From d109fa83bd9678fc3c9e21da48e90aa069ec1c7f Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Thu, 13 Oct 2022 14:29:23 +0200
Subject: a

---
 draw/floor-mesh.cpp     | 1 +
 draw/wall-mesh.cpp      | 1 +
 draw/wireframe-mesh.cpp | 2 +-
 draw/wireframe-mesh.hpp | 1 +
 4 files changed, 4 insertions(+), 1 deletion(-)

(limited to 'draw')

diff --git a/draw/floor-mesh.cpp b/draw/floor-mesh.cpp
index da8fe7f2..4c23a391 100644
--- a/draw/floor-mesh.cpp
+++ b/draw/floor-mesh.cpp
@@ -32,6 +32,7 @@ void floor_mesh::set_tile(quad_data& data, tile& x)
 
 void floor_mesh::draw(tile_shader& shader, chunk& c)
 {
+    _vertex_buffer.setData({nullptr, sizeof(quad_data) * TILE_COUNT}, Magnum::GL::BufferUsage::DynamicDraw); // orphan the buffer
     std::array<quad_data, TILE_COUNT> data;
     for (auto& [x, idx, pt] : c) {
         set_tile(data[idx], x);
diff --git a/draw/wall-mesh.cpp b/draw/wall-mesh.cpp
index acd4ac75..81201598 100644
--- a/draw/wall-mesh.cpp
+++ b/draw/wall-mesh.cpp
@@ -39,6 +39,7 @@ void wall_mesh::maybe_add_tile(vertex_array& data, texture_array& textures, tile
 
 void wall_mesh::draw(tile_shader& shader, chunk& c)
 {
+    _vertex_buffer.setData({nullptr, sizeof(vertex_array)}, Magnum::GL::BufferUsage::DynamicDraw); // orphan the buffer
     texture_array textures = {};
     {
         vertex_array data;
diff --git a/draw/wireframe-mesh.cpp b/draw/wireframe-mesh.cpp
index 32aa72aa..0b6846d7 100644
--- a/draw/wireframe-mesh.cpp
+++ b/draw/wireframe-mesh.cpp
@@ -29,7 +29,7 @@ GL::RectangleTexture mesh_base::make_constant_texture()
 
 mesh_base::mesh_base(GL::MeshPrimitive primitive, Containers::ArrayView<const void> index_data,
                      std::size_t num_vertices, std::size_t num_indexes) :
-    _vertex_buffer{Containers::Array<Vector3>{ValueInit, num_vertices}},
+    _vertex_buffer{Containers::Array<Vector3>{ValueInit, num_vertices}, GL::BufferUsage::DynamicDraw},
     _texcoords_buffer{Containers::Array<Vector2>{ValueInit, num_vertices}},
     _index_buffer{num_indexes == 0 ? GL::Buffer{NoCreate} : GL::Buffer{index_data}}
 {
diff --git a/draw/wireframe-mesh.hpp b/draw/wireframe-mesh.hpp
index 3c0deb37..6c1a7d3f 100644
--- a/draw/wireframe-mesh.hpp
+++ b/draw/wireframe-mesh.hpp
@@ -55,6 +55,7 @@ wireframe_mesh<T>::wireframe_mesh() :
 
 template <wireframe::traits T> void wireframe_mesh<T>::draw(tile_shader& shader, T x)
 {
+    _vertex_buffer.setData({nullptr, sizeof(Vector3) * T::num_vertices}, GL::BufferUsage::DynamicDraw); // orphan the buffer
     _vertex_buffer.setSubData(0, x.make_vertex_array());
     x.on_draw();
     mesh_base::draw(shader);
-- 
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