert array.capacity == 5
+# assert array.capacity == 6
 # assert array.length == 5
 #
 # array.remove "A"
@@ -1305,3 +1303,21 @@ 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